Mercurial > SDL_sound_CoreAudio
annotate decoders/skeleton.c @ 180:db3f0ee7aac0
Modified to more easily allow for different compression types.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Fri, 07 Dec 2001 20:31:20 +0000 |
| parents | 1df5c106504e |
| 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 | |
|
103
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
32 #error DO NOT COMPILE THIS. |
|
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
33 #error This is an example decoder skeleton. |
|
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
34 #error You should base your code on this file, and remove these error lines |
|
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
35 #error from your version. |
|
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
36 |
|
106
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
37 #if HAVE_CONFIG_H |
|
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
38 # include <config.h> |
|
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
39 #endif |
|
100
6d9fdec2f708
added config.h, added --enable-debug flag, various other changes to the build system
fingolfin
parents:
64
diff
changeset
|
40 |
|
103
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
41 #ifdef SOUND_SUPPORTS_FMT |
|
706ec5842737
Updated for autoconf change, and placed #error messages so people don't
Ryan C. Gordon <icculus@icculus.org>
parents:
100
diff
changeset
|
42 |
| 16 | 43 #include <stdio.h> |
| 44 #include <stdlib.h> | |
| 45 #include <string.h> | |
| 46 #include <assert.h> | |
| 47 | |
|
106
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
48 #include "SDL_sound.h" |
|
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
49 |
|
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
50 #define __SDL_SOUND_INTERNAL__ |
|
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
51 #include "SDL_sound_internal.h" |
|
40de367eb59e
Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents:
103
diff
changeset
|
52 |
|
47
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
53 static int FMT_init(void); |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
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 | |
|
149
1df5c106504e
Decoders can now list multiple file extensions.
Ryan C. Gordon <icculus@icculus.org>
parents:
106
diff
changeset
|
59 static const char *extensions_fmt[] = { "FMT", NULL }; |
| 16 | 60 const Sound_DecoderFunctions __Sound_DecoderFunctions_FMT = |
| 61 { | |
| 62 { | |
|
149
1df5c106504e
Decoders can now list multiple file extensions.
Ryan C. Gordon <icculus@icculus.org>
parents:
106
diff
changeset
|
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 | |
|
47
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
69 FMT_init, /* init() method */ |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
70 FMT_quit, /* quit() method */ |
| 16 | 71 FMT_open, /* open() method */ |
| 72 FMT_close, /* close() method */ | |
| 73 FMT_read /* read() method */ | |
| 74 }; | |
| 75 | |
| 76 | |
|
47
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
77 static int FMT_init(void) |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
78 { |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
79 /* do any global decoder/library initialization you need here. */ |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
80 |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
81 return(1); /* initialization successful. */ |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
82 } /* FMT_init */ |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
83 |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
84 |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
85 static void FMT_quit(void) |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
86 { |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
87 /* do any global decoder/library cleanup you need here. */ |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
88 } /* FMT_quit */ |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
89 |
|
ea58bc3b15d7
Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents:
21
diff
changeset
|
90 |
| 16 | 91 static int FMT_open(Sound_Sample *sample, const char *ext) |
| 92 { | |
|
21
d9b9d60cf9a9
Added some helpful info to FMT_open()...
Ryan C. Gordon <icculus@icculus.org>
parents:
16
diff
changeset
|
93 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; |
|
d9b9d60cf9a9
Added some helpful info to FMT_open()...
Ryan C. Gordon <icculus@icculus.org>
parents:
16
diff
changeset
|
94 SDL_RWops *rw = internal->rw; |
|
d9b9d60cf9a9
Added some helpful info to FMT_open()...
Ryan C. Gordon <icculus@icculus.org>
parents:
16
diff
changeset
|
95 |
| 16 | 96 if (can NOT accept the data) |
| 97 { | |
| 98 Sound_SetError("FMT: expected X, got Y."); | |
| 99 return(0); | |
| 100 } /* if */ | |
| 101 | |
|
62
b13fafb976be
Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
parents:
47
diff
changeset
|
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 | |
|
64
40006625142a
Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents:
62
diff
changeset
|
146 #endif /* SOUND_SUPPORTS_FMT */ |
|
40006625142a
Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents:
62
diff
changeset
|
147 |
| 16 | 148 |
| 149 /* end of fmt.c ... */ | |
| 150 |