SDL_sound_CoreAudio: alt_audio

annotate alt_audio_convert.c @ 394:b495d05a88b3

Updated.

author	Ryan C. Gordon <icculus@icculus.org>
date	Thu, 11 Jul 2002 04:33:17 +0000
parents	44ed8bdeba74
children	b1e511c879d1

rev	line source
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: 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
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	46 /* some macros for "parsing" format */
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)
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53
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 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	56 /* 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	57 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	58 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	59 operation mode, two layouts for the RateConverterBuffer.inbuffer are
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	60 possible:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	61
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	62 in the Loop Mode:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	63 ... 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	64 \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	65 linp, finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	66
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	67 in the Single Mode (non Loop):
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	68 ... 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	69 \| \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	70 linp finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	71
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	72 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	73 filters in the rate Converters.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	74
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	75 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	76 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	77 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	78 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	79 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	80 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	81 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	82 movement is stored in flength, always positive.
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	83
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	84 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	85 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	86 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	87 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	88 the movement is stored in clength.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	89
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	90 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	91 flength, but in reverse order.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	92
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	93 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	94 on direction of the rate conversion.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	95
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	96 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	97 are refering to the input buffer */
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	98
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	99 typedef struct
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	100 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	101 Sint16 inbuffer[24*_fsize];
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	102 Sint16 finp, cinp, *linp;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	103 Sint16 *buffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	104 int flength, clength, llength;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	105 } RateConverterBuffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	106
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 /* Mono (1 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109 #define Suffix(x) x##1
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	111 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 /* Stereo (2 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 #define Suffix(x) x##2
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	118
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	119 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	120 static int ConvertAudio( Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	121 Uint8* buffer, int length, int mode )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	122 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	123 AdapterC Temp;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	124 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	125
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	126 /* Make sure there's a converter */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	127 if( Data == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	128 SDL_SetError("No converter given");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	129 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	130 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	131
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	132 /* Make sure there's data to convert */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	133 if( buffer == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	134 SDL_SetError("No buffer allocated for conversion");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	135 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	136 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	137
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	138 /* Set up the conversion and go! */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	139 Temp.buffer = buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	140 Temp.mode = mode;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	141 Temp.filter = &Data->filter;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	142
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	143 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	144 length = (*Data->adapter[i])( Temp, length);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	145
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	146 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	147 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	148
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	149 int Sound_ConvertAudio( Sound_AudioCVT *Data )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	151 int length;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	152 /* !!! FIXME: Try the looping stuff under certain circumstances? --ryan. */
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	153 length = ConvertAudio( Data, Data->buf, Data->len, 12 );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	154 Data->len_cvt = length;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	155 return length;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	156 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	157
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	158
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	159 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	160 static int expand8BitTo16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	161 {
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	162 /* !!! Fixme: get rid of <<8 through pointer manipulation --frank */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	163 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	164 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	165 Uint16* buffer = (Uint16*)Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	166 for( i = length - 1; i >= 0; i-- )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	167 buffer[i] = inp[i]<<8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	168 return 2*length;
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 static int expand8BitTo16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	172 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	173 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	174 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	175 Uint16* buffer = (Uint16*)Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	176 for( i = length - 1; i >= 0; i--)
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	177 buffer[i] = inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	178 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180
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 expand16BitToFloat( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	184 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	185 Sint16* inp = (Sint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	186 float* buffer = (float*)Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	187 for( i = length>>1 - 1; i >= 0; i-- )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	188 buffer[i] = inp[i]*(1./32767);
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 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	193 static int swapBytes( 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 /*
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	196 * !!! FIXME !!!
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	197 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	198 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	199 * Use the faster SDL-Macros to swap
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	200 * - Frank
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	201 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	202
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	203 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	204 Uint16 a,b;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	205 Uint16* buffer = (Uint16*) Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	206 for( i = length>>1; i >= 0; i-- )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	207 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	208 a = b = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	209 buffer[i] = ( a << 8 ) \| ( b >> 8 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	210 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	211 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	214 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	215 static int cutFloatTo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	216 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	217 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	218 float* inp = (float*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	219 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	220 length>>=2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	221 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	222 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	223 if( inp[i] > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	224 buffer[i] = 32767;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	225 else if( inp[i] < -1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	226 buffer[i] = -32768;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	227 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	228 buffer[i] = 32767 * inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	229 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	230 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	231 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	232
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 static int cut16BitSysTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	235 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	236 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	237 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	238 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	239 length >>= 1;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	240 /* !!! FIXME: Get rid of the >>8 */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	241 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	242 buffer[i] = inp[i]>>8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	243 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	244 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	245
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	246 static int cut16BitWrongTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	247 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	248 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	249 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	250 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	251 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	252 for( i = 0; i < length; i++ )
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	253 buffer[i] = inp[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	254 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257 /-------------------------------------------------------------------------/
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	258 /* poor mans mmx :-) */
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	259 static int changeSigned( AdapterC Data, int length, Uint32 XOR )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	261 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	262 Uint32* buffer = (Uint32*) Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	263 for( i = ( length - 1 ) >> 2; i >= 0; i-- )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	264 buffer[i] ^= XOR;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	265 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	266 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	267
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	268 static int changeSigned16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	269 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	270 return changeSigned( Data, length, 0x80008000 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	271 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	272
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	273 static int changeSigned16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	274 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	275 return changeSigned( Data, length, 0x00800080 );
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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	278 static int changeSigned8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	279 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	280 return changeSigned( Data, length, 0x80808080 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	281 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	282
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	283 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	284 static int convertStereoToMonoS16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	285 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	286 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	287 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	288 Sint16* src = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	289 length >>= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	290 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	291 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	292 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	293 }
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 static int convertStereoToMonoU16Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	296 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	297 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	298 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	299 Uint16* src = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	300 length >>= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	301 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	302 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	303 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	304 }
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 static int convertStereoToMonoS8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	307 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	308 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	309 Sint8* buffer = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	310 Sint8* src = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	311 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	312 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	313 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	314 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	315 }
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 static int convertStereoToMonoU8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	318 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	319 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	320 Uint8* buffer = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	321 Uint8* src = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	322 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	323 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	324 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	325 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	326 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	327
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	328 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	329 static int convertMonoToStereo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	330 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	331 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	332 Uint16* buffer = (Uint16*) Data.buffer;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	333 Uint16* dst = (Uint16*)Data.buffer + length - 2;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	334 for( i = length>>1 - 1; i >= 0; i--, dst-=2 )
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	335 dst[0] = dst[1] = buffer[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	336 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	337 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	338
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	339 static int convertMonoToStereo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	340 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	341 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	342 Uint8* buffer = Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	343 Uint8* dst = (Uint8*)Data.buffer + length - 2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	344 for( i = length - 1; i >= 0; i--, dst-=2 )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	345 dst[0] = dst[1] = buffer[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	346 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	347 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	348
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	349 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	350 static int minus5dB( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	351 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	352 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	353 Sint16* buffer = (Sint16*) Data.buffer;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	354 for(i = length>>1 - 1; i >= 0; i-- )
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	355 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	356 return length;
338 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
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	359 /-------------------------------------------------------------------------/
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	360 enum RateConverterType{
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	361 dcrsRate = -1,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	362 incrsRate = 0,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	363 hlfRate = 1,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	364 dblRate = 2
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	365 };
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	366
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	367
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	368 const Fraction Half = {1, 2};
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	369 const Fraction Double = {2, 1};
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	370
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	371 static void initStraigthBuffer( RateConverterBuffer *rcb,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	372 int length, Fraction r, int dir )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	373 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	374 int i, size, minsize;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	375 size = 8 * _fsize;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	376 minsize = min( size, length );
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	377
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	378 for( i = 0; i < minsize; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	379 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	380 rcb->inbuffer[i] = rcb->buffer[length-size+i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	381 rcb->inbuffer[i+size] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	382 rcb->inbuffer[i+2*size] = rcb->buffer[i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	383 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	384 for( ; i < size; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	385 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	386 rcb->inbuffer[i] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	387 rcb->inbuffer[i+size] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	388 rcb->inbuffer[i+2*size] = 0;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	389 }
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 length = max( length, size );
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	392 rcb->flength = rcb->llength = size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	393 rcb->clength = length - size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	394
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	395 if( dir )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	396 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	397 rcb->finp = rcb->inbuffer + 5 * size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	398 rcb->cinp = rcb->buffer + length - size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	399 rcb->linp = rcb->inbuffer + 3*size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	400 rcb->buffer += r.denominator * ( length + size )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	401 / r.numerator;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	402 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	403 else
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	404 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	405 rcb->finp = rcb->inbuffer + size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	406 rcb->cinp = rcb->buffer + size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	407 rcb->linp = rcb->inbuffer + 3*size/2;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	408 }
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 static void initLoopBuffer( RateConverterBuffer *rcb,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	412 int length, Fraction r, int dir )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	413 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	414 /* !!!FIXME: modulo length, take scale into account,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	415 check against the Straight part -frank */
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	416 int i, size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	417 size = 8 * _fsize;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	418 for( i = 0; i < size; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	419 {
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	420 rcb->inbuffer[i] = rcb->buffer[length-size+i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	421 rcb->inbuffer[i+size] = rcb->buffer[i];
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	422 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	423 rcb->finp = rcb->linp = rcb->inbuffer + size;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	424 if( size < 0 )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	425 rcb->buffer += r.numerator * ( length + 2 * size )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	426 / r.denominator;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	427 }
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	428
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	429 static void initRateConverterBuffer( RateConverterBuffer *rcb,
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	430 AdapterC* Data, int length, enum RateConverterType typ )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	431 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	432 int size, minsize, dir;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	433 Fraction Ratio[] = { {0,0}, {2,1}, {1,2} };
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	434
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	435 Ratio[incrsRate] = Data->filter->ratio;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	436 dir = ~typ&1;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	437 length >>= 1;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	438 rcb->buffer = (Sint16*)( Data->buffer );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	439
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	440 if( Data->mode & SDL_SOUND_Loop )
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	441 initLoopBuffer( rcb, length, Ratio[typ], dir );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	442 else
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	443 initStraigthBuffer( rcb, length, Ratio[typ], dir );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	444 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	445
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	446 static void nextRateConverterBuffer( RateConverterBuffer *rcb )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	447 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	448 rcb->buffer++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	449 rcb->finp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	450 rcb->cinp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	451 rcb->linp++;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	452 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	453
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	454 typedef Sint16* (RateConverter)( Sint16, Sint16, int, VarFilter, int*);
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	455 static int doRateConversion( RateConverterBuffer* rcb,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	456 RateConverter ffp, VarFilter* filter )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	457 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	458 int pos = 0;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	459 Sint16 *outp;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	460 outp = rcb->buffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	461
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	462 outp = (*ffp)( outp, rcb->finp, rcb->flength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	463 outp = (*ffp)( outp, rcb->cinp, rcb->clength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	464 outp = (*ffp)( outp, rcb->linp, rcb->llength, filter, &pos );
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 /-------------------------------------------------------------------------/
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	470 /*
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	471 * !!! FIXME !!!
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	472 *
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	473 * The doubleRate filter is half as large as the halfRate one! Frank
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	474 */
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	475
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	476
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	477 static int doubleRateMono( 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;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	480 initRateConverterBuffer( &rcb, &Data, length, dblRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	481 return doRateConversion( &rcb, doubleRate1, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	482 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	483
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	484 static int doubleRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	485 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	486 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	487 initRateConverterBuffer( &rcb, &Data, length, dblRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	488 doRateConversion( &rcb, doubleRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	489 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	490 return 2 + doRateConversion( &rcb, doubleRate2, NULL );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	491 }
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 halfRateMono( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	495 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	496 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	497 initRateConverterBuffer( &rcb, &Data, length, hlfRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	498 return doRateConversion( &rcb, halfRate1, NULL );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	499 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	500
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	501 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	502 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	503 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	504 initRateConverterBuffer( &rcb, &Data, length, hlfRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	505 doRateConversion( &rcb, halfRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	506 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	507 return 2 + doRateConversion( &rcb, halfRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	508 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	509
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	510 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	511 static int increaseRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	512 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	513 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	514 initRateConverterBuffer( &rcb, &Data, length, incrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	515 return doRateConversion( &rcb, increaseRate1, Data.filter );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	516 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	517
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	518 static int increaseRateStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	519 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	520 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	521 initRateConverterBuffer( &rcb, &Data, length, incrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	522 doRateConversion( &rcb, increaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	523 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	524 return 2 + doRateConversion( &rcb, increaseRate2, Data.filter );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	525 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	526
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	527 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	528 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	529 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	530 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	531 initRateConverterBuffer( &rcb, &Data, length, dcrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	532 return doRateConversion( &rcb, decreaseRate1, Data.filter );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	533 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	534
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	535 static int decreaseRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	536 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	537 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	538 initRateConverterBuffer( &rcb, &Data, length, dcrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	539 doRateConversion( &rcb, decreaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	540 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	541 return doRateConversion( &rcb, decreaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	542 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	543
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	544 /-------------------------------------------------------------------------/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	545 static int padSilence( AdapterC Data, int length )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	546 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	547 Uint32 zero, *buffer;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	548 int i, mask = 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	549
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	550 buffer = (Uint32*) ( Data.buffer + length );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	551 if( Data.mode != SDL_SOUND_Loop )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	552 mask = Data.filter->mask;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	553 length = mask - ( ( length - 1 ) & mask );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	554
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	555 for( i = 0; i < length>>2; i++ )
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	556 buffer[i] = zero;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	557 for( ; i < length; i++ )
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	558 ((Uint8)buffer)[i] = ((Uint8)&zero)[i&3];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	559
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	560 return length + ((Uint8*)buffer - Data.buffer);
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	561 }
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	562
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	563 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	564 /* 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	565 static Fraction findFraction( float Value )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	566 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	567 const Sint8 frac[95]={
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	568 2, -1, /* /1 */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	569 1, 3, -1, /* /2 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	570 2, 4, 5, -1, /* /3 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	571 3, 5, 7, -1, /* /4 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	572 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	573 5, 7, 11, -1, /* /6 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	574 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	575 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	576 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	577 7, 9, 11, 13, -1, /* /10 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	578 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	579 7, 11, 13, -1, /* /12 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	580 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	581 9, 11, 13, 15, -1, /* /14 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	582 8, 11, 13, 14, 16, -1, /* /15 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	583 9, 11, 13, 15 }; /* /16 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	584
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	585
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	586 Fraction Result = {0,0};
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	587 int i,num,den=1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	588
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	589 float RelErr, BestErr = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	590 if( Value < 31/64. \|\| Value > 64/31. ) return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	591
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	592 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	593 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	594 num = frac[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	595 if( num < 0 ) den++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	596 RelErr = Value * num / den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	597 RelErr = min( RelErr, 1/RelErr );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	598 if( RelErr > BestErr )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	599 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	600 BestErr = RelErr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	601 Result.denominator = den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	602 Result.numerator = num;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	603 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	604 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	605 return Result;
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
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	608 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	609 static float sinc( float x )
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 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	612 else return sin(x)/x;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	613 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	614
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	615 static float calculateVarFilter( Sint16* dst,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	616 float Ratio, float phase, float scale )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	617 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	618 const Uint16 KaiserWindow7[]= {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	619 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	620 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	621 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	622 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	623 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	624 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	625 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	626 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	627 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	628 float w;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	629 const float fg = -.018 + .5 * Ratio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	630 const float omega = 2 * M_PI * fg;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	631 fprintf( stderr, " phase: %6g \n", phase );
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	632 phase += 63;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	633 for( i = 0; i < 64; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	634 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	635 w = scale * ( KaiserWindow7[i] * ( i + 1 ));
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	636 dst[i] = w * sinc( omega * (i-phase) );
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	637 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	638 }
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	639 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	640 return fg;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	641 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	642
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	643 static Fraction setupVarFilter( VarFilter* filter, float Ratio )
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	644 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	645 int pos,n,d, incr, phase = 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	646 float Scale, rd, fg;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	647 Fraction IRatio;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	648
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	649 IRatio = findFraction( Ratio );
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	650 // Scale = Ratio < 1. ? 0.0364733 : 0.0211952;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	651 Scale = 0.0084778;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	652 Ratio = min( Ratio, 0.97 );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	653
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	654 filter->ratio = IRatio;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	655 n = IRatio.numerator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	656 d = IRatio.denominator;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	657 rd = 1. / d;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	658
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	659 fprintf( stderr, "Filter:\n" );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	660
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	661 for( pos = 0; pos < d; pos++ )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	662 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	663 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	664 phase += n;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	665 filter->incr[pos] = phase / d;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	666 phase %= d;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	667 }
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	668 fprintf( stderr, " fg: %6g\n\n", fg );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	669 /* !!!FIXME: get rid of the inversion -Frank*/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	670 IRatio.numerator = d;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	671 IRatio.denominator = n;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	672 return IRatio;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	673 }
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	674 /-------------------------------------------------------------------------/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	675 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	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 double ratio = f.numerator / (double) f.denominator;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	679 Data->len_ratio *= ratio;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	680 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	681 Data->add = ratio * (Data->add + add);
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	682 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	683 }
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	684
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	685 static void initSize( Sound_AudioCVT *Data )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	686 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	687 Data->len_ratio = 1.;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	688 Data->len_mult = 1;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	689 Data->add = 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	690 Data->len_add = 0;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	691 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	692
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	693 /-------------------------------------------------------------------------/
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	694 const Adapter doubleRate[2] = { doubleRateMono, doubleRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	695 const Adapter halfRate[2] = { halfRateMono, halfRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	696 const Adapter increaseRate[2] = { increaseRateMono, increaseRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	697 const Adapter decreaseRate[2] = { decreaseRateMono, decreaseRateStereo };
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	698
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	699 static void createRateConverter( Sound_AudioCVT Data, int fip,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	700 int SrcRate, int DestRate, int Channel )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	701 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	702 Fraction f;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	703 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	704 int VarPos = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	705 float Ratio = DestRate;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	706 int c = Channel - 1;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	707 *fip = -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	708
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	709
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	710 if( SrcRate < 1 \|\| SrcRate > 1<<18 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	711 DestRate < 1 \|\| DestRate > 1<<18 ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	712 Ratio /= SrcRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	713
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	714 if( Ratio > 1.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	715 VarPos = filter_index++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	716 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	717 Data->adapter[filter_index++] = minus5dB;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	718
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	719 while( Ratio > 64./31.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	720 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	721 Ratio /= 2.;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	722 Data->adapter[filter_index++] = doubleRate[c];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	723 adjustSize( Data, _fsize, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	724 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	725
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	726 while( Ratio < 31./64. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	727 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	728 Ratio *= 2;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	729 Data->adapter[filter_index++] = halfRate[c];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	730 adjustSize( Data, _fsize, Half );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	731 }
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 if( Ratio > 1. )
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[VarPos] = increaseRate[c];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	736 f = setupVarFilter( &Data->filter, Ratio );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	737 adjustSize( Data, _fsize, 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 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	740 {
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	741 Data->adapter[filter_index++] = decreaseRate[c];
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	742 f = setupVarFilter( &Data->filter, Ratio );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	743 adjustSize( Data, _fsize, f );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	744 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	745 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	746 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	747
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	748 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	749 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	750 SDL_AudioSpec src, SDL_AudioSpec dst )
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 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	753
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	754 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	755 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	756 adjustSize( Data, 0, Half );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	757
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	758 if( !IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	759 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	760
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	761 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	762 Data->adapter[filter_index++] = convertStereoToMonoS16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	763 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	764 Data->adapter[filter_index++] = convertStereoToMonoU16Bit;
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_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	767 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	768 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	769 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	770 Data->adapter[filter_index++] = swapBytes;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	771
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	772 if( IS_SIGNED(src) != IS_SIGNED(dst) )
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( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	775 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	776 else
368 84d6c604eaa9 Fixes to interface with SDL_sound correctly by Torbjorn. Ryan C. Gordon <icculus@icculus.org> parents: 366 diff changeset	777 Data->adapter[filter_index++] = changeSigned16BitWrong;
360 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 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	781 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	782 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	783 Data->adapter[filter_index++] = convertMonoToStereo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	784 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	785
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	786 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	787 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	788
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	789 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	790 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	791 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	792 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	793 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	794 if( IS_16BIT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	795 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	796 adjustSize( Data, 0, Half );
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( IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	799 Data->adapter[filter_index++] = cut16BitSysTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	800 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	801 Data->adapter[filter_index++] = cut16BitWrongTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	802 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	803
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	804 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	805 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	806 adjustSize( Data, 0, Half );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	807
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	808 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	809 Data->adapter[filter_index++] = convertStereoToMonoS8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	810 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	811 Data->adapter[filter_index++] = convertStereoToMonoU8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	812 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	813
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	814 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	815 Data->adapter[filter_index++] = changeSigned8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	816
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	817 if( src.channels == 1 && dst.channels == 2 )
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 Data->adapter[filter_index++] = convertMonoToStereo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	821 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	822
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	823 if( !IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	824 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	825 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	826 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	827 Data->adapter[filter_index++] = expand8BitTo16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	828 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	829 Data->adapter[filter_index++] = expand8BitTo16BitWrong;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	830 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	831
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	832 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	833 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	834
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	835 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	836 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	837 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	838 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	839 int filter_index = *fip;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	840
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	841 if( IS_FLOAT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	842 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	843 Data->adapter[filter_index++] = cutFloatTo16Bit;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	844 adjustSize( Data, 0, Half );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	845 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	846
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	847 if( IS_8BIT(src) \|\| IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	848 createFormatConverter8Bit( Data, &filter_index, src, dst);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	849 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	850 createFormatConverter16Bit( Data, &filter_index, src, dst);
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	851
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	852 if( IS_FLOAT(dst) )
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 Data->adapter[filter_index++] = expand16BitToFloat;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	855 adjustSize( Data, 0, Double );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	856 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	857
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	858 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	859 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	860
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	861 /-------------------------------------------------------------------------/
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	862 Uint32 getSilenceValue( Uint16 format )
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 const static float fzero[] = {0.0000001};
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	865 switch( format )
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	866 {
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	867 case 0x0020: return (Uint32) fzero;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	868 default: ;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	869 }
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	870 return 0;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	871 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	872
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	873 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	874 int BuildAudioCVT( Sound_AudioCVT *Data,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	875 SDL_AudioSpec src, SDL_AudioSpec dst )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	876 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	877 SDL_AudioSpec intrm;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	878 int filter_index = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	879
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	880 if( Data == NULL ) return -1;
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	881 if( dst.size < 8 ) return -1;
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	882
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	883 initSize( Data );
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	884 Data->filter.ratio.denominator = 0;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	885 Data->filter.zero = getSilenceValue( dst.format );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	886 Data->filter.mask = dst.size - 1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	887
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	888
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	889
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	890 /* Check channels */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	891 if( src.channels < 1 \|\| src.channels > 2 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	892 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	893
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	894 /* 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	895 if( src.freq == dst.freq )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	896 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	897 createFormatConverter( Data, &filter_index, src, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	898 goto sucess_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	899 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	900
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	901 /* Convert to signed 16Bit System-Endian */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	902 intrm.format = AUDIO_S16SYS;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	903 intrm.channels = min( src.channels, dst.channels );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	904 createFormatConverter( Data, &filter_index, src, intrm );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	905
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	906 /* Do rate conversion */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	907 if( src.channels == 2 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	908 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	909 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	910 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	911 /* propagate error */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	912 if( filter_index < 0 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	913
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	914 /* Convert to final format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	915 createFormatConverter( Data, &filter_index, intrm, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	916
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	917 /* Set up the filter information */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	918 sucess_exit:
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	919 Data->adapter[filter_index++] = padSilence;
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	920 Data->adapter[filter_index] = NULL;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	921 /* !!! 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	922 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	923 return 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	924
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	925 error_exit:
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	926 /* !!! 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	927 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	928 Data->adapter[0] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	929 return -1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	930 }
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	931
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	932 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	933 static char *fmt_to_str(Uint16 fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	934 {
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	935 switch (fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	936 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	937 case AUDIO_U8: return " U8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	938 case AUDIO_S8: return " S8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	939 case AUDIO_U16MSB: return "U16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	940 case AUDIO_S16MSB: return "S16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	941 case AUDIO_U16LSB: return "U16LSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	942 case AUDIO_S16LSB: return "S16LSB";
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	943 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	944 return "??????";
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	945 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	946
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	947 #define AdapterDesc(x) { x, #x }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	948
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	949 static void show_AudioCVT( Sound_AudioCVT *Data )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	950 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	951 int i,j;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	952 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	953 AdapterDescription[] = {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	954 AdapterDesc(expand8BitTo16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	955 AdapterDesc(expand8BitTo16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	956 AdapterDesc(expand16BitToFloat),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	957 AdapterDesc(swapBytes),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	958 AdapterDesc(cut16BitSysTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	959 AdapterDesc(cut16BitWrongTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	960 AdapterDesc(cutFloatTo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	961 AdapterDesc(changeSigned16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	962 AdapterDesc(changeSigned16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	963 AdapterDesc(changeSigned8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	964 AdapterDesc(convertStereoToMonoS16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	965 AdapterDesc(convertStereoToMonoU16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	966 AdapterDesc(convertStereoToMonoS8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	967 AdapterDesc(convertStereoToMonoU8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	968 AdapterDesc(convertMonoToStereo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	969 AdapterDesc(convertMonoToStereo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	970 AdapterDesc(minus5dB),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	971 AdapterDesc(doubleRateMono),
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	972 AdapterDesc(doubleRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	973 AdapterDesc(halfRateMono),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	974 AdapterDesc(halfRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	975 AdapterDesc(increaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	976 AdapterDesc(increaseRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	977 AdapterDesc(decreaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	978 AdapterDesc(decreaseRateStereo),
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	979 AdapterDesc(padSilence),
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	980 { NULL, "----------NULL-----------\n" }
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	981 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	982
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	983 fprintf( stderr, "Sound_AudioCVT:\n" );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	984 fprintf( stderr, " needed: %8d\n", Data->needed );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	985 fprintf( stderr, " add: %8g\n", Data->add );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	986 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	987 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	988 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	989 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	990 fprintf( stderr, "\n" );
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	991
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	992 fprintf( stderr, "Adapter List: \n" );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	993 for( i = 0; i < 32; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	994 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	995 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	996 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	997 if( Data->adapter[i] == AdapterDescription[j].adapter )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	998 {
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	999 fprintf( stderr, " %s \n", AdapterDescription[j].name );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1000 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	1001 goto cont;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1002 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1003 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1004 fprintf( stderr, " Error: unknown adapter\n" );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1005
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1006 cont:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1007 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1008 fprintf( stderr, " Error: NULL adapter missing\n" );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1009 sucess_exit:
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1010 if( Data->filter.ratio.denominator )
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1011 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1012 fprintf( stderr, "Variable Rate Converter:\n"
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1013 " numerator: %3d\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1014 " denominator: %3d\n",
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1015 Data->filter.ratio.denominator,
44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1016 Data->filter.ratio.numerator );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1017
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1018 fprintf( stderr, " increment sequence:\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1019 " " );
380 44ed8bdeba74 More fixes from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 373 diff changeset	1020 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	1021 fprintf( stderr, "%1d ", Data->filter.incr[i] );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1022
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1023 fprintf( stderr, "\n" );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1024 }
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1025 else
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1026 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1027 fprintf( stderr, "No Variable Rate Converter\n" );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	1028 }
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1029 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1030
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1031
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1032 int Sound_BuildAudioCVT(Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	1033 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	1034 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	1035 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1036 SDL_AudioSpec src, dst;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1037 int ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1038
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1039 fprintf (stderr,
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1040 "Sound_BuildAudioCVT():\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1041 "-----------------------------\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1042 "format: %s -> %s\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1043 "channels: %6d -> %6d\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1044 "rate: %6d -> %6d\n"
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1045 "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	1046 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	1047 src_channels, dst_channels,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1048 src_rate, dst_rate,
24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1049 dst_size );
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1050
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1051 src.format = src_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1052 src.channels = src_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1053 src.freq = src_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1054
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1055 dst.format = dst_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1056 dst.channels = dst_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1057 dst.freq = dst_rate;
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1058 dst.size = dst_size;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1059
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1060 ret = BuildAudioCVT( Data, src, dst );
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1061 Data->needed = 1;
347 778cee61e1be Mono-to-stereo fixes, more fprintf debugging output. Ryan C. Gordon <icculus@icculus.org> parents: 342 diff changeset	1062
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1063 show_AudioCVT( Data );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	1064 fprintf (stderr, "\n"
373 24a610dfbbfd More altcvt updates from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 371 diff changeset	1065 "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	1066 return ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	1067 }

Mercurial > SDL_sound_CoreAudio

annotate alt_audio_convert.c @ 394:b495d05a88b3