SDL_sound_CoreAudio: decoders/coreaudio.c annotate

annotate decoders/coreaudio.c @ 584:2e5e01679f32

Minor changes to mpg123.c to compile with Visual Studio and modern mpg123.c instead of bundled version.

author	Eric Wing <ewing@anscamobile.com>
date	Wed, 27 Apr 2011 19:13:29 -0700
parents	6927c489964c
children	2264b134b7ac

rev	line source
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	1 /*
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	2 * SDL_sound Core Audio backend
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	3 * Copyright (C) 2010 Eric Wing <ewing . public @ playcontrol.net>
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	4 *
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	7 * License as published by the Free Software Foundation; either
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	8 * version 2.1 of the License, or (at your option) any later version.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	9 *
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	13 * Lesser General Public License for more details.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	14 *
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	18 */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	19
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	20 #if HAVE_CONFIG_H
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	21 # include <config.h>
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	22 #endif
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	23
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	24 #ifdef SOUND_SUPPORTS_COREAUDIO
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	25
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	26 #include <stddef.h> /* NULL */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	27 #include <stdio.h> /* printf */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	28 #include <arpa/inet.h> /* htonl */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	29 #include <AudioToolbox/AudioToolbox.h>
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	30
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	31 #include "SDL_sound.h"
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	32
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	33 #define __SDL_SOUND_INTERNAL__
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	34 #include "SDL_sound_internal.h"
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	35
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	36 typedef struct CoreAudioFileContainer
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	37 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	38 AudioFileID* audioFileID;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	39 ExtAudioFileRef extAudioFileRef;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	40 AudioStreamBasicDescription* outputFormat;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	41 } CoreAudioFileContainer;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	42
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	43 static int CoreAudio_init(void);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	44 static void CoreAudio_quit(void);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	45 static int CoreAudio_open(Sound_Sample sample, const char ext);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	46 static void CoreAudio_close(Sound_Sample *sample);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	47 static Uint32 CoreAudio_read(Sound_Sample *sample);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	48 static int CoreAudio_rewind(Sound_Sample *sample);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	49 static int CoreAudio_seek(Sound_Sample *sample, Uint32 ms);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	50
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	51 static const char *extensions_coreaudio[] =
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	52 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	53 "aif",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	54 "aiff",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	55 "aifc",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	56 "wav",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	57 "wave",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	58 "mp3",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	59 "mp4",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	60 "m4a",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	61 "aac",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	62 "caf",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	63 "Sd2f",
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	64 "Sd2",
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	65 "au",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	66 "next",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	67 "mp2",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	68 "mp1",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	69 "ac3",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	70 "3gpp",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	71 "3gp2",
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	72 "amrf",
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	73 "amr",
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	74 "ima4",
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	75 "ima",
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	76 NULL
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	77 };
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	78 const Sound_DecoderFunctions __Sound_DecoderFunctions_CoreAudio =
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	79 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	80 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	81 extensions_coreaudio,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	82 "Decode audio through Core Audio through",
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	83 "Eric Wing <ewing . public @ playcontrol.net>",
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	84 "http://playcontrol.net"
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	85 },
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	86
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	87 CoreAudio_init, /* init() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	88 CoreAudio_quit, /* quit() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	89 CoreAudio_open, /* open() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	90 CoreAudio_close, /* close() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	91 CoreAudio_read, /* read() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	92 CoreAudio_rewind, /* rewind() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	93 CoreAudio_seek /* seek() method */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	94 };
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	95
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	96
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	97 static int CoreAudio_init(void)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	98 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	99 return(1); /* always succeeds. */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	100 } /* CoreAudio_init */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	101
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	102
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	103 static void CoreAudio_quit(void)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	104 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	105 /* it's a no-op. */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	106 } /* CoreAudio_quit */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	107
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	108 /*
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	109 http://developer.apple.com/library/ios/#documentation/MusicAudio/Reference/AudioFileConvertRef/Reference/reference.html
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	110 kAudioFileAIFFType = 'AIFF',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	111 kAudioFileAIFCType = 'AIFC',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	112 kAudioFileWAVEType = 'WAVE',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	113 kAudioFileSoundDesigner2Type = 'Sd2f',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	114 kAudioFileNextType = 'NeXT',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	115 kAudioFileMP3Type = 'MPG3',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	116 kAudioFileMP2Type = 'MPG2',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	117 kAudioFileMP1Type = 'MPG1',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	118 kAudioFileAC3Type = 'ac-3',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	119 kAudioFileAAC_ADTSType = 'adts',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	120 kAudioFileMPEG4Type = 'mp4f',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	121 kAudioFileM4AType = 'm4af',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	122 kAudioFileCAFType = 'caff',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	123 kAudioFile3GPType = '3gpp',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	124 kAudioFile3GP2Type = '3gp2',
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	125 kAudioFileAMRType = 'amrf'
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	126 */
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	127 static AudioFileTypeID CoreAudio_GetAudioTypeForExtension(const char* file_extension)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	128 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	129 if( (__Sound_strcasecmp(file_extension, "aif") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	130 \|\| (__Sound_strcasecmp(file_extension, "aiff") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	131 \|\| (__Sound_strcasecmp(file_extension, "aifc") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	132 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	133 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	134 return kAudioFileAIFCType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	135 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	136 else if( (__Sound_strcasecmp(file_extension, "wav") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	137 \|\| (__Sound_strcasecmp(file_extension, "wave") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	138 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	139 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	140 return kAudioFileWAVEType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	141 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	142 else if( (__Sound_strcasecmp(file_extension, "mp3") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	143 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	144 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	145 return kAudioFileMP3Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	146 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	147 else if( (__Sound_strcasecmp(file_extension, "mp4") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	148 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	149 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	150 return kAudioFileMPEG4Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	151 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	152 else if( (__Sound_strcasecmp(file_extension, "m4a") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	153 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	154 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	155 return kAudioFileM4AType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	156 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	157 else if( (__Sound_strcasecmp(file_extension, "aac") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	158 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	159 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	160 return kAudioFileAAC_ADTSType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	161 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	162 else if( (__Sound_strcasecmp(file_extension, "aac") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	163 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	164 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	165 return kAudioFileAAC_ADTSType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	166 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	167 else if( (__Sound_strcasecmp(file_extension, "caf") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	168 \|\| (__Sound_strcasecmp(file_extension, "caff") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	169 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	170 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	171 return kAudioFileCAFType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	172 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	173 else if( (__Sound_strcasecmp(file_extension, "Sd2f") == 0)
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	174 \|\| (__Sound_strcasecmp(file_extension, "sd2") == 0)
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	175 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	176 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	177 return kAudioFileSoundDesigner2Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	178 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	179 else if( (__Sound_strcasecmp(file_extension, "au") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	180 \|\| (__Sound_strcasecmp(file_extension, "next") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	181 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	182 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	183 return kAudioFileNextType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	184 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	185 else if( (__Sound_strcasecmp(file_extension, "mp2") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	186 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	187 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	188 return kAudioFileMP2Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	189 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	190 else if( (__Sound_strcasecmp(file_extension, "mp1") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	191 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	192 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	193 return kAudioFileMP1Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	194 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	195 else if( (__Sound_strcasecmp(file_extension, "ac3") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	196 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	197 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	198 return kAudioFileAC3Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	199 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	200 else if( (__Sound_strcasecmp(file_extension, "3gpp") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	201 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	202 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	203 return kAudioFile3GPType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	204 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	205 else if( (__Sound_strcasecmp(file_extension, "3gp2") == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	206 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	207 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	208 return kAudioFile3GP2Type;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	209 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	210 else if( (__Sound_strcasecmp(file_extension, "amrf") == 0)
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	211 \|\| (__Sound_strcasecmp(file_extension, "amr") == 0)
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	212 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	213 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	214 return kAudioFileAMRType;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	215 }
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	216 else if( (__Sound_strcasecmp(file_extension, "ima4") == 0)
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	217 \|\| (__Sound_strcasecmp(file_extension, "ima") == 0)
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	218 )
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	219 {
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	220 /* not sure about this one */
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	221 return kAudioFileCAFType;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	222 }
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	223 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	224 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	225 return 0;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	226 }
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	227
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	228 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	229
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	230 static const char* CoreAudio_FourCCToString(int32_t error_code)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	231 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	232 static char return_string[16];
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	233 uint32_t big_endian_code = htonl(error_code);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	234 char* big_endian_str = (char*)&big_endian_code;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	235 // see if it appears to be a 4-char-code
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	236 if(isprint(big_endian_str[0])
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	237 && isprint(big_endian_str[1])
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	238 && isprint(big_endian_str[2])
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	239 && isprint (big_endian_str[3]))
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	240 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	241 return_string[0] = '\'';
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	242 return_string[1] = big_endian_str[0];
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	243 return_string[2] = big_endian_str[1];
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	244 return_string[3] = big_endian_str[2];
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	245 return_string[4] = big_endian_str[3];
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	246 return_string[5] = '\'';
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	247 return_string[6] = '\0';
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	248 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	249 else if(error_code > -200000 && error_code < 200000)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	250 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	251 // no, format it as an integer
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	252 snprintf(return_string, 16, "%d", error_code);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	253 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	254 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	255 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	256 // no, format it as an integer but in hex
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	257 snprintf(return_string, 16, "0x%x", error_code);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	258 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	259 return return_string;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	260 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	261
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	262
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	263
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	264 SInt64 CoreAudio_SizeCallback(void* inClientData)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	265 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	266 SDL_RWops* rw_ops = (SDL_RWops*)inClientData;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	267 SInt64 current_position = SDL_RWtell(rw_ops);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	268 SInt64 end_position = SDL_RWseek(rw_ops, 0, SEEK_END);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	269 SDL_RWseek(rw_ops, current_position, SEEK_SET);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	270 // fprintf(stderr, "CoreAudio_SizeCallback:%d\n", end_position);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	271
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	272 return end_position;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	273 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	274
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	275 OSStatus CoreAudio_ReadCallback(
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	276 void* inClientData,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	277 SInt64 inPosition,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	278 UInt32 requestCount,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	279 void* data_buffer,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	280 UInt32* actualCount
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	281 )
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	282 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	283 SDL_RWops* rw_ops = (SDL_RWops*)inClientData;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	284 SDL_RWseek(rw_ops, inPosition, SEEK_SET);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	285 size_t bytes_actually_read = SDL_RWread(rw_ops, data_buffer, 1, requestCount);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	286 // Not sure how to test for a read error with SDL_RWops
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	287 // fprintf(stderr, "CoreAudio_ReadCallback:%d, %d\n", requestCount, bytes_actually_read);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	288
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	289 *actualCount = bytes_actually_read;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	290 return noErr;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	291 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	292
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	293
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	294 static int CoreAudio_open(Sound_Sample sample, const char ext)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	295 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	296 CoreAudioFileContainer* core_audio_file_container;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	297 AudioFileID* audio_file_id;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	298 OSStatus error_result;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	299 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	300 AudioStreamBasicDescription actual_format;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	301 AudioStreamBasicDescription output_format;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	302 Float64 estimated_duration;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	303 UInt32 format_size;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	304
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	305
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	306 core_audio_file_container = (CoreAudioFileContainer*)malloc(sizeof(CoreAudioFileContainer));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	307 BAIL_IF_MACRO(core_audio_file_container == NULL, ERR_OUT_OF_MEMORY, 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	308
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	309
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	310 audio_file_id = (AudioFileID*)malloc(sizeof(AudioFileID));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	311 BAIL_IF_MACRO(audio_file_id == NULL, ERR_OUT_OF_MEMORY, 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	312
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	313 error_result = AudioFileOpenWithCallbacks(
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	314 internal->rw,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	315 CoreAudio_ReadCallback,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	316 NULL,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	317 CoreAudio_SizeCallback,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	318 NULL,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	319 CoreAudio_GetAudioTypeForExtension(ext),
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	320 audio_file_id
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	321 );
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	322 if (error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	323 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	324 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	325 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	326 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	327 SNDDBG(("Core Audio: can't grok data. reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	328 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	329 } /* if */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	330
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	331 format_size = sizeof(actual_format);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	332 error_result = AudioFileGetProperty(
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	333 *audio_file_id,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	334 kAudioFilePropertyDataFormat,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	335 &format_size,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	336 &actual_format
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	337 );
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	338 if (error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	339 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	340 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	341 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	342 free(core_audio_file_container);
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	343 SNDDBG(("Core Audio: AudioFileGetProperty failed. reason: [%s]", CoreAudio_FourCCToString(error_result)));
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	344 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	345 } /* if */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	346
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	347 format_size = sizeof(estimated_duration);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	348 error_result = AudioFileGetProperty(
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	349 *audio_file_id,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	350 kAudioFilePropertyEstimatedDuration,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	351 &format_size,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	352 &estimated_duration
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	353 );
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	354 if (error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	355 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	356 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	357 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	358 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	359 SNDDBG(("Core Audio: AudioFileGetProperty failed. reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	360 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	361 } /* if */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	362
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	363
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	364 core_audio_file_container->audioFileID = audio_file_id;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	365
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	366 internal->decoder_private = core_audio_file_container;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	367
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	368 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	369 sample->actual.rate = (UInt32) actual_format.mSampleRate;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	370 sample->actual.channels = (UInt8)actual_format.mChannelsPerFrame;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	371 internal->total_time = (SInt32)(estimated_duration * 1000.0 + 0.5);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	372
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	373 #if 0
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	374 /* FIXME: Both Core Audio and SDL 1.3 support float and 32-bit formats */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	375 if(actual_format.mFormatFlags & kAudioFormatFlagIsBigEndian)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	376 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	377 if(16 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	378 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	379 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	380 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	381 sample->actual.format = AUDIO_S16MSB;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	382 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	383 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	384 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	385 sample->actual.format = AUDIO_U16MSB;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	386 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	387 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	388 else if(8 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	389 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	390 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	391 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	392 sample->actual.format = AUDIO_S8;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	393 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	394 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	395 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	396 sample->actual.format = AUDIO_U8;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	397 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	398 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	399 else // might be 0 for undefined?
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	400 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	401 // This case seems to come up a lot for me. Maybe for file types like .m4a?
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	402 sample->actual.format = AUDIO_S16SYS;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	403 SNDDBG(("Core Audio: Unsupported actual_format.mBitsPerChannel: [%d].\n", actual_format.mBitsPerChannel));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	404
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	405 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	406 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	407 else // little endian
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	408 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	409 if(16 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	410 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	411 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	412 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	413 sample->actual.format = AUDIO_S16LSB;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	414 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	415 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	416 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	417 sample->actual.format = AUDIO_U16LSB;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	418 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	419 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	420 else if(8 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	421 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	422 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	423 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	424 sample->actual.format = AUDIO_S8;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	425 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	426 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	427 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	428 sample->actual.format = AUDIO_U8;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	429 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	430 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	431 else // might be 0 for undefined?
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	432 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	433 sample->actual.format = AUDIO_S16SYS;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	434
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	435 SNDDBG(("Core Audio: Unsupported actual_format.mBitsPerChannel: [%d].\n", actual_format.mBitsPerChannel));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	436 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	437
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	438 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	439 #else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	440
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	441
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	442
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	443 /*
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	444 * I want to use Core Audio to do conversion and decoding for performance reasons.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	445 * This is particularly important on mobile devices like iOS.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	446 * Taking from the Ogg Vorbis decode, I pretend the "actual" format is the same
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	447 * as the desired format.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	448 */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	449 sample->actual.format = (sample->desired.format == 0) ?
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	450 AUDIO_S16SYS : sample->desired.format;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	451 #endif
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	452
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	453
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	454 SNDDBG(("CoreAudio: channels == (%d).\n", sample->actual.channels));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	455 SNDDBG(("CoreAudio: sampling rate == (%d).\n",sample->actual.rate));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	456 SNDDBG(("CoreAudio: total seconds of sample == (%d).\n", internal->total_time));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	457 SNDDBG(("CoreAudio: sample->actual.format == (%d).\n", sample->actual.format));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	458
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	459
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	460
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	461 error_result = ExtAudioFileWrapAudioFileID(*audio_file_id,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	462 false, // set to false for read-only
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	463 &core_audio_file_container->extAudioFileRef
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	464 );
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	465 if(error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	466 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	467 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	468 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	469 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	470 SNDDBG(("Core Audio: can't wrap data. reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	471 BAIL_MACRO("Core Audio: Failed to wrap data.", 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	472 } /* if */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	473
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	474
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	475 /* The output format must be linear PCM because that's the only type OpenAL knows how to deal with.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	476 * Set the client format to 16 bit signed integer (native-endian) data because that is the most
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	477 * optimal format on iPhone/iPod Touch hardware.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	478 * Maintain the channel count and sample rate of the original source format.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	479 */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	480 output_format.mSampleRate = actual_format.mSampleRate; // preserve the original sample rate
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	481 output_format.mChannelsPerFrame = actual_format.mChannelsPerFrame; // preserve the number of channels
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	482 output_format.mFormatID = kAudioFormatLinearPCM; // We want linear PCM data
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	483 output_format.mFramesPerPacket = 1; // We know for linear PCM, the definition is 1 frame per packet
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	484
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	485 if(sample->desired.format == 0)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	486 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	487 // do AUDIO_S16SYS
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	488 output_format.mFormatFlags = kAudioFormatFlagsNativeEndian \| kAudioFormatFlagIsSignedInteger \| kAudioFormatFlagIsPacked; // I seem to read failures problems without kAudioFormatFlagIsPacked. From a mailing list post, this seems to be a Core Audio bug.
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	489 output_format.mBitsPerChannel = 16; // We know we want 16-bit
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	490 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	491 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	492 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	493 output_format.mFormatFlags = 0; // clear flags
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	494 output_format.mFormatFlags \|= kAudioFormatFlagIsPacked; // I seem to read failures problems without kAudioFormatFlagIsPacked. From a mailing list post, this seems to be a Core Audio bug.
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	495 // Mask against bitsize
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	496 if(0xFF & sample->desired.format)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	497 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	498 output_format.mBitsPerChannel = 16; /* 16-bit */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	499 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	500 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	501 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	502 output_format.mBitsPerChannel = 8; /* 8-bit */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	503 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	504
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	505 // Mask for signed/unsigned
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	506 if((1<<15) & sample->desired.format)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	507 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	508 output_format.mFormatFlags = output_format.mFormatFlags \| kAudioFormatFlagIsSignedInteger;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	509
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	510 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	511 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	512 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	513 // no flag set for unsigned
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	514 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	515 // Mask for big/little endian
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	516 if((1<<12) & sample->desired.format)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	517 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	518 output_format.mFormatFlags = output_format.mFormatFlags \| kAudioFormatFlagIsBigEndian;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	519 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	520 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	521 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	522 // no flag set for little endian
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	523 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	524 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	525
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	526 output_format.mBytesPerPacket = output_format.mBitsPerChannel/8 * output_format.mChannelsPerFrame; // e.g. 16-bits/8 * channels => so 2-bytes per channel per frame
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	527 output_format.mBytesPerFrame = output_format.mBitsPerChannel/8 * output_format.mChannelsPerFrame; // For PCM, since 1 frame is 1 packet, it is the same as mBytesPerPacket
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	528
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	529
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	530 /*
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	531 output_format.mSampleRate = actual_format.mSampleRate; // preserve the original sample rate
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	532 output_format.mChannelsPerFrame = actual_format.mChannelsPerFrame; // preserve the number of channels
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	533 output_format.mFormatID = kAudioFormatLinearPCM; // We want linear PCM data
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	534 // output_format.mFormatFlags = kAudioFormatFlagsNativeEndian \| kAudioFormatFlagIsPacked \| kAudioFormatFlagIsSignedInteger;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	535 output_format.mFormatFlags = kAudioFormatFlagsNativeEndian \| kAudioFormatFlagIsSignedInteger;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	536 output_format.mFramesPerPacket = 1; // We know for linear PCM, the definition is 1 frame per packet
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	537 output_format.mBitsPerChannel = 16; // We know we want 16-bit
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	538 output_format.mBytesPerPacket = 2 * output_format.mChannelsPerFrame; // We know we are using 16-bit, so 2-bytes per channel per frame
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	539 output_format.mBytesPerFrame = 2 * output_format.mChannelsPerFrame; // For PCM, since 1 frame is 1 packet, it is the same as mBytesPerPacket
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	540 */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	541 SNDDBG(("output_format: mSampleRate: %lf\n", output_format.mSampleRate));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	542 SNDDBG(("output_format: mChannelsPerFrame: %d\n", output_format.mChannelsPerFrame));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	543 SNDDBG(("output_format: mFormatID: %d\n", output_format.mFormatID));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	544 SNDDBG(("output_format: mFormatFlags: %d\n", output_format.mFormatFlags));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	545 SNDDBG(("output_format: mFramesPerPacket: %d\n", output_format.mFramesPerPacket));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	546 SNDDBG(("output_format: mBitsPerChannel: %d\n", output_format.mBitsPerChannel));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	547 SNDDBG(("output_format: mBytesPerPacket: %d\n", output_format.mBytesPerPacket));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	548 SNDDBG(("output_format: mBytesPerFrame: %d\n", output_format.mBytesPerFrame));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	549
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	550
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	551 /* Set the desired client (output) data format */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	552 error_result = ExtAudioFileSetProperty(core_audio_file_container->extAudioFileRef, kExtAudioFileProperty_ClientDataFormat, sizeof(output_format), &output_format);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	553 if(noErr != error_result)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	554 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	555 ExtAudioFileDispose(core_audio_file_container->extAudioFileRef);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	556 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	557 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	558 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	559 SNDDBG(("Core Audio: ExtAudioFileSetProperty(kExtAudioFileProperty_ClientDataFormat) failed, reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	560 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	561 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	562
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	563
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	564 core_audio_file_container->outputFormat = (AudioStreamBasicDescription*)malloc(sizeof(AudioStreamBasicDescription));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	565 BAIL_IF_MACRO(core_audio_file_container->outputFormat == NULL, ERR_OUT_OF_MEMORY, 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	566
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	567
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	568
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	569 /* Copy the output format to the audio_description that was passed in so the
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	570 * info will be returned to the user.
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	571 */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	572 memcpy(core_audio_file_container->outputFormat, &output_format, sizeof(AudioStreamBasicDescription));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	573
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	574
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	575
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	576 return(1);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	577 } /* CoreAudio_open */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	578
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	579
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	580 static void CoreAudio_close(Sound_Sample *sample)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	581 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	582 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	583 CoreAudioFileContainer* core_audio_file_container = (CoreAudioFileContainer *) internal->decoder_private;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	584
578 7ff36153215a Fixed 48-byte memory leak. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 577 diff changeset	585 free(core_audio_file_container->outputFormat);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	586 ExtAudioFileDispose(core_audio_file_container->extAudioFileRef);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	587 AudioFileClose(*core_audio_file_container->audioFileID);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	588 free(core_audio_file_container->audioFileID);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	589 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	590
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	591 } /* CoreAudio_close */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	592
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	593
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	594 static Uint32 CoreAudio_read(Sound_Sample *sample)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	595 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	596 OSStatus error_result = noErr;
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	597 /* Documentation/example shows SInt64, but is problematic for big endian
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	598 * on 32-bit cast for ExtAudioFileRead() because it takes the upper
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	599 * bits which turn to 0.
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	600 */
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	601 UInt32 buffer_size_in_frames = 0;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	602 UInt32 buffer_size_in_frames_remaining = 0;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	603 UInt32 total_frames_read = 0;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	604 UInt32 data_buffer_size = 0;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	605 UInt32 bytes_remaining = 0;
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	606 size_t total_bytes_read = 0;
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	607 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	608 CoreAudioFileContainer* core_audio_file_container = (CoreAudioFileContainer *) internal->decoder_private;
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	609 UInt32 max_buffer_size = internal->buffer_size;
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	610
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	611 // printf("internal->buffer_size=%d, internal->buffer=0x%x, sample->buffer_size=%d\n", internal->buffer_size, internal->buffer, sample->buffer_size);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	612 // printf("internal->max_buffer_size=%d\n", max_buffer_size);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	613
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	614 /* Compute how many frames will fit into our max buffer size */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	615 /* Warning: If this is not evenly divisible, the buffer will not be completely filled which violates the SDL_sound assumption. */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	616 buffer_size_in_frames = max_buffer_size / core_audio_file_container->outputFormat->mBytesPerFrame;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	617 // printf("buffer_size_in_frames=%ld, internal->buffer_size=%d, internal->buffer=0x%x outputFormat->mBytesPerFrame=%d, sample->buffer_size=%d\n", buffer_size_in_frames, internal->buffer_size, internal->buffer, core_audio_file_container->outputFormat->mBytesPerFrame, sample->buffer_size);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	618
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	619
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	620 // void* temp_buffer = malloc(max_buffer_size);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	621
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	622 AudioBufferList audio_buffer_list;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	623 audio_buffer_list.mNumberBuffers = 1;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	624 audio_buffer_list.mBuffers[0].mDataByteSize = max_buffer_size;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	625 audio_buffer_list.mBuffers[0].mNumberChannels = core_audio_file_container->outputFormat->mChannelsPerFrame;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	626 audio_buffer_list.mBuffers[0].mData = internal->buffer;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	627
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	628
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	629 bytes_remaining = max_buffer_size;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	630 buffer_size_in_frames_remaining = buffer_size_in_frames;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	631
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	632 // oops. Due to the kAudioFormatFlagIsPacked bug,
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	633 // I was misled to believe that Core Audio
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	634 // was not always filling my entire requested buffer.
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	635 // So this while-loop might be unnecessary.
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	636 // However, I have not exhaustively tested all formats,
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	637 // so maybe it is possible this loop is useful.
af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	638 // It might also handle the not-evenly disvisible case above.
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	639 while(buffer_size_in_frames_remaining > 0 && !(sample->flags & SOUND_SAMPLEFLAG_EOF))
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	640 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	641
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	642 data_buffer_size = (UInt32)(buffer_size_in_frames * core_audio_file_container->outputFormat->mBytesPerFrame);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	643 // printf("data_buffer_size=%d\n", data_buffer_size);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	644
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	645 buffer_size_in_frames = buffer_size_in_frames_remaining;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	646
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	647 // printf("reading buffer_size_in_frames=%"PRId64"\n", buffer_size_in_frames);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	648
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	649
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	650 audio_buffer_list.mBuffers[0].mDataByteSize = bytes_remaining;
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	651 audio_buffer_list.mBuffers[0].mData = &(((UInt8*)internal->buffer)[total_bytes_read]);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	652
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	653
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	654 /* Read the data into an AudioBufferList */
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	655 error_result = ExtAudioFileRead(core_audio_file_container->extAudioFileRef, &buffer_size_in_frames, &audio_buffer_list);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	656 if(error_result == noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	657 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	658
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	659
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	660 /* Success */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	661
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	662 total_frames_read += buffer_size_in_frames;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	663 buffer_size_in_frames_remaining = buffer_size_in_frames_remaining - buffer_size_in_frames;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	664
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	665 // printf("read buffer_size_in_frames=%"PRId64", buffer_size_in_frames_remaining=%"PRId64"\n", buffer_size_in_frames, buffer_size_in_frames_remaining);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	666
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	667 /* ExtAudioFileRead returns the number of frames actually read. Need to convert back to bytes. */
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	668 data_buffer_size = (UInt32)(buffer_size_in_frames * core_audio_file_container->outputFormat->mBytesPerFrame);
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	669 // printf("data_buffer_size=%d\n", data_buffer_size);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	670
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	671 total_bytes_read += data_buffer_size;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	672 bytes_remaining = bytes_remaining - data_buffer_size;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	673
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	674 /* Note: 0 == buffer_size_in_frames is a legitimate value meaning we are EOF. */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	675 if(0 == buffer_size_in_frames)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	676 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	677 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	678 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	679
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	680 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	681 else
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	682 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	683 SNDDBG(("Core Audio: ExtAudioFileReadfailed, reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	684
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	685 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	686 break;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	687
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	688 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	689 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	690
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	691 if( (!(sample->flags & SOUND_SAMPLEFLAG_EOF)) && (total_bytes_read < max_buffer_size))
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	692 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	693 SNDDBG(("Core Audio: ExtAudioFileReadfailed SOUND_SAMPLEFLAG_EAGAIN, reason: [total_bytes_read < max_buffer_size], %d, %d.\n", total_bytes_read , max_buffer_size));
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	694
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	695 /* Don't know what to do here. */
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	696 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	697 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	698 return total_bytes_read;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	699 } /* CoreAudio_read */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	700
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	701
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	702 static int CoreAudio_rewind(Sound_Sample *sample)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	703 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	704 OSStatus error_result = noErr;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	705 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	706 CoreAudioFileContainer* core_audio_file_container = (CoreAudioFileContainer *) internal->decoder_private;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	707
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	708 error_result = ExtAudioFileSeek(core_audio_file_container->extAudioFileRef, 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	709 if(error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	710 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	711 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	712 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	713 return(1);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	714 } /* CoreAudio_rewind */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	715
579 6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	716 /* Note: I found this tech note:
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	717 http://developer.apple.com/library/mac/#qa/qa2009/qa1678.html
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	718 I don't know if this applies to us. So far, I haven't noticed the problem,
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	719 so I haven't applied any of the techniques.
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	720 */
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	721 static int CoreAudio_seek(Sound_Sample *sample, Uint32 ms)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	722 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	723 OSStatus error_result = noErr;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	724 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	725 CoreAudioFileContainer* core_audio_file_container = (CoreAudioFileContainer *) internal->decoder_private;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	726 SInt64 frame_offset = 0;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	727 AudioStreamBasicDescription actual_format;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	728 UInt32 format_size;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	729
579 6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	730
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	731 /* I'm confused. The Apple documentation says this:
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	732 "Seek position is specified in the sample rate and frame count of the file’s audio data format
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	733 — not your application’s audio data format."
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	734 My interpretation is that I want to get the "actual format of the file and compute the frame offset.
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	735 But when I try that, seeking goes to the wrong place.
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	736 When I use outputFormat, things seem to work correctly.
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	737 I must be misinterpreting the documentation or doing something wrong.
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	738 */
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	739 #if 0 /* not working */
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	740 format_size = sizeof(AudioStreamBasicDescription);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	741 error_result = AudioFileGetProperty(
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	742 *core_audio_file_container->audioFileID,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	743 kAudioFilePropertyDataFormat,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	744 &format_size,
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	745 &actual_format
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	746 );
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	747 if(error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	748 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	749 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	750 BAIL_MACRO("Core Audio: Could not GetProperty for kAudioFilePropertyDataFormat.", 0);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	751 } /* if */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	752
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	753 // packetIndex = (pos * sampleRate) / framesPerPacket
579 6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	754 // frame_offset = (SInt64)((ms/1000.0 * actual_format.mSampleRate) / actual_format.mFramesPerPacket);
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	755 #else /* seems to work, but I'm confused */
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	756 // packetIndex = (pos * sampleRate) / framesPerPacket
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	757 frame_offset = (SInt64)((ms/1000.0 * core_audio_file_container->outputFormat->mSampleRate) / core_audio_file_container->outputFormat->mFramesPerPacket);
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	758 #endif
6927c489964c Bug fix for CoreAudio seeking. Comments inline in code. Eric Wing <ewing@anscamobile.com> parents: 578 diff changeset	759
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	760 // computed against actual format and not the client format
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	761 error_result = ExtAudioFileSeek(core_audio_file_container->extAudioFileRef, frame_offset);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	762 if(error_result != noErr)
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	763 {
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	764 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	765 }
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	766
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	767 return(1);
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	768 } /* CoreAudio_seek */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	769
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	770 #endif /* SOUND_SUPPORTS_COREAUDIO */
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	771
8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	772
577 af33b35a55c1 Minor cleanups. Ready to release. Eric Wing <ewing . public \|-at-\| gmail . com> parents: 576 diff changeset	773 /* end of coreaudio.c ... */
576 8d62447b75f2 Added new Core Audio backend. Eric Wing <ewing . public \|-at-\| gmail . com> parents: diff changeset	774

Mercurial > SDL_sound_CoreAudio

annotate decoders/coreaudio.c @ 584:2e5e01679f32