SDL_sound_CoreAudio: alt_audio

annotate alt_audio_convert.c @ 365:f61eadea1f44

More revisions from Frank.

author	Ryan C. Gordon <icculus@icculus.org>
date	Tue, 18 Jun 2002 21:49:44 +0000
parents	c984aa6990f7
children	eda146d666d1

rev	line source
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	2 * Extended Audio Converter for SDL (Simple DirectMedia Layer)
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	3 * Copyright (C) 2002 Frank Ranostaj
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	4 * Institute of Applied Physik
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	5 * Johann Wolfgang Goethe-Universität
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	6 * Frankfurt am Main, Germany
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	7 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	8 * This library is free software; you can redistribute it and/or
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	9 * modify it under the terms of the GNU Library General Public
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	10 * License as published by the Free Software Foundation; either
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	11 * version 2 of the License, or (at your option) any later version.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	12 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	13 * This library is distributed in the hope that it will be useful,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	16 * Library General Public License for more details.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	17 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	18 * You should have received a copy of the GNU Library General Public
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	19 * License along with this library; if not, write to the Free
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	21 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	22 * Frank Ranostaj
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	23 * ranostaj@stud.uni-frankfurt.de
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	24 *
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	25 * (This code blatantly abducted for SDL_sound. Thanks, Frank! --ryan.)
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	26 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 #include "alt_audio_convert.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 #include <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
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	32 /* just to make sure this is defined... */
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	33
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	34 #ifndef min
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	35 #define min(x, y) ( ((x) < (y)) ? (x) : (y) )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	36 #endif
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	37
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	38 #ifndef max
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	39 #define max(x, y) ( ((x) > (y)) ? (x) : (y) )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	40 #endif
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	41
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	42
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	43 /* some macros for "parsing" format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	44
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	45 #define IS_8BIT(x) ((x).format & 0x0008)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	46 #define IS_16BIT(x) ((x).format & 0x0010)
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	47 #define IS_FLOAT(x) ((x).format & 0x0020)
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	48 #define IS_SIGNED(x) ((x).format & 0x8000)
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	49 #define IS_SYSENDIAN(x) ((~AUDIO_U16SYS ^ (x).format) & 0x1000)
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	51
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	52 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	53 /* this filter (Kaiser-window beta=6.8) gives a decent -80dB attentuation */
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	54 static const int filter[_fsize / 2] =
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	55 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	56 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	57 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	58 0, 474, 0, -326, 0, 217, 0, -138,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	59 0, 83, 0, -46, 0, 23, 0, -9
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	60 };
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	61
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	62
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	63 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	64 /* the purpose of the RateConverterBuffer is to provide a continous storage
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	65 for head and tail of the (sample)-buffer. This allows a simple and
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	66 perfomant implemantation of the sample rate converters. Depending of the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	67 operation mode, two layouts for the RateConverterBuffer.inbuffer are
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	68 possible:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	69
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	70 in the Loop Mode:
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	71 ... T-4 T-3 T-2 T-1 H+0 H+1 H+2 H+3 H+4 ...
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	72 \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	73 linp, finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	74
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	75 in the Single Mode (non Loop):
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	76 ... T-4 T-3 T-2 T-1 0 0 0 ... 0 0 0 H+0 H+1 H+2 H+3 H+4 ...
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	77 \| \|
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	78 linp finp
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	79
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	80 The RateConverterBuffer allows an accurate attack and decay of the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	81 filters in the rate Converters.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	82
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	83 The pointer finp are actually shifted against the depicted position so
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	84 that on the first invocation of the rate converter the input of the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	85 filter is nearly complete in the zero region, only one input value is
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	86 used. After the calculation of the first output value, the pointer are
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	87 incremented or decremented depending on down or up conversion and the
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	88 first two input value are taken into account. This procedure repeats
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	89 until the filter has processed all zeroes. The distance of the pointer
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	90 movement is stored in flength.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	91
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	92 Further a pointer cinp to the sample buffer itself is stored. The pointer
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	93 to the sample buffer is shifted too, so that on the first use of this
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	94 pointer the filter is complete in the sample buffer. The pointer moves
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	95 over the sample buffer until it reaches the other end. The distance of
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	96 the movement is stored in clength.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	97
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	98 Finally the decay of the filter is done by linp, llength like finp,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	99 flength, but in reverse order.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	100
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	101 buffer denotes the start or the end of the output buffer, depending
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	102 on direction of the rate conversion.
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	103
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	104 All pointer and length referring the buffer as Sint16. All length
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	105 are refering to the input buffer */
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	106
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	107 typedef struct
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	108 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	109 Sint16 inbuffer[6*_fsize];
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	110 Sint16 finp, cinp, *linp;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	111 Sint16 *buffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	112 int flength, clength, llength;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	113 } RateConverterBuffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	114
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 /* Mono (1 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 #define Suffix(x) x##1
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121 /* Stereo (2 channel ) */
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	122 #define Suffix(x) x##2
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	123 #include "filter_templates.h"
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 #undef Suffix
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	126
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	127 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	128 static int ConvertAudio( Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	129 Uint8* buffer, int length, int mode )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	130 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	131 AdapterC Temp;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	132 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	133
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	134 /* Make sure there's a converter */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	135 if( Data == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	136 SDL_SetError("No converter given");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	137 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	138 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	139
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	140 /* Make sure there's data to convert */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	141 if( buffer == NULL ) {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	142 SDL_SetError("No buffer allocated for conversion");
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	143 return(-1);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	144 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	145
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	146 /* Set up the conversion and go! */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	147 Temp.buffer = buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	148 Temp.mode = mode;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	149 Temp.filter = &Data->filter;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	150
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	151 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	152 length = (*Data->adapter[i])( Temp, length);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	153
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	154 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	155 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	156
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	157 int Sound_ConvertAudio( Sound_AudioCVT *Data )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	158 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	159 /* !!! 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	160 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	161 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	162
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	163
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	164 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	165 static int expand8BitTo16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	166 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	167 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	168 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	169 Uint16* buffer = (Uint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	170 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	171 buffer[i] = inp[i]<<8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	172 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	173 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	175 static int expand8BitTo16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	176 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	177 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	178 Uint8* inp = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	179 Uint16* buffer = (Uint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	180 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	181 buffer[i] = inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	182 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	184
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	186 static int expand16BitToFloat( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	188 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	189 Sint16* inp = (Sint16*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	190 float* buffer = (float*)Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	191 for( i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	192 buffer[i] = inp[i]*(1./32767);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	193 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	197 static int swapBytes( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	199 /*
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	200 * !!! FIXME !!!
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	201 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	202 *
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	203 * Use the faster SDL-Macros to swap
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	204 * - Frank
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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	207 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	208 Uint16 a,b;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	209 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	210 for( i = length>>1; i --; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	211 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	212 a = b = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	213 buffer[i] = ( a << 8 ) \| ( b >> 8 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	214 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	215 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	216 }
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 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	219 static int cutFloatTo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	220 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	221 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	222 float* inp = (float*) Data.buffer;
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 length>>=2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	225 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	226 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	227 if( inp[i] > 1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	228 buffer[i] = 32767;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	229 else if( inp[i] < -1. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	230 buffer[i] = -32768;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	231 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	232 buffer[i] = 32767 * inp[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	233 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	234 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	235 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	236
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	237 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	238 static int cut16BitSysTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	239 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	240 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	241 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	242 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	243 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	244 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	245 buffer[i] = inp[i]>>8;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	246 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	247 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	248
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	249 static int cut16BitWrongTo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	250 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	251 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	252 Uint16* inp = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	253 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	254 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	255 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	256 buffer[i] = inp[i] & 0xff;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	257 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	259
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	261 static int changeSigned( AdapterC Data, int length, int XOR )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	263 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	264 Uint32* buffer = (Uint32*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	265 for( i = length>>2; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	266 buffer[i] ^= XOR;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	267 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	268 ((Uint8)buffer)[i] ^= ((Uint8)&XOR)[i&3];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	269 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	270 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	271
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	272 static int changeSigned16BitSys( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	273 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	274 return changeSigned( Data, length, 0x80008000 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	275 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	276
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	277 static int changeSigned16BitWrong( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	278 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	279 return changeSigned( Data, length, 0x00800080 );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	280 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	281
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	282 static int changeSigned8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	283 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	284 return changeSigned( Data, length, 0x80808080 );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	285 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	286
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 static int convertStereoToMonoS16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	289 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	290 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	291 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	292 Sint16* src = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	293 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	294 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	295 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	296 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	297 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	298
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	299 static int convertStereoToMonoU16Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	300 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	301 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	302 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	303 Uint16* src = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	304 length >>= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	305 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	306 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	307 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	308 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	309
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	310 static int convertStereoToMonoS8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	311 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	312 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	313 Sint8* buffer = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	314 Sint8* src = (Sint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	315 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	316 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	317 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	318 return length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	319 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	320
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	321 static int convertStereoToMonoU8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	322 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	323 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	324 Uint8* buffer = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	325 Uint8* src = (Uint8*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	326 length >>= 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	327 for( i = 0; i < length; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	328 buffer[i] = ((int) (src++) + (src++) ) >> 1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	329 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	330 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	331
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	332 /-------------------------------------------------------------------------/
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	333 static int convertMonoToStereo16Bit( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	334 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	335 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	336 Uint16* buffer = (Uint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	337 Uint16* dst = (Uint16*)Data.buffer + length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	338 for( i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	339 (--dst) = (--dst) = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	340 return 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	341 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	342
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	343 static int convertMonoToStereo8Bit( AdapterC Data, int length )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	344 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	345 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	346 Uint8* buffer = Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	347 Uint8* dst = Data.buffer + 2*length;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	348 for( i = length; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	349 (--dst) = (--dst) = buffer[i];
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	350 return 2*length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	351 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	352
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	353 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	354 static int minus5dB( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	355 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	356 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	357 Sint16* buffer = (Sint16*) Data.buffer;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	358 for(i = length>>1; i--; )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	359 buffer[i]= 38084 * buffer[i] >> 16;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	360 return length;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	361 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	362
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	363 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	364 static void initRateConverterBuffer( RateConverterBuffer *rcb,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	365 AdapterC* Data, int length, int rel_size )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	366 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	367 int size, slength;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	368 int den, num;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	369 int i;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	370
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	371 den = Data->filter->denominator;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	372 num = Data->filter->numerator;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	373 size = _fsize * rel_size;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	374 length >>= 1;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	375 slength = rel_size > 0 ? length : -length;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	376
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	377 rcb->buffer = (Sint16*)( Data->buffer );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	378
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	379 if( Data->mode & SDL_AI_Loop )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	380 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	381 // !!!FIXME: modulo length, take scale into account
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	382 for( i = 0; i < size; i++ )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	383 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	384 rcb->inbuffer[i] = rcb->buffer[length-size+i];
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	385 rcb->inbuffer[i+size] = rcb->buffer[i];
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	386 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	387 rcb->finp = rcb->linp = rcb->inbuffer + size;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	388 if( size < 0 )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	389 rcb->buffer += num * ( length + 2 * size ) / den;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	390 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	391 else
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	392 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	393 for( i = 0; i < size; i++ )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	394 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	395 int j;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	396 j = length-size+i;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	397 rcb->inbuffer[i] = j < 0 ? 0 : rcb->buffer[j];
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	398 rcb->inbuffer[i+size] = 0;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	399 rcb->inbuffer[i+2*size] = i < length ? rcb->buffer[i] : 0;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	400 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	401 // !!!FIXME: take lenght < size into account
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	402 rcb->finp = rcb->inbuffer + abs( 3*size/2 ) + size/2;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	403 rcb->linp = rcb->inbuffer + abs( 3*size/2 ) - size/2;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	404 rcb->flength = rcb->llength = 2*size;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	405 rcb->clength = slength - 2*size;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	406
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	407 if( size < 0 )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	408 rcb->buffer += num * ( length + 2 * size ) / den;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	409 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	410 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	411
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	412 static void nextRateConverterBuffer( RateConverterBuffer *rcb )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	413 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	414 rcb->buffer++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	415 rcb->finp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	416 rcb->cinp++;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	417 rcb->linp++;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	418 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	419
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	420 typedef Sint16* (RateConverter)( Sint16, Sint16, int, VarFilter, int*);
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	421 static int doRateConversion( RateConverterBuffer* rcb,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	422 RateConverter ffp, VarFilter* filter )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	423 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	424 int pos = 0;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	425 Sint16 *outp;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	426 outp = rcb->buffer;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	427
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	428 outp = (*ffp)( outp, rcb->finp, rcb->flength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	429 outp = (*ffp)( outp, rcb->cinp, rcb->clength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	430 outp = (*ffp)( outp, rcb->linp, rcb->llength, filter, &pos );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	431 return 2 * abs( rcb->buffer - outp );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	432 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	433
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	434
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	435 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	436 static int doubleRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	437 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	438 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	439 initRateConverterBuffer( &rcb, &Data, length, 1 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	440 return doRateConversion( &rcb, doubleRate1, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	441 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	442
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	443 static int doubleRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	444 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	445 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	446 initRateConverterBuffer( &rcb, &Data, length, 2 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	447 doRateConversion( &rcb, doubleRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	448 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	449 return 2 + doRateConversion( &rcb, doubleRate2, NULL );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	450 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	451
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	452 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	453 static int halfRateMono( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	454 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	455 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	456 initRateConverterBuffer( &rcb, &Data, length, -1 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	457 return doRateConversion( &rcb, halfRate1, NULL );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	458 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	459
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	460 static int halfRateStereo( AdapterC Data, int length )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	461 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	462 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	463 initRateConverterBuffer( &rcb, &Data, length, -2 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	464 doRateConversion( &rcb, halfRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	465 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	466 return 2 + doRateConversion( &rcb, halfRate2, NULL );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	467 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	468
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	469 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	470 static int increaseRateMono( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	471 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	472 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	473 initRateConverterBuffer( &rcb, &Data, length, 2 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	474 return doRateConversion( &rcb, increaseRate1, Data.filter );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	475 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	476
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	477 static int increaseRateStereo( AdapterC Data, int length )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	478 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	479 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	480 initRateConverterBuffer( &rcb, &Data, length, 4 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	481 doRateConversion( &rcb, increaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	482 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	483 return 2 + doRateConversion( &rcb, increaseRate2, Data.filter );
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	484 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	485
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	486 /-------------------------------------------------------------------------/
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	487 static int decreaseRateMono( AdapterC Data, int length )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	488 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	489 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	490 initRateConverterBuffer( &rcb, &Data, length, -2 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	491 return doRateConversion( &rcb, decreaseRate1, Data.filter );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	492 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	493
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	494 static int decreaseRateStereo( AdapterC Data, int length )
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	495 {
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	496 RateConverterBuffer rcb;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	497 initRateConverterBuffer( &rcb, &Data, length, -4 );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	498 doRateConversion( &rcb, decreaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	499 nextRateConverterBuffer( &rcb );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	500 return doRateConversion( &rcb, decreaseRate2, Data.filter );
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	501 }
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	502
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	503
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	504 /-------------------------------------------------------------------------/
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	505 typedef struct{
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	506 Sint16 denominator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	507 Sint16 numerator;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	508 } Fraction;
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	509
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	510 /* gives a maximal error of 3% and typical less than 0.2% */
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	511 static Fraction findFraction( float Value )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	512 {
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	513 const Sint8 frac[95]={
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	514 2, -1, /* /1 */
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	515 1, 3, -1, /* /2 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	516 2, 4, 5, -1, /* /3 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	517 3, 5, 7, -1, /* /4 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	518 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	519 5, 7, 11, -1, /* /6 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	520 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	521 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	522 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	523 7, 9, 11, 13, -1, /* /10 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	524 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	525 7, 11, 13, -1, /* /12 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	526 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	527 9, 11, 13, 15, -1, /* /14 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	528 8, 11, 13, 14, 16, -1, /* /15 */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	529 9, 11, 13, 15 }; /* /16 */
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	530
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	531
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	532 Fraction Result = {0,0};
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	533 int n,num=1,den=1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	534
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	535 float RelErr, BestErr = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	536 if( Value < 31/64. \|\| Value > 64/31. ) return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	537
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	538 for( n = 0; n < sizeof(frac); num=frac[n++] )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	539 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	540 if( num < 0 ) den++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	541 RelErr = Value * num / den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	542 RelErr = min( RelErr, 1/RelErr );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	543 if( RelErr > BestErr )
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 BestErr = RelErr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	546 Result.denominator = den;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	547 Result.numerator = num;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	548 }
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 return Result;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	551 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	552
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	553 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	554 static float sinc( float x )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	555 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	556 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	557 else return sin(x)/x;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	558 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	559
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	560 static void calculateVarFilter( Sint16* dst,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	561 float Ratio, float phase, float scale )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	562 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	563 const Uint16 KaiserWindow7[]= {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	564 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	565 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	566 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	567 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	568 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	569 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	570 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	571 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	572 int i;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	573 float w;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	574 const float fg = -.018 + .5 * Ratio;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	575 const float omega = 2 * M_PI * fg;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	576 phase -= 63;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	577 for( i = 0; i < 64; i++)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	578 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	579 w = scale * ( KaiserWindow7[i] * ( i + 1 ));
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	580 dst[i] = w * sinc( omega * (i+phase) );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	581 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	582 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	583 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	584
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	585 typedef struct{
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	586 float scale;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	587 int incr;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	588 } VarFilterMode;
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	589
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	590 const VarFilterMode Up = { 0.0211952, -1 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	591 const VarFilterMode Down = { 0.0364733, 1 };
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	592
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	593 static void setupVarFilter( VarFilter* filter,
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	594 float Ratio, VarFilterMode Direction )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	595 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	596 int i,n,d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	597 Fraction IRatio;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	598 float phase = 0.;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	599 IRatio = findFraction( Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	600 Ratio = min( Ratio, 1/Ratio );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	601
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	602 n = IRatio.numerator;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	603 d = IRatio.denominator;
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	604 filter->denominator = d;
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	605 filter->numerator = n;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	606
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	607 for( i = 0; i < d; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	608 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	609 if( phase >= n )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	610 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	611 phase -= d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	612 filter->incr[i] = Direction.incr;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	613 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	614 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	615 filter->incr[i] = 1+Direction.incr;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	616
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	617 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	618 Direction.scale );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	619 phase += d;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	620 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	621 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	622
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 static void createRateConverter( Sound_AudioCVT Data, int fip,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	625 int SrcRate, int DestRate, int Channel )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	626 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	627 int filter_index = *fip;
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 int VarPos = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	630 int Mono = 2 - Channel;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	631 float Ratio = DestRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	632 *fip = -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	633
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	634
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	635 if( SrcRate < 1 \|\| SrcRate > 1<<18 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	636 DestRate < 1 \|\| DestRate > 1<<18 ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	637 Ratio /= SrcRate;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	638
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	639 if( Ratio > 1.)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	640 VarPos = filter_index++;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	641 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	642 Data->adapter[filter_index++] = minus5dB;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	643
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	644 while( Ratio > 64./31.)
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 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	647 Mono ? doubleRateMono : doubleRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	648 Ratio /= 2.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	649 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	650 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	651 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	652 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	653
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	654 while( Ratio < 31./64. )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	655 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	656 Data->adapter[filter_index++] =
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	657 Mono ? halfRateMono : halfRateStereo;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	658 Ratio *= 2;
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
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	661 if( Ratio > 1. )
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 setupVarFilter( &Data->filter, Ratio, Up );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	664 Data->adapter[VarPos] =
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	665 Mono ? increaseRateMono : increaseRateStereo;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	666 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	667 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	668 Data->add += _fsize;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	669 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	670 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	671 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	672 setupVarFilter( &Data->filter, Ratio, Down );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	673 Data->adapter[filter_index++] =
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	674 Mono ? decreaseRateMono : decreaseRateStereo;
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	675 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	676 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	677 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	678
360 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 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	681 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	682 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	683 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	684
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	685 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	686 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	687 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	688 Data->len_mult /= 2;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	689
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	690 if( !IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	691 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	692
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	693 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	694 Data->adapter[filter_index++] = convertStereoToMonoS16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	695 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	696 Data->adapter[filter_index++] = convertStereoToMonoU16Bit;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	697
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	698 if( !IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	699 Data->adapter[filter_index++] = swapBytes;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	700 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	701 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	702 Data->adapter[filter_index++] = swapBytes;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	703
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	704 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	705 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	706 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	707 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	708 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	709 Data->adapter[filter_index++] = changeSigned16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	710 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	711
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	712 if( src.channels == 1 && dst.channels == 2 )
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 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	715 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	716 Data->adapter[filter_index++] = convertMonoToStereo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	717 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	718
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	719 *fip = filter_index;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	720 }
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	721
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	722 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	723 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	724 SDL_AudioSpec src, SDL_AudioSpec dst )
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	725 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	726 int filter_index = *fip;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	727 if( IS_16BIT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	728 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	729 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	730 Data->len_mult /= 2;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	731
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	732 if( IS_SYSENDIAN(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	733 Data->adapter[filter_index++] = cut16BitSysTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	734 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	735 Data->adapter[filter_index++] = cut16BitWrongTo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	736 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	737
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	738 if( src.channels == 2 && dst.channels == 1 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	739 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	740 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	741 Data->len_mult /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	742
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	743 if( IS_SIGNED(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	744 Data->adapter[filter_index++] = convertStereoToMonoS8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	745 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	746 Data->adapter[filter_index++] = convertStereoToMonoU8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	747 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	748
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	749 if( IS_SIGNED(src) != IS_SIGNED(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	750 Data->adapter[filter_index++] = changeSigned8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	751
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	752 if( src.channels == 1 && dst.channels == 2 )
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 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	755 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	756 Data->adapter[filter_index++] = convertMonoToStereo8Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	757 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	758
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	759 if( !IS_8BIT(dst) )
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 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	762 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	763 if( IS_SYSENDIAN(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	764 Data->adapter[filter_index++] = expand8BitTo16BitSys;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	765 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	766 Data->adapter[filter_index++] = expand8BitTo16BitWrong;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	767 }
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	768
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	769 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	770 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	771
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	772 /-------------------------------------------------------------------------/
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	773 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	774 SDL_AudioSpec src, SDL_AudioSpec dst )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	775 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	776 int filter_index = *fip;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	777
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	778 if( IS_FLOAT(src) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	779 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	780 Data->adapter[filter_index++] = cutFloatTo16Bit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	781 Data->len_mult /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	782 Data->add /= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	783 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	784
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	785 if( IS_8BIT(src) \|\| IS_8BIT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	786 createFormatConverter8Bit( Data, &filter_index, src, dst);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	787 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	788 createFormatConverter16Bit( Data, &filter_index, src, dst);
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	789
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	790 if( IS_FLOAT(dst) )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	791 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	792 Data->adapter[filter_index++] = expand16BitToFloat;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	793 Data->len_mult *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	794 Data->add *= 2;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	795 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	796
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	797 *fip = filter_index;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	798 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	799
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	800
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	801 /-------------------------------------------------------------------------/
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	802 int BuildAudioCVT( Sound_AudioCVT *Data,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	803 SDL_AudioSpec src, SDL_AudioSpec dst )
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	804 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	805 SDL_AudioSpec intrm;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	806 int filter_index = 0;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	807
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	808 if( Data == NULL ) return -1;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	809 Data->len_mult = 1.;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	810 Data->add = 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	811
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	812 /* Check channels */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	813 if( src.channels < 1 \|\| src.channels > 2 \|\|
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	814 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	815
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	816 /* 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	817 if( src.freq == dst.freq )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	818 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	819 createFormatConverter( Data, &filter_index, src, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	820 goto sucess_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	821 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	822
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	823 /* Convert to signed 16Bit System-Endian */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	824 intrm.format = AUDIO_S16SYS;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	825 intrm.channels = min( src.channels, dst.channels );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	826 createFormatConverter( Data, &filter_index, src, intrm );
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	827
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	828 /* Do rate conversion */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	829 if( src.channels == 2 && dst.channels == 2 )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	830 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	831 else
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	832 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	833 /* propagate error */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	834 if( filter_index < 0 ) goto error_exit;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	835
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	836 /* Convert to final format */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	837 createFormatConverter( Data, &filter_index, intrm, dst );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	838
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	839 /* Set up the filter information */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	840 sucess_exit:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	841 /* !!! 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	842 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	843 Data->adapter[filter_index] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	844 return 0;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	845
7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	846 error_exit:
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	847 /* !!! 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	848 Borland says no. -frank */
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	849 Data->adapter[0] = NULL;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	850 return -1;
338 7b9a0f3f030e Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	851 }
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	852
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	853 /-------------------------------------------------------------------------/
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	854 static char *fmt_to_str(Uint16 fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	855 {
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	856 switch (fmt)
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	857 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	858 case AUDIO_U8: return " U8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	859 case AUDIO_S8: return " S8";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	860 case AUDIO_U16MSB: return "U16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	861 case AUDIO_S16MSB: return "S16MSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	862 case AUDIO_U16LSB: return "U16LSB";
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	863 case AUDIO_S16LSB: return "S16LSB";
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	864 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	865 return "??????";
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	866 }
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	867
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	868 #define AdapterDesc(x) { x, #x }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	869
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	870 static void show_AudioCVT( Sound_AudioCVT *Data )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	871 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	872 int i,j;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	873 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	874 AdapterDescription[] = {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	875 AdapterDesc(expand8BitTo16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	876 AdapterDesc(expand8BitTo16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	877 AdapterDesc(expand16BitToFloat),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	878 AdapterDesc(swapBytes),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	879 AdapterDesc(cut16BitSysTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	880 AdapterDesc(cut16BitWrongTo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	881 AdapterDesc(cutFloatTo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	882 AdapterDesc(changeSigned16BitSys),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	883 AdapterDesc(changeSigned16BitWrong),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	884 AdapterDesc(changeSigned8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	885 AdapterDesc(convertStereoToMonoS16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	886 AdapterDesc(convertStereoToMonoU16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	887 AdapterDesc(convertStereoToMonoS8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	888 AdapterDesc(convertStereoToMonoU8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	889 AdapterDesc(convertMonoToStereo16Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	890 AdapterDesc(convertMonoToStereo8Bit),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	891 AdapterDesc(minus5dB),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	892 AdapterDesc(doubleRateMono),
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	893 AdapterDesc(doubleRateStereo),
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	894 AdapterDesc(halfRateMono),
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	895 AdapterDesc(halfRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	896 AdapterDesc(increaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	897 AdapterDesc(increaseRateStereo),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	898 AdapterDesc(decreaseRateMono),
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	899 AdapterDesc(decreaseRateStereo),
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	900 { NULL, "----------NULL-----------" }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	901 };
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	902 const int AdapterDescMax = sizeof(AdapterDescription)
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	903 / sizeof(*AdapterDescription);
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	904
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	905 fprintf( stderr, "\nAdapter List: \n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	906 for( i = 0; i < 32; i++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	907 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	908 for( j = 0; j < AdapterDescMax; j++ )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	909 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	910 if( Data->adapter[i] == AdapterDescription[j].adapter )
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	911 {
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	912 fprintf( stderr, " %s\n", AdapterDescription[j].name );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	913 if( Data->adapter[i] == NULL ) return;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	914 goto cont;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	915 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	916 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	917 fprintf( stderr, " Error: unknown adapter\n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	918 cont:
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	919 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	920 fprintf( stderr, " Error: NULL adapter missing\n" );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	921 }
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	922
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	923
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	924 int Sound_BuildAudioCVT(Sound_AudioCVT *Data,
365 f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	925 Uint16 src_format, Uint8 src_channels, int src_rate,
f61eadea1f44 More revisions from Frank. Ryan C. Gordon <icculus@icculus.org> parents: 360 diff changeset	926 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	927 {
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	928 SDL_AudioSpec src, dst;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	929 int ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	930
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	931 fprintf (stderr,
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	932 "Sound_BuildAudioCVT() :\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	933 "-----------------------\n"
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	934 "format: %s -> %s\n"
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	935 "channels: %6d -> %6d\n"
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	936 "rate: %6d -> %6d\n",
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	937 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	938 src_channels, dst_channels,
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	939 src_rate, dst_rate);
fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	940
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	941 src.format = src_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	942 src.channels = src_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	943 src.freq = src_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	944
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	945 dst.format = dst_format;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	946 dst.channels = dst_channels;
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	947 dst.freq = dst_rate;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	948
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	949 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	950
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	951 show_AudioCVT( Data );
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	952 fprintf (stderr, "\n"
c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	953 "return value: %d \n", ret );
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	954
360 c984aa6990f7 Fixes and enhancements from Frank Ranostaj. Ryan C. Gordon <icculus@icculus.org> parents: 347 diff changeset	955 return ret;
342 fbbb1f25b944 Cleanups by Torbjï¿½rn. Ryan C. Gordon <icculus@icculus.org> parents: 338 diff changeset	956 }

Mercurial > SDL_sound_CoreAudio

annotate alt_audio_convert.c @ 365:f61eadea1f44