Mercurial > SDL_sound_CoreAudio
annotate decoders/skeleton.c @ 149:1df5c106504e
Decoders can now list multiple file extensions.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 01 Nov 2001 19:13:17 +0000 |
| parents | 40de367eb59e |
| children | 47cc2de2ae36 |
| rev | line source |
|---|---|
| 16 | 1 /* |
| 2 * SDL_sound -- An abstract sound format decoding API. | |
| 3 * Copyright (C) 2001 Ryan C. Gordon. | |
| 4 * | |
| 5 * This library is free software; you can redistribute it and/or | |
| 6 * modify it under the terms of the GNU Lesser General Public | |
| 7 * License as published by the Free Software Foundation; either | |
| 8 * version 2.1 of the License, or (at your option) any later version. | |
| 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 | |
| 13 * Lesser General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU Lesser General Public | |
| 16 * License along with this library; if not, write to the Free Software | |
| 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 */ | |
| 19 | |
| 20 /* | |
| 21 * FMT decoder for SDL_sound. | |
| 22 * | |
| 23 * This driver handles FMT audio data. Blahblahblah... The author should | |
| 24 * have done a search and replace on "fmt" and "FMT" and changed this | |
| 25 * comment. This is the default comment in the skeleton decoder file... | |
| 26 * | |
| 27 * Please see the file LICENSE in the source's root directory. | |
| 28 * | |
| 29 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org) | |
| 30 */ | |
| 31 | |
|
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32 #error DO NOT COMPILE THIS. |
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33 #error This is an example decoder skeleton. |
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34 #error You should base your code on this file, and remove these error lines |
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35 #error from your version. |
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36 |
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37 #if HAVE_CONFIG_H |
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38 # include <config.h> |
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39 #endif |
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40 |
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41 #ifdef SOUND_SUPPORTS_FMT |
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42 |
| 16 | 43 #include <stdio.h> |
| 44 #include <stdlib.h> | |
| 45 #include <string.h> | |
| 46 #include <assert.h> | |
| 47 | |
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48 #include "SDL_sound.h" |
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49 |
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50 #define __SDL_SOUND_INTERNAL__ |
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51 #include "SDL_sound_internal.h" |
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52 |
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53 static int FMT_init(void); |
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54 static void FMT_quit(void); |
| 16 | 55 static int FMT_open(Sound_Sample *sample, const char *ext); |
| 56 static void FMT_close(Sound_Sample *sample); | |
| 57 static Uint32 FMT_read(Sound_Sample *sample); | |
| 58 | |
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59 static const char *extensions_fmt[] = { "FMT", NULL }; |
| 16 | 60 const Sound_DecoderFunctions __Sound_DecoderFunctions_FMT = |
| 61 { | |
| 62 { | |
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63 extensions_fmt, |
| 16 | 64 "FMT audio format description", |
| 65 "Ryan C. Gordon <icculus@clutteredmind.org>", | |
| 66 "http://www.icculus.org/SDL_sound/" | |
| 67 }, | |
| 68 | |
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69 FMT_init, /* init() method */ |
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70 FMT_quit, /* quit() method */ |
| 16 | 71 FMT_open, /* open() method */ |
| 72 FMT_close, /* close() method */ | |
| 73 FMT_read /* read() method */ | |
| 74 }; | |
| 75 | |
| 76 | |
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77 static int FMT_init(void) |
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78 { |
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79 /* do any global decoder/library initialization you need here. */ |
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80 |
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81 return(1); /* initialization successful. */ |
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82 } /* FMT_init */ |
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83 |
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84 |
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85 static void FMT_quit(void) |
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86 { |
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87 /* do any global decoder/library cleanup you need here. */ |
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88 } /* FMT_quit */ |
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89 |
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90 |
| 16 | 91 static int FMT_open(Sound_Sample *sample, const char *ext) |
| 92 { | |
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93 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
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94 SDL_RWops *rw = internal->rw; |
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95 |
| 16 | 96 if (can NOT accept the data) |
| 97 { | |
| 98 Sound_SetError("FMT: expected X, got Y."); | |
| 99 return(0); | |
| 100 } /* if */ | |
| 101 | |
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102 SNDDBG(("FMT: Accepting data stream.\n")); |
| 16 | 103 set up sample->actual; |
| 104 sample->flags = SOUND_SAMPLEFLAG_NONE; | |
| 105 return(1); /* we'll handle this data. */ | |
| 106 } /* FMT_open */ | |
| 107 | |
| 108 | |
| 109 static void FMT_close(Sound_Sample *sample) | |
| 110 { | |
| 111 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 112 clean up anything you put into internal->decoder_private; | |
| 113 } /* FMT_close */ | |
| 114 | |
| 115 | |
| 116 static Uint32 FMT_read(Sound_Sample *sample) | |
| 117 { | |
| 118 Uint32 retval; | |
| 119 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 120 | |
| 121 /* | |
| 122 * We don't actually do any decoding, so we read the fmt data | |
| 123 * directly into the internal buffer... | |
| 124 */ | |
| 125 retval = SDL_RWread(internal->rw, internal->buffer, | |
| 126 1, internal->buffer_size); | |
| 127 | |
| 128 (or whatever. Do some decoding here...) | |
| 129 | |
| 130 /* Make sure the read went smoothly... */ | |
| 131 if (retval == 0) | |
| 132 sample->flags |= SOUND_SAMPLEFLAG_EOF; | |
| 133 | |
| 134 else if (retval == -1) | |
| 135 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 136 | |
| 137 /* (next call this EAGAIN may turn into an EOF or error.) */ | |
| 138 else if (retval < internal->buffer_size) | |
| 139 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN; | |
| 140 | |
| 141 (or whatever. retval == number of bytes you put in internal->buffer). | |
| 142 | |
| 143 return(retval); | |
| 144 } /* FMT_read */ | |
| 145 | |
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146 #endif /* SOUND_SUPPORTS_FMT */ |
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147 |
| 16 | 148 |
| 149 /* end of fmt.c ... */ | |
| 150 |