Mercurial > sdl-ios-xcode
annotate src/audio/windib/SDL_dibaudio.c @ 1424:7a610f25c12f
Updated MacOS Classic MPW build
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 24 Feb 2006 09:57:14 +0000 |
| parents | d910939febfa |
| children | bb6839704ed6 |
| rev | line source |
|---|---|
| 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 |
| 24 /* Allow access to a raw mixing buffer */ | |
| 25 | |
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26 #include "SDL_windows.h" |
| 0 | 27 #include <mmsystem.h> |
| 28 | |
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29 #include "SDL_timer.h" |
| 0 | 30 #include "SDL_audio.h" |
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31 #include "../SDL_audio_c.h" |
| 0 | 32 #include "SDL_dibaudio.h" |
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33 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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34 #include "win_ce_semaphore.h" |
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35 #endif |
| 0 | 36 |
| 37 | |
| 38 /* Audio driver functions */ | |
| 39 static int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 40 static void DIB_ThreadInit(_THIS); | |
| 41 static void DIB_WaitAudio(_THIS); | |
| 42 static Uint8 *DIB_GetAudioBuf(_THIS); | |
| 43 static void DIB_PlayAudio(_THIS); | |
| 44 static void DIB_WaitDone(_THIS); | |
| 45 static void DIB_CloseAudio(_THIS); | |
| 46 | |
| 47 /* Audio driver bootstrap functions */ | |
| 48 | |
| 49 static int Audio_Available(void) | |
| 50 { | |
| 51 return(1); | |
| 52 } | |
| 53 | |
| 54 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 55 { | |
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56 SDL_free(device->hidden); |
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57 SDL_free(device); |
| 0 | 58 } |
| 59 | |
| 60 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 61 { | |
| 62 SDL_AudioDevice *this; | |
| 63 | |
| 64 /* Initialize all variables that we clean on shutdown */ | |
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65 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 66 if ( this ) { |
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67 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 68 this->hidden = (struct SDL_PrivateAudioData *) |
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69 SDL_malloc((sizeof *this->hidden)); |
| 0 | 70 } |
| 71 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 72 SDL_OutOfMemory(); | |
| 73 if ( this ) { | |
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74 SDL_free(this); |
| 0 | 75 } |
| 76 return(0); | |
| 77 } | |
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78 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 79 |
| 80 /* Set the function pointers */ | |
| 81 this->OpenAudio = DIB_OpenAudio; | |
| 82 this->ThreadInit = DIB_ThreadInit; | |
| 83 this->WaitAudio = DIB_WaitAudio; | |
| 84 this->PlayAudio = DIB_PlayAudio; | |
| 85 this->GetAudioBuf = DIB_GetAudioBuf; | |
| 86 this->WaitDone = DIB_WaitDone; | |
| 87 this->CloseAudio = DIB_CloseAudio; | |
| 88 | |
| 89 this->free = Audio_DeleteDevice; | |
| 90 | |
| 91 return this; | |
| 92 } | |
| 93 | |
| 94 AudioBootStrap WAVEOUT_bootstrap = { | |
| 95 "waveout", "Win95/98/NT/2000 WaveOut", | |
| 96 Audio_Available, Audio_CreateDevice | |
| 97 }; | |
| 98 | |
| 99 | |
| 100 /* The Win32 callback for filling the WAVE device */ | |
| 101 static void CALLBACK FillSound(HWAVEOUT hwo, UINT uMsg, DWORD dwInstance, | |
| 102 DWORD dwParam1, DWORD dwParam2) | |
| 103 { | |
| 104 SDL_AudioDevice *this = (SDL_AudioDevice *)dwInstance; | |
| 105 | |
| 106 /* Only service "buffer done playing" messages */ | |
| 107 if ( uMsg != WOM_DONE ) | |
| 108 return; | |
| 109 | |
| 110 /* Signal that we are done playing a buffer */ | |
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111 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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112 ReleaseSemaphoreCE(audio_sem, 1, NULL); |
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113 #else |
| 0 | 114 ReleaseSemaphore(audio_sem, 1, NULL); |
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115 #endif |
| 0 | 116 } |
| 117 | |
| 118 static void SetMMerror(char *function, MMRESULT code) | |
| 119 { | |
| 120 int len; | |
| 121 char errbuf[MAXERRORLENGTH]; | |
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122 #ifdef _WIN32_WCE |
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123 wchar_t werrbuf[MAXERRORLENGTH]; |
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124 #endif |
| 0 | 125 |
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126 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function); |
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127 len = SDL_strlen(errbuf); |
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128 |
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129 #ifdef _WIN32_WCE |
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130 /* UNICODE version */ |
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131 waveOutGetErrorText(code, werrbuf, MAXERRORLENGTH-len); |
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132 WideCharToMultiByte(CP_ACP,0,werrbuf,-1,errbuf+len,MAXERRORLENGTH-len,NULL,NULL); |
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133 #else |
| 0 | 134 waveOutGetErrorText(code, errbuf+len, MAXERRORLENGTH-len); |
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135 #endif |
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136 |
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137 SDL_SetError("%s",errbuf); |
| 0 | 138 } |
| 139 | |
| 140 /* Set high priority for the audio thread */ | |
| 141 static void DIB_ThreadInit(_THIS) | |
| 142 { | |
| 143 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); | |
| 144 } | |
| 145 | |
| 146 void DIB_WaitAudio(_THIS) | |
| 147 { | |
| 148 /* Wait for an audio chunk to finish */ | |
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149 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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150 WaitForSemaphoreCE(audio_sem, INFINITE); |
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151 #else |
| 0 | 152 WaitForSingleObject(audio_sem, INFINITE); |
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153 #endif |
| 0 | 154 } |
| 155 | |
| 156 Uint8 *DIB_GetAudioBuf(_THIS) | |
| 157 { | |
| 158 Uint8 *retval; | |
| 159 | |
| 160 retval = (Uint8 *)(wavebuf[next_buffer].lpData); | |
| 161 return retval; | |
| 162 } | |
| 163 | |
| 164 void DIB_PlayAudio(_THIS) | |
| 165 { | |
| 166 /* Queue it up */ | |
| 167 waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0])); | |
| 168 next_buffer = (next_buffer+1)%NUM_BUFFERS; | |
| 169 } | |
| 170 | |
| 171 void DIB_WaitDone(_THIS) | |
| 172 { | |
| 173 int i, left; | |
| 174 | |
| 175 do { | |
| 176 left = NUM_BUFFERS; | |
| 177 for ( i=0; i<NUM_BUFFERS; ++i ) { | |
| 178 if ( wavebuf[i].dwFlags & WHDR_DONE ) { | |
| 179 --left; | |
| 180 } | |
| 181 } | |
| 182 if ( left > 0 ) { | |
| 183 SDL_Delay(100); | |
| 184 } | |
| 185 } while ( left > 0 ); | |
| 186 } | |
| 187 | |
| 188 void DIB_CloseAudio(_THIS) | |
| 189 { | |
| 190 int i; | |
| 191 | |
| 192 /* Close up audio */ | |
| 193 if ( audio_sem ) { | |
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194 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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195 CloseSynchHandle(audio_sem); |
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196 #else |
| 0 | 197 CloseHandle(audio_sem); |
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198 #endif |
| 0 | 199 } |
| 200 if ( sound ) { | |
| 201 waveOutClose(sound); | |
| 202 } | |
| 203 | |
| 204 /* Clean up mixing buffers */ | |
| 205 for ( i=0; i<NUM_BUFFERS; ++i ) { | |
| 206 if ( wavebuf[i].dwUser != 0xFFFF ) { | |
| 207 waveOutUnprepareHeader(sound, &wavebuf[i], | |
| 208 sizeof(wavebuf[i])); | |
| 209 wavebuf[i].dwUser = 0xFFFF; | |
| 210 } | |
| 211 } | |
| 212 /* Free raw mixing buffer */ | |
| 213 if ( mixbuf != NULL ) { | |
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214 SDL_free(mixbuf); |
| 0 | 215 mixbuf = NULL; |
| 216 } | |
| 217 } | |
| 218 | |
| 219 int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 220 { | |
| 221 MMRESULT result; | |
| 222 int i; | |
| 223 WAVEFORMATEX waveformat; | |
| 224 | |
| 225 /* Initialize the wavebuf structures for closing */ | |
| 226 sound = NULL; | |
| 227 audio_sem = NULL; | |
| 228 for ( i = 0; i < NUM_BUFFERS; ++i ) | |
| 229 wavebuf[i].dwUser = 0xFFFF; | |
| 230 mixbuf = NULL; | |
| 231 | |
| 232 /* Set basic WAVE format parameters */ | |
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233 SDL_memset(&waveformat, 0, sizeof(waveformat)); |
| 0 | 234 waveformat.wFormatTag = WAVE_FORMAT_PCM; |
| 235 | |
| 236 /* Determine the audio parameters from the AudioSpec */ | |
| 237 switch ( spec->format & 0xFF ) { | |
| 238 case 8: | |
| 239 /* Unsigned 8 bit audio data */ | |
| 240 spec->format = AUDIO_U8; | |
| 241 waveformat.wBitsPerSample = 8; | |
| 242 break; | |
| 243 case 16: | |
| 244 /* Signed 16 bit audio data */ | |
| 245 spec->format = AUDIO_S16; | |
| 246 waveformat.wBitsPerSample = 16; | |
| 247 break; | |
| 248 default: | |
| 249 SDL_SetError("Unsupported audio format"); | |
| 250 return(-1); | |
| 251 } | |
| 252 waveformat.nChannels = spec->channels; | |
| 253 waveformat.nSamplesPerSec = spec->freq; | |
| 254 waveformat.nBlockAlign = | |
| 255 waveformat.nChannels * (waveformat.wBitsPerSample/8); | |
| 256 waveformat.nAvgBytesPerSec = | |
| 257 waveformat.nSamplesPerSec * waveformat.nBlockAlign; | |
| 258 | |
| 259 /* Check the buffer size -- minimum of 1/4 second (word aligned) */ | |
| 260 if ( spec->samples < (spec->freq/4) ) | |
| 261 spec->samples = ((spec->freq/4)+3)&~3; | |
| 262 | |
| 263 /* Update the fragment size as size in bytes */ | |
| 264 SDL_CalculateAudioSpec(spec); | |
| 265 | |
| 266 /* Open the audio device */ | |
| 267 result = waveOutOpen(&sound, WAVE_MAPPER, &waveformat, | |
| 268 (DWORD)FillSound, (DWORD)this, CALLBACK_FUNCTION); | |
| 269 if ( result != MMSYSERR_NOERROR ) { | |
| 270 SetMMerror("waveOutOpen()", result); | |
| 271 return(-1); | |
| 272 } | |
| 273 | |
| 274 #ifdef SOUND_DEBUG | |
| 275 /* Check the sound device we retrieved */ | |
| 276 { | |
| 277 WAVEOUTCAPS caps; | |
| 278 | |
| 279 result = waveOutGetDevCaps((UINT)sound, &caps, sizeof(caps)); | |
| 280 if ( result != MMSYSERR_NOERROR ) { | |
| 281 SetMMerror("waveOutGetDevCaps()", result); | |
| 282 return(-1); | |
| 283 } | |
| 284 printf("Audio device: %s\n", caps.szPname); | |
| 285 } | |
| 286 #endif | |
| 287 | |
| 288 /* Create the audio buffer semaphore */ | |
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289 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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290 audio_sem = CreateSemaphoreCE(NULL, NUM_BUFFERS-1, NUM_BUFFERS, NULL); |
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291 #else |
| 0 | 292 audio_sem = CreateSemaphore(NULL, NUM_BUFFERS-1, NUM_BUFFERS, NULL); |
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293 #endif |
| 0 | 294 if ( audio_sem == NULL ) { |
| 295 SDL_SetError("Couldn't create semaphore"); | |
| 296 return(-1); | |
| 297 } | |
| 298 | |
| 299 /* Create the sound buffers */ | |
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300 mixbuf = (Uint8 *)SDL_malloc(NUM_BUFFERS*spec->size); |
| 0 | 301 if ( mixbuf == NULL ) { |
| 302 SDL_SetError("Out of memory"); | |
| 303 return(-1); | |
| 304 } | |
| 305 for ( i = 0; i < NUM_BUFFERS; ++i ) { | |
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306 SDL_memset(&wavebuf[i], 0, sizeof(wavebuf[i])); |
| 0 | 307 wavebuf[i].lpData = (LPSTR) &mixbuf[i*spec->size]; |
| 308 wavebuf[i].dwBufferLength = spec->size; | |
| 309 wavebuf[i].dwFlags = WHDR_DONE; | |
| 310 result = waveOutPrepareHeader(sound, &wavebuf[i], | |
| 311 sizeof(wavebuf[i])); | |
| 312 if ( result != MMSYSERR_NOERROR ) { | |
| 313 SetMMerror("waveOutPrepareHeader()", result); | |
| 314 return(-1); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 /* Ready to go! */ | |
| 319 next_buffer = 0; | |
| 320 return(0); | |
| 321 } |