SDL_sound_CoreAudio: alt_audio

annotate alt_audio_convert.c @ 372:ee0678efd4a3

Updated.

author	Ryan C. Gordon <icculus@icculus.org>
date	Tue, 25 Jun 2002 17:15:29 +0000
parents	1b463ef9bcc2
children	24a610dfbbfd

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
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	37 #ifndef abs
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	38 #define abs(x) ( ((x) > (0)) ? (x) : -(x) )
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	39 #endif
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	40
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	41
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	42 /* some macros for "parsing" format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	43
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	44 #define IS_8BIT(x) ((x).format & 0x0008)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	45 #define IS_16BIT(x) ((x).format & 0x0010)
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	46 #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	47 #define IS_SIGNED(x) ((x).format & 0x8000)
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	48 #define IS_SYSENDIAN(x) ((~AUDIO_U16SYS ^ (x).format) & 0x1000)
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	51 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	52 /* 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	53 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	54 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	55 operation mode, two layouts for the RateConverterBuffer.inbuffer are
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	56 possible:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	57
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	58 in the Loop Mode:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	59 ... 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	60 \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	61 linp, finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	62
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	63 in the Single Mode (non Loop):
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	64 ... 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	65 \| \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	66 linp finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	67
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	68 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	69 filters in the rate Converters.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	70
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	71 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	72 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	73 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	74 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	75 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	76 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	77 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	78 movement is stored in flength, always positive.
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	79
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	80 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	81 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	82 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	83 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	84 the movement is stored in clength.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	85
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	86 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	87 flength, but in reverse order.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	88
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	89 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	90 on direction of the rate conversion.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	91
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	92 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	93 are refering to the input buffer */
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	94
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	95 typedef struct
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	96 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	97 Sint16 inbuffer[24*_fsize];
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	98 Sint16 finp, cinp, *linp;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	99 Sint16 *buffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	100 int flength, clength, llength;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	101 } RateConverterBuffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	102
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 /* Mono (1 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105 #define Suffix(x) x##1
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109 /* Stereo (2 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110 #define Suffix(x) x##2
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	111 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	114
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	115 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	116 static int ConvertAudio( Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	117 Uint8* buffer, int length, int mode )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	118 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	119 AdapterC Temp;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	120 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	121
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	122 /* Make sure there's a converter */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	123 if( Data == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	124 SDL_SetError("No converter given");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	125 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	126 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	128 /* Make sure there's data to convert */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	129 if( buffer == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	130 SDL_SetError("No buffer allocated for conversion");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	131 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	132 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	133
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	134 /* Set up the conversion and go! */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	135 Temp.buffer = buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	136 Temp.mode = mode;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	137 Temp.filter = &Data->filter;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	138
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	139 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	140 length = (*Data->adapter[i])( Temp, length);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	141
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	142 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	143 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	144
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	145 int Sound_ConvertAudio( Sound_AudioCVT *Data )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	146 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	147 int length;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	148 /* !!! FIXME: Try the looping stuff under certain circumstances? --ryan. */
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	149 length = ConvertAudio( Data, Data->buf, Data->len, 0 );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	150 Data->len_cvt = length;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	151 return length;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	152 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	153
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	154
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	155 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	156 static int expand8BitTo16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	157 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	158 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	159 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	160 Uint16* buffer = (Uint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	161 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	162 buffer[i] = inp[i]<<8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	163 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	164 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	166 static int expand8BitTo16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	167 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	168 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	169 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	170 Uint16* buffer = (Uint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	171 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	172 buffer[i] = inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	173 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	177 static int expand16BitToFloat( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	179 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	180 Sint16* inp = (Sint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	181 float* buffer = (float*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	182 for( i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	183 buffer[i] = inp[i]*(1./32767);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	184 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	186
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	188 static int swapBytes( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	190 /*
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	191 * !!! FIXME !!!
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	192 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	193 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	194 * Use the faster SDL-Macros to swap
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	195 * - Frank
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	196 */
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 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	199 Uint16 a,b;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	200 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	201 for( i = length>>1; i --; )
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 a = b = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	204 buffer[i] = ( a << 8 ) \| ( b >> 8 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	205 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	206 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	209 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	210 static int cutFloatTo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	212 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	213 float* inp = (float*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	214 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	215 length>>=2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	216 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	217 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	218 if( inp[i] > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	219 buffer[i] = 32767;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	220 else if( inp[i] < -1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	221 buffer[i] = -32768;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	222 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	223 buffer[i] = 32767 * inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	224 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	225 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	226 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	227
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	228 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	229 static int cut16BitSysTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	230 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	231 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	232 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	233 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	234 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	235 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	236 buffer[i] = inp[i]>>8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	237 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	238 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	239
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	240 static int cut16BitWrongTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	241 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	242 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	243 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	244 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	245 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	246 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	247 buffer[i] = inp[i] & 0xff;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	248 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	249 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	250
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	251 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	252 static int changeSigned( AdapterC Data, int length, int XOR )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	254 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	255 Uint32* buffer = (Uint32*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	256 for( i = length>>2; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	257 buffer[i] ^= XOR;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	258 for( i = 4*(length>>2); i < length; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	259 ((Uint8)buffer)[i] ^= ((Uint8)&XOR)[i&3];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	260 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	261 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	262
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	263 static int changeSigned16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	264 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	265 return changeSigned( Data, length, 0x80008000 );
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 changeSigned16BitWrong( 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, 0x00800080 );
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 changeSigned8Bit( 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, 0x80808080 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	276 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	277
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	278 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	279 static int convertStereoToMonoS16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	280 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	281 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	282 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	283 Sint16* src = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	284 length >>= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	285 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	286 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	287 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	288 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	289
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	290 static int convertStereoToMonoU16Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	291 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	292 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	293 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	294 Uint16* src = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	295 length >>= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	296 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	297 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	298 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	299 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	300
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	301 static int convertStereoToMonoS8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	302 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	303 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	304 Sint8* buffer = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	305 Sint8* src = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	306 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	307 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	308 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	309 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	310 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	311
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	312 static int convertStereoToMonoU8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	313 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	314 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	315 Uint8* buffer = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	316 Uint8* src = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	317 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	318 for( i = 0; i < length; i++, src+=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	319 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	320 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	321 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	322
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	323 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	324 static int convertMonoToStereo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	325 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	326 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	327 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	328 Uint16* dst = (Uint16*)Data.buffer + length;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	329 for( i = length>>1; i--; dst-=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	330 dst[-1] = dst[-2] = buffer[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	331 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	332 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	333
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	334 static int convertMonoToStereo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	335 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	336 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	337 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	338 Uint8* dst = Data.buffer + 2*length;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	339 for( i = length; i--; dst-=2 )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	340 dst[-1] = dst[-2] = buffer[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	341 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	342 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	343
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	344 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	345 static int minus5dB( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	346 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	347 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	348 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	349 for(i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	350 buffer[i]= 38084 * buffer[i] >> 16;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	351 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	352 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	353
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	354 /-------------------------------------------------------------------------/
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	355 enum RateConverterType{
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	356 dcrsRate = 0,
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	357 incrsRate = 1,
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	358 hlfRate = 2,
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	359 dblRate = 3
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	360 };
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	361
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	362 static void initRateConverterBuffer( RateConverterBuffer *rcb,
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	363 AdapterC* Data, int length, enum RateConverterType typ )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	364 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	365 int size, minsize, dir;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	366 int den[] = { 0, 0, 1, 2};
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	367 int num[] = { 0, 0, 2, 1};
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	368 int i;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	369
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	370 den[incrsRate] = Data->filter->denominator;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	371 num[incrsRate] = Data->filter->numerator;
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	372
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	373 size = 8 * _fsize;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	374 dir = typ&1;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	375 length >>= 1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	376 minsize = min( length, size );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	377
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	378 rcb->buffer = (Sint16*)( Data->buffer );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	379
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	380 if( Data->mode & SDL_AI_Loop )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	381 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	382 // !!!FIXME: modulo length, take scale into account,
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	383 // check against the 'else' part
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	384 for( i = 0; i < size; i++ )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	385 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	386 rcb->inbuffer[i] = rcb->buffer[length-size+i];
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	387 rcb->inbuffer[i+size] = rcb->buffer[i];
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	388 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	389 rcb->finp = rcb->linp = rcb->inbuffer + size;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	390 if( size < 0 )
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	391 rcb->buffer += num[typ] * ( length + 2 * size ) / den[typ];
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	392 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	393 else
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	394 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	395 for( i = 0; i < minsize; i++ )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	396 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	397 rcb->inbuffer[i] = rcb->buffer[length-size+i];
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	398 rcb->inbuffer[i+size] = 0;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	399 rcb->inbuffer[i+2*size] = rcb->buffer[i];
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	400 }
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	401 for( i = 0; i < size; i++ )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	402 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	403 rcb->inbuffer[i] = 0;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	404 rcb->inbuffer[i+size] = 0;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	405 rcb->inbuffer[i+2*size] = 0;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	406 }
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	407 rcb->flength = rcb->llength = size/2 + minsize/2;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	408 rcb->clength = length - minsize;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	409
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	410 if( dir )
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	411 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	412 rcb->finp = rcb->inbuffer + 2 * size + minsize/2;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	413 rcb->cinp = rcb->buffer + length - minsize/2;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	414 rcb->linp = rcb->inbuffer + size + minsize/2;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	415 rcb->buffer += den[typ] * ( length + minsize ) / num[typ];
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	416 }
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	417 else
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	418 {
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	419 rcb->finp = rcb->inbuffer + size/2;
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	420 rcb->cinp = rcb->buffer + size/2;
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	421 rcb->linp = rcb->inbuffer + 3*size/2;
eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	422 }
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	423 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	424 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	425
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	426 static void nextRateConverterBuffer( RateConverterBuffer *rcb )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	427 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	428 rcb->buffer++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	429 rcb->finp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	430 rcb->cinp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	431 rcb->linp++;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	432 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	433
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	434 typedef Sint16* (RateConverter)( Sint16, Sint16, int, VarFilter, int*);
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	435 static int doRateConversion( RateConverterBuffer* rcb,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	436 RateConverter ffp, VarFilter* filter )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	437 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	438 int pos = 0;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	439 Sint16 *outp;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	440 outp = rcb->buffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	441
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	442 outp = (*ffp)( outp, rcb->finp, rcb->flength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	443 outp = (*ffp)( outp, rcb->cinp, rcb->clength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	444 outp = (*ffp)( outp, rcb->linp, rcb->llength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	445 return 2 * abs( rcb->buffer - outp );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	446 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	447
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	448
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	449 /-------------------------------------------------------------------------/
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	450 /*
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	451 * !!! FIXME !!!
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	452 *
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	453 * 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	454 */
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	455
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	456
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	457 static int doubleRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	458 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	459 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	460 initRateConverterBuffer( &rcb, &Data, length, dblRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	461 return doRateConversion( &rcb, doubleRate1, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	462 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	463
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	464 static int doubleRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	465 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	466 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	467 initRateConverterBuffer( &rcb, &Data, length, dblRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	468 doRateConversion( &rcb, doubleRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	469 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	470 return 2 + doRateConversion( &rcb, doubleRate2, NULL );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	471 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	472
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	473 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	474 static int halfRateMono( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	475 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	476 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	477 initRateConverterBuffer( &rcb, &Data, length, hlfRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	478 return doRateConversion( &rcb, halfRate1, NULL );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	479 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	480
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	481 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	482 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	483 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	484 initRateConverterBuffer( &rcb, &Data, length, hlfRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	485 doRateConversion( &rcb, halfRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	486 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	487 return 2 + doRateConversion( &rcb, halfRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	488 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	489
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	490 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	491 static int increaseRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	492 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	493 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	494 initRateConverterBuffer( &rcb, &Data, length, incrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	495 return doRateConversion( &rcb, increaseRate1, Data.filter );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	496 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	497
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	498 static int increaseRateStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	499 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	500 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	501 initRateConverterBuffer( &rcb, &Data, length, incrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	502 doRateConversion( &rcb, increaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	503 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	504 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	505 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	506
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	507 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	508 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	509 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	510 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	511 initRateConverterBuffer( &rcb, &Data, length, dcrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	512 return doRateConversion( &rcb, decreaseRate1, Data.filter );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	513 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	514
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	515 static int decreaseRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	516 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	517 RateConverterBuffer rcb;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	518 initRateConverterBuffer( &rcb, &Data, length, dcrsRate );
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	519 doRateConversion( &rcb, decreaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	520 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	521 return doRateConversion( &rcb, decreaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	522 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	523
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	524
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	525 /-------------------------------------------------------------------------/
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	526 typedef struct{
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	527 Sint16 denominator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	528 Sint16 numerator;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	529 } Fraction;
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	530
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	531 /* 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	532 static Fraction findFraction( float Value )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	533 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	534 const Sint8 frac[95]={
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	535 2, -1, /* /1 */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	536 1, 3, -1, /* /2 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	537 2, 4, 5, -1, /* /3 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	538 3, 5, 7, -1, /* /4 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	539 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	540 5, 7, 11, -1, /* /6 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	541 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	542 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	543 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	544 7, 9, 11, 13, -1, /* /10 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	545 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	546 7, 11, 13, -1, /* /12 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	547 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	548 9, 11, 13, 15, -1, /* /14 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	549 8, 11, 13, 14, 16, -1, /* /15 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	550 9, 11, 13, 15 }; /* /16 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	551
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	552
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	553 Fraction Result = {0,0};
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	554 int i,num,den=1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	555
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	556 float RelErr, BestErr = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	557 if( Value < 31/64. \|\| Value > 64/31. ) return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	558
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	559 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	560 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	561 num = frac[i];
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	562 if( num < 0 ) den++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	563 RelErr = Value * num / den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	564 RelErr = min( RelErr, 1/RelErr );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	565 if( RelErr > BestErr )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	566 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	567 BestErr = RelErr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	568 Result.denominator = den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	569 Result.numerator = num;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	570 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	571 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	572 return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	573 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	574
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	575 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	576 static float sinc( float x )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	577 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	578 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	579 else return sin(x)/x;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	580 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	581
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	582 static void calculateVarFilter( Sint16* dst,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	583 float Ratio, float phase, float scale )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	584 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	585 const Uint16 KaiserWindow7[]= {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	586 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	587 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	588 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	589 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	590 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	591 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	592 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	593 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	594 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	595 float w;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	596 const float fg = -.018 + .5 * Ratio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	597 const float omega = 2 * M_PI * fg;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	598 phase -= 63;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	599 for( i = 0; i < 64; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	600 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	601 w = scale * ( KaiserWindow7[i] * ( i + 1 ));
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	602 dst[i] = w * sinc( omega * (i+phase) );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	603 dst[127-i] = w * sinc( omega * (127-i+phase) );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	604 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	605 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	606
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	607 static void setupVarFilter( VarFilter* filter, float Ratio )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	608 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	609 int i,n,d, incr, phase = 0;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	610 float Scale, rd;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	611 Fraction IRatio;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	612
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	613 IRatio = findFraction( Ratio );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	614 Scale = Ratio < 1. ? 0.0364733 : 0.0211952;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	615 Ratio = min( Ratio, 1/Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	616
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	617 n = IRatio.numerator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	618 d = IRatio.denominator;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	619 filter->denominator = d;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	620 filter->numerator = n;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	621 rd = 1. / d;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	622
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	623 for( i = 0; i < d; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	624 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	625 calculateVarFilter( filter->c[i], Ratio, phase*rd, Scale );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	626 phase += n;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	627 filter->incr[i] = phase / d;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	628 phase %= d;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	629 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	630 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	631
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	632 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	633 static void createRateConverter( Sound_AudioCVT Data, int fip,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	634 int SrcRate, int DestRate, int Channel )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	635 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	636 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	637
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	638 int VarPos = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	639 int Mono = 2 - Channel;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	640 float Ratio = DestRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	641 *fip = -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	642
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	643
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	644 if( SrcRate < 1 \|\| SrcRate > 1<<18 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	645 DestRate < 1 \|\| DestRate > 1<<18 ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	646 Ratio /= SrcRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	647
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	648 if( Ratio > 1.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	649 VarPos = filter_index++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	650 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	651 Data->adapter[filter_index++] = minus5dB;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	652
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	653 while( Ratio > 64./31.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	654 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	655 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	656 Mono ? doubleRateMono : doubleRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	657 Ratio /= 2.;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	658 Data->mult *= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	659 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	660 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	661 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	662
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	663 while( Ratio < 31./64. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	664 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	665 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	666 Mono ? halfRateMono : halfRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	667 Ratio *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	668 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	669
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	670 if( Ratio > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	671 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	672 setupVarFilter( &Data->filter, Ratio );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	673 Data->adapter[VarPos] =
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	674 Mono ? increaseRateMono : increaseRateStereo;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	675 Data->mult *= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	676 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	677 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	678 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	679 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	680 {
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	681 setupVarFilter( &Data->filter, Ratio );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	682 Data->adapter[filter_index++] =
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	683 Mono ? decreaseRateMono : decreaseRateStereo;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	684 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	685 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	686 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	687
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	688 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	689 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	690 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	691 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	692 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	693
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	694 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	695 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	696 Data->add /= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	697 Data->mult /= 2;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	698
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	699 if( !IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	700 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	701
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	702 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	703 Data->adapter[filter_index++] = convertStereoToMonoS16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	704 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	705 Data->adapter[filter_index++] = convertStereoToMonoU16Bit;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	706
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	707 if( !IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	708 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	709 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	710 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	711 Data->adapter[filter_index++] = swapBytes;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	712
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	713 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	714 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	715 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	716 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	717 else
368 84d6c604eaa9 Fixes to interface with SDL_sound correctly by Torbjorn. Ryan C. Gordon <icculus@icculus.org> parents: 366 diff changeset	718 Data->adapter[filter_index++] = changeSigned16BitWrong;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	719 }
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 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	722 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	723 Data->add *= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	724 Data->mult *= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	725 Data->adapter[filter_index++] = convertMonoToStereo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	726 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	727
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	728 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	729 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	730
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 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	733 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	734 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	735 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	736 if( IS_16BIT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	737 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	738 Data->add /= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	739 Data->mult /= 2;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	740
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	741 if( IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	742 Data->adapter[filter_index++] = cut16BitSysTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	743 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	744 Data->adapter[filter_index++] = cut16BitWrongTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	745 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	746
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	747 if( src.channels == 2 && dst.channels == 1 )
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 Data->add /= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	750 Data->mult /= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	751
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	752 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	753 Data->adapter[filter_index++] = convertStereoToMonoS8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	754 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	755 Data->adapter[filter_index++] = convertStereoToMonoU8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	756 }
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_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	759 Data->adapter[filter_index++] = changeSigned8Bit;
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( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	762 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	763 Data->add *= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	764 Data->mult *= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	765 Data->adapter[filter_index++] = convertMonoToStereo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	766 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	767
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	768 if( !IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	769 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	770 Data->add *= 2;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	771 Data->mult *= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	772 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	773 Data->adapter[filter_index++] = expand8BitTo16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	774 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	775 Data->adapter[filter_index++] = expand8BitTo16BitWrong;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	776 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	777
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	778 *fip = filter_index;
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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	781 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	782 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	783 SDL_AudioSpec src, SDL_AudioSpec dst )
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 int filter_index = *fip;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	786
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	787 if( IS_FLOAT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	788 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	789 Data->adapter[filter_index++] = cutFloatTo16Bit;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	790 Data->mult /= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	791 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	792 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	793
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	794 if( IS_8BIT(src) \|\| IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	795 createFormatConverter8Bit( Data, &filter_index, src, dst);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	796 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	797 createFormatConverter16Bit( Data, &filter_index, src, dst);
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	798
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	799 if( IS_FLOAT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	800 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	801 Data->adapter[filter_index++] = expand16BitToFloat;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	802 Data->mult *= 2;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	803 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	804 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	805
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	806 *fip = filter_index;
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
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	809
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	810 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	811 int BuildAudioCVT( Sound_AudioCVT *Data,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	812 SDL_AudioSpec src, SDL_AudioSpec dst )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	813 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	814 SDL_AudioSpec intrm;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	815 int filter_index = 0;
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( Data == NULL ) return -1;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	818 Data->mult = 1.;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	819 Data->add = 0;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	820 Data->filter.denominator = 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	821
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	822 /* Check channels */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	823 if( src.channels < 1 \|\| src.channels > 2 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	824 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	825
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	826 /* 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	827 if( src.freq == dst.freq )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	828 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	829 createFormatConverter( Data, &filter_index, src, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	830 goto sucess_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	831 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	832
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	833 /* Convert to signed 16Bit System-Endian */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	834 intrm.format = AUDIO_S16SYS;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	835 intrm.channels = min( src.channels, dst.channels );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	836 createFormatConverter( Data, &filter_index, src, intrm );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	837
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	838 /* Do rate conversion */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	839 if( src.channels == 2 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	840 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	841 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	842 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	843 /* propagate error */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	844 if( filter_index < 0 ) goto error_exit;
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 /* Convert to final format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	847 createFormatConverter( Data, &filter_index, intrm, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	848
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	849 /* Set up the filter information */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	850 sucess_exit:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	851 /* !!! 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	852 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	853 Data->adapter[filter_index] = NULL;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	854 Data->needed = filter_index > 0 ? 1 : 0;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	855 return 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	856
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	857 error_exit:
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	858 /* !!! 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	859 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	860 Data->adapter[0] = NULL;
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	861 Data->needed = 0;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	862 return -1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	863 }
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	864
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	865 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	866 static char *fmt_to_str(Uint16 fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	867 {
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	868 switch (fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	869 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	870 case AUDIO_U8: return " U8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	871 case AUDIO_S8: return " S8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	872 case AUDIO_U16MSB: return "U16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	873 case AUDIO_S16MSB: return "S16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	874 case AUDIO_U16LSB: return "U16LSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	875 case AUDIO_S16LSB: return "S16LSB";
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	876 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	877 return "??????";
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	878 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	879
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	880 #define AdapterDesc(x) { x, #x }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	881
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	882 static void show_AudioCVT( Sound_AudioCVT *Data )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	883 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	884 int i,j;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	885 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	886 AdapterDescription[] = {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	887 AdapterDesc(expand8BitTo16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	888 AdapterDesc(expand8BitTo16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	889 AdapterDesc(expand16BitToFloat),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	890 AdapterDesc(swapBytes),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	891 AdapterDesc(cut16BitSysTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	892 AdapterDesc(cut16BitWrongTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	893 AdapterDesc(cutFloatTo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	894 AdapterDesc(changeSigned16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	895 AdapterDesc(changeSigned16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	896 AdapterDesc(changeSigned8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	897 AdapterDesc(convertStereoToMonoS16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	898 AdapterDesc(convertStereoToMonoU16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	899 AdapterDesc(convertStereoToMonoS8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	900 AdapterDesc(convertStereoToMonoU8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	901 AdapterDesc(convertMonoToStereo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	902 AdapterDesc(convertMonoToStereo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	903 AdapterDesc(minus5dB),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	904 AdapterDesc(doubleRateMono),
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	905 AdapterDesc(doubleRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	906 AdapterDesc(halfRateMono),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	907 AdapterDesc(halfRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	908 AdapterDesc(increaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	909 AdapterDesc(increaseRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	910 AdapterDesc(decreaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	911 AdapterDesc(decreaseRateStereo),
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	912 { NULL, "----------NULL-----------" }
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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	915 fprintf( stderr, "\nAdapter List: \n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	916 for( i = 0; i < 32; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	917 {
366 eda146d666d1 More patches from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 365 diff changeset	918 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	919 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	920 if( Data->adapter[i] == AdapterDescription[j].adapter )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	921 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	922 fprintf( stderr, " %s\n", AdapterDescription[j].name );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	923 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	924 goto cont;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	925 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	926 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	927 fprintf( stderr, " Error: unknown adapter\n" );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	928
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	929 cont:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	930 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	931 fprintf( stderr, " Error: NULL adapter missing\n" );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	932 sucess_exit:
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	933 if( Data->filter.denominator )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	934 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	935 fprintf( stderr, "Variable Rate Converter:\n"
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	936 "numerator: %3d, denominator: %3d\n",
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	937 Data->filter.denominator, Data->filter.numerator );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	938
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	939 fprintf( stderr, "increment sequence: " );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	940 for( i = 0; i < Data->filter.denominator; i++ )
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	941 fprintf( stderr, "%3d ", Data->filter.incr[i] );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	942
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	943 fprintf( stderr, "\n" );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	944 }
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	945 else
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	946 {
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	947 fprintf( stderr, "No Variable Rate Converter\n" );
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	948 }
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	949 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	950
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	951
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	952 int Sound_BuildAudioCVT(Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	953 Uint16 src_format, Uint8 src_channels, int src_rate,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	954 Uint16 dst_format, Uint8 dst_channels, int dst_rate)
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	955 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	956 SDL_AudioSpec src, dst;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	957 int ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	958
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	959 fprintf (stderr,
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	960 "Sound_BuildAudioCVT() :\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	961 "-----------------------\n"
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	962 "format: %s -> %s\n"
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	963 "channels: %6d -> %6d\n"
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	964 "rate: %6d -> %6d\n",
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	965 fmt_to_str (src_format), fmt_to_str (dst_format),
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	966 src_channels, dst_channels,
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	967 src_rate, dst_rate);
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	968
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	969 src.format = src_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	970 src.channels = src_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	971 src.freq = src_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	972
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	973 dst.format = dst_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	974 dst.channels = dst_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	975 dst.freq = dst_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	976
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	977 ret = BuildAudioCVT( Data, src, dst );
371 1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	978 Data->len_mult = Data->mult > 1 ? ceil(Data->mult) : 1;
1b463ef9bcc2 More work from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 368 diff changeset	979 Data->len_ratio = Data->mult;
347 778cee61e1be Mono-to-stereo fixes, more fprintf debugging output. Ryan C. Gordon <icculus@icculus.org> parents: 342 diff changeset	980
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	981 show_AudioCVT( Data );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	982 fprintf (stderr, "\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	983 "return value: %d \n", ret );
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	984
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	985 return ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	986 }

Mercurial > SDL_sound_CoreAudio

annotate alt_audio_convert.c @ 372:ee0678efd4a3