annotate src/audio/macrom/SDL_romaudio.c @ 1358:c71e05b4dc2e

More header massaging... works great on Windows. ;-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 10 Feb 2006 06:48:43 +0000
parents 604d73db6802
children 19418e4422cb
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
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23 #if defined(__APPLE__) && defined(__MACH__)
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24 # include <Carbon/Carbon.h>
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25 #elif TARGET_API_MAC_CARBON && (UNIVERSAL_INTERFACES_VERSION > 0x0335)
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26 # include <Carbon.h>
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27 #else
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28 # include <Sound.h> /* SoundManager interface */
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29 # include <Gestalt.h>
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30 # include <DriverServices.h>
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31 #endif
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32
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33 #if !defined(NewSndCallBackUPP) && (UNIVERSAL_INTERFACES_VERSION < 0x0335)
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34 #if !defined(NewSndCallBackProc) /* avoid circular redefinition... */
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35 #define NewSndCallBackUPP NewSndCallBackProc
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36 #endif
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37 #if !defined(NewSndCallBackUPP)
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38 #define NewSndCallBackUPP NewSndCallBackProc
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39 #endif
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40 #endif
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41
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42 #include "SDL_audio.h"
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43 #include "SDL_audio_c.h"
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44 #include "SDL_audiomem.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 Audio_Available(void)
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59 {
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60 return(1);
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61 }
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62
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63 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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64 {
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65 SDL_free(device->hidden);
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66 SDL_free(device);
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67 }
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68
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69 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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70 {
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71 SDL_AudioDevice *this;
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72
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73 /* Initialize all variables that we clean on shutdown */
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74 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
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75 if ( this ) {
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76 SDL_memset(this, 0, (sizeof *this));
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77 this->hidden = (struct SDL_PrivateAudioData *)
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78 SDL_malloc((sizeof *this->hidden));
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79 }
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80 if ( (this == NULL) || (this->hidden == NULL) ) {
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81 SDL_OutOfMemory();
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82 if ( this ) {
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83 SDL_free(this);
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84 }
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85 return(0);
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86 }
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87 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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88
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89 /* Set the function pointers */
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90 this->OpenAudio = Mac_OpenAudio;
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91 this->CloseAudio = Mac_CloseAudio;
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92 this->LockAudio = Mac_LockAudio;
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93 this->UnlockAudio = Mac_UnlockAudio;
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94 this->free = Audio_DeleteDevice;
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95
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96 #ifdef MACOSX /* MacOS X uses threaded audio, so normal thread code is okay */
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97 this->LockAudio = NULL;
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98 this->UnlockAudio = NULL;
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99 #endif
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100 return this;
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101 }
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102
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103 AudioBootStrap SNDMGR_bootstrap = {
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104 "sndmgr", "MacOS SoundManager 3.0",
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105 Audio_Available, Audio_CreateDevice
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106 };
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107
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108 #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE)
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109 /* This works correctly on MacOS X */
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110
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111 #pragma options align=power
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112
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113 static volatile SInt32 audio_is_locked = 0;
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114 static volatile SInt32 need_to_mix = 0;
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115
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116 static UInt8 *buffer[2];
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117 static volatile UInt32 running = 0;
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118 static CmpSoundHeader header;
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119 static volatile Uint32 fill_me = 0;
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120
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121 static void mix_buffer(SDL_AudioDevice *audio, UInt8 *buffer)
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122 {
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123 if ( ! audio->paused ) {
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124 #ifdef MACOSX
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125 SDL_mutexP(audio->mixer_lock);
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126 #endif
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127 if ( audio->convert.needed ) {
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128 audio->spec.callback(audio->spec.userdata,
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129 (Uint8 *)audio->convert.buf,audio->convert.len);
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130 SDL_ConvertAudio(&audio->convert);
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131 if ( audio->convert.len_cvt != audio->spec.size ) {
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132 /* Uh oh... probably crashes here */;
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133 }
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134 SDL_memcpy(buffer, audio->convert.buf, audio->convert.len_cvt);
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135 } else {
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136 audio->spec.callback(audio->spec.userdata, buffer, audio->spec.size);
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137 }
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138 #ifdef MACOSX
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139 SDL_mutexV(audio->mixer_lock);
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140 #endif
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141 }
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142
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143 DecrementAtomic((SInt32 *) &need_to_mix);
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144 }
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145
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146 static void Mac_LockAudio(_THIS)
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147 {
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148 IncrementAtomic((SInt32 *) &audio_is_locked);
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149 }
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150
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151 static void Mac_UnlockAudio(_THIS)
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152 {
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153 SInt32 oldval;
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154
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155 oldval = DecrementAtomic((SInt32 *) &audio_is_locked);
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156 if ( oldval != 1 ) /* != 1 means audio is still locked. */
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157 return;
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158
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159 /* Did we miss the chance to mix in an interrupt? Do it now. */
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160 if ( BitAndAtomic (0xFFFFFFFF, (UInt32 *) &need_to_mix) ) {
323
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161 /*
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162 * Note that this could be a problem if you missed an interrupt
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163 * while the audio was locked, and get preempted by a second
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164 * interrupt here, but that means you locked for way too long anyhow.
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165 */
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166 mix_buffer (this, buffer[fill_me]);
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167 }
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168 }
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169
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170 static void callBackProc (SndChannel *chan, SndCommand *cmd_passed ) {
323
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171 UInt32 play_me;
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172 SndCommand cmd;
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173 SDL_AudioDevice *audio = (SDL_AudioDevice *)chan->userInfo;
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174
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175 IncrementAtomic((SInt32 *) &need_to_mix);
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176
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177 fill_me = cmd_passed->param2; /* buffer that has just finished playing, so fill it */
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178 play_me = ! fill_me; /* filled buffer to play _now_ */
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179
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180 if ( ! audio->enabled ) {
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181 return;
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182 }
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183
323
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184 /* queue previously mixed buffer for playback. */
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185 header.samplePtr = (Ptr)buffer[play_me];
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186 cmd.cmd = bufferCmd;
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187 cmd.param1 = 0;
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188 cmd.param2 = (long)&header;
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189 SndDoCommand (chan, &cmd, 0);
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190
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191 memset (buffer[fill_me], 0, audio->spec.size);
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192
323
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193 /*
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194 * if audio device isn't locked, mix the next buffer to be queued in
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195 * the memory block that just finished playing.
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196 */
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197 if ( ! BitAndAtomic(0xFFFFFFFF, (UInt32 *) &audio_is_locked) ) {
323
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198 mix_buffer (audio, buffer[fill_me]);
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199 }
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200
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201 /* set this callback to run again when current buffer drains. */
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202 if ( running ) {
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203 cmd.cmd = callBackCmd;
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204 cmd.param1 = 0;
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205 cmd.param2 = play_me;
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206
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207 SndDoCommand (chan, &cmd, 0);
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208 }
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209 }
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210
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211 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec) {
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212
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213 SndCallBackUPP callback;
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214 int sample_bits;
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215 int i;
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216 long initOptions;
323
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217
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218 /* Very few conversions are required, but... */
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219 switch (spec->format) {
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220 case AUDIO_S8:
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221 spec->format = AUDIO_U8;
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222 break;
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223 case AUDIO_U16LSB:
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224 spec->format = AUDIO_S16LSB;
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225 break;
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226 case AUDIO_U16MSB:
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227 spec->format = AUDIO_S16MSB;
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228 break;
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229 }
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230 SDL_CalculateAudioSpec(spec);
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231
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232 /* initialize bufferCmd header */
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233 memset (&header, 0, sizeof(header));
1133
609c060fd2a2 The MacOSX Carbon/Cocoa/X11 all in one library patch. Relevant emails:
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diff changeset
234 callback = (SndCallBackUPP) NewSndCallBackUPP (callBackProc);
0
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235 sample_bits = spec->size / spec->samples / spec->channels * 8;
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236
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237 #ifdef DEBUG_AUDIO
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238 fprintf(stderr,
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239 "Audio format 0x%x, channels = %d, sample_bits = %d, frequency = %d\n",
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240 spec->format, spec->channels, sample_bits, spec->freq);
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241 #endif /* DEBUG_AUDIO */
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242
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243 header.numChannels = spec->channels;
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244 header.sampleSize = sample_bits;
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245 header.sampleRate = spec->freq << 16;
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246 header.numFrames = spec->samples;
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247 header.encode = cmpSH;
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248
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249 /* Note that we install the 16bitLittleEndian Converter if needed. */
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250 if ( spec->format == 0x8010 ) {
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251 header.compressionID = fixedCompression;
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252 header.format = k16BitLittleEndianFormat;
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253 }
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254
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255 /* allocate 2 buffers */
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256 for (i=0; i<2; i++) {
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257 buffer[i] = (UInt8*)malloc (sizeof(UInt8) * spec->size);
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258 if (buffer[i] == NULL) {
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259 SDL_OutOfMemory();
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260 return (-1);
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261 }
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262 memset (buffer[i], 0, spec->size);
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263 }
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264
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265 /* Create the sound manager channel */
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266 channel = (SndChannelPtr)SDL_malloc(sizeof(*channel));
0
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267 if ( channel == NULL ) {
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268 SDL_OutOfMemory();
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269 return(-1);
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270 }
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271 if ( spec->channels >= 2 ) {
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272 initOptions = initStereo;
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273 } else {
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274 initOptions = initMono;
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275 }
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276 channel->userInfo = (long)this;
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277 channel->qLength = 128;
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278 if ( SndNewChannel(&channel, sampledSynth, initOptions, callback) != noErr ) {
0
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279 SDL_SetError("Unable to create audio channel");
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diff changeset
280 SDL_free(channel);
0
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281 channel = NULL;
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282 return(-1);
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283 }
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284
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285 /* start playback */
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286 {
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287 SndCommand cmd;
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288 cmd.cmd = callBackCmd;
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289 cmd.param2 = 0;
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290 running = 1;
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291 SndDoCommand (channel, &cmd, 0);
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292 }
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293
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294 return 1;
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295 }
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296
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297 static void Mac_CloseAudio(_THIS) {
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298
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299 int i;
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300
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301 running = 0;
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302
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303 if (channel) {
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304 SndDisposeChannel (channel, true);
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305 channel = NULL;
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306 }
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307
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308 for ( i=0; i<2; ++i ) {
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309 if ( buffer[i] ) {
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310 SDL_free(buffer[i]);
0
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311 buffer[i] = NULL;
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312 }
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313 }
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314 }
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315
323
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316 #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */
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317
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318 static void Mac_LockAudio(_THIS)
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319 {
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320 /* no-op. */
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321 }
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diff changeset
322
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diff changeset
323 static void Mac_UnlockAudio(_THIS)
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diff changeset
324 {
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325 /* no-op. */
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326 }
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diff changeset
327
0
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328
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329 /* This function is called by Sound Manager when it has exhausted one of
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330 the buffers, so we'll zero it to silence and fill it with audio if
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331 we're not paused.
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332 */
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diff changeset
333 static pascal
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334 void sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf)
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335 {
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336 SDL_AudioDevice *audio = (SDL_AudioDevice *)newbuf->dbUserInfo[0];
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337
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338 /* If audio is quitting, don't do anything */
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parents:
diff changeset
339 if ( ! audio->enabled ) {
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340 return;
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diff changeset
341 }
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342 memset (newbuf->dbSoundData, 0, audio->spec.size);
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343 newbuf->dbNumFrames = audio->spec.samples;
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344 if ( ! audio->paused ) {
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345 if ( audio->convert.needed ) {
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346 audio->spec.callback(audio->spec.userdata,
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347 (Uint8 *)audio->convert.buf,audio->convert.len);
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348 SDL_ConvertAudio(&audio->convert);
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349 #if 0
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350 if ( audio->convert.len_cvt != audio->spec.size ) {
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parents:
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351 /* Uh oh... probably crashes here */;
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diff changeset
352 }
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353 #endif
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diff changeset
354 SDL_memcpy(newbuf->dbSoundData, audio->convert.buf,
0
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parents:
diff changeset
355 audio->convert.len_cvt);
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diff changeset
356 } else {
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diff changeset
357 audio->spec.callback(audio->spec.userdata,
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diff changeset
358 (Uint8 *)newbuf->dbSoundData, audio->spec.size);
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parents:
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359 }
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diff changeset
360 }
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diff changeset
361 newbuf->dbFlags |= dbBufferReady;
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diff changeset
362 }
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parents:
diff changeset
363
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parents:
diff changeset
364 static int DoubleBufferAudio_Available(void)
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parents:
diff changeset
365 {
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parents:
diff changeset
366 int available;
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parents:
diff changeset
367 NumVersion sndversion;
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parents:
diff changeset
368 long response;
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parents:
diff changeset
369
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diff changeset
370 available = 0;
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parents:
diff changeset
371 sndversion = SndSoundManagerVersion();
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parents:
diff changeset
372 if ( sndversion.majorRev >= 3 ) {
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parents:
diff changeset
373 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) {
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parents:
diff changeset
374 if ( (response & (1 << gestaltSndPlayDoubleBuffer)) ) {
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diff changeset
375 available = 1;
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parents:
diff changeset
376 }
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parents:
diff changeset
377 }
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parents:
diff changeset
378 } else {
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parents:
diff changeset
379 if ( Gestalt(gestaltSoundAttr, &response) == noErr ) {
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parents:
diff changeset
380 if ( (response & (1 << gestaltHasASC)) ) {
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parents:
diff changeset
381 available = 1;
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parents:
diff changeset
382 }
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parents:
diff changeset
383 }
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parents:
diff changeset
384 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
385 return(available);
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parents:
diff changeset
386 }
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parents:
diff changeset
387
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parents:
diff changeset
388 static void Mac_CloseAudio(_THIS)
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parents:
diff changeset
389 {
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parents:
diff changeset
390 int i;
74212992fb08 Initial revision
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parents:
diff changeset
391
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parents:
diff changeset
392 if ( channel != NULL ) {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 /* Clean up the audio channel */
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parents:
diff changeset
394 SndDisposeChannel(channel, true);
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parents:
diff changeset
395 channel = NULL;
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parents:
diff changeset
396 }
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parents:
diff changeset
397 for ( i=0; i<2; ++i ) {
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parents:
diff changeset
398 if ( audio_buf[i] ) {
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
399 SDL_free(audio_buf[i]);
0
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parents:
diff changeset
400 audio_buf[i] = NULL;
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parents:
diff changeset
401 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
404
74212992fb08 Initial revision
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parents:
diff changeset
405 static int Mac_OpenAudio(_THIS, SDL_AudioSpec *spec)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
406 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
407 SndDoubleBufferHeader2 audio_dbh;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
408 int i;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
409 long initOptions;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
410 int sample_bits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411 SndDoubleBackUPP doubleBackProc;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 /* Check to make sure double-buffered audio is available */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 if ( ! DoubleBufferAudio_Available() ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
415 SDL_SetError("Sound manager doesn't support double-buffering");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
417 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 /* Very few conversions are required, but... */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420 switch (spec->format) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 case AUDIO_S8:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
422 spec->format = AUDIO_U8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
423 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
424 case AUDIO_U16LSB:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
425 spec->format = AUDIO_S16LSB;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
426 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427 case AUDIO_U16MSB:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
428 spec->format = AUDIO_S16MSB;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
429 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
430 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
431 SDL_CalculateAudioSpec(spec);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
432
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
433 /* initialize the double-back header */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
434 SDL_memset(&audio_dbh, 0, sizeof(audio_dbh));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
435 doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
436 sample_bits = spec->size / spec->samples / spec->channels * 8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
437
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
438 audio_dbh.dbhNumChannels = spec->channels;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
439 audio_dbh.dbhSampleSize = sample_bits;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
440 audio_dbh.dbhCompressionID = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
441 audio_dbh.dbhPacketSize = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
442 audio_dbh.dbhSampleRate = spec->freq << 16;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
443 audio_dbh.dbhDoubleBack = doubleBackProc;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
444 audio_dbh.dbhFormat = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
445
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
446 /* Note that we install the 16bitLittleEndian Converter if needed. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
447 if ( spec->format == 0x8010 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
448 audio_dbh.dbhCompressionID = fixedCompression;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
449 audio_dbh.dbhFormat = k16BitLittleEndianFormat;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
450 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
451
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
452 /* allocate the 2 double-back buffers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
453 for ( i=0; i<2; ++i ) {
1338
604d73db6802 Removed uses of stdlib.h and string.h
Sam Lantinga <slouken@libsdl.org>
parents: 1336
diff changeset
454 audio_buf[i] = SDL_calloc(1, sizeof(SndDoubleBuffer)+spec->size);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
455 if ( audio_buf[i] == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
456 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
457 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
458 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
459 audio_buf[i]->dbNumFrames = spec->samples;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
460 audio_buf[i]->dbFlags = dbBufferReady;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
461 audio_buf[i]->dbUserInfo[0] = (long)this;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
462 audio_dbh.dbhBufferPtr[i] = audio_buf[i];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
463 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
464
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
465 /* Create the sound manager channel */
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents: 1312
diff changeset
466 channel = (SndChannelPtr)SDL_malloc(sizeof(*channel));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
467 if ( channel == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
468 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
469 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
470 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 if ( spec->channels >= 2 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
472 initOptions = initStereo;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
473 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
474 initOptions = initMono;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
475 }
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476 channel->userInfo = 0;
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477 channel->qLength = 128;
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478 if ( SndNewChannel(&channel, sampledSynth, initOptions, 0L) != noErr ) {
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479 SDL_SetError("Unable to create audio channel");
1336
3692456e7b0f Use SDL_ prefixed versions of C library functions.
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480 SDL_free(channel);
0
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481 channel = NULL;
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482 return(-1);
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483 }
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484
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485 /* Start playback */
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486 if ( SndPlayDoubleBuffer(channel, (SndDoubleBufferHeaderPtr)&audio_dbh)
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487 != noErr ) {
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488 SDL_SetError("Unable to play double buffered audio");
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489 return(-1);
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490 }
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491
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492 return 1;
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493 }
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494
323
b7e8038e40ae The audio lock and unlock functions are now a part of the driver.
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495 #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */
0
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496