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annotate src/audio/macrom/SDL_romaudio.c @ 1895:c121d94672cb

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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 10 Jul 2006 21:04:37 +0000
parents f12379c41042
children c27292a690b7
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 #if defined(__APPLE__) && defined(__MACH__)
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25 # include <Carbon/Carbon.h>
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26 #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335)
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27 # include <Carbon.h>
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28 #else
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29 # include <Sound.h> /* SoundManager interface */
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30 # include <Gestalt.h>
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31 # include <DriverServices.h>
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32 #endif
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33
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34 #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335)
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35 #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */
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36 #define NewSndCallBackUPP NewSndCallBackProc
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37 #endif
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38 #if !defined(NewSndCallBackUPP)
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39 #define NewSndCallBackUPP NewSndCallBackProc
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40 #endif
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41 #endif
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42
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43 #include "SDL_audio.h"
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44 #include "../SDL_audio_c.h"
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45 #include "../SDL_sysaudio.h"
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46 #include "SDL_romaudio.h"
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47
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48 /* Audio driver functions */
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49
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50 static void Mac_CloseAudio(_THIS);
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51 static int Mac_OpenAudio(_THIS, SDL_AudioSpec * spec);
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52 static void Mac_LockAudio(_THIS);
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53 static void Mac_UnlockAudio(_THIS);
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54
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55 /* Audio driver bootstrap functions */
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56
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57
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58 static int
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59 Audio_Available(void)
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60 {
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61 return (1);
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62 }
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63
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64 static void
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65 Audio_DeleteDevice(SDL_AudioDevice * device)
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66 {
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67 SDL_free(device->hidden);
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68 SDL_free(device);
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69 }
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70
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71 static SDL_AudioDevice *
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72 Audio_CreateDevice(int devindex)
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73 {
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74 SDL_AudioDevice *this;
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75
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76 /* Initialize all variables that we clean on shutdown */
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77 this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
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78 if (this) {
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79 SDL_memset(this, 0, (sizeof *this));
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80 this->hidden = (struct SDL_PrivateAudioData *)
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81 SDL_malloc((sizeof *this->hidden));
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82 }
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83 if ((this == NULL) || (this->hidden == NULL)) {
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84 SDL_OutOfMemory();
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85 if (this) {
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86 SDL_free(this);
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87 }
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88 return (0);
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89 }
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90 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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91
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92 /* Set the function pointers */
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93 this->OpenAudio = Mac_OpenAudio;
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94 this->CloseAudio = Mac_CloseAudio;
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95 this->LockAudio = Mac_LockAudio;
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96 this->UnlockAudio = Mac_UnlockAudio;
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97 this->free = Audio_DeleteDevice;
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98
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99 #ifdef __MACOSX__ /* Mac OS X uses threaded audio, so normal thread code is okay */
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100 this->LockAudio = NULL;
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101 this->UnlockAudio = NULL;
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102 #endif
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103 return this;
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104 }
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105
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106 AudioBootStrap SNDMGR_bootstrap = {
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107 "sndmgr", "MacOS SoundManager 3.0",
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108 Audio_Available, Audio_CreateDevice
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109 };
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110
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111 #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE)
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112 /* This works correctly on Mac OS X */
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113
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114 #pragma options align=power
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115
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116 static volatile SInt32 audio_is_locked = 0;
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117 static volatile SInt32 need_to_mix = 0;
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118
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119 static UInt8 *buffer[2];
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120 static volatile UInt32 running = 0;
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121 static CmpSoundHeader header;
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122 static volatile Uint32 fill_me = 0;
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123
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124 static void
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125 mix_buffer(SDL_AudioDevice * audio, UInt8 * buffer)
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126 {
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127 if (!audio->paused) {
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128 #ifdef __MACOSX__
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129 SDL_mutexP(audio->mixer_lock);
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130 #endif
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131 if (audio->convert.needed) {
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132 audio->spec.callback(audio->spec.userdata,
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133 (Uint8 *) audio->convert.buf,
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134 audio->convert.len);
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135 SDL_ConvertAudio(&audio->convert);
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136 if (audio->convert.len_cvt != audio->spec.size) {
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137 /* Uh oh... probably crashes here */ ;
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138 }
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139 SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt);
323
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140 } else {
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141 audio->spec.callback(audio->spec.userdata, buffer,
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142 audio->spec.size);
323
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143 }
1402
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144 #ifdef __MACOSX__
348
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145 SDL_mutexV(audio->mixer_lock);
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146 #endif
323
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147 }
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148
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149 DecrementAtomic((SInt32 *) & need_to_mix);
323
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150 }
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151
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152 static void
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153 Mac_LockAudio(_THIS)
323
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154 {
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155 IncrementAtomic((SInt32 *) & audio_is_locked);
323
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156 }
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157
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158 static void
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159 Mac_UnlockAudio(_THIS)
323
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160 {
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161 SInt32 oldval;
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162
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163 oldval = DecrementAtomic((SInt32 *) & audio_is_locked);
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164 if (oldval != 1) /* != 1 means audio is still locked. */
323
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165 return;
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166
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167 /* Did we miss the chance to mix in an interrupt? Do it now. */
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168 if (BitAndAtomic(0xFFFFFFFF, (UInt32 *) & need_to_mix)) {
323
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169 /*
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170 * Note that this could be a problem if you missed an interrupt
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171 * while the audio was locked, and get preempted by a second
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172 * interrupt here, but that means you locked for way too long anyhow.
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173 */
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174 mix_buffer(this, buffer[fill_me]);
323
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175 }
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176 }
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177
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178 static void
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179 callBackProc(SndChannel * chan, SndCommand * cmd_passed)
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180 {
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181 UInt32 play_me;
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182 SndCommand cmd;
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183 SDL_AudioDevice *audio = (SDL_AudioDevice *) chan->userInfo;
323
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184
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185 IncrementAtomic((SInt32 *) & need_to_mix);
323
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diff changeset
186
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187 fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */
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188 play_me = !fill_me; /* filled buffer to play _now_ */
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189
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190 if (!audio->enabled) {
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191 return;
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192 }
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193
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194 /* queue previously mixed buffer for playback. */
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195 header.samplePtr = (Ptr) buffer[play_me];
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196 cmd.cmd = bufferCmd;
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197 cmd.param1 = 0;
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198 cmd.param2 = (long) &header;
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199 SndDoCommand(chan, &cmd, 0);
47
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200
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201 memset(buffer[fill_me], 0, audio->spec.size);
47
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diff changeset
202
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203 /*
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204 * if audio device isn't locked, mix the next buffer to be queued in
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205 * the memory block that just finished playing.
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206 */
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207 if (!BitAndAtomic(0xFFFFFFFF, (UInt32 *) & audio_is_locked)) {
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208 mix_buffer(audio, buffer[fill_me]);
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209 }
323
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diff changeset
210
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211 /* set this callback to run again when current buffer drains. */
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212 if (running) {
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213 cmd.cmd = callBackCmd;
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214 cmd.param1 = 0;
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215 cmd.param2 = play_me;
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216
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217 SndDoCommand(chan, &cmd, 0);
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218 }
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219 }
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220
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221 static int
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222 Mac_OpenAudio(_THIS, SDL_AudioSpec * spec)
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223 {
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224
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225 SndCallBackUPP callback;
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226 int sample_bits;
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227 int i;
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228 long initOptions;
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229
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230 /* Very few conversions are required, but... */
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231 switch (spec->format) {
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232 case AUDIO_S8:
0
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233 spec->format = AUDIO_U8;
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234 break;
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235 case AUDIO_U16LSB:
0
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236 spec->format = AUDIO_S16LSB;
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237 break;
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238 case AUDIO_U16MSB:
0
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239 spec->format = AUDIO_S16MSB;
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240 break;
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241 }
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242 SDL_CalculateAudioSpec(spec);
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243
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244 /* initialize bufferCmd header */
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245 memset(&header, 0, sizeof(header));
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246 callback = (SndCallBackUPP) NewSndCallBackUPP(callBackProc);
0
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247 sample_bits = spec->size / spec->samples / spec->channels * 8;
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248
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249 #ifdef DEBUG_AUDIO
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250 fprintf(stderr,
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251 "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n",
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252 spec->format, spec->channels, sample_bits, spec->freq);
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253 #endif /* DEBUG_AUDIO */
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254
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255 header.numChannels = spec->channels;
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256 header.sampleSize = sample_bits;
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257 header.sampleRate = spec->freq << 16;
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258 header.numFrames = spec->samples;
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259 header.encode = cmpSH;
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260
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261 /* Note that we install the 16bitLittleEndian Converter if needed. */
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262 if (spec->format == 0x8010) {
0
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263 header.compressionID = fixedCompression;
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264 header.format = k16BitLittleEndianFormat;
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265 }
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266
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267 /* allocate 2 buffers */
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268 for (i = 0; i < 2; i++) {
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269 buffer[i] = (UInt8 *) malloc(sizeof(UInt8) * spec->size);
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270 if (buffer[i] == NULL) {
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271 SDL_OutOfMemory();
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272 return (-1);
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273 }
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274 memset(buffer[i], 0, spec->size);
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275 }
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276
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277 /* Create the sound manager channel */
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278 channel = (SndChannelPtr) SDL_malloc(sizeof(*channel));
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279 if (channel == NULL) {
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280 SDL_OutOfMemory();
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281 return (-1);
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282 }
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283 if (spec->channels >= 2) {
0
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284 initOptions = initStereo;
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285 } else {
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286 initOptions = initMono;
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287 }
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288 channel->userInfo = (long) this;
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289 channel->qLength = 128;
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290 if (SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr) {
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291 SDL_SetError("Unable to create audio channel");
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292 SDL_free(channel);
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293 channel = NULL;
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294 return (-1);
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295 }
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296
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297 /* start playback */
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298 {
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299 SndCommand cmd;
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300 cmd.cmd = callBackCmd;
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301 cmd.param2 = 0;
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302 running = 1;
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303 SndDoCommand(channel, &cmd, 0);
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304 }
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305
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306 return 1;
0
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307 }
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308
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309 static void
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310 Mac_CloseAudio(_THIS)
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311 {
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312
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313 int i;
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314
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315 running = 0;
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316
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317 if (channel) {
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318 SndDisposeChannel(channel, true);
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319 channel = NULL;
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320 }
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321
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322 for (i = 0; i < 2; ++i) {
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323 if (buffer[i]) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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324 SDL_free(buffer[i]);
0
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325 buffer[i] = NULL;
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326 }
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327 }
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328 }
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329
323
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diff changeset
330 #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */
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diff changeset
331
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diff changeset
332 static void
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333 Mac_LockAudio(_THIS)
323
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diff changeset
334 {
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diff changeset
335 /* no-op. */
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diff changeset
336 }
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diff changeset
337
1895
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diff changeset
338 static void
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339 Mac_UnlockAudio(_THIS)
323
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diff changeset
340 {
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diff changeset
341 /* no-op. */
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diff changeset
342 }
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diff changeset
343
0
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344
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345 /* This function is called by Sound Manager when it has exhausted one of
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diff changeset
346 the buffers, so we'll zero it to silence and fill it with audio if
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347 we're not paused.
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348 */
1895
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349 static pascal void
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350 sndDoubleBackProc(SndChannelPtr chan, SndDoubleBufferPtr newbuf)
0
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351 {
1895
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diff changeset
352 SDL_AudioDevice *audio = (SDL_AudioDevice *) newbuf->dbUserInfo[0];
0
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353
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354 /* If audio is quitting, don't do anything */
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355 if (!audio->enabled) {
0
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diff changeset
356 return;
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diff changeset
357 }
1895
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358 memset(newbuf->dbSoundData, 0, audio->spec.size);
0
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diff changeset
359 newbuf->dbNumFrames = audio->spec.samples;
1895
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Sam Lantinga <slouken@libsdl.org>
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360 if (!audio->paused) {
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diff changeset
361 if (audio->convert.needed) {
0
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362 audio->spec.callback(audio->spec.userdata,
1895
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363 (Uint8 *) audio->convert.buf,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
364 audio->convert.len);
0
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diff changeset
365 SDL_ConvertAudio(&audio->convert);
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366 #if 0
1895
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367 if (audio->convert.len_cvt != audio->spec.size) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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368 /* Uh oh... probably crashes here */ ;
0
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diff changeset
369 }
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370 #endif
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
371 SDL_memcpy(newbuf->dbSoundData, audio->convert.buf,
1895
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
372 audio->convert.len_cvt);
0
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diff changeset
373 } else {
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diff changeset
374 audio->spec.callback(audio->spec.userdata,
1895
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375 (Uint8 *) newbuf->dbSoundData,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
376 audio->spec.size);
0
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parents:
diff changeset
377 }
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diff changeset
378 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
379 newbuf->dbFlags |= dbBufferReady;
0
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diff changeset
380 }
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diff changeset
381
1895
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diff changeset
382 static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
383 DoubleBufferAudio_Available(void)
0
74212992fb08 Initial revision
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diff changeset
384 {
74212992fb08 Initial revision
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diff changeset
385 int available;
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Sam Lantinga <slouken@lokigames.com>
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diff changeset
386 NumVersion sndversion;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
387 long response;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
388
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diff changeset
389 available = 0;
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diff changeset
390 sndversion = SndSoundManagerVersion();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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391 if (sndversion.majorRev >= 3) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
392 if (Gestalt(gestaltSoundAttr, &response) == noErr) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
393 if ((response & (1 << gestaltSndPlayDoubleBuffer))) {
0
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diff changeset
394 available = 1;
74212992fb08 Initial revision
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parents:
diff changeset
395 }
74212992fb08 Initial revision
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diff changeset
396 }
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diff changeset
397 } else {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
398 if (Gestalt(gestaltSoundAttr, &response) == noErr) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
399 if ((response & (1 << gestaltHasASC))) {
0
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diff changeset
400 available = 1;
74212992fb08 Initial revision
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parents:
diff changeset
401 }
74212992fb08 Initial revision
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parents:
diff changeset
402 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
404 return (available);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
405 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
407 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
408 Mac_CloseAudio(_THIS)
0
74212992fb08 Initial revision
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parents:
diff changeset
409 {
74212992fb08 Initial revision
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parents:
diff changeset
410 int i;
74212992fb08 Initial revision
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parents:
diff changeset
411
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
412 if (channel != NULL) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 /* Clean up the audio channel */
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diff changeset
414 SndDisposeChannel(channel, true);
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diff changeset
415 channel = NULL;
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416 }
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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417 for (i = 0; i < 2; ++i) {
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418 if (audio_buf[i]) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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419 SDL_free(audio_buf[i]);
0
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420 audio_buf[i] = NULL;
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421 }
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diff changeset
422 }
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diff changeset
423 }
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diff changeset
424
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
425 static int
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426 Mac_OpenAudio(_THIS, SDL_AudioSpec * spec)
0
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diff changeset
427 {
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428 SndDoubleBufferHeader2 audio_dbh;
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429 int i;
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430 long initOptions;
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431 int sample_bits;
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432 SndDoubleBackUPP doubleBackProc;
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433
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434 /* Check to make sure double-buffered audio is available */
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435 if (!DoubleBufferAudio_Available()) {
0
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436 SDL_SetError("Sound manager doesn't support double-buffering");
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437 return (-1);
0
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parents:
diff changeset
438 }
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diff changeset
439
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diff changeset
440 /* Very few conversions are required, but... */
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diff changeset
441 switch (spec->format) {
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442 case AUDIO_S8:
0
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443 spec->format = AUDIO_U8;
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444 break;
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diff changeset
445 case AUDIO_U16LSB:
0
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446 spec->format = AUDIO_S16LSB;
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447 break;
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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448 case AUDIO_U16MSB:
0
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449 spec->format = AUDIO_S16MSB;
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450 break;
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451 }
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452 SDL_CalculateAudioSpec(spec);
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453
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454 /* initialize the double-back header */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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parents: 1312
diff changeset
455 SDL_memset(&audio_dbh, 0, sizeof(audio_dbh));
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456 doubleBackProc = NewSndDoubleBackProc(sndDoubleBackProc);
0
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diff changeset
457 sample_bits = spec->size / spec->samples / spec->channels * 8;
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diff changeset
458
0
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diff changeset
459 audio_dbh.dbhNumChannels = spec->channels;
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diff changeset
460 audio_dbh.dbhSampleSize = sample_bits;
0
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diff changeset
461 audio_dbh.dbhCompressionID = 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1621
diff changeset
462 audio_dbh.dbhPacketSize = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
463 audio_dbh.dbhSampleRate = spec->freq << 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
464 audio_dbh.dbhDoubleBack = doubleBackProc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
465 audio_dbh.dbhFormat = 0;
0
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parents:
diff changeset
466
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parents:
diff changeset
467 /* Note that we install the 16bitLittleEndian Converter if needed. */
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
468 if (spec->format == 0x8010) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 audio_dbh.dbhCompressionID = fixedCompression;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 audio_dbh.dbhFormat = k16BitLittleEndianFormat;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 }
74212992fb08 Initial revision
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parents:
diff changeset
472
74212992fb08 Initial revision
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parents:
diff changeset
473 /* allocate the 2 double-back buffers */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
474 for (i = 0; i < 2; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
475 audio_buf[i] = SDL_calloc(1, sizeof(SndDoubleBuffer) + spec->size);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
476 if (audio_buf[i] == NULL) {
0
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parents:
diff changeset
477 SDL_OutOfMemory();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
478 return (-1);
0
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parents:
diff changeset
479 }
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parents:
diff changeset
480 audio_buf[i]->dbNumFrames = spec->samples;
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parents:
diff changeset
481 audio_buf[i]->dbFlags = dbBufferReady;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
482 audio_buf[i]->dbUserInfo[0] = (long) this;
0
74212992fb08 Initial revision
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parents:
diff changeset
483 audio_dbh.dbhBufferPtr[i] = audio_buf[i];
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
484 }
74212992fb08 Initial revision
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parents:
diff changeset
485
74212992fb08 Initial revision
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parents:
diff changeset
486 /* Create the sound manager channel */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
487 channel = (SndChannelPtr) SDL_malloc(sizeof(*channel));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1621
diff changeset
488 if (channel == NULL) {
0
74212992fb08 Initial revision
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parents:
diff changeset
489 SDL_OutOfMemory();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
490 return (-1);
0
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parents:
diff changeset
491 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
492 if (spec->channels >= 2) {
0
74212992fb08 Initial revision
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parents:
diff changeset
493 initOptions = initStereo;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
494 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495 initOptions = initMono;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
496 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 channel->userInfo = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 channel->qLength = 128;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
499 if (SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 SDL_SetError("Unable to create audio channel");
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
501 SDL_free(channel);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 channel = NULL;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
503 return (-1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
505
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 /* Start playback */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
507 if (SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr) & audio_dbh)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
508 != noErr) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
509 SDL_SetError("Unable to play double buffered audio");
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
510 return (-1);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
512
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513 return 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515
323
b7e8038e40ae The audio lock and unlock functions are now a part of the driver.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
516 #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1621
diff changeset
517 /* vi: set ts=4 sw=4 expandtab: */