Mercurial > sdl-ios-xcode
annotate src/audio/SDL_wave.h @ 4001:6831b8723a85 SDL-1.2
Don't initialize the audio buffer passed to the application's audio callback,
since they are expected to entirely fill it with data or silence.
For legacy apps that might expect the buffer to already have silence and thus
may not fill the buffer in the callback, there's an environment variable to
expose the old behaviour.
Fixes Bugzilla #416.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 05 Jul 2007 02:24:36 +0000 |
| parents | 7995cc87b777 |
| children | 782fd950bd46 a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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changeset
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
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5 This library is SDL_free software; you can redistribute it and/or |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
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20 slouken@libsdl.org |
| 0 | 21 */ |
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1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1336
diff
changeset
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* WAVE files are little-endian */ | |
| 25 | |
| 26 /*******************************************/ | |
| 27 /* Define values for Microsoft WAVE format */ | |
| 28 /*******************************************/ | |
| 29 #define RIFF 0x46464952 /* "RIFF" */ | |
| 30 #define WAVE 0x45564157 /* "WAVE" */ | |
| 31 #define FACT 0x74636166 /* "fact" */ | |
| 32 #define LIST 0x5453494c /* "LIST" */ | |
| 33 #define FMT 0x20746D66 /* "fmt " */ | |
| 34 #define DATA 0x61746164 /* "data" */ | |
| 35 #define PCM_CODE 0x0001 | |
| 36 #define MS_ADPCM_CODE 0x0002 | |
| 37 #define IMA_ADPCM_CODE 0x0011 | |
|
1818
7995cc87b777
Fixed some bugs in string handling
Sam Lantinga <slouken@libsdl.org>
parents:
1402
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38 #define MP3_CODE 0x0055 |
| 0 | 39 #define WAVE_MONO 1 |
| 40 #define WAVE_STEREO 2 | |
| 41 | |
| 42 /* Normally, these three chunks come consecutively in a WAVE file */ | |
| 43 typedef struct WaveFMT { | |
| 44 /* Not saved in the chunk we read: | |
| 45 Uint32 FMTchunk; | |
| 46 Uint32 fmtlen; | |
| 47 */ | |
| 48 Uint16 encoding; | |
| 49 Uint16 channels; /* 1 = mono, 2 = stereo */ | |
| 50 Uint32 frequency; /* One of 11025, 22050, or 44100 Hz */ | |
| 51 Uint32 byterate; /* Average bytes per second */ | |
| 52 Uint16 blockalign; /* Bytes per sample block */ | |
| 53 Uint16 bitspersample; /* One of 8, 12, 16, or 4 for ADPCM */ | |
| 54 } WaveFMT; | |
| 55 | |
| 56 /* The general chunk found in the WAVE file */ | |
| 57 typedef struct Chunk { | |
| 58 Uint32 magic; | |
| 59 Uint32 length; | |
|
722
90dfd3f5782c
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
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297
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60 Uint8 *data; |
| 0 | 61 } Chunk; |
| 62 |