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annotate src/audio/macosx/SDL_coreaudio.c @ 3788:7006b176ef4f SDL-ryan-multiple-audio-device

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More work on the 1.3 CoreAudio code.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 03 Oct 2006 18:32:34 +0000
parents 8d74a4721ca9
children 8f8209f8da6d
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 1
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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 }
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169 }
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170 }
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171
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172 static int
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173 find_device_id(const char *devname, int iscapture, AudioDeviceID *id)
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174 {
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175 int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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176 COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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177 while (i--) {
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178 if (SDL_strcmp(devname, devs->name) == 0) {
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179 *id = devs->id;
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180 return 1;
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181 }
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182 devs++;
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183 }
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184
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185 return 0;
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186 }
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187
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188
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189 /* Audio driver functions */
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190
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diff changeset
191 static int COREAUDIO_OpenAudio(_THIS, const char *devname, int iscapture);
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192 static void COREAUDIO_WaitAudio(_THIS);
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193 static void COREAUDIO_PlayAudio(_THIS);
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194 static Uint8 *COREAUDIO_GetAudioBuf(_THIS);
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195 static void COREAUDIO_CloseAudio(_THIS);
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196 static void COREAUDIO_Deinitialize(void);
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197
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198 /* Audio driver bootstrap functions */
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199
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200 static int
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201 COREAUDIO_Available(void)
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202 {
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203 return (1);
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204 }
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205
3784
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diff changeset
206 static int
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207 COREAUDIO_Init(SDL_AudioDriverImpl *impl)
935
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208 {
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209 /* !!! FIXME: should these _really_ be static? */
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210 build_device_list(0, &outputDevices, &outputDeviceCount);
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diff changeset
211 build_device_list(1, &inputDevices, &inputDeviceCount);
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diff changeset
212
3784
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diff changeset
213 /* Set the function pointers */
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diff changeset
214 impl->OpenAudio = COREAUDIO_OpenAudio;
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diff changeset
215 impl->WaitAudio = COREAUDIO_WaitAudio;
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diff changeset
216 impl->PlayAudio = COREAUDIO_PlayAudio;
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diff changeset
217 impl->GetAudioBuf = COREAUDIO_GetAudioBuf;
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diff changeset
218 impl->CloseAudio = COREAUDIO_CloseAudio;
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diff changeset
219 impl->Deinitialize = COREAUDIO_Deinitialize;
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diff changeset
220
3784
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diff changeset
221 return 1;
935
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diff changeset
222 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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diff changeset
223
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
224 AudioBootStrap COREAUDIO_bootstrap = {
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parents:
diff changeset
225 "coreaudio", "Mac OS X CoreAudio",
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diff changeset
226 COREAUDIO_Available, COREAUDIO_Init
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diff changeset
227 };
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diff changeset
228
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229
8d74a4721ca9 Added deinitialize hook.
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diff changeset
230 static void
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diff changeset
231 COREAUDIO_Deinitialize(void)
8d74a4721ca9 Added deinitialize hook.
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diff changeset
232 {
3788
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diff changeset
233 free_device_list(&outputDevices, &outputDeviceCount);
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diff changeset
234 free_device_list(&inputDevices, &inputDeviceCount);
3787
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diff changeset
235 }
8d74a4721ca9 Added deinitialize hook.
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diff changeset
236
8d74a4721ca9 Added deinitialize hook.
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diff changeset
237
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238 /* The CoreAudio callback */
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diff changeset
239 static OSStatus
3785
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diff changeset
240 outputCallback(void *inRefCon,
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diff changeset
241 AudioUnitRenderActionFlags *ioActionFlags,
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diff changeset
242 const AudioTimeStamp * inTimeStamp,
3785
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diff changeset
243 UInt32 inBusNumber, UInt32 inNumberFrames,
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diff changeset
244 AudioBufferList *ioDataList)
935
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diff changeset
245 {
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diff changeset
246 SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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diff changeset
247 AudioBuffer *ioData = &ioDataList->mBuffers[0];
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diff changeset
248 UInt32 remaining, len;
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diff changeset
249 void *ptr;
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diff changeset
250
3786
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diff changeset
251 /*
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252 * !!! FIXME: I'm not sure if you can ever have more than one
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diff changeset
253 * buffer, or what this signifies, or what to do with it...
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diff changeset
254 */
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diff changeset
255 if (ioDataList->mNumberBuffers != 1) {
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diff changeset
256 return noErr;
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diff changeset
257 }
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diff changeset
258
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diff changeset
259 /* Only do anything if audio is enabled and not paused */
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diff changeset
260 if (!this->enabled || this->paused) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1312
diff changeset
261 SDL_memset(ioData->mData, this->spec.silence, ioData->mDataByteSize);
935
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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 /* Dummy functions -- we don't use thread-based audio */
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315 void
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316 COREAUDIO_WaitAudio(_THIS)
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317 {
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318 return;
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319 }
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320
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321 void
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322 COREAUDIO_PlayAudio(_THIS)
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323 {
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324 return;
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325 }
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326
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327 Uint8 *
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328 COREAUDIO_GetAudioBuf(_THIS)
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329 {
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330 return (NULL);
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331 }
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332
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333 void
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334 COREAUDIO_CloseAudio(_THIS)
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335 {
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336 if (this->hidden != NULL) {
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337 OSStatus result = noErr;
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338 AURenderCallbackStruct callback;
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339 const AudioUnitElement output_bus = 0;
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340 const AudioUnitElement input_bus = 1;
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341 const int iscapture = this->hidden->isCapture;
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342 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
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343 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
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344 kAudioUnitScope_Input);
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345
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346 /* stop processing the audio unit */
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347 result = AudioOutputUnitStop(this->hidden->audioUnit);
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348
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349 /* Remove the input callback */
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350 memset(&callback, '\0', sizeof (AURenderCallbackStruct));
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351 result = AudioUnitSetProperty(this->hidden->audioUnit,
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352 kAudioUnitProperty_SetRenderCallback,
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353 scope, bus, &callback, sizeof (callback));
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354
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355 CloseComponent(this->hidden->audioUnit);
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356
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357 SDL_free(this->hidden->buffer);
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358 SDL_free(this->hidden);
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359 this->hidden = NULL;
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360 }
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361 }
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362
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363
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364 #define CHECK_RESULT(msg) \
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365 if (result != noErr) { \
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366 COREAUDIO_CloseAudio(this); \
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367 SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
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368 return 0; \
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369 }
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370
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371 static int
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372 find_device_by_name(_THIS, const char *devname, int iscapture)
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373 {
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374 AudioDeviceID devid = 0;
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375 OSStatus result = noErr;
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376 UInt32 size = 0;
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377 UInt32 alive = 0;
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378 pid_t pid = 0;
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379
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380 if (devname == NULL) {
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381 size = sizeof (AudioDeviceID);
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382 const AudioHardwarePropertyID propid =
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383 ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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384 kAudioHardwarePropertyDefaultOutputDevice);
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385
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386 result = AudioHardwareGetProperty(propid, &size, &devid);
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387 CHECK_RESULT("AudioHardwareGetProperty (default device)");
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388 } else {
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389 if (!find_device_id(devname, iscapture, &devid)) {
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390 SDL_SetError("CoreAudio: No such audio device.");
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parents: 3784
diff changeset
391 return 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
392 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
393 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
394
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
395 size = sizeof (alive);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
396 result = AudioDeviceGetProperty(devid, 0, iscapture,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
397 kAudioDevicePropertyDeviceIsAlive,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
398 &size, &alive);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
399 CHECK_RESULT("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
400
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
401 if (!alive) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
402 SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
403 return 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
404 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
405
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
406 size = sizeof (pid);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
407 result = AudioDeviceGetProperty(devid, 0, iscapture,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
408 kAudioDevicePropertyHogMode, &size, &pid);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
409
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
410 /* some devices don't support this property, so errors are fine here. */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
411 if ((result == noErr) && (pid != -1)) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
412 SDL_SetError("CoreAudio: requested device is being hogged.");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
413 return 0;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
414 }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
415
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
416 this->hidden->deviceID = devid;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
417 return 1;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
418 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
419
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
420
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
421 static int
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
422 prepare_audiounit(_THIS, const char *devname, int iscapture,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
423 const AudioStreamBasicDescription *strdesc)
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
424 {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
425 OSStatus result = noErr;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
426 AURenderCallbackStruct callback;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
427 ComponentDescription desc;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
428 Component comp = NULL;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
429 int use_system_device = 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
430 UInt32 enableIO = 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
431 const AudioUnitElement output_bus = 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
432 const AudioUnitElement input_bus = 1;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
433 const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
434 const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
435 kAudioUnitScope_Input);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
436
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
437 if (!find_device_by_name(this, devname, iscapture)) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
438 SDL_SetError("Couldn't find requested CoreAudio device");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
439 return 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
440 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
441
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
442 memset(&desc, '\0', sizeof(ComponentDescription));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
443 desc.componentType = kAudioUnitType_Output;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
444 desc.componentSubType = kAudioUnitSubType_HALOutput;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
445 desc.componentManufacturer = kAudioUnitManufacturer_Apple;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
446
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
447 comp = FindNextComponent(NULL, &desc);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
448 if (comp == NULL) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
449 SDL_SetError("Couldn't find requested CoreAudio component");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
450 return 0;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
451 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
452
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
453 /* Open & initialize the audio unit */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
454 result = OpenAComponent(comp, &this->hidden->audioUnit);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
455 CHECK_RESULT("OpenAComponent");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
456
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
457 // !!! FIXME: this is wrong?
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
458 enableIO = ((iscapture) ? 1 : 0);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
459 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
460 kAudioOutputUnitProperty_EnableIO,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
461 kAudioUnitScope_Input, input_bus,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
462 &enableIO, sizeof (enableIO));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
463 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO input)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
464
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
465 // !!! FIXME: this is wrong?
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
466 enableIO = ((iscapture) ? 0 : 1);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
467 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
468 kAudioOutputUnitProperty_EnableIO,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
469 kAudioUnitScope_Output, output_bus,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
470 &enableIO, sizeof (enableIO));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
471 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_EnableIO output)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
472
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
473 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
474 kAudioOutputUnitProperty_CurrentDevice,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
475 kAudioUnitScope_Global, 0,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
476 &this->hidden->deviceID,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
477 sizeof (AudioDeviceID));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
478 CHECK_RESULT("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
479
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
480 /* Set the data format of the audio unit. */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
481 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
482 kAudioUnitProperty_StreamFormat,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
483 scope, bus, strdesc, sizeof (*strdesc));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
484 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
485
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
486 /* Set the audio callback */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
487 memset(&callback, '\0', sizeof (AURenderCallbackStruct));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
488 callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
489 callback.inputProcRefCon = this;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
490 result = AudioUnitSetProperty(this->hidden->audioUnit,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
491 kAudioUnitProperty_SetRenderCallback,
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
492 scope, bus, &callback, sizeof (callback));
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
493 CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_SetInputCallback)");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
494
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
495 /* Calculate the final parameters for this audio specification */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
496 SDL_CalculateAudioSpec(&this->spec);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
497
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
498 /* Allocate a sample buffer */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
499 this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
500 this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
501
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
502 result = AudioUnitInitialize(this->hidden->audioUnit);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
503 CHECK_RESULT("AudioUnitInitialize");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
504
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
505 /* Finally, start processing of the audio unit */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
506 result = AudioOutputUnitStart(this->hidden->audioUnit);
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
507 CHECK_RESULT("AudioOutputUnitStart");
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
508
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
509 /* We're running! */
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
510 return 1;
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
511 }
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
512
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
513
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
514 int
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
515 COREAUDIO_OpenAudio(_THIS, const char *devname, int iscapture)
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
516 {
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
517 AudioStreamBasicDescription strdesc;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
518 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
519 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
520
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
521 /* Initialize all variables that we clean on shutdown */
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
522 this->hidden = (struct SDL_PrivateAudioData *)
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
523 SDL_malloc((sizeof *this->hidden));
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
524 if (this->hidden == NULL) {
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
525 SDL_OutOfMemory();
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
526 return (0);
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
527 }
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
528 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
529
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
530 this->hidden->isCapture = iscapture;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
531
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
532 /* Setup a AudioStreamBasicDescription with the requested format */
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
533 memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
534 strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
535 strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
536 strdesc.mChannelsPerFrame = this->spec.channels;
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
537 strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
538 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
539
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
540 while ((!valid_datatype) && (test_format)) {
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
541 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
542 /* 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
543 switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
544 case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
545 case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
546 case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
547 case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
548 case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
549 case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
550 case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
551 case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
552 case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
553 case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
554 valid_datatype = 1;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
555 strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
556 if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
557 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
558
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
559 if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
560 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
561 else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
562 strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
563 break;
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 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
566
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
567 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
568 SDL_SetError("Unsupported audio format");
3784
37c9c4590689 First batch of heavy lifting on supporting multiple audio devices at once.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
569 return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
570 }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
571
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
572 strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
573 strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
574 strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
575 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
576
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
577 if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
578 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
579 }
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
580
3785
da2ea0694d11 Ton of work on CoreAudio driver for new 1.3 features...most of the
Ryan C. Gordon <icculus@icculus.org>
parents: 3784
diff changeset
581 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
582 }
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
583
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
584 /* vi: set ts=4 sw=4 expandtab: */