annotate SDL_sound.h @ 284:fd9af100eb74

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Sat, 16 Mar 2002 03:48:36 +0000
parents c54eae85f5f1
children c345a40a8a99
rev   line source
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1 /*
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2 * SDL_sound -- An abstract sound format decoding API.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
3 * Copyright (C) 2001 Ryan C. Gordon.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
4 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
5 * This library is free software; you can redistribute it and/or
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
6 * modify it under the terms of the GNU Lesser General Public
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
7 * License as published by the Free Software Foundation; either
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
8 * version 2.1 of the License, or (at your option) any later version.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
9 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
10 * This library is distributed in the hope that it will be useful,
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
13 * Lesser General Public License for more details.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
14 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
15 * You should have received a copy of the GNU Lesser General Public
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
16 * License along with this library; if not, write to the Free Software
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
18 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
19
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
20 /**
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
21 * @overview
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
22 *
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
23 * The basic gist of SDL_sound is that you use an SDL_RWops to get sound data
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
24 * into this library, and SDL_sound will take that data, in one of several
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
25 * popular formats, and decode it into raw waveform data in the format of
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
26 * your choice. This gives you a nice abstraction for getting sound into your
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
27 * game or application; just feed it to SDL_sound, and it will handle
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
28 * decoding and converting, so you can just pass it to your SDL audio
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
29 * callback (or whatever). Since it gets data from an SDL_RWops, you can get
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
30 * the initial sound data from any number of sources: file, memory buffer,
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
31 * network connection, etc.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
32 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
33 * As the name implies, this library depends on SDL: Simple Directmedia Layer,
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
34 * which is a powerful, free, and cross-platform multimedia library. It can
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
35 * be found at http://www.libsdl.org/
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
36 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
37 * Support is in place or planned for the following sound formats:
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
38 * - .WAV (Microsoft WAVfile RIFF data, internal.)
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
39 * - .VOC (Creative Labs' Voice format, internal.)
11
Ryan C. Gordon <icculus@icculus.org>
parents: 3
diff changeset
40 * - .MP3 (MPEG-1 Layer 3 support, via the SMPEG library.)
252
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
41 * - .MID (MIDI music converted to Waveform data, internal.)
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
42 * - .MOD (MOD files, via MikMod and ModPlug.)
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
43 * - .OGG (Ogg files, via Ogg Vorbis libraries.)
252
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
44 * - .SHN (Shorten files, internal.)
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
45 * - .RAW (Raw sound data in any format, internal.)
252
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
46 * - .AU (Sun's Audio format, internal.)
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
47 * - .AIFF (Audio Interchange format, internal.)
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
48 * - .FLAC (Lossless audio compression, via libFLAC.)
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
49 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
50 * (...and more to come...)
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
51 *
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
52 * Please see the file COPYING in the source's root directory.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
53 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
54 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
55 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
56
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
57 #ifndef _INCLUDE_SDL_SOUND_H_
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
58 #define _INCLUDE_SDL_SOUND_H_
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
59
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
60 #include "SDL.h"
19
734e5d75acec Now includes SDL_endian.h ...
Ryan C. Gordon <icculus@icculus.org>
parents: 15
diff changeset
61 #include "SDL_endian.h"
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
62
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
63 #ifdef __cplusplus
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
64 extern "C" {
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
65 #endif
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
66
130
ac49f81e42d6 Win32 fix, upped version to 0.1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 44
diff changeset
67 #ifdef SDL_SOUND_DLL_EXPORTS
ac49f81e42d6 Win32 fix, upped version to 0.1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 44
diff changeset
68 # undef DECLSPEC
ac49f81e42d6 Win32 fix, upped version to 0.1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 44
diff changeset
69 # define DECLSPEC __declspec(dllexport)
ac49f81e42d6 Win32 fix, upped version to 0.1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 44
diff changeset
70 #endif
ac49f81e42d6 Win32 fix, upped version to 0.1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 44
diff changeset
71
ac49f81e42d6 Win32 fix, upped version to 0.1.3.
Ryan C. Gordon <icculus@icculus.org>
parents: 44
diff changeset
72
29
0e27c909c952 Upped version to 0.1.1
Ryan C. Gordon <icculus@icculus.org>
parents: 19
diff changeset
73 #define SOUND_VER_MAJOR 0
0e27c909c952 Upped version to 0.1.1
Ryan C. Gordon <icculus@icculus.org>
parents: 19
diff changeset
74 #define SOUND_VER_MINOR 1
252
c54eae85f5f1 Upped version to 0.1.5.
Ryan C. Gordon <icculus@icculus.org>
parents: 223
diff changeset
75 #define SOUND_VER_PATCH 5
29
0e27c909c952 Upped version to 0.1.1
Ryan C. Gordon <icculus@icculus.org>
parents: 19
diff changeset
76
0e27c909c952 Upped version to 0.1.1
Ryan C. Gordon <icculus@icculus.org>
parents: 19
diff changeset
77
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
78 /**
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
79 * These are flags that are used in a Sound_Sample to show various states.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
80 *
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
81 * To use: "if (sample->flags & SOUND_SAMPLEFLAG_ERROR) { dosomething(); }"
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
82 *
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
83 * @param SOUND_SAMPLEFLAG_NONE null flag.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
84 * @param SOUND_SAMPLEFLAG_NEEDSEEK SDL_RWops must be able to seek.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
85 * @param SOUND_SAMPLEFLAG_EOF end of input stream.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
86 * @param SOUND_SAMPLEFLAG_ERROR unrecoverable error.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
87 * @param SOUND_SAMPLEFLAG_EAGAIN function would block, or temp error.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
88 */
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
89 typedef enum __SOUND_SAMPLEFLAGS__
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
90 {
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
91 SOUND_SAMPLEFLAG_NONE = 0,
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
92
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
93 /* these are set at sample creation time... */
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
94 SOUND_SAMPLEFLAG_NEEDSEEK = 1,
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
95
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
96 /* these are set during decoding... */
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
97 SOUND_SAMPLEFLAG_EOF = 1 << 29,
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
98 SOUND_SAMPLEFLAG_ERROR = 1 << 30,
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
99 SOUND_SAMPLEFLAG_EAGAIN = 1 << 31
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
100 } Sound_SampleFlags;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
101
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
102
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
103 /**
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
104 * These are the basics of a decoded sample's data structure: data format
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
105 * (see AUDIO_U8 and friends in SDL_audio.h), number of channels, and sample
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
106 * rate. If you need more explanation than that, you should stop developing
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
107 * sound code right now.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
108 *
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
109 * @param format Equivalent of SDL_AudioSpec.format.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
110 * @param channels Number of sound channels. 1 == mono, 2 == stereo.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
111 * @param rate Sample rate; frequency of sample points per second (44100,
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
112 * 22050, 8000, etc.)
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
113 */
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
114 typedef struct __SOUND_AUDIOINFO__
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
115 {
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
116 Uint16 format;
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
117 Uint8 channels;
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
118 Uint32 rate;
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
119 } Sound_AudioInfo;
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
120
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
121
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
122 /**
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
123 * Each decoder sets up one of these structs, which can be retrieved via
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
124 * the Sound_AvailableDecoders() function. EVERY FIELD IN THIS IS READ-ONLY.
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
125 *
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
126 * @param extensions File extensions, list ends with NULL. Read it like this:
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
127 * const char **ext;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
128 * for (ext = info->extensions; *ext != NULL; ext++)
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
129 * printf(" File extension \"%s\"\n", *ext);
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
130 * @param description Human readable description of decoder.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
131 * @param author "Name Of Author <email@emailhost.dom>"
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
132 * @param url URL specific to this decoder.
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
133 */
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
134 typedef struct __SOUND_DECODERINFO__
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
135 {
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
136 const char **extensions;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
137 const char *description;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
138 const char *author;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
139 const char *url;
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
140 } Sound_DecoderInfo;
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
141
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
142
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
143
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
144 /**
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
145 * The Sound_Sample structure is the heart of SDL_sound. This holds
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
146 * information about a source of sound data as it is being decoded.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147 * EVERY FIELD IN THIS IS READ-ONLY. Please use the API functions to
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148 * change them.
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
149 *
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
150 * @param opaque Internal use only. Don't touch.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
151 * @param decoder Decoder used for this sample.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
152 * @param desired Desired audio format for conversion.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
153 * @param actual Actual audio format of sample.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
154 * @param buffer Decoded sound data lands in here.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
155 * @param buffer_size Current size of (buffer), in bytes (Uint8).
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
156 * @param flags Flags relating to this sample.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
157 */
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
158 typedef struct __SOUND_SAMPLE__
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 {
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
160 void *opaque;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
161 const Sound_DecoderInfo *decoder;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
162 Sound_AudioInfo desired;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
163 Sound_AudioInfo actual;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
164 void *buffer;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
165 Uint32 buffer_size;
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
166 Sound_SampleFlags flags;
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 } Sound_Sample;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
170 /**
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
171 * Just what it says: a major.minor.patch style version number...
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
172 *
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
173 * @param major The major version number.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
174 * @param minor The minor version number.
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
175 * @param patch The patchlevel version number.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 */
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
177 typedef struct __SOUND_VERSION__
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 {
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 int major;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 int minor;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 int patch;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 } Sound_Version;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 /* functions and macros... */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
188 #define SOUND_VERSION(x) { \
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
189 (x)->major = SOUND_VER_MAJOR; \
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
190 (x)->minor = SOUND_VER_MINOR; \
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
191 (x)->patch = SOUND_VER_PATCH; \
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 }
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 * Get the version of SDL_sound that is linked against your program. If you
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 * are using a shared library (DLL) version of SDL_sound, then it is possible
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197 * that it will be different than the version you compiled against.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 *
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
199 * This is a real function; the macro SOUND_VERSION tells you what version
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 * of SDL_sound you compiled against:
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 * Sound_Version compiled;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 * Sound_Version linked;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 *
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
205 * SOUND_VERSION(&compiled);
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 * Sound_GetLinkedVersion(&linked);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 * printf("We compiled against SDL_sound version %d.%d.%d ...\n",
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 * compiled.major, compiled.minor, compiled.patch);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 * printf("But we linked against SDL_sound version %d.%d.%d.\n",
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 * linked.major, linked.minor, linked.patch);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 * This function may be called safely at any time, even before Sound_Init().
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
213 *
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
214 * @param ver Sound_Version structure to fill with shared library's version.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 extern DECLSPEC void Sound_GetLinkedVersion(Sound_Version *ver);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 * Initialize SDL_sound. This must be called before any other SDL_sound
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 * function (except perhaps Sound_GetLinkedVersion()). You should call
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222 * SDL_Init() before calling this. Sound_Init() will attempt to call
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 * SDL_Init(SDL_INIT_AUDIO), just in case. This is a safe behaviour, but it
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 * may not configure SDL to your liking by itself.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 *
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
226 * @returns nonzero on success, zero on error. Specifics of the
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
227 * error can be gleaned from Sound_GetError().
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 extern DECLSPEC int Sound_Init(void);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 * Shutdown SDL_sound. This closes any SDL_RWops that were being used as
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 * sound sources, and frees any resources in use by SDL_sound.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 * All Sound_Sample pointers you had prior to this call are INVALIDATED.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 * Once successfully deinitialized, Sound_Init() can be called again to
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
239 * restart the subsystem. All default API states are restored at this
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240 * point.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 * You should call this BEFORE SDL_Quit(). This will NOT call SDL_Quit()
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 * for you!
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 *
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
245 * @returns nonzero on success, zero on error. Specifics of the error
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
246 * can be gleaned from Sound_GetError(). If failure, state of
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
247 * SDL_sound is undefined, and probably badly screwed up.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249 extern DECLSPEC int Sound_Quit(void);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 * Get a list of sound formats supported by this implementation of SDL_sound.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254 * This is for informational purposes only. Note that the extension listed is
11
Ryan C. Gordon <icculus@icculus.org>
parents: 3
diff changeset
255 * merely convention: if we list "MP3", you can open an MPEG-1 Layer 3 audio
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 * file with an extension of "XYZ", if you like. The file extensions are
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 * informational, and only required as a hint to choosing the correct
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 * decoder, since the sound data may not be coming from a file at all, thanks
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 * to the abstraction that an SDL_RWops provides.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 * The returned value is an array of pointers to Sound_DecoderInfo structures,
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 * with a NULL entry to signify the end of the list:
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 * Sound_DecoderInfo **i;
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 * for (i = Sound_AvailableDecoders(); *i != NULL; i++)
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 * {
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 * printf("Supported sound format: [%s], which is [%s].\n",
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 * i->extension, i->description);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270 * // ...and other fields...
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 * }
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 * The return values are pointers to static internal memory, and should
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 * be considered READ ONLY, and never freed.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 *
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
276 * @returns READ ONLY Null-terminated array of READ ONLY structures.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 extern DECLSPEC const Sound_DecoderInfo **Sound_AvailableDecoders(void);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 * Get the last SDL_sound error message as a null-terminated string.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 * This will be NULL if there's been no error since the last call to this
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 * function. The pointer returned by this call points to an internal buffer.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 * Each thread has a unique error state associated with it, but each time
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 * a new error message is set, it will overwrite the previous one associated
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 * with that thread. It is safe to call this function at anytime, even
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 * before Sound_Init().
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 *
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
290 * @returns READ ONLY string of last error message.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 */
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
292 extern DECLSPEC const char *Sound_GetError(void);
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
293
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
294
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
295 /**
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
296 * Clear the current error message, so the next call to Sound_GetError() will
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
297 * return NULL.
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
298 */
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
299 extern DECLSPEC void Sound_ClearError(void);
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303 * Start decoding a new sound sample. The data is read via an SDL_RWops
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 * structure (see SDL_rwops.h in the SDL include directory), so it may be
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305 * coming from memory, disk, network stream, etc. The (ext) parameter is
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306 * merely a hint to determining the correct decoder; if you specify, for
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
307 * example, "mp3" for an extension, and one of the decoders lists that
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
308 * as a handled extension, then that decoder is given first shot at trying
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
309 * to claim the data for decoding. If none of the extensions match (or the
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
310 * extension is NULL), then every decoder examines the data to determine if
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
311 * it can handle it, until one accepts it. In such a case your SDL_RWops will
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
312 * need to be capable of rewinding to the start of the stream.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 * If no decoders can handle the data, a NULL value is returned, and a human
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
314 * readable error message can be fetched from Sound_GetError().
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315 * Optionally, a desired audio format can be specified. If the incoming data
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 * is in a different format, SDL_sound will convert it to the desired format
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317 * on the fly. Note that this can be an expensive operation, so it may be
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
318 * wise to convert data before you need to play it back, if possible, or
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 * make sure your data is initially in the format that you need it in.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 * If you don't want to convert the data, you can specify NULL for a desired
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 * format. The incoming format of the data, preconversion, can be found
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
322 * in the Sound_Sample structure.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 * Note that the raw sound data "decoder" needs you to specify both the
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
324 * extension "RAW" and a "desired" format, or it will refuse to handle
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
325 * the data. This is to prevent it from catching all formats unsupported
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
326 * by the other decoders.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327 * Finally, specify an initial buffer size; this is the number of bytes that
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 * will be allocated to store each read from the sound buffer. The more you
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 * can safely allocate, the more decoding can be done in one block, but the
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 * more resources you have to use up, and the longer each decoding call will
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 * take. Note that different data formats require more or less space to
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 * store. This buffer can be resized via Sound_SetBufferSize() ...
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
333 * The buffer size specified must be a multiple of the size of a single
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
334 * sample point. So, if you want 16-bit, stereo samples, then your sample
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
335 * point size is (2 channels * 16 bits), or 32 bits per sample, which is four
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
336 * bytes. In such a case, you could specify 128 or 132 bytes for a buffer,
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
337 * but not 129, 130, or 131 (although in reality, you'll want to specify a
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
338 * MUCH larger buffer).
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339 * When you are done with this Sound_Sample pointer, you can dispose of it
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340 * via Sound_FreeSample().
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
341 * You do not have to keep a reference to (rw) around. If this function
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
342 * suceeds, it stores (rw) internally (and disposes of it during the call
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
343 * to Sound_FreeSample()). If this function fails, it will dispose of the
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
344 * SDL_RWops for you.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346 * @param rw SDL_RWops with sound data.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
347 * @param ext File extension normally associated with a data format.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348 * Can usually be NULL.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349 * @param desired Format to convert sound data into. Can usually be NULL,
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 * if you don't need conversion.
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
351 * @returns Sound_Sample pointer, which is used as a handle to several other
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 * SDL_sound APIs. NULL on error. If error, use
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
353 * Sound_GetError() to see what went wrong.
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355 extern DECLSPEC Sound_Sample *Sound_NewSample(SDL_RWops *rw, const char *ext,
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
356 Sound_AudioInfo *desired,
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 Uint32 bufferSize);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 /**
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
360 * This is identical to Sound_NewSample(), but it creates an SDL_RWops for you
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
361 * from the file located in (filename). Note that (filename) is specified in
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
362 * platform-dependent notation. ("C:\\music\\mysong.mp3" on windows, and
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
363 * "/home/icculus/music/mysong.mp3" or whatever on Unix, etc.)
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
364 * Sound_NewSample()'s "ext" parameter is gleaned from the contents of
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
365 * (filename).
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
366 *
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
367 * @param filename file containing sound data.
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
368 * @param desired Format to convert sound data into. Can usually be NULL,
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
369 * if you don't need conversion.
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
370 * @param bufferSize size, in bytes, of initial read buffer.
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
371 * @returns Sound_Sample pointer, which is used as a handle to several other
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
372 * SDL_sound APIs. NULL on error. If error, use
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
373 * Sound_GetError() to see what went wrong.
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
374 */
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
375 extern DECLSPEC Sound_Sample *Sound_NewSampleFromFile(const char *filename,
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
376 Sound_AudioInfo *desired,
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
377 Uint32 bufferSize);
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
378
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
379 /**
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380 * Dispose of a Sound_Sample pointer that was returned from Sound_NewSample().
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
381 * This will also close/dispose of the SDL_RWops that was used at creation
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
382 * time, so there's no need to keep a reference to that around.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383 * The Sound_Sample pointer is invalid after this call, and will almost
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384 * certainly result in a crash if you attempt to keep using it.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
385 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
386 * @param sample The Sound_Sample to delete.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
387 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
388 extern DECLSPEC void Sound_FreeSample(Sound_Sample *sample);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
391 /**
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
392 * Change the current buffer size for a sample. If the buffer size could
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
393 * be changed, then the sample->buffer and sample->buffer_size fields will
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
394 * reflect that. If they could not be changed, then your original sample
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
395 * state is preserved. If the buffer is shrinking, the data at the end of
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
396 * buffer is truncated. If the buffer is growing, the contents of the new
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
397 * space at the end is undefined until you decode more into it or initialize
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
398 * it yourself.
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
399 *
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
400 * The buffer size specified must be a multiple of the size of a single
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
401 * sample point. So, if you want 16-bit, stereo samples, then your sample
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
402 * point size is (2 channels * 16 bits), or 32 bits per sample, which is four
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
403 * bytes. In such a case, you could specify 128 or 132 bytes for a buffer,
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
404 * but not 129, 130, or 131 (although in reality, you'll want to specify a
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
405 * MUCH larger buffer).
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
406 *
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
407 * @param sample The Sound_Sample whose buffer to modify.
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
408 * @param new_size The desired size, in bytes, of the new buffer.
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
409 * @returns non-zero if buffer size changed, zero on failure.
3
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
410 */
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
411 extern DECLSPEC int Sound_SetBufferSize(Sound_Sample *sample, Uint32 new_size);
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
412
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
413
fd6cd0e04e6f First stab at implementation complete.
Ryan C. Gordon <icculus@icculus.org>
parents: 1
diff changeset
414 /**
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
415 * Decode more of the sound data in a Sound_Sample. It will decode at most
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
416 * sample->buffer_size bytes into sample->buffer in the desired format, and
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
417 * return the number of decoded bytes.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
418 * If sample->buffer_size bytes could not be decoded, then please refer to
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
419 * sample->flags to determine if this was an End-of-stream or error condition.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
420 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
421 * @param sample Do more decoding to this Sound_Sample.
186
70561bf8d5fd Updated and clarified some documentation.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
422 * @returns number of bytes decoded into sample->buffer. If it is less than
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
423 * sample->buffer_size, then you should check sample->flags to see
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
424 * what the current state of the sample is (EOF, error, read again).
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
425 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
426 extern DECLSPEC Uint32 Sound_Decode(Sound_Sample *sample);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
427
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
428
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
429 /**
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
430 * Decode the remainder of the sound data in a Sound_Sample. This will
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
431 * dynamically allocate memory for the ENTIRE remaining sample.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
432 * sample->buffer_size and sample->buffer will be updated to reflect the
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
433 * new buffer. Please refer to sample->flags to determine if the decoding
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
434 * finished due to an End-of-stream or error condition.
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
435 *
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
436 * Be aware that sound data can take a large amount of memory, and that
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
437 * this function may block for quite awhile while processing. Also note
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
438 * that a streaming source (for example, from a SDL_RWops that is getting
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
439 * fed from an Internet radio feed that doesn't end) may fill all available
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440 * memory before giving up...be sure to use this on finite sound sources
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
441 * only!
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
442 *
170
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
443 * When decoding the sample in its entirety, the work is done one buffer at a
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
444 * time. That is, sound is decoded in sample->buffer_size blocks, and
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
445 * appended to a continually-growing buffer until the decoding completes.
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
446 * That means that this function will need enough RAM to hold approximately
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
447 * sample->buffer_size bytes plus the complete decoded sample at most. The
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
448 * larger your buffer size, the less overhead this function needs, but beware
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
449 * the possibility of paging to disk. Best to make this user-configurable if
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
450 * the sample isn't specific and small.
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
451 *
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
452 * @param sample Do all decoding for this Sound_Sample.
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 170
diff changeset
453 * @returns number of bytes decoded into sample->buffer. You should check
170
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
454 * sample->flags to see what the current state of the sample is
e91fb8d5bd62 Updated Sound_DecodeAll()'s comments.
Ryan C. Gordon <icculus@icculus.org>
parents: 149
diff changeset
455 * (EOF, error, read again).
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
456 */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
457 extern DECLSPEC Uint32 Sound_DecodeAll(Sound_Sample *sample);
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
458
223
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
459
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
460 /**
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
461 * Restart a sample at the start of its waveform data, as if newly
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
462 * created with Sound_NewSample(). If successful, the next call to
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
463 * Sound_Decode[All]() will give audio data from the earliest point
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
464 * in the stream.
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
465 *
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
466 * Beware that this function will fail if the SDL_RWops that feeds the
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
467 * decoder can not be rewound via it's seek method, but this can
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
468 * theoretically be avoided by wrapping it in some sort of buffering
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
469 * SDL_RWops.
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
470 *
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
471 * This function should ONLY fail if the RWops is not seekable, or
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
472 * SDL_sound is not initialized. Both can be controlled by the application,
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
473 * and thus, it is up to the developer's paranoia to dictate whether this
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
474 * function's return value need be checked at all.
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
475 *
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
476 * If this function fails, the state of the sample is undefined, but it
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
477 * is still safe to call Sound_FreeSample() to dispose of it.
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
478 *
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
479 * On success, ERROR, EOF, and EAGAIN are cleared from sample->flags. The
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
480 * ERROR flag is set on error.
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
481 *
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
482 * @param sample The Sound_Sample to rewind.
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
483 * @return nonzero on success, zero on error. Specifics of the
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
484 * error can be gleaned from Sound_GetError().
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
485 */
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
486 extern DECLSPEC int Sound_Rewind(Sound_Sample *sample);
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
487
249186e31431 Sound_Rewind() support code.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
488
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
489 #ifdef __cplusplus
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
490 }
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
491 #endif
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
492
1
508aac690b19 Whoops...changed some overlooked "voice" to "sound".
Ryan C. Gordon <icculus@icculus.org>
parents: 0
diff changeset
493 #endif /* !defined _INCLUDE_SDL_SOUND_H_ */
0
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
494
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
495 /* end of SDL_sound.h ... */
1078b3528e6f Initial revision
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
496