Mercurial > sdl-ios-xcode
annotate src/audio/macrom/SDL_romaudio.c @ 1663:11775724e3fe SDL-1.3
fine tuning indent output
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 28 May 2006 13:29:03 +0000 |
parents | 782fd950bd46 |
children | 4da1ee79c9af |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
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 |
0 | 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. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 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 |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 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) |
0 | 27 # include <Carbon.h> |
28 #else | |
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29 # include <Sound.h> /* SoundManager interface */ |
0 | 30 # include <Gestalt.h> |
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31 # include <DriverServices.h> |
0 | 32 #endif |
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 |
0 | 43 #include "SDL_audio.h" |
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44 #include "../SDL_audio_c.h" |
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45 #include "../SDL_sysaudio.h" |
0 | 46 #include "SDL_romaudio.h" |
47 | |
48 /* Audio driver functions */ | |
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); |
0 | 54 |
55 /* Audio driver bootstrap functions */ | |
56 | |
57 | |
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58 static int |
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59 Audio_Available (void) |
0 | 60 { |
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61 return (1); |
0 | 62 } |
63 | |
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64 static void |
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65 Audio_DeleteDevice (SDL_AudioDevice * device) |
0 | 66 { |
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67 SDL_free (device->hidden); |
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68 SDL_free (device); |
0 | 69 } |
70 | |
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71 static SDL_AudioDevice * |
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72 Audio_CreateDevice (int devindex) |
0 | 73 { |
74 SDL_AudioDevice *this; | |
75 | |
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)); |
0 | 80 this->hidden = (struct SDL_PrivateAudioData *) |
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81 SDL_malloc ((sizeof *this->hidden)); |
0 | 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); |
0 | 87 } |
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88 return (0); |
0 | 89 } |
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90 SDL_memset (this->hidden, 0, (sizeof *this->hidden)); |
0 | 91 |
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; |
0 | 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 |
0 | 103 return this; |
104 } | |
105 | |
106 AudioBootStrap SNDMGR_bootstrap = { | |
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107 "sndmgr", "MacOS SoundManager 3.0", |
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108 Audio_Available, Audio_CreateDevice |
0 | 109 }; |
110 | |
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111 #if defined(TARGET_API_MAC_CARBON) || defined(USE_RYANS_SOUNDCODE) |
1621 | 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; |
0 | 118 |
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119 static UInt8 *buffer[2]; |
0 | 120 static volatile UInt32 running = 0; |
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); |
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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); |
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143 } |
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144 #ifdef __MACOSX__ |
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145 SDL_mutexV (audio->mixer_lock); |
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146 #endif |
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147 } |
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148 |
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149 DecrementAtomic ((SInt32 *) & need_to_mix); |
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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) |
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154 { |
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155 IncrementAtomic ((SInt32 *) & audio_is_locked); |
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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) |
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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. */ |
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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)) { |
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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]); |
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175 } |
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176 } |
0 | 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; |
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184 |
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185 IncrementAtomic ((SInt32 *) & need_to_mix); |
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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 } |
0 | 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); |
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200 |
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201 memset (buffer[fill_me], 0, audio->spec.size); |
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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 } |
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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 } |
0 | 219 } |
220 | |
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221 static int |
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222 Mac_OpenAudio (_THIS, SDL_AudioSpec * spec) |
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223 { |
0 | 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... */ |
0 | 231 switch (spec->format) { |
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232 case AUDIO_S8: |
0 | 233 spec->format = AUDIO_U8; |
234 break; | |
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235 case AUDIO_U16LSB: |
0 | 236 spec->format = AUDIO_S16LSB; |
237 break; | |
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238 case AUDIO_U16MSB: |
0 | 239 spec->format = AUDIO_S16MSB; |
240 break; | |
241 } | |
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242 SDL_CalculateAudioSpec (spec); |
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243 |
0 | 244 /* initialize bufferCmd header */ |
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245 memset (&header, 0, sizeof (header)); |
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246 callback = (SndCallBackUPP) NewSndCallBackUPP (callBackProc); |
0 | 247 sample_bits = spec->size / spec->samples / spec->channels * 8; |
248 | |
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); |
0 | 253 #endif /* DEBUG_AUDIO */ |
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254 |
0 | 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 |
0 | 261 /* Note that we install the 16bitLittleEndian Converter if needed. */ |
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262 if (spec->format == 0x8010) { |
0 | 263 header.compressionID = fixedCompression; |
264 header.format = k16BitLittleEndianFormat; | |
265 } | |
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266 |
0 | 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); |
0 | 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 | 284 initOptions = initStereo; |
285 } else { | |
286 initOptions = initMono; | |
287 } | |
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288 channel->userInfo = (long) this; |
0 | 289 channel->qLength = 128; |
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290 if (SndNewChannel (&channel, sampledSynth, initOptions, callback) != |
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291 noErr) { |
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292 SDL_SetError ("Unable to create audio channel"); |
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293 SDL_free (channel); |
0 | 294 channel = NULL; |
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295 return (-1); |
0 | 296 } |
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297 |
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298 /* start playback */ |
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299 { |
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300 SndCommand cmd; |
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301 cmd.cmd = callBackCmd; |
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302 cmd.param2 = 0; |
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303 running = 1; |
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304 SndDoCommand (channel, &cmd, 0); |
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305 } |
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306 |
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307 return 1; |
0 | 308 } |
309 | |
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310 static void |
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311 Mac_CloseAudio (_THIS) |
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312 { |
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313 |
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314 int i; |
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315 |
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316 running = 0; |
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317 |
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318 if (channel) { |
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319 SndDisposeChannel (channel, true); |
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320 channel = NULL; |
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321 } |
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322 |
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323 for (i = 0; i < 2; ++i) { |
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324 if (buffer[i]) { |
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325 SDL_free (buffer[i]); |
0 | 326 buffer[i] = NULL; |
327 } | |
328 } | |
329 } | |
330 | |
323
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331 #else /* !TARGET_API_MAC_CARBON && !USE_RYANS_SOUNDCODE */ |
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332 |
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333 static void |
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334 Mac_LockAudio (_THIS) |
323
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335 { |
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336 /* no-op. */ |
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337 } |
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338 |
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339 static void |
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340 Mac_UnlockAudio (_THIS) |
323
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341 { |
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342 /* no-op. */ |
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343 } |
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344 |
0 | 345 |
346 /* This function is called by Sound Manager when it has exhausted one of | |
347 the buffers, so we'll zero it to silence and fill it with audio if | |
348 we're not paused. | |
349 */ | |
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350 static pascal void |
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351 sndDoubleBackProc (SndChannelPtr chan, SndDoubleBufferPtr newbuf) |
0 | 352 { |
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353 SDL_AudioDevice *audio = (SDL_AudioDevice *) newbuf->dbUserInfo[0]; |
0 | 354 |
355 /* If audio is quitting, don't do anything */ | |
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356 if (!audio->enabled) { |
0 | 357 return; |
358 } | |
359 memset (newbuf->dbSoundData, 0, audio->spec.size); | |
360 newbuf->dbNumFrames = audio->spec.samples; | |
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361 if (!audio->paused) { |
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362 if (audio->convert.needed) { |
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363 audio->spec.callback (audio->spec.userdata, |
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364 (Uint8 *) audio->convert.buf, |
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365 audio->convert.len); |
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366 SDL_ConvertAudio (&audio->convert); |
0 | 367 #if 0 |
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368 if (audio->convert.len_cvt != audio->spec.size) { |
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369 /* Uh oh... probably crashes here */ ; |
0 | 370 } |
371 #endif | |
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372 SDL_memcpy (newbuf->dbSoundData, audio->convert.buf, |
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373 audio->convert.len_cvt); |
0 | 374 } else { |
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375 audio->spec.callback (audio->spec.userdata, |
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376 (Uint8 *) newbuf->dbSoundData, |
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377 audio->spec.size); |
0 | 378 } |
379 } | |
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380 newbuf->dbFlags |= dbBufferReady; |
0 | 381 } |
382 | |
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383 static int |
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384 DoubleBufferAudio_Available (void) |
0 | 385 { |
386 int available; | |
387 NumVersion sndversion; | |
388 long response; | |
389 | |
390 available = 0; | |
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391 sndversion = SndSoundManagerVersion (); |
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392 if (sndversion.majorRev >= 3) { |
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393 if (Gestalt (gestaltSoundAttr, &response) == noErr) { |
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394 if ((response & (1 << gestaltSndPlayDoubleBuffer))) { |
0 | 395 available = 1; |
396 } | |
397 } | |
398 } else { | |
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399 if (Gestalt (gestaltSoundAttr, &response) == noErr) { |
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400 if ((response & (1 << gestaltHasASC))) { |
0 | 401 available = 1; |
402 } | |
403 } | |
404 } | |
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405 return (available); |
0 | 406 } |
407 | |
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408 static void |
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409 Mac_CloseAudio (_THIS) |
0 | 410 { |
411 int i; | |
412 | |
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413 if (channel != NULL) { |
0 | 414 /* Clean up the audio channel */ |
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415 SndDisposeChannel (channel, true); |
0 | 416 channel = NULL; |
417 } | |
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418 for (i = 0; i < 2; ++i) { |
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419 if (audio_buf[i]) { |
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420 SDL_free (audio_buf[i]); |
0 | 421 audio_buf[i] = NULL; |
422 } | |
423 } | |
424 } | |
425 | |
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426 static int |
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427 Mac_OpenAudio (_THIS, SDL_AudioSpec * spec) |
0 | 428 { |
429 SndDoubleBufferHeader2 audio_dbh; | |
430 int i; | |
431 long initOptions; | |
432 int sample_bits; | |
433 SndDoubleBackUPP doubleBackProc; | |
434 | |
435 /* Check to make sure double-buffered audio is available */ | |
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436 if (!DoubleBufferAudio_Available ()) { |
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437 SDL_SetError ("Sound manager doesn't support double-buffering"); |
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438 return (-1); |
0 | 439 } |
440 | |
441 /* Very few conversions are required, but... */ | |
442 switch (spec->format) { | |
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443 case AUDIO_S8: |
0 | 444 spec->format = AUDIO_U8; |
445 break; | |
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446 case AUDIO_U16LSB: |
0 | 447 spec->format = AUDIO_S16LSB; |
448 break; | |
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449 case AUDIO_U16MSB: |
0 | 450 spec->format = AUDIO_S16MSB; |
451 break; | |
452 } | |
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453 SDL_CalculateAudioSpec (spec); |
0 | 454 |
455 /* initialize the double-back header */ | |
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456 SDL_memset (&audio_dbh, 0, sizeof (audio_dbh)); |
0 | 457 doubleBackProc = NewSndDoubleBackProc (sndDoubleBackProc); |
458 sample_bits = spec->size / spec->samples / spec->channels * 8; | |
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459 |
0 | 460 audio_dbh.dbhNumChannels = spec->channels; |
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461 audio_dbh.dbhSampleSize = sample_bits; |
0 | 462 audio_dbh.dbhCompressionID = 0; |
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463 audio_dbh.dbhPacketSize = 0; |
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464 audio_dbh.dbhSampleRate = spec->freq << 16; |
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465 audio_dbh.dbhDoubleBack = doubleBackProc; |
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466 audio_dbh.dbhFormat = 0; |
0 | 467 |
468 /* Note that we install the 16bitLittleEndian Converter if needed. */ | |
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469 if (spec->format == 0x8010) { |
0 | 470 audio_dbh.dbhCompressionID = fixedCompression; |
471 audio_dbh.dbhFormat = k16BitLittleEndianFormat; | |
472 } | |
473 | |
474 /* allocate the 2 double-back buffers */ | |
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475 for (i = 0; i < 2; ++i) { |
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476 audio_buf[i] = SDL_calloc (1, sizeof (SndDoubleBuffer) + spec->size); |
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477 if (audio_buf[i] == NULL) { |
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478 SDL_OutOfMemory (); |
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479 return (-1); |
0 | 480 } |
481 audio_buf[i]->dbNumFrames = spec->samples; | |
482 audio_buf[i]->dbFlags = dbBufferReady; | |
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483 audio_buf[i]->dbUserInfo[0] = (long) this; |
0 | 484 audio_dbh.dbhBufferPtr[i] = audio_buf[i]; |
485 } | |
486 | |
487 /* Create the sound manager channel */ | |
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488 channel = (SndChannelPtr) SDL_malloc (sizeof (*channel)); |
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489 if (channel == NULL) { |
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490 SDL_OutOfMemory (); |
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491 return (-1); |
0 | 492 } |
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493 if (spec->channels >= 2) { |
0 | 494 initOptions = initStereo; |
495 } else { | |
496 initOptions = initMono; | |
497 } | |
498 channel->userInfo = 0; | |
499 channel->qLength = 128; | |
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500 if (SndNewChannel (&channel, sampledSynth, initOptions, 0L) != noErr) { |
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501 SDL_SetError ("Unable to create audio channel"); |
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502 SDL_free (channel); |
0 | 503 channel = NULL; |
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504 return (-1); |
0 | 505 } |
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506 |
0 | 507 /* Start playback */ |
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508 if (SndPlayDoubleBuffer (channel, (SndDoubleBufferHeaderPtr) & audio_dbh) |
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509 != noErr) { |
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510 SDL_SetError ("Unable to play double buffered audio"); |
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511 return (-1); |
0 | 512 } |
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513 |
0 | 514 return 1; |
515 } | |
516 | |
323
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517 #endif /* TARGET_API_MAC_CARBON || USE_RYANS_SOUNDCODE */ |
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518 /* vi: set ts=4 sw=4 expandtab: */ |