Mercurial > SDL_sound_CoreAudio
annotate decoders/skeleton.c @ 39:eeb874083218
Temporary addition of multiple-streams-in-one-RWops support.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 20 Sep 2001 07:57:29 +0000 |
| parents | d9b9d60cf9a9 |
| children | ea58bc3b15d7 |
| 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 | |
| 32 #include <stdio.h> | |
| 33 #include <stdlib.h> | |
| 34 #include <string.h> | |
| 35 #include <assert.h> | |
| 36 #include "SDL_sound.h" | |
| 37 | |
| 38 #define __SDL_SOUND_INTERNAL__ | |
| 39 #include "SDL_sound_internal.h" | |
| 40 | |
| 41 #if (!defined SOUND_SUPPORTS_FMT) | |
| 42 #error SOUND_SUPPORTS_FMT must be defined. | |
| 43 #endif | |
| 44 | |
| 45 | |
| 46 static int FMT_open(Sound_Sample *sample, const char *ext); | |
| 47 static void FMT_close(Sound_Sample *sample); | |
| 48 static Uint32 FMT_read(Sound_Sample *sample); | |
| 49 | |
| 50 const Sound_DecoderFunctions __Sound_DecoderFunctions_FMT = | |
| 51 { | |
| 52 { | |
| 53 "FMT", | |
| 54 "FMT audio format description", | |
| 55 "Ryan C. Gordon <icculus@clutteredmind.org>", | |
| 56 "http://www.icculus.org/SDL_sound/" | |
| 57 }, | |
| 58 | |
| 59 FMT_open, /* open() method */ | |
| 60 FMT_close, /* close() method */ | |
| 61 FMT_read /* read() method */ | |
| 62 }; | |
| 63 | |
| 64 | |
| 65 static int FMT_open(Sound_Sample *sample, const char *ext) | |
| 66 { | |
|
21
d9b9d60cf9a9
Added some helpful info to FMT_open()...
Ryan C. Gordon <icculus@icculus.org>
parents:
16
diff
changeset
|
67 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
|
68 SDL_RWops *rw = internal->rw; |
|
d9b9d60cf9a9
Added some helpful info to FMT_open()...
Ryan C. Gordon <icculus@icculus.org>
parents:
16
diff
changeset
|
69 |
| 16 | 70 if (can NOT accept the data) |
| 71 { | |
| 72 Sound_SetError("FMT: expected X, got Y."); | |
| 73 return(0); | |
| 74 } /* if */ | |
| 75 | |
| 76 _D(("FMT: Accepting data stream.\n")); | |
| 77 set up sample->actual; | |
| 78 sample->flags = SOUND_SAMPLEFLAG_NONE; | |
| 79 return(1); /* we'll handle this data. */ | |
| 80 } /* FMT_open */ | |
| 81 | |
| 82 | |
| 83 static void FMT_close(Sound_Sample *sample) | |
| 84 { | |
| 85 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 86 clean up anything you put into internal->decoder_private; | |
| 87 } /* FMT_close */ | |
| 88 | |
| 89 | |
| 90 static Uint32 FMT_read(Sound_Sample *sample) | |
| 91 { | |
| 92 Uint32 retval; | |
| 93 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque; | |
| 94 | |
| 95 /* | |
| 96 * We don't actually do any decoding, so we read the fmt data | |
| 97 * directly into the internal buffer... | |
| 98 */ | |
| 99 retval = SDL_RWread(internal->rw, internal->buffer, | |
| 100 1, internal->buffer_size); | |
| 101 | |
| 102 (or whatever. Do some decoding here...) | |
| 103 | |
| 104 /* Make sure the read went smoothly... */ | |
| 105 if (retval == 0) | |
| 106 sample->flags |= SOUND_SAMPLEFLAG_EOF; | |
| 107 | |
| 108 else if (retval == -1) | |
| 109 sample->flags |= SOUND_SAMPLEFLAG_ERROR; | |
| 110 | |
| 111 /* (next call this EAGAIN may turn into an EOF or error.) */ | |
| 112 else if (retval < internal->buffer_size) | |
| 113 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN; | |
| 114 | |
| 115 (or whatever. retval == number of bytes you put in internal->buffer). | |
| 116 | |
| 117 return(retval); | |
| 118 } /* FMT_read */ | |
| 119 | |
| 120 | |
| 121 /* end of fmt.c ... */ | |
| 122 |