Mercurial > SDL_sound_CoreAudio

annotate decoders/coreaudio.c @ 591:8faf61a640f0 tip

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Resynced fixes for unit conversion bugs in the Ogg Tremor decoder from SoundDecoder/ALmixer. Ogg Vorbis uses seconds and we multiply by 1000 to convert to milliseconds. But Ogg Tremor already uses milliseconds but I was still multiplying by 1000.
author Eric Wing <ewing . public |-at-| gmail . com>
date Thu, 25 Oct 2012 16:34:18 -0700
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1 /*
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2 * SDL_sound Core Audio backend
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3 * Copyright (C) 2010 Eric Wing <ewing . public @ playcontrol.net>
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4 *
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5 * This library is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU Lesser General Public
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7 * License as published by the Free Software Foundation; either
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8 * version 2.1 of the License, or (at your option) any later version.
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9 *
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10 * This library is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Lesser General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Lesser General Public
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16 * License along with this library; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 #if HAVE_CONFIG_H
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21 # include <config.h>
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22 #endif
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23
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24 #ifdef SOUND_SUPPORTS_COREAUDIO
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25
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26 #include <stddef.h> /* NULL */
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27 #include <stdio.h> /* printf */
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28 #include <arpa/inet.h> /* htonl */
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29 #include <AudioToolbox/AudioToolbox.h>
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30
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31 #include "SDL_sound.h"
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32
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33 #define __SDL_SOUND_INTERNAL__
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34 #include "SDL_sound_internal.h"
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35
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36 typedef struct CoreAudioFileContainer
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37 {
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38 AudioFileID* audioFileID;
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39 ExtAudioFileRef extAudioFileRef;
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40 AudioStreamBasicDescription* outputFormat;
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41 } CoreAudioFileContainer;
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42
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43 static int CoreAudio_init(void);
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44 static void CoreAudio_quit(void);
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45 static int CoreAudio_open(Sound_Sample *sample, const char *ext);
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46 static void CoreAudio_close(Sound_Sample *sample);
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47 static Uint32 CoreAudio_read(Sound_Sample *sample);
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48 static int CoreAudio_rewind(Sound_Sample *sample);
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49 static int CoreAudio_seek(Sound_Sample *sample, Uint32 ms);
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50
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51 static const char *extensions_coreaudio[] =
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52 {
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53 "aif",
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54 "aiff",
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55 "aifc",
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56 "wav",
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57 "wave",
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58 "mp3",
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59 "mp4",
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60 "m4a",
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61 "aac",
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62 "adts",
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63 "caf",
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64 "Sd2f",
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65 "Sd2",
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66 "au",
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67 "snd",
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68 "next",
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69 "mp2",
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70 "mp1",
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71 "ac3",
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72 "3gpp",
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73 "3gp",
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74 "3gp2",
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75 "3g2",
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76 "amrf",
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77 "amr",
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78 "ima4",
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79 "ima",
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80 NULL
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81 };
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82 const Sound_DecoderFunctions __Sound_DecoderFunctions_CoreAudio =
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83 {
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84 {
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85 extensions_coreaudio,
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86 "Decode audio through Core Audio through",
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87 "Eric Wing <ewing . public @ playcontrol.net>",
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88 "http://playcontrol.net"
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89 },
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90
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91 CoreAudio_init, /* init() method */
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92 CoreAudio_quit, /* quit() method */
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93 CoreAudio_open, /* open() method */
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94 CoreAudio_close, /* close() method */
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95 CoreAudio_read, /* read() method */
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96 CoreAudio_rewind, /* rewind() method */
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97 CoreAudio_seek /* seek() method */
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98 };
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99
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100
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101 static int CoreAudio_init(void)
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102 {
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103 return(1); /* always succeeds. */
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104 } /* CoreAudio_init */
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105
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106
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107 static void CoreAudio_quit(void)
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108 {
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109 /* it's a no-op. */
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110 } /* CoreAudio_quit */
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111
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112 /*
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113 http://developer.apple.com/library/ios/#documentation/MusicAudio/Reference/AudioFileConvertRef/Reference/reference.html
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114 kAudioFileAIFFType = 'AIFF',
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115 kAudioFileAIFCType = 'AIFC',
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116 kAudioFileWAVEType = 'WAVE',
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117 kAudioFileSoundDesigner2Type = 'Sd2f',
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118 kAudioFileNextType = 'NeXT',
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119 kAudioFileMP3Type = 'MPG3',
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120 kAudioFileMP2Type = 'MPG2',
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121 kAudioFileMP1Type = 'MPG1',
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122 kAudioFileAC3Type = 'ac-3',
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123 kAudioFileAAC_ADTSType = 'adts',
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124 kAudioFileMPEG4Type = 'mp4f',
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125 kAudioFileM4AType = 'm4af',
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126 kAudioFileCAFType = 'caff',
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127 kAudioFile3GPType = '3gpp',
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128 kAudioFile3GP2Type = '3gp2',
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129 kAudioFileAMRType = 'amrf'
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130 */
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131 static AudioFileTypeID CoreAudio_GetAudioTypeForExtension(const char* file_extension)
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132 {
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133 if( (__Sound_strcasecmp(file_extension, "aif") == 0)
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134 || (__Sound_strcasecmp(file_extension, "aiff") == 0)
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135 || (__Sound_strcasecmp(file_extension, "aifc") == 0)
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136 )
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137 {
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138 return kAudioFileAIFCType;
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139 }
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140 else if( (__Sound_strcasecmp(file_extension, "wav") == 0)
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141 || (__Sound_strcasecmp(file_extension, "wave") == 0)
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142 )
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143 {
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144 return kAudioFileWAVEType;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
145 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
146 else if( (__Sound_strcasecmp(file_extension, "mp3") == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
147 )
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 return kAudioFileMP3Type;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
150 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
151 else if( (__Sound_strcasecmp(file_extension, "mp4") == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
152 )
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 return kAudioFileMPEG4Type;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
155 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
156 else if( (__Sound_strcasecmp(file_extension, "m4a") == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
157 )
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 return kAudioFileM4AType;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
160 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
161 else if( (__Sound_strcasecmp(file_extension, "aac") == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
162 )
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 return kAudioFileAAC_ADTSType;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
165 }
580
33a77ceaed26 Added more file extension variations for CoreAudio.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 578
diff changeset
166 else if( (__Sound_strcasecmp(file_extension, "adts") == 0)
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
167 )
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
168 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
169 return kAudioFileAAC_ADTSType;
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 else if( (__Sound_strcasecmp(file_extension, "caf") == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
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172 || (__Sound_strcasecmp(file_extension, "caff") == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
173 )
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
174 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
175 return kAudioFileCAFType;
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 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
178 || (__Sound_strcasecmp(file_extension, "sd2") == 0)
576
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Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
179 )
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
180 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
181 return kAudioFileSoundDesigner2Type;
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 else if( (__Sound_strcasecmp(file_extension, "au") == 0)
580
33a77ceaed26 Added more file extension variations for CoreAudio.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 578
diff changeset
184 || (__Sound_strcasecmp(file_extension, "snd") == 0)
576
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185 || (__Sound_strcasecmp(file_extension, "next") == 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>
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diff changeset
188 return kAudioFileNextType;
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, "mp2") == 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>
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diff changeset
193 return kAudioFileMP2Type;
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, "mp1") == 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 {
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198 return kAudioFileMP1Type;
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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, "ac3") == 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>
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diff changeset
203 return kAudioFileAC3Type;
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, "3gpp") == 0)
580
33a77ceaed26 Added more file extension variations for CoreAudio.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 578
diff changeset
206 || (__Sound_strcasecmp(file_extension, "3gp") == 0)
576
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 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
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diff changeset
209 return kAudioFile3GPType;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
210 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
211 else if( (__Sound_strcasecmp(file_extension, "3gp2") == 0)
580
33a77ceaed26 Added more file extension variations for CoreAudio.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 578
diff changeset
212 || (__Sound_strcasecmp(file_extension, "3g2") == 0)
576
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 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
215 return kAudioFile3GP2Type;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
216 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
217 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
218 || (__Sound_strcasecmp(file_extension, "amr") == 0)
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
219 )
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
220 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
221 return kAudioFileAMRType;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
222 }
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
223 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
224 || (__Sound_strcasecmp(file_extension, "ima") == 0)
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
225 )
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
226 {
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
227 /* not sure about this one */
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
228 return kAudioFileCAFType;
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
229 }
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
230 else
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 return 0;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
233 }
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
234
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
235 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
236
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
237 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
238 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
239 static char return_string[16];
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
240 uint32_t big_endian_code = htonl(error_code);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
241 char* big_endian_str = (char*)&big_endian_code;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
242 // 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
243 if(isprint(big_endian_str[0])
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
244 && isprint(big_endian_str[1])
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
245 && isprint(big_endian_str[2])
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
246 && isprint (big_endian_str[3]))
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
247 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
248 return_string[0] = '\'';
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
249 return_string[1] = big_endian_str[0];
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
250 return_string[2] = big_endian_str[1];
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
251 return_string[3] = big_endian_str[2];
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
252 return_string[4] = big_endian_str[3];
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
253 return_string[5] = '\'';
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
254 return_string[6] = '\0';
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 else if(error_code > -200000 && error_code < 200000)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
257 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
258 // no, format it as an integer
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
259 snprintf(return_string, 16, "%d", error_code);
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 else
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 // 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
264 snprintf(return_string, 16, "0x%x", error_code);
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 return return_string;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
267 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
268
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
269
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
270
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
271 SInt64 CoreAudio_SizeCallback(void* inClientData)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
272 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
273 SDL_RWops* rw_ops = (SDL_RWops*)inClientData;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
274 SInt64 current_position = SDL_RWtell(rw_ops);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
275 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
276 SDL_RWseek(rw_ops, current_position, SEEK_SET);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
277 // fprintf(stderr, "CoreAudio_SizeCallback:%d\n", end_position);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
278
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
279 return end_position;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
280 }
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 OSStatus CoreAudio_ReadCallback(
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
283 void* inClientData,
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
284 SInt64 inPosition,
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
285 UInt32 requestCount,
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
286 void* data_buffer,
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
287 UInt32* actualCount
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 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
290 SDL_RWops* rw_ops = (SDL_RWops*)inClientData;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
291 SDL_RWseek(rw_ops, inPosition, SEEK_SET);
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292 size_t bytes_actually_read = SDL_RWread(rw_ops, data_buffer, 1, requestCount);
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293 // Not sure how to test for a read error with SDL_RWops
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294 // fprintf(stderr, "CoreAudio_ReadCallback:%d, %d\n", requestCount, bytes_actually_read);
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295
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296 *actualCount = bytes_actually_read;
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297 return noErr;
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298 }
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299
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300
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301 static int CoreAudio_open(Sound_Sample *sample, const char *ext)
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302 {
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303 CoreAudioFileContainer* core_audio_file_container;
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304 AudioFileID* audio_file_id;
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305 OSStatus error_result;
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306 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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307 AudioStreamBasicDescription actual_format;
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diff changeset
308 AudioStreamBasicDescription output_format;
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diff changeset
309 Float64 estimated_duration;
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diff changeset
310 UInt32 format_size;
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311
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diff changeset
312
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313 core_audio_file_container = (CoreAudioFileContainer*)malloc(sizeof(CoreAudioFileContainer));
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314 BAIL_IF_MACRO(core_audio_file_container == NULL, ERR_OUT_OF_MEMORY, 0);
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315
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diff changeset
316
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317 audio_file_id = (AudioFileID*)malloc(sizeof(AudioFileID));
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318 BAIL_IF_MACRO(audio_file_id == NULL, ERR_OUT_OF_MEMORY, 0);
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319
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320 error_result = AudioFileOpenWithCallbacks(
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321 internal->rw,
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322 CoreAudio_ReadCallback,
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323 NULL,
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324 CoreAudio_SizeCallback,
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325 NULL,
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diff changeset
326 CoreAudio_GetAudioTypeForExtension(ext),
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parents:
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327 audio_file_id
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diff changeset
328 );
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diff changeset
329 if (error_result != noErr)
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diff changeset
330 {
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331 AudioFileClose(*audio_file_id);
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332 free(audio_file_id);
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333 free(core_audio_file_container);
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334 SNDDBG(("Core Audio: can't grok data. reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
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335 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
8d62447b75f2 Added new Core Audio backend.
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diff changeset
336 } /* if */
8d62447b75f2 Added new Core Audio backend.
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diff changeset
337
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diff changeset
338 format_size = sizeof(actual_format);
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diff changeset
339 error_result = AudioFileGetProperty(
8d62447b75f2 Added new Core Audio backend.
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diff changeset
340 *audio_file_id,
8d62447b75f2 Added new Core Audio backend.
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diff changeset
341 kAudioFilePropertyDataFormat,
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342 &format_size,
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diff changeset
343 &actual_format
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diff changeset
344 );
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parents:
diff changeset
345 if (error_result != noErr)
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parents:
diff changeset
346 {
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diff changeset
347 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend.
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diff changeset
348 free(audio_file_id);
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diff changeset
349 free(core_audio_file_container);
577
af33b35a55c1 Minor cleanups. Ready to release.
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diff changeset
350 SNDDBG(("Core Audio: AudioFileGetProperty failed. reason: [%s]", CoreAudio_FourCCToString(error_result)));
576
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351 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
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352 } /* if */
8d62447b75f2 Added new Core Audio backend.
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diff changeset
353
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diff changeset
354 format_size = sizeof(estimated_duration);
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diff changeset
355 error_result = AudioFileGetProperty(
8d62447b75f2 Added new Core Audio backend.
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diff changeset
356 *audio_file_id,
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
357 kAudioFilePropertyEstimatedDuration,
8d62447b75f2 Added new Core Audio backend.
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diff changeset
358 &format_size,
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diff changeset
359 &estimated_duration
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diff changeset
360 );
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
361 if (error_result != noErr)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
362 {
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
363 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
364 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
365 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
366 SNDDBG(("Core Audio: AudioFileGetProperty failed. reason: [%s].\n", CoreAudio_FourCCToString(error_result)));
8d62447b75f2 Added new Core Audio backend.
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diff changeset
367 BAIL_MACRO("Core Audio: Not valid audio data.", 0);
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
368 } /* if */
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
369
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
370
8d62447b75f2 Added new Core Audio backend.
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diff changeset
371 core_audio_file_container->audioFileID = audio_file_id;
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
372
8d62447b75f2 Added new Core Audio backend.
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diff changeset
373 internal->decoder_private = core_audio_file_container;
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diff changeset
374
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diff changeset
375 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
376 sample->actual.rate = (UInt32) actual_format.mSampleRate;
af33b35a55c1 Minor cleanups. Ready to release.
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parents: 576
diff changeset
377 sample->actual.channels = (UInt8)actual_format.mChannelsPerFrame;
af33b35a55c1 Minor cleanups. Ready to release.
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parents: 576
diff changeset
378 internal->total_time = (SInt32)(estimated_duration * 1000.0 + 0.5);
576
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parents:
diff changeset
379
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
380 #if 0
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
381 /* FIXME: Both Core Audio and SDL 1.3 support float and 32-bit formats */
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
382 if(actual_format.mFormatFlags & kAudioFormatFlagIsBigEndian)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
383 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
384 if(16 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
385 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
386 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
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 sample->actual.format = AUDIO_S16MSB;
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 else
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_U16MSB;
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 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
395 else if(8 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
396 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
397 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
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 sample->actual.format = AUDIO_S8;
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 else
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
402 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
403 sample->actual.format = AUDIO_U8;
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 else // might be 0 for undefined?
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
407 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
408 // 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
409 sample->actual.format = AUDIO_S16SYS;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
410 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
411
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 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
414 else // little endian
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
415 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
416 if(16 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
417 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
418 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
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 sample->actual.format = AUDIO_S16LSB;
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 else
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_U16LSB;
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 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
427 else if(8 == actual_format.mBitsPerChannel)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
428 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
429 if(kAudioFormatFlagIsSignedInteger & actual_format.mFormatFlags)
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 sample->actual.format = AUDIO_S8;
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 else
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 sample->actual.format = AUDIO_U8;
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 else // might be 0 for undefined?
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
439 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
440 sample->actual.format = AUDIO_S16SYS;
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 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
443 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
444
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
445 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
446 #else
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
447
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
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
450 /*
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
451 * 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
452 * 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
453 * 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
454 * as the desired format.
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
455 */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
456 sample->actual.format = (sample->desired.format == 0) ?
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
457 AUDIO_S16SYS : sample->desired.format;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
458 #endif
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 SNDDBG(("CoreAudio: channels == (%d).\n", sample->actual.channels));
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
462 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
463 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
464 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
465
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
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
468 error_result = ExtAudioFileWrapAudioFileID(*audio_file_id,
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
469 false, // set to false for read-only
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
470 &core_audio_file_container->extAudioFileRef
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
471 );
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
472 if(error_result != noErr)
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 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
475 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
476 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
477 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
478 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
479 } /* if */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
480
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
481
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
482 /* 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
483 * 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
484 * optimal format on iPhone/iPod Touch hardware.
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
485 * 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
486 */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
487 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
488 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
489 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
490 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
491
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
492 if(sample->desired.format == 0)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
493 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
494 // do AUDIO_S16SYS
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
495 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
496 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
497 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
498 else
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 output_format.mFormatFlags = 0; // clear flags
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
501 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
502 // Mask against bitsize
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
503 if(0xFF & sample->desired.format)
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 output_format.mBitsPerChannel = 16; /* 16-bit */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
506 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
507 else
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
508 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
509 output_format.mBitsPerChannel = 8; /* 8-bit */
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
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
512 // Mask for signed/unsigned
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
513 if((1<<15) & sample->desired.format)
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 output_format.mFormatFlags = output_format.mFormatFlags | kAudioFormatFlagIsSignedInteger;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
516
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 else
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 // no flag set for unsigned
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 // Mask for big/little endian
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
523 if((1<<12) & sample->desired.format)
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 output_format.mFormatFlags = output_format.mFormatFlags | kAudioFormatFlagIsBigEndian;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
526 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
527 else
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 // no flag set for little endian
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 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
532
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
533 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
534 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
535
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
536
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
537 /*
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
538 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
539 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
540 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
541 // output_format.mFormatFlags = kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsSignedInteger;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
542 output_format.mFormatFlags = kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsSignedInteger;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
543 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
544 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
545 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
546 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
547 */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
548 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
549 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
550 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
551 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
552 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
553 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
554 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
555 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
556
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
557
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
558 /* Set the desired client (output) data format */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
559 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
560 if(noErr != error_result)
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 ExtAudioFileDispose(core_audio_file_container->extAudioFileRef);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
563 AudioFileClose(*audio_file_id);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
564 free(audio_file_id);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
565 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
566 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
567 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
568 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
569
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
570
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
571 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
572 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
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 /* 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
577 * info will be returned to the user.
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 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
580
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
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
583 return(1);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
584 } /* CoreAudio_open */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
585
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
586
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
587 static void CoreAudio_close(Sound_Sample *sample)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
588 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
589 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
590 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
591
578
7ff36153215a Fixed 48-byte memory leak.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 577
diff changeset
592 free(core_audio_file_container->outputFormat);
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
593 ExtAudioFileDispose(core_audio_file_container->extAudioFileRef);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
594 AudioFileClose(*core_audio_file_container->audioFileID);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
595 free(core_audio_file_container->audioFileID);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
596 free(core_audio_file_container);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
597
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
598 } /* CoreAudio_close */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
599
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
600
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
601 static Uint32 CoreAudio_read(Sound_Sample *sample)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
602 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
603 OSStatus error_result = noErr;
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
604 /* 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
605 * 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
606 * bits which turn to 0.
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
607 */
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
608 UInt32 buffer_size_in_frames = 0;
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
609 UInt32 buffer_size_in_frames_remaining = 0;
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
610 UInt32 total_frames_read = 0;
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
611 UInt32 data_buffer_size = 0;
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
612 UInt32 bytes_remaining = 0;
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
613 size_t total_bytes_read = 0;
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
614 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
615 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
616 UInt32 max_buffer_size = internal->buffer_size;
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
617
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
618 // 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
619 // 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
620
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
621 /* 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
622 /* 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
623 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
624 // 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
625
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
626
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
627 // void* temp_buffer = malloc(max_buffer_size);
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 AudioBufferList audio_buffer_list;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
630 audio_buffer_list.mNumberBuffers = 1;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
631 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
632 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
633 audio_buffer_list.mBuffers[0].mData = internal->buffer;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
634
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
635
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
636 bytes_remaining = max_buffer_size;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
637 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
638
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
639 // oops. Due to the kAudioFormatFlagIsPacked bug,
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
640 // 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
641 // 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
642 // So this while-loop might be unnecessary.
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
643 // 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
644 // 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
645 // 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
646 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
647 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
648
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
649 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
650 // 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
651
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
652 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
653
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
654 // 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
655
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
656
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
657 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
658 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
659
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
660
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
661 /* Read the data into an AudioBufferList */
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
662 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
663 if(error_result == noErr)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
664 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
665
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 /* Success */
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
668
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
669 total_frames_read += buffer_size_in_frames;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
670 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
671
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
672 // 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
673
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
674 /* 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
675 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
676 // 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
677
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
678 total_bytes_read += data_buffer_size;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
679 bytes_remaining = bytes_remaining - data_buffer_size;
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 /* 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
682 if(0 == buffer_size_in_frames)
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
683 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
684 sample->flags |= SOUND_SAMPLEFLAG_EOF;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
685 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
686
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 else
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 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
691
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
692 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
693 break;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
694
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
695 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
696 }
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 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
699 {
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
700 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
701
577
af33b35a55c1 Minor cleanups. Ready to release.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 576
diff changeset
702 /* Don't know what to do here. */
576
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
703 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
704 }
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
705 return total_bytes_read;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
706 } /* CoreAudio_read */
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
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
709 static int CoreAudio_rewind(Sound_Sample *sample)
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 OSStatus error_result = noErr;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
parents:
diff changeset
712 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
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713 CoreAudioFileContainer* core_audio_file_container = (CoreAudioFileContainer *) internal->decoder_private;
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714
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715 error_result = ExtAudioFileSeek(core_audio_file_container->extAudioFileRef, 0);
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716 if(error_result != noErr)
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717 {
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718 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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719 }
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720 return(1);
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721 } /* CoreAudio_rewind */
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722
579
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723 /* Note: I found this tech note:
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724 http://developer.apple.com/library/mac/#qa/qa2009/qa1678.html
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725 I don't know if this applies to us. So far, I haven't noticed the problem,
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726 so I haven't applied any of the techniques.
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727 */
576
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728 static int CoreAudio_seek(Sound_Sample *sample, Uint32 ms)
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729 {
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730 OSStatus error_result = noErr;
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731 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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732 CoreAudioFileContainer* core_audio_file_container = (CoreAudioFileContainer *) internal->decoder_private;
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733 SInt64 frame_offset = 0;
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734 AudioStreamBasicDescription actual_format;
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735 UInt32 format_size;
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736
579
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737
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738 /* I'm confused. The Apple documentation says this:
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739 "Seek position is specified in the sample rate and frame count of the file’s audio data format
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740 — not your application’s audio data format."
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741 My interpretation is that I want to get the "actual format of the file and compute the frame offset.
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742 But when I try that, seeking goes to the wrong place.
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743 When I use outputFormat, things seem to work correctly.
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744 I must be misinterpreting the documentation or doing something wrong.
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745 */
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746 #if 0 /* not working */
576
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747 format_size = sizeof(AudioStreamBasicDescription);
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748 error_result = AudioFileGetProperty(
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749 *core_audio_file_container->audioFileID,
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750 kAudioFilePropertyDataFormat,
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751 &format_size,
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752 &actual_format
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753 );
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754 if(error_result != noErr)
8d62447b75f2 Added new Core Audio backend.
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755 {
8d62447b75f2 Added new Core Audio backend.
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756 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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757 BAIL_MACRO("Core Audio: Could not GetProperty for kAudioFilePropertyDataFormat.", 0);
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758 } /* if */
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759
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760 // packetIndex = (pos * sampleRate) / framesPerPacket
579
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761 // frame_offset = (SInt64)((ms/1000.0 * actual_format.mSampleRate) / actual_format.mFramesPerPacket);
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762 #else /* seems to work, but I'm confused */
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763 // packetIndex = (pos * sampleRate) / framesPerPacket
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764 frame_offset = (SInt64)((ms/1000.0 * core_audio_file_container->outputFormat->mSampleRate) / core_audio_file_container->outputFormat->mFramesPerPacket);
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765 #endif
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766
576
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767 // computed against actual format and not the client format
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768 error_result = ExtAudioFileSeek(core_audio_file_container->extAudioFileRef, frame_offset);
8d62447b75f2 Added new Core Audio backend.
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769 if(error_result != noErr)
8d62447b75f2 Added new Core Audio backend.
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770 {
8d62447b75f2 Added new Core Audio backend.
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diff changeset
771 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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772 }
8d62447b75f2 Added new Core Audio backend.
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parents:
diff changeset
773
8d62447b75f2 Added new Core Audio backend.
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774 return(1);
8d62447b75f2 Added new Core Audio backend.
Eric Wing <ewing . public |-at-| gmail . com>
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775 } /* CoreAudio_seek */
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776
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777 #endif /* SOUND_SUPPORTS_COREAUDIO */
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diff changeset
778
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parents:
diff changeset
779
577
af33b35a55c1 Minor cleanups. Ready to release.
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parents: 576
diff changeset
780 /* end of coreaudio.c ... */
576
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781