Mercurial > SDL_sound_CoreAudio

annotate alt_audio_convert.h @ 373:24a610dfbbfd

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
More altcvt updates from Frank.
author Ryan C. Gordon <icculus@icculus.org>
date Sat, 29 Jun 2002 04:08:17 +0000
parents 1b463ef9bcc2
children 44ed8bdeba74
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
366
eda146d666d1 More patches from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 365
diff changeset
28 #ifndef _INCLUDE_AUDIO_CONVERT_H_
eda146d666d1 More patches from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 365
diff changeset
29 #define _INCLUDE_AUDIO_CONVERT_H_
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
30
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
31 #include "SDL_audio.h"
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
32 #define Sound_AI_Loop 0x2
366
eda146d666d1 More patches from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 365
diff changeset
33 #define _fsize 32
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
34
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
35
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
36 typedef struct{
366
eda146d666d1 More patches from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 365
diff changeset
37 Sint16 c[16][4*_fsize];
371
1b463ef9bcc2 More work from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 366
diff changeset
38 Uint8 incr[16];
365
f61eadea1f44 More revisions from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 360
diff changeset
39 int denominator;
f61eadea1f44 More revisions from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 360
diff changeset
40 int numerator;
373
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
41 Uint32 zero;
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
42 int mask;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
43 } VarFilter;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
44
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
45 typedef struct{
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
46 Uint8* buffer;
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
47 int mode;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
48 VarFilter *filter;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
49 } AdapterC;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
50
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
51 typedef struct{
373
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
52 VarFilter filter;
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
53 int (*adapter[32]) ( AdapterC Data, int length );
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
54 /* buffer must be len*len_mult(+len_add) big */
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
55 int len_mult;
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
56 int len_add;
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
57 double add;
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
58
373
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
59 /* the following elements are provided for compatibility: */
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
60 /* the size of the output is approx len*len_ratio */
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
61 double len_ratio;
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
62 Uint8* buf; /* input/output buffer */
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
63 int needed; /* 0 if nothing to be done, 1 otherwise */
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
64 int len; /* Length of the input */
371
1b463ef9bcc2 More work from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 366
diff changeset
65 int len_cvt; /* Length of converted audio buffer */
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
66 } Sound_AudioCVT;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
67
373
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
68 #define SDL_SOUND_Loop 0x10
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
69
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
70 extern DECLSPEC int Sound_ConvertAudio( Sound_AudioCVT *Data );
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
71
360
c984aa6990f7 Fixes and enhancements from Frank Ranostaj.
Ryan C. Gordon <icculus@icculus.org>
parents: 338
diff changeset
72 extern DECLSPEC int Sound_BuildAudioCVT( Sound_AudioCVT *Data,
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
73 Uint16 src_format, Uint8 src_channels, int src_rate,
373
24a610dfbbfd More altcvt updates from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 371
diff changeset
74 Uint16 dst_format, Uint8 dst_channels, int dst_rate, Uint32 dst_size );
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
75
366
eda146d666d1 More patches from Frank.
Ryan C. Gordon <icculus@icculus.org>
parents: 365
diff changeset
76 #endif /* _INCLUDE_AUDIO_CONVERT_H_ */
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
77