SDL_sound_CoreAudio: alt_audio

annotate alt_audio_convert.c @ 360:c984aa6990f7

Fixes and enhancements from Frank Ranostaj.

author	Ryan C. Gordon <icculus@icculus.org>
date	Wed, 12 Jun 2002 08:35:23 +0000
parents	778cee61e1be
children	f61eadea1f44

rev	line source
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	2 Extended Audio Converter for SDL (Simple DirectMedia Layer)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	3 Copyright (C) 2002 Frank Ranostaj
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	4 Institute of Applied Physik
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	5 Johann Wolfgang Goethe-Universität
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	6 Frankfurt am Main, Germany
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	8 This library is free software; you can redistribute it and/or
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	9 modify it under the terms of the GNU Library General Public
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	10 License as published by the Free Software Foundation; either
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	11 version 2 of the License, or (at your option) any later version.
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	13 This library is distributed in the hope that it will be useful,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	14 but WITHOUT ANY WARRANTY; without even the implied warranty of
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	16 Library General Public License for more details.
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	18 You should have received a copy of the GNU Library General Public
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	19 License along with this library; if not, write to the Free
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	22 Frank Ranostaj
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	23 ranostaj@stud.uni-frankfurt.de
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 (This code blatantly abducted for SDL_sound. Thanks, Frank! --ryan.)
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 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 <stdlib.h>
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30 #include <math.h>
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	31
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	32 /* some macros for "parsing" format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	33
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	34 #define IS_8BIT(x) ((x).format & 0x0008)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	35 #define IS_16BIT(x) ((x).format & 0x0010)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	36 #define IS_FLOAT(x) ((x).format & 0x0020) /* !!! FIXME: is this ok? */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	37 #define IS_SIGNED(x) ((x).format & 0x8000)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	38 #define IS_SYSENDIAN(x) ((AUDIO_U16SYS ^ (x).format) & 0x1000)
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	42 /* this filter (Kaiser-window beta=6.8) gives a decent -80dB attentuation */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43 static const int filter[_fsize/2] = {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	44 0, 20798, 0, -6764, 0, 3863, 0, -2560,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	45 0, 1800, 0, -1295, 0, 936, 0, -671,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	46 0, 474, 0, -326, 0, 217, 0, -138,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	47 0, 83, 0, -46, 0, 23, 0, -9 };
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 /* Mono (1 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50 #define Suffix(x) x##1
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	51 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	52 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54 /* Stereo (2 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55 #define Suffix(x) x##2
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	59 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	60 static int ConvertAudio( Sound_AudioCVT *Data,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	61 Uint8* buffer, int length, int mode )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	62 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	63 AdapterC Temp;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	64 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	65
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	66 /* Make sure there's a converter */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	67 if( Data == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	68 SDL_SetError("No converter given");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	69 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	70 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	72 /* Make sure there's data to convert */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	73 if( buffer == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	74 SDL_SetError("No buffer allocated for conversion");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	75 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	76 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	77
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	78 /* Set up the conversion and go! */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	79 Temp.buffer = buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	80 Temp.mode = mode;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	81 Temp.filter = &Data->filter;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	82
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	83 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	84 length = (*Data->adapter[i])( Temp, length);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	85
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	86 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	87 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	88
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	89 int Sound_ConvertAudio( Sound_AudioCVT *Data )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	90 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	91 /* !!! FIXME: Try the looping stuff under certain circumstances? --ryan. */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	92 return ConvertAudio( Data, Data->buf, Data->len, 0 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	93 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	94
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	95
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	96 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	97 static int expand8BitTo16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	98 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	99 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	100 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	101 Uint16* buffer = (Uint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	102 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	103 buffer[i] = inp[i]<<8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	104 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	105 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	107 static int expand8BitTo16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	108 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	109 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	110 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	111 Uint16* buffer = (Uint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	112 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	113 buffer[i] = inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	114 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	118 static int expand16BitToFloat( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 {
360 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 Sint16* inp = (Sint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	122 float* buffer = (float*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	123 for( i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	124 buffer[i] = inp[i]*(1./32767);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	125 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	128 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	129 static int swapBytes( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	130 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	131 /*
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	132 * !!! FIXME !!!
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 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	135 * Use the faster SDL-Macros to swap
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	136 * - Frank
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	137 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	138
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	139 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	140 Uint16 a,b;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	141 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	142 for( i = length>>1; i --; )
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 a = b = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	145 buffer[i] = ( a << 8 ) \| ( b >> 8 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	146 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	147 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	148 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	149
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	151 static int cutFloatTo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	152 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	153 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	154 float* inp = (float*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	155 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	156 length>>=2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	157 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	158 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	159 if( inp[i] > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	160 buffer[i] = 32767;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	161 else if( inp[i] < -1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	162 buffer[i] = -32768;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	163 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	164 buffer[i] = 32767 * inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	165 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	166 return 2*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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	169 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	170 static int cut16BitSysTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	171 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	172 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	173 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	174 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	175 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	176 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	177 buffer[i] = inp[i]>>8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	178 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	179 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	180
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	181 static int cut16BitWrongTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	182 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	183 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	184 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	185 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	186 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	187 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	188 buffer[i] = inp[i] & 0xff;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	189 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	193 static int changeSigned( AdapterC Data, int length, int XOR )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	195 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	196 Uint32* buffer = (Uint32*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	197 for( i = length>>2; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	198 buffer[i] ^= XOR;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	199 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	200 ((Uint8)buffer)[i] ^= ((Uint8)&XOR)[i&3];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	201 return length;
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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	204 static int changeSigned16BitSys( AdapterC Data, int length )
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 changeSigned( Data, length, 0x80008000 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	207 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	208
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	209 static int changeSigned16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	210 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	211 return changeSigned( Data, length, 0x00800080 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	212 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	213
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	214 static int changeSigned8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	215 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	216 return changeSigned( Data, length, 0x80808080 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	217 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	218
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	219 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	220 static int convertStereoToMonoS16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	222 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	223 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	224 Sint16* src = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	225 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	226 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	227 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	228 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	229 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	230
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	231 static int convertStereoToMonoU16Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	232 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	233 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	234 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	235 Uint16* src = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	236 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	237 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	238 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	239 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	240 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	241
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	242 static int convertStereoToMonoS8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	243 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	244 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	245 Sint8* buffer = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	246 Sint8* src = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	247 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	248 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	249 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	250 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	251 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	252
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	253 static int convertStereoToMonoU8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	254 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	255 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	256 Uint8* buffer = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	257 Uint8* src = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	258 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	259 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	260 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	261 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	265 static int convertMonoToStereo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	267 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	268 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	269 Uint16* dst = (Uint16*)Data.buffer + length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	270 for( i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	271 (--dst) = (--dst) = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	272 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	273 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	275 static int convertMonoToStereo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	276 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	277 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	278 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	279 Uint8* dst = Data.buffer + 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	280 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	281 (--dst) = (--dst) = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	282 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	283 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	284
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	285 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	286 static int minus5dB( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	287 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	288 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	289 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	290 for(i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	291 buffer[i]= 38084 * buffer[i] >> 16;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	292 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	293 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	294
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	295 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	296 static int doubleRateStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	297 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	298 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	299 _doubleRate2( (Sint16*)Data.buffer, Data.mode, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	300 return 4_doubleRate2( (Sint16)Data.buffer+1, Data.mode, length );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	301 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	302
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	303 static int doubleRateMono( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	304 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	305 return 2_doubleRate1( (Sint16)Data.buffer, Data.mode, length>>1 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	306 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	307
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	308 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	309 static int halfRateStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	310 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	311 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	312 _halfRate2( (Sint16*)Data.buffer, Data.mode, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	313 return 4_halfRate2( (Sint16)Data.buffer+1, Data.mode, length );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	314 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	315
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	316 static int halfRateMono( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	317 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	318 return 2_halfRate2( (Sint16)Data.buffer, Data.mode, length>>1 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	319 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	320
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	321 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	322 static int varRateUpStereo( AdapterC Data, int length )
338 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 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	325 _varRateUp2( (Sint16*)Data.buffer, Data.mode, Data.filter, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	326 return 4 * _varRateUp2( (Sint16*)Data.buffer+1,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	327 Data.mode, Data.filter, length );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	328 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	329
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	330 static int varRateUpMono( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	331 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	332 return 2 * _varRateUp1( (Sint16*)Data.buffer,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	333 Data.mode, Data.filter, length>>1 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	334 }
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 static int varRateDownStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	337 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	338 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	339 _varRateDown2( (Sint16*)Data.buffer, Data.mode, Data.filter, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	340 return 2 * _varRateDown2( (Sint16*)Data.buffer+1,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	341 Data.mode, Data.filter, length );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	342 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	343
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	344 static int varRateDownMono( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	345 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	346 return _varRateDown1( (Sint16*)Data.buffer,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	347 Data.mode, Data.filter, length>>1 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	348 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	349
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	350 /-------------------------------------------------------------------------/
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	351 typedef struct{
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	352 Sint16 denominator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	353 Sint16 numerator;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	354 } Fraction;
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	355
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	356 static Fraction findFraction( float Value )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	357 {
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	358 /* gives a maximal error of 3% and typical less than 0.2% */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	359 const Uint8 frac[96]={
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	360 1, 2, -1, /* /1 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	361 1, 3, -1, /* /2 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	362 2, 4, 5, -1, /* /3 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	363 3, 5, 7, -1, /* /4 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	364 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	365 5, 7, 11, -1, /* /6 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	366 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	367 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	368 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	369 7, 9, 11, 13, -1, /* /10 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	370 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	371 7, 11, 13, -1, /* /12 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	372 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	373 9, 11, 13, 15, -1, /* /14 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	374 8, 11, 13, 14, 16, -1, /* /15 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	375 9, 11, 13, 15 }; /* /16 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	376
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	377
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	378 Fraction Result = {0,0};
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	379 int n,num,den=1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	380
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	381 float RelErr, BestErr = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	382 if( Value < 31/64. \|\| Value > 64/31. ) return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	383
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	384 for( n = 0; n < sizeof(frac); num=frac[++n] )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	385 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	386 if( num < 0 ) den++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	387 RelErr = Value * num / den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	388 RelErr = min( RelErr, 1/RelErr );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	389 if( RelErr > BestErr )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	390 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	391 BestErr = RelErr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	392 Result.denominator = den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	393 Result.numerator = num;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	394 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	395 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	396 return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	397 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	398
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	399 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	400 static float sinc( float x )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	401 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	402 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	403 else return sin(x)/x;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	404 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	405
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	406 static void calculateVarFilter( Sint16* dst, float Ratio, float phase, float scale )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	407 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	408 const Uint16 KaiserWindow7[]= {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	409 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	410 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	411 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	412 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	413 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	414 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	415 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	416 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	417 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	418 float w;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	419 const float fg = -.018 + .5 * Ratio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	420 const float omega = 2 * M_PI * fg;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	421 phase -= 63;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	422 for( i = 0; i < 64; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	423 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	424 w = scale * ( KaiserWindow7[i] * ( i + 1 ));
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	425 dst[i] = w * sinc( omega * (i+phase) );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	426 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	427 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	428 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	429
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	430 typedef struct{
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	431 float scale;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	432 int incr;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	433 } VarFilterMode;
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	434
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	435 const VarFilterMode Up = { 0.0211952, -1 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	436 const VarFilterMode Down = { 0.0364733, 1 };
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	437
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	438 static void setupVarFilter( VarFilter* filter,
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	439 float Ratio, VarFilterMode Direction )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	440 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	441 int i,n,d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	442 Fraction IRatio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	443 float phase;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	444 IRatio = findFraction( Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	445 Ratio = min( Ratio, 1/Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	446
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	447 n = IRatio.numerator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	448 d = IRatio.denominator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	449 filter->pos_mod = d;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	450
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	451 for( i = 0; i < d; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	452 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	453 if( phase >= n )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	454 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	455 phase -= d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	456 filter->incr[i] = Direction.incr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	457 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	458 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	459 filter->incr[i] = 1+Direction.incr;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	460
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	461 calculateVarFilter( filter->c[i], Ratio, phase/(float)n,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	462 Direction.scale );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	463 phase += d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	464 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	465 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	466
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	467 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	468 static void createRateConverter( Sound_AudioCVT Data, int fip,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	469 int SrcRate, int DestRate, int Channel )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	470 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	471 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	472
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	473 int VarPos = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	474 int Mono = 2 - Channel;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	475 float Ratio = DestRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	476 *fip = -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	477
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	478
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	479 if( SrcRate < 1 \|\| SrcRate > 1<<18 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	480 DestRate < 1 \|\| DestRate > 1<<18 ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	481 Ratio /= SrcRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	482
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	483 if( Ratio > 1.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	484 VarPos = filter_index++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	485 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	486 Data->adapter[filter_index++] = minus5dB;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	487
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	488 while( Ratio > 64./31.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	489 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	490 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	491 Mono ? doubleRateMono : doubleRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	492 Ratio /= 2.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	493 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	494 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	495 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	496 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	497
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	498 while( Ratio < 31./64. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	499 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	500 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	501 Mono ? halfRateMono : halfRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	502 Ratio *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	503 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	504
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	505 if( Ratio > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	506 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	507 setupVarFilter( &Data->filter, Ratio, Up );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	508 Data->adapter[VarPos] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	509 Mono ? varRateUpMono : varRateUpStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	510 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	511 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	512 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	513 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	514 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	515 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	516 setupVarFilter( &Data->filter, Ratio, Down );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	517 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	518 Mono ? varRateDownMono : varRateDownStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	519 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	520 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	521 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	522
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	523 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	524 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	525 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	526 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	527 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	528
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	529 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	530 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	531 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	532 Data->len_mult /= 2;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	533
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	534 if( !IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	535 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	536
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	537 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	538 Data->adapter[filter_index++] = convertStereoToMonoS16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	539 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	540 Data->adapter[filter_index++] = convertStereoToMonoU16Bit;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	541
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	542 if( !IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	543 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	544 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	545 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	546 Data->adapter[filter_index++] = swapBytes;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	547
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	548 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	549 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	550 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	551 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	552 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	553 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	554 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	555
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	556 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	557 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	558 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	559 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	560 Data->adapter[filter_index++] = convertMonoToStereo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	561 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	562
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	563 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	564 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	565
360 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 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	568 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	569 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	570 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	571 if( IS_16BIT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	572 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	573 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	574 Data->len_mult /= 2;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	575
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	576 if( IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	577 Data->adapter[filter_index++] = cut16BitSysTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	578 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	579 Data->adapter[filter_index++] = cut16BitWrongTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	580 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	581
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	582 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	583 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	584 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	585 Data->len_mult /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	586
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	587 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	588 Data->adapter[filter_index++] = convertStereoToMonoS8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	589 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	590 Data->adapter[filter_index++] = convertStereoToMonoU8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	591 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	592
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	593 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	594 Data->adapter[filter_index++] = changeSigned8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	595
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	596 if( src.channels == 1 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	597 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	598 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	599 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	600 Data->adapter[filter_index++] = convertMonoToStereo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	601 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	602
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	603 if( !IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	604 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	605 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	606 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	607 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	608 Data->adapter[filter_index++] = expand8BitTo16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	609 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	610 Data->adapter[filter_index++] = expand8BitTo16BitWrong;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	611 }
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 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	614 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	615
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 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	618 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	619 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	620 int filter_index = *fip;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	621
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	622 if( IS_FLOAT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	623 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	624 Data->adapter[filter_index++] = cutFloatTo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	625 Data->len_mult /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	626 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	627 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	628
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	629 if( IS_8BIT(src) \|\| IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	630 createFormatConverter8Bit( Data, &filter_index, src, dst);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	631 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	632 createFormatConverter16Bit( Data, &filter_index, src, dst);
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	633
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	634 if( IS_FLOAT(dst) )
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 Data->adapter[filter_index++] = expand16BitToFloat;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	637 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	638 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	639 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	640
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	641 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	642 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	643
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	644
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	645 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	646 DECLSPEC int BuildAudioCVT(Sound_AudioCVT *Data,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	647 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	648 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	649 SDL_AudioSpec intrm;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	650 int filter_index = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	651
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	652 if( Data == NULL ) return -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	653 Data->len_mult = 1.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	654 Data->add = 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	655
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	656 /* Check channels */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	657 if( src.channels < 1 \|\| src.channels > 2 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	658 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	659
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	660 /* 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	661 if( src.freq == dst.freq )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	662 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	663 createFormatConverter( Data, &filter_index, src, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	664 goto sucess_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	665 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	666
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	667 /* Convert to signed 16Bit System-Endian */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	668 intrm.format = AUDIO_S16SYS;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	669 intrm.channels = min( src.channels, dst.channels );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	670 createFormatConverter( Data, &filter_index, src, intrm );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	671
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	672 /* Do rate conversion */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	673 if( src.channels == 2 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	674 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	675 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	676 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	677 /* propagate error */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	678 if( filter_index < 0 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	679
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	680 /* Convert to final format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	681 createFormatConverter( Data, &filter_index, intrm, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	682
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	683 /* Set up the filter information */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	684 sucess_exit:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	685 /* !!! 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	686 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	687 Data->adapter[filter_index] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	688 return 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	689
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	690 error_exit:
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	691 /* !!! 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	692 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	693 Data->adapter[0] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	694 return -1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	695 }
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	696
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	697 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	698 static char *fmt_to_str(Uint16 fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	699 {
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	700 switch (fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	701 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	702 case AUDIO_U8: return " U8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	703 case AUDIO_S8: return " S8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	704 case AUDIO_U16MSB: return "U16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	705 case AUDIO_S16MSB: return "S16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	706 case AUDIO_U16LSB: return "U16LSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	707 case AUDIO_S16LSB: return "S16LSB";
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	708 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	709 return "??????";
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	710 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	711
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	712 #define AdapterDesc(x) { x, #x }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	713
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	714 static void show_AudioCVT( Sound_AudioCVT *Data )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	715 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	716 int i,j;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	717 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	718 AdapterDescription[] = {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	719 AdapterDesc(expand8BitTo16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	720 AdapterDesc(expand8BitTo16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	721 AdapterDesc(expand16BitToFloat),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	722 AdapterDesc(swapBytes),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	723 AdapterDesc(cut16BitSysTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	724 AdapterDesc(cut16BitWrongTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	725 AdapterDesc(cutFloatTo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	726 AdapterDesc(changeSigned16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	727 AdapterDesc(changeSigned16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	728 AdapterDesc(changeSigned8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	729 AdapterDesc(convertStereoToMonoS16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	730 AdapterDesc(convertStereoToMonoU16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	731 AdapterDesc(convertStereoToMonoS8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	732 AdapterDesc(convertStereoToMonoU8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	733 AdapterDesc(convertMonoToStereo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	734 AdapterDesc(convertMonoToStereo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	735 AdapterDesc(minus5dB),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	736 AdapterDesc(doubleRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	737 AdapterDesc(doubleRateMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	738 AdapterDesc(halfRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	739 AdapterDesc(halfRateMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	740 AdapterDesc(varRateUpStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	741 AdapterDesc(varRateUpMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	742 AdapterDesc(varRateDownStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	743 AdapterDesc(varRateDownMono),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	744 { NULL, "----------NULL-----------" }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	745 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	746 const int AdapterDescMax = sizeof(AdapterDescription)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	747 / sizeof(*AdapterDescription);
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 fprintf( stderr, "\nAdapter List: \n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	750 for( i = 0; i < 32; i++ )
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 for( j = 0; j < AdapterDescMax; j++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	753 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	754 if( Data->adapter[i] == AdapterDescription[j].adapter )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	755 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	756 fprintf( stderr, " %s\n", AdapterDescription[j].name );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	757 if( Data->adapter[i] == NULL ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	758 goto cont;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	759 }
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 fprintf( stderr, " Error: unknown adapter\n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	762 cont:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	763 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	764 fprintf( stderr, " Error: NULL adapter missing\n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	765 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	766
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	767
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	768 int Sound_BuildAudioCVT(Sound_AudioCVT *Data,
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	769 Uint16 src_format, Uint8 src_channels, int src_rate,
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	770 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	771 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	772 SDL_AudioSpec src, dst;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	773 int ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	774
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	775 fprintf (stderr,
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	776 "Sound_BuildAudioCVT() :\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	777 "-----------------------\n"
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	778 "format: %s -> %s\n"
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	779 "channels: %6d -> %6d\n"
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	780 "rate: %6d -> %6d\n",
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	781 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	782 src_channels, dst_channels,
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	783 src_rate, dst_rate);
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	784
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	785 src.format = src_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	786 src.channels = src_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	787 src.freq = src_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	788
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	789 dst.format = dst_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	790 dst.channels = dst_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	791 dst.freq = dst_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	792
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	793 ret = BuildAudioCVT( Data, src, dst );
347 778cee61e1be Mono-to-stereo fixes, more fprintf debugging output. Ryan C. Gordon <icculus@icculus.org> parents: 342 diff changeset	794
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	795 show_AudioCVT( Data );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	796 fprintf (stderr, "\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	797 "return value: %d \n", ret );
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	798
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	799 return ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	800 }

Mercurial > SDL_sound_CoreAudio

annotate alt_audio_convert.c @ 360:c984aa6990f7