Mercurial > sdl-ios-xcode
annotate src/audio/windib/SDL_dibaudio.c @ 4165:3b8ac3d311a2 SDL-1.2
Hello.
This patch provides basic support for video on the Sony PS3
Linux framebuffer. Scaling, format-conversion, and drawing is
done from the SPEs, so there is little performance impact to
PPE applications. This is by no means production quality code,
but it is a very good start and a good example of how to use the
PS3's hardware capabilities to accelerate video playback on
the box.
The driver has been verified to work with ffplay, mplayer and xine.
This piece of software has been developed at the IBM R&D Lab
in Boeblingen, Germany and is now returned to the community.
Enjoy !
Signed-off-by: D.Herrendoerfer < d.herrendoerfer [at] de [dot] ibm [dot] com >
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 02 Apr 2009 04:06:55 +0000 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 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 #define WIN32_LEAN_AND_MEAN |
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27 #include <windows.h> |
| 0 | 28 #include <mmsystem.h> |
| 29 | |
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30 #include "SDL_timer.h" |
| 0 | 31 #include "SDL_audio.h" |
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32 #include "../SDL_audio_c.h" |
| 0 | 33 #include "SDL_dibaudio.h" |
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34 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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35 #include "win_ce_semaphore.h" |
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36 #endif |
| 0 | 37 |
| 38 | |
| 39 /* Audio driver functions */ | |
| 40 static int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 41 static void DIB_ThreadInit(_THIS); | |
| 42 static void DIB_WaitAudio(_THIS); | |
| 43 static Uint8 *DIB_GetAudioBuf(_THIS); | |
| 44 static void DIB_PlayAudio(_THIS); | |
| 45 static void DIB_WaitDone(_THIS); | |
| 46 static void DIB_CloseAudio(_THIS); | |
| 47 | |
| 48 /* Audio driver bootstrap functions */ | |
| 49 | |
| 50 static int Audio_Available(void) | |
| 51 { | |
| 52 return(1); | |
| 53 } | |
| 54 | |
| 55 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 56 { | |
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57 SDL_free(device->hidden); |
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58 SDL_free(device); |
| 0 | 59 } |
| 60 | |
| 61 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 62 { | |
| 63 SDL_AudioDevice *this; | |
| 64 | |
| 65 /* Initialize all variables that we clean on shutdown */ | |
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66 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 67 if ( this ) { |
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68 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 69 this->hidden = (struct SDL_PrivateAudioData *) |
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70 SDL_malloc((sizeof *this->hidden)); |
| 0 | 71 } |
| 72 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 73 SDL_OutOfMemory(); | |
| 74 if ( this ) { | |
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75 SDL_free(this); |
| 0 | 76 } |
| 77 return(0); | |
| 78 } | |
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79 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 80 |
| 81 /* Set the function pointers */ | |
| 82 this->OpenAudio = DIB_OpenAudio; | |
| 83 this->ThreadInit = DIB_ThreadInit; | |
| 84 this->WaitAudio = DIB_WaitAudio; | |
| 85 this->PlayAudio = DIB_PlayAudio; | |
| 86 this->GetAudioBuf = DIB_GetAudioBuf; | |
| 87 this->WaitDone = DIB_WaitDone; | |
| 88 this->CloseAudio = DIB_CloseAudio; | |
| 89 | |
| 90 this->free = Audio_DeleteDevice; | |
| 91 | |
| 92 return this; | |
| 93 } | |
| 94 | |
| 95 AudioBootStrap WAVEOUT_bootstrap = { | |
| 96 "waveout", "Win95/98/NT/2000 WaveOut", | |
| 97 Audio_Available, Audio_CreateDevice | |
| 98 }; | |
| 99 | |
| 100 | |
| 101 /* The Win32 callback for filling the WAVE device */ | |
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102 static void CALLBACK FillSound(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, |
| 0 | 103 DWORD dwParam1, DWORD dwParam2) |
| 104 { | |
| 105 SDL_AudioDevice *this = (SDL_AudioDevice *)dwInstance; | |
| 106 | |
| 107 /* Only service "buffer done playing" messages */ | |
| 108 if ( uMsg != WOM_DONE ) | |
| 109 return; | |
| 110 | |
| 111 /* Signal that we are done playing a buffer */ | |
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112 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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113 ReleaseSemaphoreCE(audio_sem, 1, NULL); |
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114 #else |
| 0 | 115 ReleaseSemaphore(audio_sem, 1, NULL); |
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116 #endif |
| 0 | 117 } |
| 118 | |
| 119 static void SetMMerror(char *function, MMRESULT code) | |
| 120 { | |
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121 size_t len; |
| 0 | 122 char errbuf[MAXERRORLENGTH]; |
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123 #ifdef _WIN32_WCE |
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124 wchar_t werrbuf[MAXERRORLENGTH]; |
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125 #endif |
| 0 | 126 |
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127 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function); |
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128 len = SDL_strlen(errbuf); |
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129 |
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130 #ifdef _WIN32_WCE |
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131 /* UNICODE version */ |
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132 waveOutGetErrorText(code, werrbuf, MAXERRORLENGTH-len); |
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133 WideCharToMultiByte(CP_ACP,0,werrbuf,-1,errbuf+len,MAXERRORLENGTH-len,NULL,NULL); |
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134 #else |
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135 waveOutGetErrorText(code, errbuf+len, (UINT)(MAXERRORLENGTH-len)); |
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136 #endif |
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137 |
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138 SDL_SetError("%s",errbuf); |
| 0 | 139 } |
| 140 | |
| 141 /* Set high priority for the audio thread */ | |
| 142 static void DIB_ThreadInit(_THIS) | |
| 143 { | |
| 144 SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST); | |
| 145 } | |
| 146 | |
| 147 void DIB_WaitAudio(_THIS) | |
| 148 { | |
| 149 /* Wait for an audio chunk to finish */ | |
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150 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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151 WaitForSemaphoreCE(audio_sem, INFINITE); |
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152 #else |
| 0 | 153 WaitForSingleObject(audio_sem, INFINITE); |
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154 #endif |
| 0 | 155 } |
| 156 | |
| 157 Uint8 *DIB_GetAudioBuf(_THIS) | |
| 158 { | |
| 159 Uint8 *retval; | |
| 160 | |
| 161 retval = (Uint8 *)(wavebuf[next_buffer].lpData); | |
| 162 return retval; | |
| 163 } | |
| 164 | |
| 165 void DIB_PlayAudio(_THIS) | |
| 166 { | |
| 167 /* Queue it up */ | |
| 168 waveOutWrite(sound, &wavebuf[next_buffer], sizeof(wavebuf[0])); | |
| 169 next_buffer = (next_buffer+1)%NUM_BUFFERS; | |
| 170 } | |
| 171 | |
| 172 void DIB_WaitDone(_THIS) | |
| 173 { | |
| 174 int i, left; | |
| 175 | |
| 176 do { | |
| 177 left = NUM_BUFFERS; | |
| 178 for ( i=0; i<NUM_BUFFERS; ++i ) { | |
| 179 if ( wavebuf[i].dwFlags & WHDR_DONE ) { | |
| 180 --left; | |
| 181 } | |
| 182 } | |
| 183 if ( left > 0 ) { | |
| 184 SDL_Delay(100); | |
| 185 } | |
| 186 } while ( left > 0 ); | |
| 187 } | |
| 188 | |
| 189 void DIB_CloseAudio(_THIS) | |
| 190 { | |
| 191 int i; | |
| 192 | |
| 193 /* Close up audio */ | |
| 194 if ( audio_sem ) { | |
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195 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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196 CloseSynchHandle(audio_sem); |
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197 #else |
| 0 | 198 CloseHandle(audio_sem); |
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199 #endif |
| 0 | 200 } |
| 201 if ( sound ) { | |
| 202 waveOutClose(sound); | |
| 203 } | |
| 204 | |
| 205 /* Clean up mixing buffers */ | |
| 206 for ( i=0; i<NUM_BUFFERS; ++i ) { | |
| 207 if ( wavebuf[i].dwUser != 0xFFFF ) { | |
| 208 waveOutUnprepareHeader(sound, &wavebuf[i], | |
| 209 sizeof(wavebuf[i])); | |
| 210 wavebuf[i].dwUser = 0xFFFF; | |
| 211 } | |
| 212 } | |
| 213 /* Free raw mixing buffer */ | |
| 214 if ( mixbuf != NULL ) { | |
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215 SDL_free(mixbuf); |
| 0 | 216 mixbuf = NULL; |
| 217 } | |
| 218 } | |
| 219 | |
| 220 int DIB_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 221 { | |
| 222 MMRESULT result; | |
| 223 int i; | |
| 224 WAVEFORMATEX waveformat; | |
| 225 | |
| 226 /* Initialize the wavebuf structures for closing */ | |
| 227 sound = NULL; | |
| 228 audio_sem = NULL; | |
| 229 for ( i = 0; i < NUM_BUFFERS; ++i ) | |
| 230 wavebuf[i].dwUser = 0xFFFF; | |
| 231 mixbuf = NULL; | |
| 232 | |
| 233 /* Set basic WAVE format parameters */ | |
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234 SDL_memset(&waveformat, 0, sizeof(waveformat)); |
| 0 | 235 waveformat.wFormatTag = WAVE_FORMAT_PCM; |
| 236 | |
| 237 /* Determine the audio parameters from the AudioSpec */ | |
| 238 switch ( spec->format & 0xFF ) { | |
| 239 case 8: | |
| 240 /* Unsigned 8 bit audio data */ | |
| 241 spec->format = AUDIO_U8; | |
| 242 waveformat.wBitsPerSample = 8; | |
| 243 break; | |
| 244 case 16: | |
| 245 /* Signed 16 bit audio data */ | |
| 246 spec->format = AUDIO_S16; | |
| 247 waveformat.wBitsPerSample = 16; | |
| 248 break; | |
| 249 default: | |
| 250 SDL_SetError("Unsupported audio format"); | |
| 251 return(-1); | |
| 252 } | |
| 253 waveformat.nChannels = spec->channels; | |
| 254 waveformat.nSamplesPerSec = spec->freq; | |
| 255 waveformat.nBlockAlign = | |
| 256 waveformat.nChannels * (waveformat.wBitsPerSample/8); | |
| 257 waveformat.nAvgBytesPerSec = | |
| 258 waveformat.nSamplesPerSec * waveformat.nBlockAlign; | |
| 259 | |
| 260 /* Check the buffer size -- minimum of 1/4 second (word aligned) */ | |
| 261 if ( spec->samples < (spec->freq/4) ) | |
| 262 spec->samples = ((spec->freq/4)+3)&~3; | |
| 263 | |
| 264 /* Update the fragment size as size in bytes */ | |
| 265 SDL_CalculateAudioSpec(spec); | |
| 266 | |
| 267 /* Open the audio device */ | |
| 268 result = waveOutOpen(&sound, WAVE_MAPPER, &waveformat, | |
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269 (DWORD_PTR)FillSound, (DWORD_PTR)this, CALLBACK_FUNCTION); |
| 0 | 270 if ( result != MMSYSERR_NOERROR ) { |
| 271 SetMMerror("waveOutOpen()", result); | |
| 272 return(-1); | |
| 273 } | |
| 274 | |
| 275 #ifdef SOUND_DEBUG | |
| 276 /* Check the sound device we retrieved */ | |
| 277 { | |
| 278 WAVEOUTCAPS caps; | |
| 279 | |
| 280 result = waveOutGetDevCaps((UINT)sound, &caps, sizeof(caps)); | |
| 281 if ( result != MMSYSERR_NOERROR ) { | |
| 282 SetMMerror("waveOutGetDevCaps()", result); | |
| 283 return(-1); | |
| 284 } | |
| 285 printf("Audio device: %s\n", caps.szPname); | |
| 286 } | |
| 287 #endif | |
| 288 | |
| 289 /* Create the audio buffer semaphore */ | |
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290 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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291 audio_sem = CreateSemaphoreCE(NULL, NUM_BUFFERS-1, NUM_BUFFERS, NULL); |
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292 #else |
| 0 | 293 audio_sem = CreateSemaphore(NULL, NUM_BUFFERS-1, NUM_BUFFERS, NULL); |
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294 #endif |
| 0 | 295 if ( audio_sem == NULL ) { |
| 296 SDL_SetError("Couldn't create semaphore"); | |
| 297 return(-1); | |
| 298 } | |
| 299 | |
| 300 /* Create the sound buffers */ | |
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301 mixbuf = (Uint8 *)SDL_malloc(NUM_BUFFERS*spec->size); |
| 0 | 302 if ( mixbuf == NULL ) { |
| 303 SDL_SetError("Out of memory"); | |
| 304 return(-1); | |
| 305 } | |
| 306 for ( i = 0; i < NUM_BUFFERS; ++i ) { | |
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307 SDL_memset(&wavebuf[i], 0, sizeof(wavebuf[i])); |
| 0 | 308 wavebuf[i].lpData = (LPSTR) &mixbuf[i*spec->size]; |
| 309 wavebuf[i].dwBufferLength = spec->size; | |
| 310 wavebuf[i].dwFlags = WHDR_DONE; | |
| 311 result = waveOutPrepareHeader(sound, &wavebuf[i], | |
| 312 sizeof(wavebuf[i])); | |
| 313 if ( result != MMSYSERR_NOERROR ) { | |
| 314 SetMMerror("waveOutPrepareHeader()", result); | |
| 315 return(-1); | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 /* Ready to go! */ | |
| 320 next_buffer = 0; | |
| 321 return(0); | |
| 322 } |