Mercurial > sdl-ios-xcode

annotate src/audio/macosx/SDL_coreaudio.c @ 2938:2929ed239d2a

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Adjusted default choice of audio driver. If a driver can definitely see available devices, it is chosen. Otherwise, we'll take the first driver that initializes but saw no devices...this might be because it can't enumerate them, or there really aren't any available. This prevents the dsp driver from hogging control when there are no /dev/dsp* nodes (for example, on a Linux box with ALSA and no OSS emulation).
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 01 Jan 2009 07:54:58 +0000
parents 99210400e8b9
children af4a5af3cd2b
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include <CoreAudio/CoreAudio.h>
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25 #include <AudioUnit/AudioUnit.h>
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26 #ifdef AVAILABLE_MAC_OS_X_VERSION_10_5_AND_LATER
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27 #include <AudioUnit/AUNTComponent.h>
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28 #endif
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29
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30 #include "SDL_audio.h"
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31 #include "../SDL_audio_c.h"
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32 #include "../SDL_sysaudio.h"
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33 #include "SDL_coreaudio.h"
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34
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35 #define DEBUG_COREAUDIO 0
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36
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37 typedef struct COREAUDIO_DeviceList
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38 {
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39 AudioDeviceID id;
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40 const char *name;
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41 } COREAUDIO_DeviceList;
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42
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43 static COREAUDIO_DeviceList *inputDevices = NULL;
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44 static int inputDeviceCount = 0;
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45 static COREAUDIO_DeviceList *outputDevices = NULL;
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46 static int outputDeviceCount = 0;
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47
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48 static void
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49 free_device_list(COREAUDIO_DeviceList ** devices, int *devCount)
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50 {
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51 if (*devices) {
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52 int i = *devCount;
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53 while (i--)
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54 SDL_free((void *) (*devices)[i].name);
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55 SDL_free(*devices);
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56 *devices = NULL;
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57 }
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58 *devCount = 0;
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59 }
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61
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62 static void
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63 build_device_list(int iscapture, COREAUDIO_DeviceList ** devices,
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64 int *devCount)
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65 {
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66 Boolean outWritable = 0;
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67 OSStatus result = noErr;
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68 UInt32 size = 0;
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69 AudioDeviceID *devs = NULL;
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70 UInt32 i = 0;
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71 UInt32 max = 0;
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72
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73 free_device_list(devices, devCount);
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74
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75 result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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76 &size, &outWritable);
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77
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78 if (result != kAudioHardwareNoError)
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79 return;
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80
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81 devs = (AudioDeviceID *) alloca(size);
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82 if (devs == NULL)
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83 return;
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84
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85 max = size / sizeof(AudioDeviceID);
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86 *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof(**devices));
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87 if (*devices == NULL)
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88 return;
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89
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90 result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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91 &size, devs);
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92 if (result != kAudioHardwareNoError)
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93 return;
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94
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95 for (i = 0; i < max; i++) {
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96 CFStringRef cfstr = NULL;
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97 char *ptr = NULL;
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98 AudioDeviceID dev = devs[i];
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99 AudioBufferList *buflist = NULL;
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100 int usable = 0;
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101 CFIndex len = 0;
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102
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103 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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104 kAudioDevicePropertyStreamConfiguration,
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105 &size, &outWritable);
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106 if (result != noErr)
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107 continue;
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108
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109 buflist = (AudioBufferList *) SDL_malloc(size);
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110 if (buflist == NULL)
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111 continue;
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112
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113 result = AudioDeviceGetProperty(dev, 0, iscapture,
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114 kAudioDevicePropertyStreamConfiguration,
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115 &size, buflist);
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116
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117 if (result == noErr) {
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118 UInt32 j;
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119 for (j = 0; j < buflist->mNumberBuffers; j++) {
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120 if (buflist->mBuffers[j].mNumberChannels > 0) {
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121 usable = 1;
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122 break;
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123 }
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124 }
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125 }
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126
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127 SDL_free(buflist);
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128
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129 if (!usable)
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130 continue;
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131
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132 size = sizeof(CFStringRef);
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133 result = AudioDeviceGetProperty(dev, 0, iscapture,
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134 kAudioDevicePropertyDeviceNameCFString,
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135 &size, &cfstr);
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136
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137 if (result != kAudioHardwareNoError)
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138 continue;
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139
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140 len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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141 kCFStringEncodingUTF8);
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142
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143 ptr = (char *) SDL_malloc(len + 1);
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144 usable = ((ptr != NULL) &&
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145 (CFStringGetCString
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146 (cfstr, ptr, len + 1, kCFStringEncodingUTF8)));
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147
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148 CFRelease(cfstr);
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149
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150 if (usable) {
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151 len = strlen(ptr);
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152 /* Some devices have whitespace at the end...trim it. */
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153 while ((len > 0) && (ptr[len - 1] == ' ')) {
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154 len--;
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155 }
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156 usable = (len > 0);
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157 }
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158
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159 if (!usable) {
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160 SDL_free(ptr);
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161 } else {
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162 ptr[len] = '\0';
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163
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164 #if DEBUG_COREAUDIO
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165 printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
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166 ((iscapture) ? "capture" : "output"),
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167 (int) *devCount, ptr, (int) dev);
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168 #endif
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169
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170 (*devices)[*devCount].id = dev;
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171 (*devices)[*devCount].name = ptr;
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172 (*devCount)++;
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173 }
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174 }
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175 }
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176
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177 static inline void
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178 build_device_lists(void)
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179 {
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180 build_device_list(0, &outputDevices, &outputDeviceCount);
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181 build_device_list(1, &inputDevices, &inputDeviceCount);
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182 }
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183
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184
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185 static inline void
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186 free_device_lists(void)
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187 {
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188 free_device_list(&outputDevices, &outputDeviceCount);
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189 free_device_list(&inputDevices, &inputDeviceCount);
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190 }
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191
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192
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193 static int
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194 find_device_id(const char *devname, int iscapture, AudioDeviceID * id)
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195 {
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196 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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197 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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198 while (i--) {
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199 if (SDL_strcmp(devname, devs->name) == 0) {
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200 *id = devs->id;
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201 return 1;
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202 }
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203 devs++;
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204 }
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205
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206 return 0;
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207 }
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208
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209
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210 static int
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211 COREAUDIO_DetectDevices(int iscapture)
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212 {
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213 if (iscapture) {
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214 build_device_list(1, &inputDevices, &inputDeviceCount);
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215 return inputDeviceCount;
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216 } else {
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217 build_device_list(0, &outputDevices, &outputDeviceCount);
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218 return outputDeviceCount;
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219 }
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220
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221 return 0; /* shouldn't ever hit this. */
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222 }
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223
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224
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225 static const char *
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226 COREAUDIO_GetDeviceName(int index, int iscapture)
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227 {
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228 if ((iscapture) && (index < inputDeviceCount)) {
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229 return inputDevices[index].name;
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230 } else if ((!iscapture) && (index < outputDeviceCount)) {
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231 return outputDevices[index].name;
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232 }
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233
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234 SDL_SetError("No such device");
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235 return NULL;
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236 }
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237
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238
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239 static void
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240 COREAUDIO_Deinitialize(void)
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241 {
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242 free_device_lists();
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243 }
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244
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245
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246 /* The CoreAudio callback */
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247 static OSStatus
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248 outputCallback(void *inRefCon,
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249 AudioUnitRenderActionFlags * ioActionFlags,
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250 const AudioTimeStamp * inTimeStamp,
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251 UInt32 inBusNumber, UInt32 inNumberFrames,
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252 AudioBufferList * ioDataList)
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253 {
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254 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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255 AudioBuffer *ioData = &ioDataList->mBuffers[0];
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256 UInt32 remaining, len;
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257 void *ptr;
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258
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259 /* Is there ever more than one buffer, and what do you do with it? */
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260 if (ioDataList->mNumberBuffers != 1) {
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261 return noErr;
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262 }
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263
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264 /* Only do anything if audio is enabled and not paused */
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265 if (!this->enabled || this->paused) {
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266 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
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267 return 0;
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268 }
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269
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270 /* No SDL conversion should be needed here, ever, since we accept
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271 any input format in OpenAudio, and leave the conversion to CoreAudio.
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272 */
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273 /*
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274 assert(!this->convert.needed);
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275 assert(this->spec.channels == ioData->mNumberChannels);
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276 */
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277
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278 remaining = ioData->mDataByteSize;
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279 ptr = ioData->mData;
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280 while (remaining > 0) {
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281 if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
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282 /* Generate the data */
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283 SDL_memset(this->hidden->buffer, this->spec.silence,
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284 this->hidden->bufferSize);
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285 SDL_mutexP(this->mixer_lock);
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286 (*this->spec.callback) (this->spec.userdata, this->hidden->buffer,
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287 this->hidden->bufferSize);
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288 SDL_mutexV(this->mixer_lock);
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289 this->hidden->bufferOffset = 0;
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290 }
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291
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292 len = this->hidden->bufferSize - this->hidden->bufferOffset;
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293 if (len > remaining)
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294 len = remaining;
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295 SDL_memcpy(ptr,
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296 (char *) this->hidden->buffer + this->hidden->bufferOffset,
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297 len);
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298 ptr = (char *) ptr + len;
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299 remaining -= len;
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300 this->hidden->bufferOffset += len;
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301 }
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302
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303 return 0;
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304 }
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305
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306 static OSStatus
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307 inputCallback(void *inRefCon,
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308 AudioUnitRenderActionFlags * ioActionFlags,
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309 const AudioTimeStamp * inTimeStamp,
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310 UInt32 inBusNumber, UInt32 inNumberFrames,
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311 AudioBufferList * ioData)
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312 {
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313 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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314 // !!! FIXME: write me!
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315 return noErr;
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316 }
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317
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318
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319 static void
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320 COREAUDIO_CloseDevice(_THIS)
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321 {
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322 if (this->hidden != NULL) {
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323 if (this->hidden->audioUnitOpened) {
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324 OSStatus result = noErr;
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325 AURenderCallbackStruct callback;
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326 const AudioUnitElement output_bus = 0;
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327 const AudioUnitElement input_bus = 1;
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328 const int iscapture = this->iscapture;
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329 const AudioUnitElement bus =
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330 ((iscapture) ? input_bus : output_bus);
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331 const AudioUnitScope scope =
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332 ((iscapture) ? kAudioUnitScope_Output :
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333 kAudioUnitScope_Input);
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334
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335 /* stop processing the audio unit */
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336 result = AudioOutputUnitStop(this->hidden->audioUnit);
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337
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338 /* Remove the input callback */
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339 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
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340 result = AudioUnitSetProperty(this->hidden->audioUnit,
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341 kAudioUnitProperty_SetRenderCallback,
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342 scope, bus, &callback,
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343 sizeof(callback));
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344
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345 CloseComponent(this->hidden->audioUnit);
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346 this->hidden->audioUnitOpened = 0;
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347 }
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348 SDL_free(this->hidden->buffer);
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349 SDL_free(this->hidden);
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350 this->hidden = NULL;
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351 }
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352 }
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353
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354
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355 #define CHECK_RESULT(msg) \
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356 if (result != noErr) { \
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357 COREAUDIO_CloseDevice(this); \
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358 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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359 return 0; \
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360 }
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361
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362 static int
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363 find_device_by_name(_THIS, const char *devname, int iscapture)
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364 {
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365 AudioDeviceID devid = 0;
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366 OSStatus result = noErr;
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367 UInt32 size = 0;
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368 UInt32 alive = 0;
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369 pid_t pid = 0;
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370
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371 if (devname == NULL) {
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372 size = sizeof(AudioDeviceID);
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373 const AudioHardwarePropertyID propid =
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374 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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375 kAudioHardwarePropertyDefaultOutputDevice);
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376
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377 result = AudioHardwareGetProperty(propid, &size, &devid);
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378 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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379 } else {
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380 if (!find_device_id(devname, iscapture, &devid)) {
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381 SDL_SetError("CoreAudio: No such audio device.");
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382 return 0;
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383 }
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384 }
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385
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386 size = sizeof(alive);
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387 result = AudioDeviceGetProperty(devid, 0, iscapture,
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388 kAudioDevicePropertyDeviceIsAlive,
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389 &size, &alive);
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390 CHECK_RESULT
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391 ("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
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392
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393 if (!alive) {
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394 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
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395 return 0;
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396 }
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397
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398 size = sizeof(pid);
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399 result = AudioDeviceGetProperty(devid, 0, iscapture,
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400 kAudioDevicePropertyHogMode, &size, &pid);
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401
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402 /* some devices don't support this property, so errors are fine here. */
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403 if ((result == noErr) && (pid != -1)) {
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404 SDL_SetError("CoreAudio: requested device is being hogged.");
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405 return 0;
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406 }
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407
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diff changeset
408 this->hidden->deviceID = devid;
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409 return 1;
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410 }
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diff changeset
411
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412
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413 static int
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414 prepare_audiounit(_THIS, const char *devname, int iscapture,
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415 const AudioStreamBasicDescription * strdesc)
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416 {
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417 OSStatus result = noErr;
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418 AURenderCallbackStruct callback;
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419 ComponentDescription desc;
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420 Component comp = NULL;
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421 UInt32 enableIO = 0;
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422 const AudioUnitElement output_bus = 0;
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423 const AudioUnitElement input_bus = 1;
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424 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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425 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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426 kAudioUnitScope_Input);
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427
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428 if (!find_device_by_name(this, devname, iscapture)) {
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429 SDL_SetError("Couldn't find requested CoreAudio device");
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430 return 0;
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431 }
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432
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433 SDL_memset(&desc, '\0', sizeof(ComponentDescription));
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434 desc.componentType = kAudioUnitType_Output;
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435 desc.componentSubType = kAudioUnitSubType_HALOutput;
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436 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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437
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438 comp = FindNextComponent(NULL, &desc);
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439 if (comp == NULL) {
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440 SDL_SetError("Couldn't find requested CoreAudio component");
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441 return 0;
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442 }
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443
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444 /* Open & initialize the audio unit */
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445 result = OpenAComponent(comp, &this->hidden->audioUnit);
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446 CHECK_RESULT("OpenAComponent");
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447
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448 this->hidden->audioUnitOpened = 1;
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449
2049
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450 // !!! FIXME: this is wrong?
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451 enableIO = ((iscapture) ? 1 : 0);
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452 result = AudioUnitSetProperty(this->hidden->audioUnit,
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453 kAudioOutputUnitProperty_EnableIO,
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454 kAudioUnitScope_Input, input_bus,
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455 &enableIO, sizeof(enableIO));
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456 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO input)");
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457
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458 // !!! FIXME: this is wrong?
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459 enableIO = ((iscapture) ? 0 : 1);
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460 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
461 kAudioOutputUnitProperty_EnableIO,
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diff changeset
462 kAudioUnitScope_Output, output_bus,
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463 &enableIO, sizeof(enableIO));
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464 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO output)");
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465
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diff changeset
466 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
467 kAudioOutputUnitProperty_CurrentDevice,
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diff changeset
468 kAudioUnitScope_Global, 0,
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diff changeset
469 &this->hidden->deviceID,
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470 sizeof(AudioDeviceID));
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471 CHECK_RESULT
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472 ("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
2049
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473
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diff changeset
474 /* Set the data format of the audio unit. */
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475 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
476 kAudioUnitProperty_StreamFormat,
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diff changeset
477 scope, bus, strdesc, sizeof(*strdesc));
2049
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diff changeset
478 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
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479
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diff changeset
480 /* Set the audio callback */
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diff changeset
481 SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
2049
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diff changeset
482 callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
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diff changeset
483 callback.inputProcRefCon = this;
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diff changeset
484 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
485 kAudioUnitProperty_SetRenderCallback,
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diff changeset
486 scope, bus, &callback, sizeof(callback));
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diff changeset
487 CHECK_RESULT
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diff changeset
488 ("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
489
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
490 /* Calculate the final parameters for this audio specification */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
491 SDL_CalculateAudioSpec(&this->spec);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
492
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
493 /* Allocate a sample buffer */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
494 this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
495 this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
496
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
497 result = AudioUnitInitialize(this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
498 CHECK_RESULT("AudioUnitInitialize");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
499
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
500 /* Finally, start processing of the audio unit */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
501 result = AudioOutputUnitStart(this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
502 CHECK_RESULT("AudioOutputUnitStart");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
503
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
504 /* We're running! */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
505 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
506 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
507
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
508
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
509 static int
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
510 COREAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
511 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
512 AudioStreamBasicDescription strdesc;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
513 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
514 int valid_datatype = 0;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
515
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
516 /* Initialize all variables that we clean on shutdown */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
517 this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
518 SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
519 if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
520 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
521 return (0);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
522 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
523 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
524
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
525 /* Setup a AudioStreamBasicDescription with the requested format */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
526 SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
527 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
528 strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
529 strdesc.mChannelsPerFrame = this->spec.channels;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
530 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
531 strdesc.mFramesPerPacket = 1;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
532
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
533 while ((!valid_datatype) && (test_format)) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
534 this->spec.format = test_format;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
535 /* Just a list of valid SDL formats, so people don't pass junk here. */
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
536 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
537 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
538 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
539 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
540 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
541 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
542 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
543 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
544 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
545 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
546 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
547 valid_datatype = 1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
548 strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
549 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
550 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
551
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
552 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
553 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
554 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
555 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
556 break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
557 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
558 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
559
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
560 if (!valid_datatype) { /* shouldn't happen, but just in case... */
2055
72cc2226d6a3 Fix potential memory leaks if CoreAudio initialization fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 2049
diff changeset
561 COREAUDIO_CloseDevice(this);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
562 SDL_SetError("Unsupported audio format");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
563 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
564 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
565
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
566 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
567 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
568 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
569 strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
570
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
571 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
2057
c2fed8bb6700 Oh for crying out loud...
Ryan C. Gordon <icculus@icculus.org>
parents: 2055
diff changeset
572 COREAUDIO_CloseDevice(this);
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
573 return 0; /* prepare_audiounit() will call SDL_SetError()... */
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
574 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
575
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
576 return 1; /* good to go. */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
577 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
578
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
579 static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
580 COREAUDIO_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
581 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
582 /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
583 impl->DetectDevices = COREAUDIO_DetectDevices;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
584 impl->GetDeviceName = COREAUDIO_GetDeviceName;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
585 impl->OpenDevice = COREAUDIO_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
586 impl->CloseDevice = COREAUDIO_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
587 impl->Deinitialize = COREAUDIO_Deinitialize;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
588 impl->ProvidesOwnCallbackThread = 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
589
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
590 build_device_lists(); /* do an initial check for devices... */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
591
2938
2929ed239d2a Adjusted default choice of audio driver.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
diff changeset
592 return (outputDeviceCount > 0) ? 2 : 1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
593 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
594
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
595 AudioBootStrap COREAUDIO_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
596 "coreaudio", "Mac OS X CoreAudio", COREAUDIO_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
597 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
598
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
599 /* vi: set ts=4 sw=4 expandtab: */