SDL_sound_CoreAudio: alt_audio

annotate alt_audio_convert.c @ 403:b1e511c879d1

More altcvt updates and fixes from Frank.

author	Ryan C. Gordon <icculus@icculus.org>
date	Sat, 13 Jul 2002 23:41:08 +0000
parents	44ed8bdeba74
children	5b8a07b5162e

rev	line source
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	1 /*
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	2 * Extended Audio Converter for SDL (Simple DirectMedia Layer)
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	3 * Copyright (C) 2002 Frank Ranostaj
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	4 * Institute of Applied Physik
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	5 * Johann Wolfgang Goethe-Universität
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	6 * Frankfurt am Main, Germany
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	7 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	8 * This library is free software; you can redistribute it and/or
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	9 * modify it under the terms of the GNU Library General Public
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	10 * License as published by the Free Software Foundation; either
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	11 * version 2 of the License, or (at your option) any later version.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	12 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	13 * This library is distributed in the hope that it will be useful,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	16 * Library General Public License for more details.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	17 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	18 * You should have received a copy of the GNU Library General Public
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	19 * License along with this library; if not, write to the Free
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	21 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	22 * Frank Ranostaj
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	23 * ranostaj@stud.uni-frankfurt.de
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	24 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	25 * (This code blatantly abducted for SDL_sound. Thanks, Frank! --ryan.)
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	26 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 #include "alt_audio_convert.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 #include <math.h>
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	31 /* just to make sure this is defined... */
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	32
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	33 #ifndef min
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	34 #define min(x, y) ( ((x) < (y)) ? (x) : (y) )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	35 #endif
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	36
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	37 #ifndef max
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	38 #define max(x, y) ( ((x) > (y)) ? (x) : (y) )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	39 #endif
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	40
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	41 #ifndef abs
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	42 #define abs(x) ( ((x) > (0)) ? (x) : -(x) )
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	43 #endif
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	44
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	45
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	46 /* some macros for "parsing" format */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	47
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	48 #define IS_8BIT(x) ((x).format & 0x0008)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	49 #define IS_16BIT(x) ((x).format & 0x0010)
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	50 #define IS_FLOAT(x) ((x).format & 0x0020)
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	51 #define IS_SIGNED(x) ((x).format & 0x8000)
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	52 #define IS_SYSENDIAN(x) ((~AUDIO_U16SYS ^ (x).format) & 0x1000)
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	53 #define SDL_MSB_POSITION_IN_SHORT ((0x1000 & AUDIO_U16SYS)>>12)
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	57 /* the purpose of the RateConverterBuffer is to provide a continous storage
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	58 for head and tail of the (sample)-buffer. This allows a simple and
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	59 perfomant implemantation of the sample rate converters. Depending of the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	60 operation mode, two layouts for the RateConverterBuffer.inbuffer are
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	61 possible:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	62
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	63 in the Loop Mode:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	64 ... T-4 T-3 T-2 T-1 H+0 H+1 H+2 H+3 H+4 ...
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	65 \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	66 linp, finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	67
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	68 in the Single Mode (non Loop):
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	69 ... T-4 T-3 T-2 T-1 0 0 0 ... 0 0 0 H+0 H+1 H+2 H+3 H+4 ...
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	70 \| \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	71 linp finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	72
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	73 The RateConverterBuffer allows an accurate attack and decay of the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	74 filters in the rate Converters.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	75
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	76 The pointer finp are actually shifted against the depicted position so
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	77 that on the first invocation of the rate converter the input of the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	78 filter is nearly complete in the zero region, only one input value is
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	79 used. After the calculation of the first output value, the pointer are
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	80 incremented or decremented depending on down or up conversion and the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	81 first two input value are taken into account. This procedure repeats
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	82 until the filter has processed all zeroes. The distance of the pointer
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	83 movement is stored in flength, always positive.
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	84
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	85 Further a pointer cinp to the sample buffer itself is stored. The pointer
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	86 to the sample buffer is shifted too, so that on the first use of this
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	87 pointer the filter is complete in the sample buffer. The pointer moves
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	88 over the sample buffer until it reaches the other end. The distance of
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	89 the movement is stored in clength.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	90
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	91 Finally the decay of the filter is done by linp and llength like finp,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	92 flength, but in reverse order.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	93
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	94 buffer denotes the start or the end of the output buffer, depending
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	95 on direction of the rate conversion.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	96
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	97 All pointer and length referring the buffer as Sint16. All length
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	98 are refering to the input buffer */
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	99
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	100 typedef struct
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	101 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	102 Sint16 inbuffer[24*_fsize];
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	103 Sint16 finp, cinp, *linp;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	104 int flength, clength, llength;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	105 Sint16 *buffer;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	106 VarFilter *filter;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	107 } RateConverterBuffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	108
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	109 typedef struct
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	110 {
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	111 Sint16 carry;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	112 Sint16 pos;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	113 } RateAux;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	114
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 /* Mono (1 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 #define Suffix(x) x##1
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121 /* Stereo (2 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	122 #define Suffix(x) x##2
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	123 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	126
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	127 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	128 static int ConvertAudio( Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	129 Uint8* buffer, int length, int mode )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	130 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	131 AdapterC Temp;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	132 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	133
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	134 /* Make sure there's a converter */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	135 if( Data == NULL ) {
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	136 SDL_SetError("altcvt: No converter given");
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	137 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	138 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	139
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	140 /* Make sure there's data to convert */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	141 if( buffer == NULL ) {
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	142 SDL_SetError("altcvt: No buffer allocated for conversion");
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	143 return(-1);
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	144 }
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	145
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	146 if( length < 0 ) {
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	147 SDL_SetError("altcvt: Length < 0");
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	148 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	149 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	150
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	151 /* Set up the conversion and go! */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	152 Temp.buffer = buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	153 Temp.mode = mode;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	154 Temp.filter = &Data->filter;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	155
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	156 for( i = 0; Data->adapter[i] != NULL; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	157 length = (*Data->adapter[i])( Temp, length);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	158
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	159 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	160 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	161
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	162 int Sound_ConvertAudio( Sound_AudioCVT *Data )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	163 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	164 int length;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	165 /* !!! FIXME: Try the looping stuff under certain circumstances? --ryan. */
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	166 length = ConvertAudio( Data, Data->buf, Data->len, 0 );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	167 Data->len_cvt = length;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	168 return length;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	169 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	170
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	171 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	172 static int expand8BitTo16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	173 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	174 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	175 Uint8* inp = Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	176 Uint16* buffer = (Uint16*)Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	177 for( i = length + 1; --i; )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	178 buffer[i] = inp[i]<<8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	179 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	180 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	182 static int expand8BitTo16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	183 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	184 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	185 Uint8* inp = Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	186 Uint16* buffer = (Uint16*)Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	187 for( i = length + 1; --i; )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	188 buffer[i] = inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	189 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	193 static int expand16BitToFloat( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	195 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	196 Sint16* inp = (Sint16*)Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	197 float* buffer = (float*)Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	198 for( i = length>>1 + 1; --i; )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	199 buffer[i] = inp[i]*(1./32767);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	200 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	201 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	202
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	203 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	204 static int swapBytes( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	205 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	206 /*
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	207 * !!! FIXME !!!
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	208 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	209 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	210 * Use the faster SDL-Macros to swap
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	211 * - Frank
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	212 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	213
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	214 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	215 Uint16 a,b;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	216 Uint16* buffer = (Uint16*) Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	217 for( i = length>>1 + 1; --i; )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	218 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	219 a = b = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	220 buffer[i] = ( a << 8 ) \| ( b >> 8 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	221 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	222 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	223 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	225 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	226 static int cutFloatTo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	228 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	229 float* inp = (float*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	230 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	231 length>>=2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	232 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	233 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	234 if( inp[i] > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	235 buffer[i] = 32767;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	236 else if( inp[i] < -1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	237 buffer[i] = -32768;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	238 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	239 buffer[i] = 32767 * inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	240 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	241 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	242 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	243
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	244 /-------------------------------------------------------------------------/
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	245 static int cut16BitTo8Bit( AdapterC Data, int length, int off )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	246 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	247 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	248 Uint8* inp = Data.buffer + off;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	249 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	250 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	251 for( i = 0; i < length; i++ )
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	252 buffer[i] = inp[2*i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	253 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	254 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	255
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	256 static int cut16BitSysTo8Bit( AdapterC Data, int length )
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	257 {
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	258 return cut16BitTo8Bit( Data, length, SDL_MSB_POSITION_IN_SHORT );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	259 }
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	260
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	261 static int cut16BitWrongTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	262 {
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	263 return cut16BitTo8Bit( Data, length, 1-SDL_MSB_POSITION_IN_SHORT );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266 /-------------------------------------------------------------------------/
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	267 /* poor mans mmx :-) */
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	268 static int changeSigned( AdapterC Data, int length, Uint32 XOR )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	270 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	271 Uint32* buffer = (Uint32*) Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	272 for( i = ( length + 7 ) >> 2; --i; )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	273 buffer[i] ^= XOR;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	274 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	275 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	276
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	277 static int changeSigned16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	278 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	279 return changeSigned( Data, length, 0x80008000 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	280 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	281
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	282 static int changeSigned16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	283 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	284 return changeSigned( Data, length, 0x00800080 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	285 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	286
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	287 static int changeSigned8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	288 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	289 return changeSigned( Data, length, 0x80808080 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	290 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	291
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	292 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	293 static int convertStereoToMonoS16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	294 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	295 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	296 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	297 Sint16* src = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	298 length >>= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	299 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	300 buffer[i] = ((int) src[0] + src[1] ) >> 1;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	301 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	302 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	303
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	304 static int convertStereoToMonoU16Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	305 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	306 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	307 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	308 Uint16* src = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	309 length >>= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	310 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	311 buffer[i] = ((int) src[0] + src[1] ) >> 1;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	312 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	313 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	314
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	315 static int convertStereoToMonoS8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	316 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	317 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	318 Sint8* buffer = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	319 Sint8* src = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	320 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	321 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	322 buffer[i] = ((int) src[0] + src[1] ) >> 1;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	323 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	324 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	325
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	326 static int convertStereoToMonoU8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	327 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	328 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	329 Uint8* buffer = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	330 Uint8* src = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	331 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	332 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	333 buffer[i] = ((int) src[0] + src[1] ) >> 1;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	334 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	335 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	336
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	337 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	338 static int convertMonoToStereo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	339 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	340 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	341 Uint16* buffer = (Uint16*)Data.buffer - 1;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	342 Uint16* dst = (Uint16*)Data.buffer + length - 2;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	343 for( i = length>>1 + 1; --i; dst-=2 )
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	344 dst[0] = dst[1] = buffer[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	345 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	346 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	347
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	348 static int convertMonoToStereo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	349 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	350 int i;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	351 Uint8* buffer = Data.buffer - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	352 Uint8* dst = Data.buffer + length - 2;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	353 for( i = length + 1; --i; dst-=2 )
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	354 dst[0] = dst[1] = buffer[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	355 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	356 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	357
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	358 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	359 static int minus5dB( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	360 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	361 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	362 Sint16* buffer = (Sint16*) Data.buffer;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	363 for(i = length>>1 + 1; --i; )
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	364 buffer[i] = (38084 * (int)buffer[i]) >> 16;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	365 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	366 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	367
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	368 /-------------------------------------------------------------------------/
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	369 const Fraction Half = {1, 2};
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	370 const Fraction Double = {2, 1};
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	371
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	372 static void initStraigthBuffer( RateConverterBuffer *rcb,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	373 int length, Fraction r, int dir )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	374 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	375 int i, size, minsize;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	376 size = 8 * _fsize;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	377 minsize = min( size, length );
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	378
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	379 for( i = 0; i < minsize; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	380 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	381 rcb->inbuffer[i] = rcb->buffer[length-size+i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	382 rcb->inbuffer[i+size] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	383 rcb->inbuffer[i+2*size] = rcb->buffer[i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	384 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	385 for( ; i < size; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	386 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	387 rcb->inbuffer[i] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	388 rcb->inbuffer[i+size] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	389 rcb->inbuffer[i+2*size] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	390 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	391
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	392 length = max( length, size );
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	393 rcb->flength = rcb->llength = size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	394 rcb->clength = length - size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	395
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	396 if( dir )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	397 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	398 rcb->finp = rcb->inbuffer + 5 * size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	399 rcb->cinp = rcb->buffer + length - size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	400 rcb->linp = rcb->inbuffer + 3*size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	401 rcb->buffer += r.denominator * ( length + size )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	402 / r.numerator;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	403 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	404 else
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	405 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	406 rcb->finp = rcb->inbuffer + size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	407 rcb->cinp = rcb->buffer + size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	408 rcb->linp = rcb->inbuffer + 3*size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	409 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	410 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	411
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	412 static void initLoopBuffer( RateConverterBuffer *rcb,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	413 int length, Fraction r, int dir )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	414 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	415 /* !!!FIXME: modulo length, take scale into account,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	416 check against the Straight part -frank */
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	417 int i, size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	418 size = 8 * _fsize;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	419 for( i = 0; i < size; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	420 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	421 rcb->inbuffer[i] = rcb->buffer[length-size+i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	422 rcb->inbuffer[i+size] = rcb->buffer[i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	423 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	424 rcb->finp = rcb->linp = rcb->inbuffer + size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	425 if( size < 0 )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	426 rcb->buffer += r.numerator * ( length + 2 * size )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	427 / r.denominator;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	428 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	429
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	430 static void initRateConverterBuffer( RateConverterBuffer *rcb,
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	431 AdapterC* Data, int length, Fraction ratio )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	432 {
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	433 int dir;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	434 dir = ratio.numerator < ratio.denominator ? 1 : 0;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	435 length >>= 1;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	436 rcb->buffer = (Sint16*)( Data->buffer );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	437 rcb->filter = Data->filter;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	438
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	439 if( Data->mode & SDL_SOUND_Loop )
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	440 initLoopBuffer( rcb, length, ratio, dir );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	441 else
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	442 initStraigthBuffer( rcb, length, ratio, dir );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	443 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	444
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	445 static void nextRateConverterBuffer( RateConverterBuffer *rcb )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	446 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	447 rcb->buffer++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	448 rcb->finp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	449 rcb->cinp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	450 rcb->linp++;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	451 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	452
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	453 typedef Sint16* (RateConverter)( Sint16, Sint16*, int,
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	454 VarFilter, RateAux );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	455
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	456 static int doRateConversion( RateConverterBuffer* rcb, RateConverter ffp )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	457 {
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	458 RateAux aux = {0,0};
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	459 Sint16 *outp = rcb->buffer;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	460 VarFilter* filter = rcb->filter;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	461
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	462 outp = (*ffp)( outp, rcb->finp, rcb->flength, filter, &aux );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	463 outp = (*ffp)( outp, rcb->cinp, rcb->clength, filter, &aux );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	464 outp = (*ffp)( outp, rcb->linp, rcb->llength, filter, &aux );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	465 return 2 * abs( rcb->buffer - outp );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	466 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	467
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	468
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	469 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	470 static int doubleRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	471 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	472 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	473 initRateConverterBuffer( &rcb, &Data, length, Double );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	474 return doRateConversion( &rcb, doubleRate1 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	475 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	476
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	477 static int doubleRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	478 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	479 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	480 initRateConverterBuffer( &rcb, &Data, length, Double );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	481 doRateConversion( &rcb, doubleRate2 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	482 nextRateConverterBuffer( &rcb );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	483 return 2 + doRateConversion( &rcb, doubleRate2 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	484 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	485
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	486 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	487 static int halfRateMono( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	488 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	489 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	490 initRateConverterBuffer( &rcb, &Data, length, Half );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	491 return doRateConversion( &rcb, halfRate1 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	492 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	493
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	494 static int halfRateStereo( AdapterC Data, int length )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	495 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	496 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	497 initRateConverterBuffer( &rcb, &Data, length, Half );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	498 doRateConversion( &rcb, halfRate2 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	499 nextRateConverterBuffer( &rcb );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	500 return 2 + doRateConversion( &rcb, halfRate2 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	501 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	502
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	503 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	504 static int increaseRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	505 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	506 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	507 initRateConverterBuffer( &rcb, &Data, length, Data.filter->ratio );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	508 return doRateConversion( &rcb, increaseRate1 );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	509 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	510
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	511 static int increaseRateStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	512 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	513 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	514 initRateConverterBuffer( &rcb, &Data, length, Data.filter->ratio );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	515 doRateConversion( &rcb, increaseRate2 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	516 nextRateConverterBuffer( &rcb );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	517 return 2 + doRateConversion( &rcb, increaseRate2 );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	518 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	519
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	520 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	521 static int decreaseRateMono( AdapterC Data, int length )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	522 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	523 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	524 initRateConverterBuffer( &rcb, &Data, length, Data.filter->ratio );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	525 return doRateConversion( &rcb, decreaseRate1 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	526 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	527
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	528 static int decreaseRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	529 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	530 RateConverterBuffer rcb;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	531 initRateConverterBuffer( &rcb, &Data, length, Data.filter->ratio );
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	532 doRateConversion( &rcb, decreaseRate2 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	533 nextRateConverterBuffer( &rcb );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	534 return 2 + doRateConversion( &rcb, decreaseRate2 );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	535 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	536
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	537 /-------------------------------------------------------------------------/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	538 static int padSilence( AdapterC Data, int length )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	539 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	540 Uint32 zero, *buffer;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	541 int i, mask = 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	542
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	543 buffer = (Uint32*) ( Data.buffer + length );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	544 if( Data.mode != SDL_SOUND_Loop )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	545 mask = Data.filter->mask;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	546 length = mask - ( ( length - 1 ) & mask );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	547
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	548 for( i = 0; i < length>>2; i++ )
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	549 buffer[i] = zero;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	550 for( ; i < length; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	551 ((Uint8)buffer)[i] = ((Uint8)&zero)[i&3];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	552
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	553 return length + ((Uint8*)buffer - Data.buffer);
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	554 }
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	555
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	556 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	557 /* gives a maximal error of 3% and typical less than 0.2% */
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	558 static Fraction findFraction( float Value )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	559 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	560 const Sint8 frac[95]={
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	561 2, -1, /* /1 */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	562 1, 3, -1, /* /2 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	563 2, 4, 5, -1, /* /3 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	564 3, 5, 7, -1, /* /4 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	565 3, 4, 6, 7, 8, 9, -1, /* /5 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	566 5, 7, 11, -1, /* /6 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	567 4, 5, 6, 8, 9, 10, 11, 12, 13, -1, /* /7 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	568 5, 7, 9, 11, 13, 15, -1, /* /8 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	569 5, 7, 8, 10, 11, 13, 14, 16, -1, /* /9 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	570 7, 9, 11, 13, -1, /* /10 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	571 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, -1, /* /11 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	572 7, 11, 13, -1, /* /12 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	573 7, 8, 9, 10, 11, 12, 14, 15, 16, -1, /* /13 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	574 9, 11, 13, 15, -1, /* /14 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	575 8, 11, 13, 14, 16, -1, /* /15 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	576 9, 11, 13, 15 }; /* /16 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	577
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	578
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	579 Fraction Result = {0,0};
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	580 int i,num,den=1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	581
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	582 float RelErr, BestErr = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	583 if( Value < 31/64. \|\| Value > 64/31. ) return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	584
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	585 for( i = 0; i < SDL_TABLESIZE(frac); i++ )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	586 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	587 num = frac[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	588 if( num < 0 ) den++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	589 RelErr = Value * num / den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	590 RelErr = min( RelErr, 1/RelErr );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	591 if( RelErr > BestErr )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	592 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	593 BestErr = RelErr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	594 Result.denominator = den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	595 Result.numerator = num;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	596 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	597 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	598 return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	599 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	600
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	601 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	602 static float sinc( float x )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	603 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	604 if( x > -1e-24 && x < 1e-24 ) return 1.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	605 else return sin(x)/x;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	606 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	607
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	608 static float calculateVarFilter( Sint16* dst,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	609 float Ratio, float phase, float scale )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	610 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	611 const Uint16 KaiserWindow7[]= {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	612 22930, 16292, 14648, 14288, 14470, 14945, 15608, 16404,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	613 17304, 18289, 19347, 20467, 21644, 22872, 24145, 25460,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	614 26812, 28198, 29612, 31052, 32513, 33991, 35482, 36983,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	615 38487, 39993, 41494, 42986, 44466, 45928, 47368, 48782,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	616 50165, 51513, 52821, 54086, 55302, 56466, 57575, 58624,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	617 59610, 60529, 61379, 62156, 62858, 63483, 64027, 64490,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	618 64870, 65165, 65375, 65498, 65535, 65484, 65347, 65124,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	619 64815, 64422, 63946, 63389, 62753, 62039, 61251, 60391 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	620 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	621 float w;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	622 const float fg = -.018 + .5 * Ratio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	623 const float omega = 2 * M_PI * fg;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	624 fprintf( stderr, " phase: %6g \n", phase );
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	625 phase += 63;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	626 for( i = 0; i < 64; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	627 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	628 w = scale * ( KaiserWindow7[i] * ( i + 1 ));
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	629 dst[i] = w * sinc( omega * (i-phase) );
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	630 dst[127-i] = w * sinc( omega * (127-i-phase) );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	631 }
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	632 fprintf( stderr, " center: %6d %6d \n", dst[63], dst[64] );
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	633 return fg;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	634 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	635
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	636 static Fraction setupVarFilter( VarFilter* filter, float Ratio )
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	637 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	638 int pos,n,d, incr, phase = 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	639 float Scale, rd, fg;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	640 Fraction IRatio;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	641
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	642 IRatio = findFraction( Ratio );
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	643 // Scale = Ratio < 1. ? 0.0364733 : 0.0211952;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	644 Scale = 0.0084778;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	645 Ratio = min( Ratio, 0.97 );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	646
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	647 filter->ratio = IRatio;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	648 n = IRatio.numerator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	649 d = IRatio.denominator;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	650 rd = 1. / d;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	651
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	652 fprintf( stderr, "Filter:\n" );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	653
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	654 for( pos = 0; pos < d; pos++ )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	655 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	656 fg = calculateVarFilter( filter->c[pos], Ratio, phase*rd, Scale );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	657 phase += n;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	658 filter->incr[pos] = phase / d;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	659 phase %= d;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	660 }
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	661 fprintf( stderr, " fg: %6g\n\n", fg );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	662 /* !!!FIXME: get rid of the inversion -Frank*/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	663 IRatio.numerator = d;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	664 IRatio.denominator = n;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	665 return IRatio;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	666 }
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	667 /-------------------------------------------------------------------------/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	668 static void adjustSize( Sound_AudioCVT *Data, int add, Fraction f )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	669 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	670
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	671 double ratio = f.numerator / (double) f.denominator;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	672 Data->len_ratio *= ratio;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	673 Data->len_mult = max( Data->len_mult, ceil(Data->len_ratio) );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	674 Data->add = ratio * (Data->add + add);
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	675 Data->len_add = max( Data->len_add, ceil(Data->add) );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	676 }
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	677
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	678 static void initSize( Sound_AudioCVT *Data )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	679 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	680 Data->len_ratio = 1.;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	681 Data->len_mult = 1;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	682 Data->add = 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	683 Data->len_add = 0;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	684 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	685
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	686 /-------------------------------------------------------------------------/
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	687 const Adapter doubleRate[2] = { doubleRateMono, doubleRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	688 const Adapter halfRate[2] = { halfRateMono, halfRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	689 const Adapter increaseRate[2] = { increaseRateMono, increaseRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	690 const Adapter decreaseRate[2] = { decreaseRateMono, decreaseRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	691
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	692 static void createRateConverter( Sound_AudioCVT Data, int fip,
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	693 int SrcRate, int DestRate, int channel )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	694 {
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	695 const int c = channel - 1;
b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	696 const int size = 16 * channel * _fsize;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	697 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	698 int VarPos = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	699 float Ratio = DestRate;
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	700 Fraction f;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	701 *fip = -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	702
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	703
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	704 if( SrcRate < 1 \|\| SrcRate > 1<<18 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	705 DestRate < 1 \|\| DestRate > 1<<18 ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	706 Ratio /= SrcRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	707
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	708 if( Ratio > 1.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	709 VarPos = filter_index++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	710 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	711 Data->adapter[filter_index++] = minus5dB;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	712
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	713 while( Ratio > 64./31.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	714 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	715 Ratio /= 2.;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	716 Data->adapter[filter_index++] = doubleRate[c];
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	717 adjustSize( Data, size, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	718 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	719
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	720 while( Ratio < 31./64. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	721 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	722 Ratio *= 2;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	723 Data->adapter[filter_index++] = halfRate[c];
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	724 adjustSize( Data, size, Half );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	725 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	726
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	727 if( Ratio > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	728 {
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	729 Data->adapter[VarPos] = increaseRate[c];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	730 f = setupVarFilter( &Data->filter, Ratio );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	731 adjustSize( Data, size, f );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	732 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	733 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	734 {
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	735 Data->adapter[filter_index++] = decreaseRate[c];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	736 f = setupVarFilter( &Data->filter, Ratio );
403 b1e511c879d1 More altcvt updates and fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 380 diff changeset	737 adjustSize( Data, size, f );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	738 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	739 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	740 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	741
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	742 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	743 static void createFormatConverter16Bit(Sound_AudioCVT Data, int fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	744 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	745 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	746 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	747
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	748 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	749 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	750 adjustSize( Data, 0, Half );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	751
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	752 if( !IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	753 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	754
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	755 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	756 Data->adapter[filter_index++] = convertStereoToMonoS16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	757 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	758 Data->adapter[filter_index++] = convertStereoToMonoU16Bit;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	759
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	760 if( !IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	761 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	762 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	763 else if( IS_SYSENDIAN(src) != IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	764 Data->adapter[filter_index++] = swapBytes;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	765
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	766 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	767 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	768 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	769 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	770 else
368 84d6c604eaa9 Fixes to interface with SDL_sound correctly by Torbjorn. Ryan C. Gordon <icculus@icculus.org> parents: 366 diff changeset	771 Data->adapter[filter_index++] = changeSigned16BitWrong;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	772 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	773
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	774 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	775 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	776 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	777 Data->adapter[filter_index++] = convertMonoToStereo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	778 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	779
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	780 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	781 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	782
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	783 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	784 static void createFormatConverter8Bit(Sound_AudioCVT Data, int fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	785 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	786 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	787 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	788 if( IS_16BIT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	789 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	790 adjustSize( Data, 0, Half );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	791
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	792 if( IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	793 Data->adapter[filter_index++] = cut16BitSysTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	794 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	795 Data->adapter[filter_index++] = cut16BitWrongTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	796 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	797
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	798 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	799 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	800 adjustSize( Data, 0, Half );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	801
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	802 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	803 Data->adapter[filter_index++] = convertStereoToMonoS8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	804 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	805 Data->adapter[filter_index++] = convertStereoToMonoU8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	806 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	807
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	808 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	809 Data->adapter[filter_index++] = changeSigned8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	810
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	811 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	812 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	813 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	814 Data->adapter[filter_index++] = convertMonoToStereo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	815 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	816
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	817 if( !IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	818 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	819 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	820 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	821 Data->adapter[filter_index++] = expand8BitTo16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	822 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	823 Data->adapter[filter_index++] = expand8BitTo16BitWrong;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	824 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	825
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	826 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	827 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	828
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	829 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	830 static void createFormatConverter(Sound_AudioCVT Data, int fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	831 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	832 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	833 int filter_index = *fip;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	834
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	835 if( IS_FLOAT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	836 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	837 Data->adapter[filter_index++] = cutFloatTo16Bit;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	838 adjustSize( Data, 0, Half );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	839 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	840
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	841 if( IS_8BIT(src) \|\| IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	842 createFormatConverter8Bit( Data, &filter_index, src, dst);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	843 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	844 createFormatConverter16Bit( Data, &filter_index, src, dst);
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	845
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	846 if( IS_FLOAT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	847 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	848 Data->adapter[filter_index++] = expand16BitToFloat;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	849 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	850 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	851
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	852 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	853 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	854
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	855 /-------------------------------------------------------------------------/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	856 Uint32 getSilenceValue( Uint16 format )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	857 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	858 const static float fzero[] = {0.0000001};
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	859 switch( format )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	860 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	861 case 0x0020: return (Uint32) fzero;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	862 default: ;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	863 }
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	864 return 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	865 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	866
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	867 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	868 int BuildAudioCVT( Sound_AudioCVT *Data,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	869 SDL_AudioSpec src, SDL_AudioSpec dst )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	870 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	871 SDL_AudioSpec intrm;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	872 int filter_index = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	873
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	874 if( Data == NULL ) return -1;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	875 if( dst.size < 8 ) return -1;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	876
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	877 initSize( Data );
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	878 Data->filter.ratio.denominator = 0;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	879 Data->filter.zero = getSilenceValue( dst.format );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	880 Data->filter.mask = dst.size - 1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	881
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	882
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	883
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	884 /* Check channels */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	885 if( src.channels < 1 \|\| src.channels > 2 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	886 dst.channels < 1 \|\| dst.channels > 2 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	887
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	888 /* If no frequency conversion is needed, go straight to dst format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	889 if( src.freq == dst.freq )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	890 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	891 createFormatConverter( Data, &filter_index, src, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	892 goto sucess_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	893 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	894
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	895 /* Convert to signed 16Bit System-Endian */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	896 intrm.format = AUDIO_S16SYS;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	897 intrm.channels = min( src.channels, dst.channels );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	898 createFormatConverter( Data, &filter_index, src, intrm );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	899
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	900 /* Do rate conversion */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	901 if( src.channels == 2 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	902 createRateConverter( Data, &filter_index, src.freq, dst.freq, 2 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	903 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	904 createRateConverter( Data, &filter_index, src.freq, dst.freq, 1 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	905 /* propagate error */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	906 if( filter_index < 0 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	907
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	908 /* Convert to final format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	909 createFormatConverter( Data, &filter_index, intrm, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	910
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	911 /* Set up the filter information */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	912 sucess_exit:
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	913 Data->adapter[filter_index++] = padSilence;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	914 Data->adapter[filter_index] = NULL;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	915 /* !!! FIXME: Is it okay to assign NULL to a function pointer?
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	916 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	917 return 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	918
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	919 error_exit:
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	920 /* !!! FIXME: Is it okay to assign NULL to a function pointer?
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	921 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	922 Data->adapter[0] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	923 return -1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	924 }
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	925
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	926 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	927 static char *fmt_to_str(Uint16 fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	928 {
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	929 switch (fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	930 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	931 case AUDIO_U8: return " U8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	932 case AUDIO_S8: return " S8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	933 case AUDIO_U16MSB: return "U16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	934 case AUDIO_S16MSB: return "S16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	935 case AUDIO_U16LSB: return "U16LSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	936 case AUDIO_S16LSB: return "S16LSB";
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	937 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	938 return "??????";
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	939 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	940
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	941 #define AdapterDesc(x) { x, #x }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	942
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	943 static void show_AudioCVT( Sound_AudioCVT *Data )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	944 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	945 int i,j;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	946 const struct{ int (adapter) ( AdapterC, int); Sint8 name; }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	947 AdapterDescription[] = {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	948 AdapterDesc(expand8BitTo16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	949 AdapterDesc(expand8BitTo16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	950 AdapterDesc(expand16BitToFloat),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	951 AdapterDesc(swapBytes),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	952 AdapterDesc(cut16BitSysTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	953 AdapterDesc(cut16BitWrongTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	954 AdapterDesc(cutFloatTo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	955 AdapterDesc(changeSigned16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	956 AdapterDesc(changeSigned16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	957 AdapterDesc(changeSigned8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	958 AdapterDesc(convertStereoToMonoS16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	959 AdapterDesc(convertStereoToMonoU16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	960 AdapterDesc(convertStereoToMonoS8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	961 AdapterDesc(convertStereoToMonoU8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	962 AdapterDesc(convertMonoToStereo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	963 AdapterDesc(convertMonoToStereo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	964 AdapterDesc(minus5dB),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	965 AdapterDesc(doubleRateMono),
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	966 AdapterDesc(doubleRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	967 AdapterDesc(halfRateMono),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	968 AdapterDesc(halfRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	969 AdapterDesc(increaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	970 AdapterDesc(increaseRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	971 AdapterDesc(decreaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	972 AdapterDesc(decreaseRateStereo),
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	973 AdapterDesc(padSilence),
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	974 { NULL, "----------NULL-----------\n" }
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	975 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	976
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	977 fprintf( stderr, "Sound_AudioCVT:\n" );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	978 fprintf( stderr, " needed: %8d\n", Data->needed );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	979 fprintf( stderr, " add: %8g\n", Data->add );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	980 fprintf( stderr, " len_add: %8d\n", Data->len_add );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	981 fprintf( stderr, " len_ratio: %8g\n", Data->len_ratio );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	982 fprintf( stderr, " len_mult: %8d\n", Data->len_mult );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	983 fprintf( stderr, " filter->mask: %#7x\n", Data->filter.mask );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	984 fprintf( stderr, "\n" );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	985
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	986 fprintf( stderr, "Adapter List: \n" );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	987 for( i = 0; i < 32; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	988 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	989 for( j = 0; j < SDL_TABLESIZE(AdapterDescription); j++ )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	990 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	991 if( Data->adapter[i] == AdapterDescription[j].adapter )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	992 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	993 fprintf( stderr, " %s \n", AdapterDescription[j].name );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	994 if( Data->adapter[i] == NULL ) goto sucess_exit;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	995 goto cont;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	996 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	997 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	998 fprintf( stderr, " Error: unknown adapter\n" );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	999
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1000 cont:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1001 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1002 fprintf( stderr, " Error: NULL adapter missing\n" );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1003 sucess_exit:
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1004 if( Data->filter.ratio.denominator )
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1005 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1006 fprintf( stderr, "Variable Rate Converter:\n"
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1007 " numerator: %3d\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1008 " denominator: %3d\n",
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1009 Data->filter.ratio.denominator,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1010 Data->filter.ratio.numerator );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1011
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1012 fprintf( stderr, " increment sequence:\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1013 " " );
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1014 for( i = 0; i < Data->filter.ratio.denominator; i++ )
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1015 fprintf( stderr, "%1d ", Data->filter.incr[i] );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1016
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1017 fprintf( stderr, "\n" );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1018 }
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1019 else
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1020 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1021 fprintf( stderr, "No Variable Rate Converter\n" );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1022 }
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1023 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1024
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1025
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1026 int Sound_BuildAudioCVT(Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	1027 Uint16 src_format, Uint8 src_channels, int src_rate,
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1028 Uint16 dst_format, Uint8 dst_channels, int dst_rate, Uint32 dst_size )
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1029 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1030 SDL_AudioSpec src, dst;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1031 int ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1032
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1033 fprintf (stderr,
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1034 "Sound_BuildAudioCVT():\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1035 "-----------------------------\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1036 "format: %s -> %s\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1037 "channels: %6d -> %6d\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1038 "rate: %6d -> %6d\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1039 "size: don't care -> %#7x\n\n",
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1040 fmt_to_str (src_format), fmt_to_str (dst_format),
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1041 src_channels, dst_channels,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1042 src_rate, dst_rate,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1043 dst_size );
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1044
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1045 src.format = src_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1046 src.channels = src_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1047 src.freq = src_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1048
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1049 dst.format = dst_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1050 dst.channels = dst_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1051 dst.freq = dst_rate;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1052 dst.size = dst_size;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1053
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1054 ret = BuildAudioCVT( Data, src, dst );
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1055 Data->needed = 1;
347 778cee61e1be Mono-to-stereo fixes, more fprintf debugging output. Ryan C. Gordon <icculus@icculus.org> parents: 342 diff changeset	1056
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1057 show_AudioCVT( Data );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1058 fprintf (stderr, "\n"
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1059 "return value: %d \n\n\n", ret );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1060 return ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1061 }

Mercurial > SDL_sound_CoreAudio

annotate alt_audio_convert.c @ 403:b1e511c879d1