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annotate src/audio/macosx/SDL_coreaudio.c @ 2049:5f6550e5184f

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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 09:15:21 +0000
parents adf732f1f016
children 72cc2226d6a3
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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
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27 #include "SDL_audio.h"
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28 #include "../SDL_audio_c.h"
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29 #include "../SDL_sysaudio.h"
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30 #include "SDL_coreaudio.h"
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31
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32 #define DEBUG_COREAUDIO 0
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33
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34 typedef struct COREAUDIO_DeviceList
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35 {
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36 AudioDeviceID id;
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37 const char *name;
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38 } COREAUDIO_DeviceList;
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39
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40 static COREAUDIO_DeviceList *inputDevices = NULL;
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41 static int inputDeviceCount = 0;
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42 static COREAUDIO_DeviceList *outputDevices = NULL;
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43 static int outputDeviceCount = 0;
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44
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45 static void
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46 free_device_list(COREAUDIO_DeviceList **devices, int *devCount)
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47 {
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48 if (*devices) {
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49 int i = *devCount;
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50 while (i--)
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51 SDL_free((void *) (*devices)[i].name);
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52 SDL_free(*devices);
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53 *devices = NULL;
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54 }
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55 *devCount = 0;
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56 }
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57
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58
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59 static void
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60 build_device_list(int iscapture, COREAUDIO_DeviceList **devices, int *devCount)
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61 {
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62 Boolean outWritable = 0;
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63 OSStatus result = noErr;
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64 UInt32 size = 0;
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65 AudioDeviceID *devs = NULL;
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66 UInt32 i = 0;
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67 UInt32 max = 0;
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68
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69 free_device_list(devices, devCount);
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70
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71 result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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72 &size, &outWritable);
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73
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74 if (result != kAudioHardwareNoError)
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75 return;
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76
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77 devs = (AudioDeviceID *) alloca(size);
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78 if (devs == NULL)
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79 return;
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80
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81 max = size / sizeof (AudioDeviceID);
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82 *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof (**devices));
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83 if (*devices == NULL)
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84 return;
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85
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86 result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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87 &size, devs);
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88 if (result != kAudioHardwareNoError)
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89 return;
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90
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91 for (i = 0; i < max; i++) {
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92 CFStringRef cfstr = NULL;
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93 char *ptr = NULL;
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94 AudioDeviceID dev = devs[i];
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95 AudioBufferList *buflist = NULL;
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96 int usable = 0;
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97 CFIndex len = 0;
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98
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99 result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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100 kAudioDevicePropertyStreamConfiguration,
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101 &size, &outWritable);
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102 if (result != noErr)
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103 continue;
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104
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105 buflist = (AudioBufferList *) SDL_malloc(size);
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106 if (buflist == NULL)
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107 continue;
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108
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109 result = AudioDeviceGetProperty(dev, 0, iscapture,
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110 kAudioDevicePropertyStreamConfiguration,
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111 &size, buflist);
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112
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113 if (result == noErr) {
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114 UInt32 j;
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115 for (j = 0; j < buflist->mNumberBuffers; j++) {
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116 if (buflist->mBuffers[j].mNumberChannels > 0) {
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117 usable = 1;
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118 break;
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119 }
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120 }
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121 }
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122
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123 SDL_free(buflist);
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124
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125 if (!usable)
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126 continue;
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127
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128 size = sizeof (CFStringRef);
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129 result = AudioDeviceGetProperty(dev, 0, iscapture,
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130 kAudioObjectPropertyName,
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131 &size, &cfstr);
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132
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133 if (result != kAudioHardwareNoError)
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134 continue;
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135
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136 len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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137 kCFStringEncodingUTF8);
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138
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139 ptr = (char *) SDL_malloc(len + 1);
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140 usable = ( (ptr != NULL) &&
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141 (CFStringGetCString(cfstr,ptr,len+1,kCFStringEncodingUTF8)) );
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142
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143 CFRelease(cfstr);
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144
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145 if (usable) {
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146 len = strlen(ptr);
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147 /* Some devices have whitespace at the end...trim it. */
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148 while ((len > 0) && (ptr[len-1] == ' ')) {
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149 len--;
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150 }
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151 usable = (len > 0);
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152 }
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153
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154 if (!usable) {
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155 SDL_free(ptr);
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156 } else {
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157 ptr[len] = '\0';
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158
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159 #if DEBUG_COREAUDIO
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160 printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
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161 ((iscapture) ? "capture" : "output"),
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162 (int) *devCount, ptr, (int) dev);
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163 #endif
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164
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165 (*devices)[*devCount].id = dev;
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166 (*devices)[*devCount].name = ptr;
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167 (*devCount)++;
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168 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
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169 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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170 }
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171
2049
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172 static inline void
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173 build_device_lists(void)
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174 {
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175 build_device_list(0, &outputDevices, &outputDeviceCount);
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176 build_device_list(1, &inputDevices, &inputDeviceCount);
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177 }
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178
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179
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180 static inline void
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181 free_device_lists(void)
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182 {
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183 free_device_list(&outputDevices, &outputDeviceCount);
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184 free_device_list(&inputDevices, &inputDeviceCount);
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185 }
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186
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187
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188 static int
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189 find_device_id(const char *devname, int iscapture, AudioDeviceID *id)
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190 {
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191 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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192 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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193 while (i--) {
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194 if (SDL_strcmp(devname, devs->name) == 0) {
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195 *id = devs->id;
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196 return 1;
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197 }
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198 devs++;
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199 }
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200
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201 return 0;
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202 }
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203
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204
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205 static int
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206 COREAUDIO_DetectDevices(int iscapture)
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207 {
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208 if (iscapture) {
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209 build_device_list(1, &inputDevices, &inputDeviceCount);
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210 return inputDeviceCount;
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211 } else {
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212 build_device_list(0, &outputDevices, &outputDeviceCount);
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213 return outputDeviceCount;
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214 }
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215
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216 return 0; /* shouldn't ever hit this. */
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217 }
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218
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219
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diff changeset
220 static const char *
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221 COREAUDIO_GetDeviceName(int index, int iscapture)
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222 {
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diff changeset
223 if ((iscapture) && (index < inputDeviceCount)) {
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224 return inputDevices[index].name;
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225 } else if ((!iscapture) && (index < outputDeviceCount)) {
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226 return outputDevices[index].name;
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227 }
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228
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229 SDL_SetError("No such device");
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230 return NULL;
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231 }
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232
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233
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234 static void
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235 COREAUDIO_Deinitialize(void)
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236 {
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237 free_device_lists();
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238 }
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239
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240
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241 /* The CoreAudio callback */
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242 static OSStatus
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243 outputCallback(void *inRefCon,
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244 AudioUnitRenderActionFlags *ioActionFlags,
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245 const AudioTimeStamp * inTimeStamp,
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246 UInt32 inBusNumber, UInt32 inNumberFrames,
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247 AudioBufferList *ioDataList)
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248 {
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249 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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250 AudioBuffer *ioData = &ioDataList->mBuffers[0];
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251 UInt32 remaining, len;
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252 void *ptr;
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253
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254 /* Is there ever more than one buffer, and what do you do with it? */
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255 if (ioDataList->mNumberBuffers != 1) {
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256 return noErr;
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257 }
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258
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259 /* Only do anything if audio is enabled and not paused */
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260 if (!this->enabled || this->paused) {
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261 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
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262 return 0;
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263 }
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264
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265 /* No SDL conversion should be needed here, ever, since we accept
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266 any input format in OpenAudio, and leave the conversion to CoreAudio.
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267 */
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268 /*
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269 assert(!this->convert.needed);
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270 assert(this->spec.channels == ioData->mNumberChannels);
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271 */
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272
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273 remaining = ioData->mDataByteSize;
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274 ptr = ioData->mData;
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275 while (remaining > 0) {
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276 if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
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277 /* Generate the data */
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278 SDL_memset(this->hidden->buffer, this->spec.silence,
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279 this->hidden->bufferSize);
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280 SDL_mutexP(this->mixer_lock);
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281 (*this->spec.callback) (this->spec.userdata, this->hidden->buffer,
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282 this->hidden->bufferSize);
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283 SDL_mutexV(this->mixer_lock);
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284 this->hidden->bufferOffset = 0;
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285 }
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286
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287 len = this->hidden->bufferSize - this->hidden->bufferOffset;
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288 if (len > remaining)
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289 len = remaining;
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290 SDL_memcpy(ptr,
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291 (char *) this->hidden->buffer + this->hidden->bufferOffset,
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292 len);
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293 ptr = (char *) ptr + len;
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294 remaining -= len;
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295 this->hidden->bufferOffset += len;
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296 }
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297
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298 return 0;
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299 }
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300
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301 static OSStatus
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302 inputCallback(void *inRefCon,
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303 AudioUnitRenderActionFlags *ioActionFlags,
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304 const AudioTimeStamp * inTimeStamp,
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305 UInt32 inBusNumber, UInt32 inNumberFrames,
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306 AudioBufferList *ioData)
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307 {
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308 //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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309 // !!! FIXME: write me!
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310 return noErr;
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311 }
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312
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313
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314 static void
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315 COREAUDIO_CloseDevice(_THIS)
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316 {
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317 if (this->hidden != NULL) {
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318 OSStatus result = noErr;
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319 AURenderCallbackStruct callback;
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320 const AudioUnitElement output_bus = 0;
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321 const AudioUnitElement input_bus = 1;
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322 const int iscapture = this->iscapture;
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323 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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324 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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325 kAudioUnitScope_Input);
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326
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327 /* stop processing the audio unit */
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328 result = AudioOutputUnitStop(this->hidden->audioUnit);
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329
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330 /* Remove the input callback */
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331 SDL_memset(&callback, '\0', sizeof (AURenderCallbackStruct));
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332 result = AudioUnitSetProperty(this->hidden->audioUnit,
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333 kAudioUnitProperty_SetRenderCallback,
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334 scope, bus, &callback, sizeof (callback));
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335
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336 CloseComponent(this->hidden->audioUnit);
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337
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338 SDL_free(this->hidden->buffer);
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339 SDL_free(this->hidden);
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340 this->hidden = NULL;
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341 }
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342 }
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343
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344
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345 #define CHECK_RESULT(msg) \
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346 if (result != noErr) { \
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347 COREAUDIO_CloseDevice(this); \
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348 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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349 return 0; \
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350 }
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351
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352 static int
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353 find_device_by_name(_THIS, const char *devname, int iscapture)
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354 {
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355 AudioDeviceID devid = 0;
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356 OSStatus result = noErr;
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357 UInt32 size = 0;
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358 UInt32 alive = 0;
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359 pid_t pid = 0;
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360
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361 if (devname == NULL) {
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362 size = sizeof (AudioDeviceID);
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363 const AudioHardwarePropertyID propid =
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364 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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diff changeset
365 kAudioHardwarePropertyDefaultOutputDevice);
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366
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diff changeset
367 result = AudioHardwareGetProperty(propid, &size, &devid);
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diff changeset
368 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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369 } else {
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370 if (!find_device_id(devname, iscapture, &devid)) {
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371 SDL_SetError("CoreAudio: No such audio device.");
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372 return 0;
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373 }
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374 }
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375
2049
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376 size = sizeof (alive);
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377 result = AudioDeviceGetProperty(devid, 0, iscapture,
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378 kAudioDevicePropertyDeviceIsAlive,
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379 &size, &alive);
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380 CHECK_RESULT("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
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381
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382 if (!alive) {
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383 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
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384 return 0;
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385 }
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diff changeset
386
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387 size = sizeof (pid);
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388 result = AudioDeviceGetProperty(devid, 0, iscapture,
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diff changeset
389 kAudioDevicePropertyHogMode, &size, &pid);
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diff changeset
390
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diff changeset
391 /* some devices don't support this property, so errors are fine here. */
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392 if ((result == noErr) && (pid != -1)) {
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393 SDL_SetError("CoreAudio: requested device is being hogged.");
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394 return 0;
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395 }
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diff changeset
396
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397 this->hidden->deviceID = devid;
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398 return 1;
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399 }
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diff changeset
400
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diff changeset
401
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diff changeset
402 static int
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diff changeset
403 prepare_audiounit(_THIS, const char *devname, int iscapture,
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diff changeset
404 const AudioStreamBasicDescription *strdesc)
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diff changeset
405 {
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diff changeset
406 OSStatus result = noErr;
2049
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407 AURenderCallbackStruct callback;
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diff changeset
408 ComponentDescription desc;
2049
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diff changeset
409 Component comp = NULL;
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diff changeset
410 int use_system_device = 0;
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diff changeset
411 UInt32 enableIO = 0;
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diff changeset
412 const AudioUnitElement output_bus = 0;
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diff changeset
413 const AudioUnitElement input_bus = 1;
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diff changeset
414 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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415 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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diff changeset
416 kAudioUnitScope_Input);
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417
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diff changeset
418 if (!find_device_by_name(this, devname, iscapture)) {
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diff changeset
419 SDL_SetError("Couldn't find requested CoreAudio device");
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420 return 0;
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421 }
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diff changeset
422
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diff changeset
423 SDL_memset(&desc, '\0', sizeof(ComponentDescription));
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diff changeset
424 desc.componentType = kAudioUnitType_Output;
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425 desc.componentSubType = kAudioUnitSubType_HALOutput;
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diff changeset
426 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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diff changeset
427
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diff changeset
428 comp = FindNextComponent(NULL, &desc);
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diff changeset
429 if (comp == NULL) {
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diff changeset
430 SDL_SetError("Couldn't find requested CoreAudio component");
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diff changeset
431 return 0;
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diff changeset
432 }
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diff changeset
433
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diff changeset
434 /* Open & initialize the audio unit */
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diff changeset
435 result = OpenAComponent(comp, &this->hidden->audioUnit);
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diff changeset
436 CHECK_RESULT("OpenAComponent");
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diff changeset
437
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diff changeset
438 // !!! FIXME: this is wrong?
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diff changeset
439 enableIO = ((iscapture) ? 1 : 0);
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diff changeset
440 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
441 kAudioOutputUnitProperty_EnableIO,
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diff changeset
442 kAudioUnitScope_Input, input_bus,
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diff changeset
443 &enableIO, sizeof (enableIO));
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diff changeset
444 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO input)");
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diff changeset
445
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diff changeset
446 // !!! FIXME: this is wrong?
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diff changeset
447 enableIO = ((iscapture) ? 0 : 1);
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diff changeset
448 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
449 kAudioOutputUnitProperty_EnableIO,
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diff changeset
450 kAudioUnitScope_Output, output_bus,
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diff changeset
451 &enableIO, sizeof (enableIO));
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diff changeset
452 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO output)");
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diff changeset
453
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diff changeset
454 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
455 kAudioOutputUnitProperty_CurrentDevice,
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diff changeset
456 kAudioUnitScope_Global, 0,
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diff changeset
457 &this->hidden->deviceID,
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diff changeset
458 sizeof (AudioDeviceID));
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diff changeset
459 CHECK_RESULT("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
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diff changeset
460
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diff changeset
461 /* Set the data format of the audio unit. */
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diff changeset
462 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
463 kAudioUnitProperty_StreamFormat,
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diff changeset
464 scope, bus, strdesc, sizeof (*strdesc));
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diff changeset
465 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
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diff changeset
466
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diff changeset
467 /* Set the audio callback */
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diff changeset
468 SDL_memset(&callback, '\0', sizeof (AURenderCallbackStruct));
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diff changeset
469 callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
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diff changeset
470 callback.inputProcRefCon = this;
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diff changeset
471 result = AudioUnitSetProperty(this->hidden->audioUnit,
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diff changeset
472 kAudioUnitProperty_SetRenderCallback,
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Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
473 scope, bus, &callback, sizeof (callback));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
474 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
475
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
476 /* 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
477 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
478
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
479 /* 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
480 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
481 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
482
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
483 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
484 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
485
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
486 /* 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
487 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
488 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
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 /* 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
491 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
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
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
494
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
495 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
496 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
497 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
498 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
499 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
500 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
501
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
502 /* 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
503 this->hidden = (struct SDL_PrivateAudioData *)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
504 SDL_malloc((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
505 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
506 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
507 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
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 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
510
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
511 /* 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
512 SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
513 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
514 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
515 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
516 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
517 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
518
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
519 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
520 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
521 /* 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
522 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
523 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
524 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
525 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
526 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
527 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
528 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
529 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
530 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
531 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
532 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
533 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
534 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
535 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
536 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
537
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
538 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
539 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
540 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
541 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
542 break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
543 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
544 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
545
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
546 if (!valid_datatype) { /* shouldn't happen, but just in case... */
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
547 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
548 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
549 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
550
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
551 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
552 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
553 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
554 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
555
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
556 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
557 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
558 }
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
559
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
560 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
561 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
562
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 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
564 COREAUDIO_Init(SDL_AudioDriverImpl *impl)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
565 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
566 /* 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
567 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
568 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
569 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
570 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
571 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
572 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
573
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
574 build_device_lists(); /* do an initial check for devices... */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
575
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
576 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
577 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
578
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
579 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
580 "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
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
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
583 /* vi: set ts=4 sw=4 expandtab: */