annotate alt_audio_convert.h @ 350:cafdbcae733d

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 06 Jun 2002 18:56:45 +0000
parents 7b9a0f3f030e
children c984aa6990f7
rev   line source
338
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1 /*
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2 Extended Audio Converter for SDL (Simple DirectMedia Layer)
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
3 Copyright (C) 2002 Frank Ranostaj
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
4 Institute of Applied Physik
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
5 Johann Wolfgang Goethe-Universität
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
6 Frankfurt am Main, Germany
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
7
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
8 This library is free software; you can redistribute it and/or
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
9 modify it under the terms of the GNU Library General Public
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
10 License as published by the Free Software Foundation; either
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
11 version 2 of the License, or (at your option) any later version.
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
12
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
13 This library is distributed in the hope that it will be useful,
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
16 Library General Public License for more details.
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
17
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
18 You should have received a copy of the GNU Library General Public
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
19 License along with this library; if not, write to the Free
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
21
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
22 Frank Ranostaj
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
23 ranostaj@stud.uni-frankfurt.de
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
24
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
25 (This code blatantly abducted for SDL_sound. Thanks, Frank! --ryan.)
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
26
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
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
29 #ifndef _INCLUDE_AUDIO_CONVERT_H_
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
30 #define _INCLUDE_AUDIO_CONVERT_H_
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
31
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
32 #include "SDL_audio.h"
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
33 #define Sound_AI_Loop 0x2
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
34 #define _fsize 64
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
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
37 typedef struct{
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
38 short c[16][2*_fsize];
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
39 char incr[16];
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
40 int pos_mod;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
41 } VarFilter;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
42
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
43 typedef struct{
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
44 short* buffer;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
45 int mode;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
46 VarFilter *filter;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
47 } AdapterC;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
48
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
49 typedef struct{
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
50 int needed;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
51 VarFilter filter;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
52 double len_mult; /* buffer must be len*len_mult big*/
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
53 Uint8* buf;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
54 int len;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
55 int len_cvt; /* Length of converted audio buffer */
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
56 int add;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
57 int (*adapter[32]) ( AdapterC Data, int length );
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
58 } Sound_AudioCVT;
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
59
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
60 extern DECLSPEC int Sound_ConvertAudio( Sound_AudioCVT *Data );
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
61
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
62 extern DECLSPEC int Sound_BuildAudioConverter( Sound_AudioCVT *Data,
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
63 Uint16 src_format, Uint8 src_channels, int src_rate,
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
64 Uint16 dst_format, Uint8 dst_channels, int dst_rate );
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
65
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
66 #endif /* _INCLUDE_AUDIO_CONVERT_H_ */
7b9a0f3f030e Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
67