SDL_sound_CoreAudio: decoders/raw.c annotate

annotate decoders/raw.c @ 590:1c8414cd5839

Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.

author	Eric Wing <ewing@anscamobile.com>
date	Wed, 27 Apr 2011 19:37:16 -0700
parents	2e8907ff98e9
children

rev	line source
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	8 * version 2.1 of the License, or (at your option) any later version.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /*
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * RAW decoder for SDL_sound. This is as simple as it gets.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 *
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 * This driver handles raw audio data. You must, regardless of where the
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 * data is actually coming from, specify the string "RAW" in the extension
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 * parameter of Sound_NewSample() (or, alternately, open a file with the
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	26 * extension ".raw" in Sound_NewSampleFromFile()). The string is checked
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27 * case-insensitive. We need this check, because raw data, being raw, has
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 * no headers or magic number we can use to determine if we should handle a
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 * given file, so we needed some way to have this "decoder" discriminate.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30 *
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	31 * When calling Sound_NewSample*(), you must also specify a "desired"
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	32 * audio format. The "actual" format will always match what you specify, so
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	33 * there will be no conversion overhead, but these routines need to know how
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	34 * to treat the bits, since it's all random garbage otherwise.
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	35 *
552 2e8907ff98e9 Replaced references to COPYING with references to LICENSE.txt ... Ryan C. Gordon <icculus@icculus.org> parents: 526 diff changeset	36 * Please see the file LICENSE.txt in the source's root directory.
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	37 *
526 2df1f5c62d38 Updated my email address. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	38 * This file written by Ryan C. Gordon. (icculus@icculus.org)
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39 */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	41 #if HAVE_CONFIG_H
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	42 # include <config.h>
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	43 #endif
100 6d9fdec2f708 added config.h, added --enable-debug flag, various other changes to the build system fingolfin parents: 64 diff changeset	44
104 103cfcb3c014 Updated to fix build system problem. Ryan C. Gordon <icculus@icculus.org> parents: 100 diff changeset	45 #ifdef SOUND_SUPPORTS_RAW
103cfcb3c014 Updated to fix build system problem. Ryan C. Gordon <icculus@icculus.org> parents: 100 diff changeset	46
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	47 #include <stdio.h>
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48 #include <stdlib.h>
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 #include <string.h>
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	51 #include "SDL_sound.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	52
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	53 #define __SDL_SOUND_INTERNAL__
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	54 #include "SDL_sound_internal.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	55
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	56 static int RAW_init(void);
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	57 static void RAW_quit(void);
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 static int RAW_open(Sound_Sample sample, const char ext);
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 static void RAW_close(Sound_Sample *sample);
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	60 static Uint32 RAW_read(Sound_Sample *sample);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	61 static int RAW_rewind(Sound_Sample *sample);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	62 static int RAW_seek(Sound_Sample *sample, Uint32 ms);
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	64 static const char *extensions_raw[] = { "RAW", NULL };
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65 const Sound_DecoderFunctions __Sound_DecoderFunctions_RAW =
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 {
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	67 {
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	68 extensions_raw,
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	69 "Raw audio",
526 2df1f5c62d38 Updated my email address. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	70 "Ryan C. Gordon <icculus@icculus.org>",
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71 "http://www.icculus.org/SDL_sound/"
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72 },
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	73
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	74 RAW_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	75 RAW_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	76 RAW_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	77 RAW_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	78 RAW_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	79 RAW_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	80 RAW_seek /* seek() method */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	81 };
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	82
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	83
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	84 static int RAW_init(void)
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	85 {
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	86 return(1); /* always succeeds. */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	87 } /* RAW_init */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	88
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	89
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	90 static void RAW_quit(void)
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	91 {
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	92 /* it's a no-op. */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	93 } /* RAW_quit */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	94
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 7 diff changeset	95
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	96 static int RAW_open(Sound_Sample sample, const char ext)
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	97 {
474 c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	98 Sound_SampleInternal *internal = sample->opaque;
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	99 SDL_RWops *rw = internal->rw;
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	100 Uint32 pos, sample_rate;
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	101
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	102 /*
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	103 * We check this explicitly, since we have no other way to
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	104 * determine whether we should handle this data or not.
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	105 */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106 if (__Sound_strcasecmp(ext, "RAW") != 0)
387 fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	107 BAIL_MACRO("RAW: extension isn't explicitly \"RAW\".", 0);
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	109 /*
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	110 * You must also specify a desired format, so we know how to
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	111 * treat the bits that are otherwise binary garbage.
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	112 */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 if ( (sample->desired.channels < 1) \|\|
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 (sample->desired.channels > 2) \|\|
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 (sample->desired.rate == 0) \|\|
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 (sample->desired.format == 0) )
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 {
387 fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	118 BAIL_MACRO("RAW: invalid desired format.", 0);
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 } /* if */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120
62 b13fafb976be Changed _D macro to DBGSND. Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	121 SNDDBG(("RAW: Accepting data stream.\n"));
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	122
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	123 /*
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	124 * We never convert raw samples; what you ask for is what you get.
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	125 */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126 memcpy(&sample->actual, &sample->desired, sizeof (Sound_AudioInfo));
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	127 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	128
474 c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	129 if ( (pos = SDL_RWseek(internal->rw, 0, SEEK_END) ) <= 0) {
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	130 BAIL_MACRO("RAW: cannot seek the end of the file \"RAW\".", 0);
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	131 }
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	132 if ( SDL_RWseek(internal->rw, 0, SEEK_SET) ) {
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	133 BAIL_MACRO("RAW: cannot reset file \"RAW\".", 0);
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	134 }
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	135
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	136 sample_rate = (sample->actual.rate * sample->actual.channels
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	137 * ( (sample->actual.format & 0x0018) >> 3) );
477 3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	138 internal->total_time = ( pos ) / sample_rate * 1000;
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	139 internal->total_time += (pos % sample_rate) * 1000 / sample_rate;
474 c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	140
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	141 return(1); /* we'll handle this data. */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	142 } /* RAW_open */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	143
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	144
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	145 static void RAW_close(Sound_Sample *sample)
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	146 {
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	147 /* we don't allocate anything that we need to free. That's easy, eh? */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	148 } /* RAW_close */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	149
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	151 static Uint32 RAW_read(Sound_Sample *sample)
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	152 {
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	153 Uint32 retval;
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	154 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	155
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	156 /*
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	157 * We don't actually do any decoding, so we read the raw data
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	158 * directly into the internal buffer...
29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	159 */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	160 retval = SDL_RWread(internal->rw, internal->buffer,
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	161 1, internal->buffer_size);
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	162
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	163 /* Make sure the read went smoothly... */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	164 if (retval == 0)
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 else if (retval == -1)
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169
7 29313c20963d Updated a lot of comments, and changed read() method's return type. Ryan C. Gordon <icculus@icculus.org> parents: 4 diff changeset	170 /* (next call this EAGAIN may turn into an EOF or error.) */
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	171 else if (retval < internal->buffer_size)
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	172 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	173
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174 return(retval);
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175 } /* RAW_read */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	177
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	178 static int RAW_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	179 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	180 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	181 BAIL_IF_MACRO(SDL_RWseek(internal->rw, 0, SEEK_SET) != 0, ERR_IO_ERROR, 0);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	182 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	183 } /* RAW_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	184
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	185
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	186 static int RAW_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	187 {
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	188 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	189 int pos = (int) __Sound_convertMsToBytePos(&sample->actual, ms);
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	190 int err = (SDL_RWseek(internal->rw, pos, SEEK_SET) != pos);
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	191 BAIL_IF_MACRO(err, ERR_IO_ERROR, 0);
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	192 return(1);
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	193 } /* RAW_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	194
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	195
64 40006625142a Changes in preparation of autoconf support. Ryan C. Gordon <icculus@icculus.org> parents: 62 diff changeset	196 #endif /* SOUND_SUPPORTS_RAW */
40006625142a Changes in preparation of autoconf support. Ryan C. Gordon <icculus@icculus.org> parents: 62 diff changeset	197
4 341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 /* end of raw.c ... */
341cea3e13c6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	200

Mercurial > SDL_sound_CoreAudio

annotate decoders/raw.c @ 590:1c8414cd5839