Mercurial > sdl-ios-xcode
annotate src/audio/ums/SDL_umsaudio.c @ 1361:19418e4422cb
New configure-based build system. Still work in progress, but much improved
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 16 Feb 2006 10:11:48 +0000 |
| parents | c71e05b4dc2e |
| children | d910939febfa |
| rev | line source |
|---|---|
| 0 | 1 /* |
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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 Carsten Griwodz | |
| 20 griff@kom.tu-darmstadt.de | |
| 21 | |
| 22 based on linux/SDL_dspaudio.c by Sam Lantinga | |
| 23 */ | |
| 24 | |
| 25 /* Allow access to a raw mixing buffer */ | |
| 26 | |
| 27 #include <errno.h> | |
| 28 #include <unistd.h> | |
| 29 #include <fcntl.h> | |
| 30 #include <sys/types.h> | |
| 31 #include <sys/time.h> | |
| 32 #include <sys/ioctl.h> | |
| 33 #include <sys/stat.h> | |
| 34 #include <sys/mman.h> | |
| 35 | |
| 36 #include "SDL_audio.h" | |
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37 #include "../SDL_audio_c.h" |
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38 #include "../SDL_audiodev_c.h" |
| 0 | 39 #include "SDL_umsaudio.h" |
| 40 | |
| 41 /* The tag name used by UMS audio */ | |
| 42 #define UMS_DRIVER_NAME "ums" | |
| 43 | |
| 44 #define DEBUG_AUDIO 1 | |
| 45 | |
| 46 /* Audio driver functions */ | |
| 47 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 48 static void UMS_PlayAudio(_THIS); | |
| 49 static Uint8 *UMS_GetAudioBuf(_THIS); | |
| 50 static void UMS_CloseAudio(_THIS); | |
| 51 | |
| 52 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags); | |
| 53 static UMSAudioDevice_ReturnCode UADClose(_THIS); | |
| 54 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits); | |
| 55 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits); | |
| 56 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate); | |
| 57 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order); | |
| 58 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt); | |
| 59 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt); | |
| 60 static UMSAudioDevice_ReturnCode UADInitialize(_THIS); | |
| 61 static UMSAudioDevice_ReturnCode UADStart(_THIS); | |
| 62 static UMSAudioDevice_ReturnCode UADStop(_THIS); | |
| 63 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt ); | |
| 64 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size ); | |
| 65 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size ); | |
| 66 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size ); | |
| 67 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret ); | |
| 68 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume ); | |
| 69 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance ); | |
| 70 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels ); | |
| 71 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block ); | |
| 72 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain); | |
| 73 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, long samples, long* samples_written); | |
| 74 | |
| 75 /* Audio driver bootstrap functions */ | |
| 76 static int Audio_Available(void) | |
| 77 { | |
| 78 return 1; | |
| 79 } | |
| 80 | |
| 81 static void Audio_DeleteDevice(_THIS) | |
| 82 { | |
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83 if(this->hidden->playbuf._buffer) SDL_free(this->hidden->playbuf._buffer); |
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84 if(this->hidden->fillbuf._buffer) SDL_free(this->hidden->fillbuf._buffer); |
| 0 | 85 _somFree( this->hidden->umsdev ); |
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86 SDL_free(this->hidden); |
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87 SDL_free(this); |
| 0 | 88 } |
| 89 | |
| 90 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 91 { | |
| 92 SDL_AudioDevice *this; | |
| 93 | |
| 94 /* | |
| 95 * Allocate and initialize management storage and private management | |
| 96 * storage for this SDL-using library. | |
| 97 */ | |
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98 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 99 if ( this ) { |
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100 SDL_memset(this, 0, (sizeof *this)); |
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101 this->hidden = (struct SDL_PrivateAudioData *)SDL_malloc((sizeof *this->hidden)); |
| 0 | 102 } |
| 103 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 104 SDL_OutOfMemory(); | |
| 105 if ( this ) { | |
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106 SDL_free(this); |
| 0 | 107 } |
| 108 return(0); | |
| 109 } | |
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110 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 111 #ifdef DEBUG_AUDIO |
| 112 fprintf(stderr, "Creating UMS Audio device\n"); | |
| 113 #endif | |
| 114 | |
| 115 /* | |
| 116 * Calls for UMS env initialization and audio object construction. | |
| 117 */ | |
| 118 this->hidden->ev = somGetGlobalEnvironment(); | |
| 119 this->hidden->umsdev = UMSAudioDeviceNew(); | |
| 120 | |
| 121 /* | |
| 122 * Set the function pointers. | |
| 123 */ | |
| 124 this->OpenAudio = UMS_OpenAudio; | |
| 125 this->WaitAudio = NULL; /* we do blocking output */ | |
| 126 this->PlayAudio = UMS_PlayAudio; | |
| 127 this->GetAudioBuf = UMS_GetAudioBuf; | |
| 128 this->CloseAudio = UMS_CloseAudio; | |
| 129 this->free = Audio_DeleteDevice; | |
| 130 | |
| 131 #ifdef DEBUG_AUDIO | |
| 132 fprintf(stderr, "done\n"); | |
| 133 #endif | |
| 134 return this; | |
| 135 } | |
| 136 | |
| 137 AudioBootStrap UMS_bootstrap = { | |
| 138 UMS_DRIVER_NAME, "AUX UMS audio", | |
| 139 Audio_Available, Audio_CreateDevice | |
| 140 }; | |
| 141 | |
| 142 static Uint8 *UMS_GetAudioBuf(_THIS) | |
| 143 { | |
| 144 #ifdef DEBUG_AUDIO | |
| 145 fprintf(stderr, "enter UMS_GetAudioBuf\n"); | |
| 146 #endif | |
| 147 return this->hidden->fillbuf._buffer; | |
| 148 /* | |
| 149 long bufSize; | |
| 150 UMSAudioDevice_ReturnCode rc; | |
| 151 | |
| 152 rc = UADSetTimeFormat(this, UMSAudioTypes_Bytes ); | |
| 153 rc = UADWriteBuffSize(this, bufSize ); | |
| 154 */ | |
| 155 } | |
| 156 | |
| 157 static void UMS_CloseAudio(_THIS) | |
| 158 { | |
| 159 UMSAudioDevice_ReturnCode rc; | |
| 160 | |
| 161 #ifdef DEBUG_AUDIO | |
| 162 fprintf(stderr, "enter UMS_CloseAudio\n"); | |
| 163 #endif | |
| 164 rc = UADPlayRemainingData(this, TRUE); | |
| 165 rc = UADStop(this); | |
| 166 rc = UADClose(this); | |
| 167 } | |
| 168 | |
| 169 static void UMS_PlayAudio(_THIS) | |
| 170 { | |
| 171 UMSAudioDevice_ReturnCode rc; | |
| 172 long samplesToWrite; | |
| 173 long samplesWritten; | |
| 174 UMSAudioTypes_Buffer swpbuf; | |
| 175 | |
| 176 #ifdef DEBUG_AUDIO | |
| 177 fprintf(stderr, "enter UMS_PlayAudio\n"); | |
| 178 #endif | |
| 179 samplesToWrite = this->hidden->playbuf._length/this->hidden->bytesPerSample; | |
| 180 do | |
| 181 { | |
| 182 rc = UADWrite(this, &this->hidden->playbuf, | |
| 183 samplesToWrite, | |
| 184 &samplesWritten ); | |
| 185 samplesToWrite -= samplesWritten; | |
| 186 | |
| 187 /* rc values: UMSAudioDevice_Success | |
| 188 * UMSAudioDevice_Failure | |
| 189 * UMSAudioDevice_Preempted | |
| 190 * UMSAudioDevice_Interrupted | |
| 191 * UMSAudioDevice_DeviceError | |
| 192 */ | |
| 193 if ( rc == UMSAudioDevice_DeviceError ) { | |
| 194 #ifdef DEBUG_AUDIO | |
| 195 fprintf(stderr, "Returning from PlayAudio with devices error\n"); | |
| 196 #endif | |
| 197 return; | |
| 198 } | |
| 199 } | |
| 200 while(samplesToWrite>0); | |
| 201 | |
| 202 SDL_LockAudio(); | |
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203 SDL_memcpy( &swpbuf, &this->hidden->playbuf, sizeof(UMSAudioTypes_Buffer) ); |
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204 SDL_memcpy( &this->hidden->playbuf, &this->hidden->fillbuf, sizeof(UMSAudioTypes_Buffer) ); |
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205 SDL_memcpy( &this->hidden->fillbuf, &swpbuf, sizeof(UMSAudioTypes_Buffer) ); |
| 0 | 206 SDL_UnlockAudio(); |
| 207 | |
| 208 #ifdef DEBUG_AUDIO | |
| 209 fprintf(stderr, "Wrote audio data and swapped buffer\n"); | |
| 210 #endif | |
| 211 } | |
| 212 | |
| 213 #if 0 | |
| 214 // /* Set the DSP frequency */ | |
| 215 // value = spec->freq; | |
| 216 // if ( ioctl(this->hidden->audio_fd, SOUND_PCM_WRITE_RATE, &value) < 0 ) { | |
| 217 // SDL_SetError("Couldn't set audio frequency"); | |
| 218 // return(-1); | |
| 219 // } | |
| 220 // spec->freq = value; | |
| 221 #endif | |
| 222 | |
| 223 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 224 { | |
| 225 char* audiodev = "/dev/paud0"; | |
| 226 long lgain; | |
| 227 long rgain; | |
| 228 long outRate; | |
| 229 long outBufSize; | |
| 230 long bitsPerSample; | |
| 231 long samplesPerSec; | |
| 232 long success; | |
| 233 Uint16 test_format; | |
| 234 int frag_spec; | |
| 235 UMSAudioDevice_ReturnCode rc; | |
| 236 | |
| 237 #ifdef DEBUG_AUDIO | |
| 238 fprintf(stderr, "enter UMS_OpenAudio\n"); | |
| 239 #endif | |
| 240 rc = UADOpen(this, audiodev,"PLAY", UMSAudioDevice_BlockingIO); | |
| 241 if ( rc != UMSAudioDevice_Success ) { | |
| 242 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); | |
| 243 return -1; | |
| 244 } | |
| 245 | |
| 246 rc = UADSetAudioFormatType(this, "PCM"); | |
| 247 | |
| 248 success = 0; | |
| 249 test_format = SDL_FirstAudioFormat(spec->format); | |
| 250 do | |
| 251 { | |
| 252 #ifdef DEBUG_AUDIO | |
| 253 fprintf(stderr, "Trying format 0x%4.4x\n", test_format); | |
| 254 #endif | |
| 255 switch ( test_format ) | |
| 256 { | |
| 257 case AUDIO_U8: | |
| 258 /* from the mac code: better ? */ | |
| 259 /* sample_bits = spec->size / spec->samples / spec->channels * 8; */ | |
| 260 success = 1; | |
| 261 bitsPerSample = 8; | |
| 262 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 263 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */ | |
| 264 rc = UADSetNumberFormat(this, "UNSIGNED"); | |
| 265 break; | |
| 266 case AUDIO_S8: | |
| 267 success = 1; | |
| 268 bitsPerSample = 8; | |
| 269 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 270 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */ | |
| 271 rc = UADSetNumberFormat(this, "SIGNED"); | |
| 272 break; | |
| 273 case AUDIO_S16LSB: | |
| 274 success = 1; | |
| 275 bitsPerSample = 16; | |
| 276 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 277 rc = UADSetByteOrder(this, "LSB"); | |
| 278 rc = UADSetNumberFormat(this, "SIGNED"); | |
| 279 break; | |
| 280 case AUDIO_S16MSB: | |
| 281 success = 1; | |
| 282 bitsPerSample = 16; | |
| 283 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 284 rc = UADSetByteOrder(this, "MSB"); | |
| 285 rc = UADSetNumberFormat(this, "SIGNED"); | |
| 286 break; | |
| 287 case AUDIO_U16LSB: | |
| 288 success = 1; | |
| 289 bitsPerSample = 16; | |
| 290 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 291 rc = UADSetByteOrder(this, "LSB"); | |
| 292 rc = UADSetNumberFormat(this, "UNSIGNED"); | |
| 293 break; | |
| 294 case AUDIO_U16MSB: | |
| 295 success = 1; | |
| 296 bitsPerSample = 16; | |
| 297 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 298 rc = UADSetByteOrder(this, "MSB"); | |
| 299 rc = UADSetNumberFormat(this, "UNSIGNED"); | |
| 300 break; | |
| 301 default: | |
| 302 break; | |
| 303 } | |
| 304 if ( ! success ) { | |
| 305 test_format = SDL_NextAudioFormat(); | |
| 306 } | |
| 307 } | |
| 308 while ( ! success && test_format ); | |
| 309 | |
| 310 if ( success == 0 ) { | |
| 311 SDL_SetError("Couldn't find any hardware audio formats"); | |
| 312 return -1; | |
| 313 } | |
| 314 | |
| 315 spec->format = test_format; | |
| 316 | |
| 317 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); | |
| 318 if ( (0x01<<frag_spec) != spec->size ) { | |
| 319 SDL_SetError("Fragment size must be a power of two"); | |
| 320 return -1; | |
| 321 } | |
| 322 if ( frag_spec > 2048 ) frag_spec = 2048; | |
| 323 | |
| 324 this->hidden->bytesPerSample = (bitsPerSample / 8) * spec->channels; | |
| 325 samplesPerSec = this->hidden->bytesPerSample * outRate; | |
| 326 | |
| 327 this->hidden->playbuf._length = 0; | |
| 328 this->hidden->playbuf._maximum = spec->size; | |
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329 this->hidden->playbuf._buffer = (unsigned char*)SDL_malloc(spec->size); |
| 0 | 330 this->hidden->fillbuf._length = 0; |
| 331 this->hidden->fillbuf._maximum = spec->size; | |
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332 this->hidden->fillbuf._buffer = (unsigned char*)SDL_malloc(spec->size); |
| 0 | 333 |
| 334 rc = UADSetBitsPerSample(this, bitsPerSample ); | |
| 335 rc = UADSetDMABufferSize(this, frag_spec, &outBufSize ); | |
| 336 rc = UADSetChannels(this, spec->channels); /* functions reduces to mono or stereo */ | |
| 337 | |
| 338 lgain = 100; /*maximum left input gain*/ | |
| 339 rgain = 100; /*maimum right input gain*/ | |
| 340 rc = UADEnableOutput(this, "LINE_OUT",&lgain,&rgain); | |
| 341 rc = UADInitialize(this); | |
| 342 rc = UADStart(this); | |
| 343 rc = UADSetVolume(this, 100); | |
| 344 rc = UADSetBalance(this, 0); | |
| 345 | |
| 346 /* We're ready to rock and roll. :-) */ | |
| 347 return 0; | |
| 348 } | |
| 349 | |
| 350 | |
| 351 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits) | |
| 352 { | |
| 353 return UMSAudioDevice_get_bits_per_sample( this->hidden->umsdev, | |
| 354 this->hidden->ev, | |
| 355 bits ); | |
| 356 } | |
| 357 | |
| 358 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits) | |
| 359 { | |
| 360 return UMSAudioDevice_set_bits_per_sample( this->hidden->umsdev, | |
| 361 this->hidden->ev, | |
| 362 bits ); | |
| 363 } | |
| 364 | |
| 365 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate) | |
| 366 { | |
| 367 /* from the mac code: sample rate = spec->freq << 16; */ | |
| 368 return UMSAudioDevice_set_sample_rate( this->hidden->umsdev, | |
| 369 this->hidden->ev, | |
| 370 rate, | |
| 371 set_rate ); | |
| 372 } | |
| 373 | |
| 374 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order) | |
| 375 { | |
| 376 return UMSAudioDevice_set_byte_order( this->hidden->umsdev, | |
| 377 this->hidden->ev, | |
| 378 byte_order ); | |
| 379 } | |
| 380 | |
| 381 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt) | |
| 382 { | |
| 383 /* possible PCM, A_LAW or MU_LAW */ | |
| 384 return UMSAudioDevice_set_audio_format_type( this->hidden->umsdev, | |
| 385 this->hidden->ev, | |
| 386 fmt ); | |
| 387 } | |
| 388 | |
| 389 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt) | |
| 390 { | |
| 391 /* possible SIGNED, UNSIGNED, or TWOS_COMPLEMENT */ | |
| 392 return UMSAudioDevice_set_number_format( this->hidden->umsdev, | |
| 393 this->hidden->ev, | |
| 394 fmt ); | |
| 395 } | |
| 396 | |
| 397 static UMSAudioDevice_ReturnCode UADInitialize(_THIS) | |
| 398 { | |
| 399 return UMSAudioDevice_initialize( this->hidden->umsdev, | |
| 400 this->hidden->ev ); | |
| 401 } | |
| 402 | |
| 403 static UMSAudioDevice_ReturnCode UADStart(_THIS) | |
| 404 { | |
| 405 return UMSAudioDevice_start( this->hidden->umsdev, | |
| 406 this->hidden->ev ); | |
| 407 } | |
| 408 | |
| 409 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt ) | |
| 410 { | |
| 411 /* | |
| 412 * Switches the time format to the new format, immediately. | |
| 413 * possible UMSAudioTypes_Msecs, UMSAudioTypes_Bytes or UMSAudioTypes_Samples | |
| 414 */ | |
| 415 return UMSAudioDevice_set_time_format( this->hidden->umsdev, | |
| 416 this->hidden->ev, | |
| 417 fmt ); | |
| 418 } | |
| 419 | |
| 420 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size ) | |
| 421 { | |
| 422 /* | |
| 423 * returns write buffer size in the current time format | |
| 424 */ | |
| 425 return UMSAudioDevice_write_buff_size( this->hidden->umsdev, | |
| 426 this->hidden->ev, | |
| 427 buff_size ); | |
| 428 } | |
| 429 | |
| 430 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size ) | |
| 431 { | |
| 432 /* | |
| 433 * returns amount of available space in the write buffer | |
| 434 * in the current time format | |
| 435 */ | |
| 436 return UMSAudioDevice_write_buff_remain( this->hidden->umsdev, | |
| 437 this->hidden->ev, | |
| 438 buff_size ); | |
| 439 } | |
| 440 | |
| 441 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size ) | |
| 442 { | |
| 443 /* | |
| 444 * returns amount of filled space in the write buffer | |
| 445 * in the current time format | |
| 446 */ | |
| 447 return UMSAudioDevice_write_buff_used( this->hidden->umsdev, | |
| 448 this->hidden->ev, | |
| 449 buff_size ); | |
| 450 } | |
| 451 | |
| 452 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret ) | |
| 453 { | |
| 454 /* | |
| 455 * Request a new DMA buffer size, maximum requested size 2048. | |
| 456 * Takes effect with next initialize() call. | |
| 457 * Devices may or may not support DMA. | |
| 458 */ | |
| 459 return UMSAudioDevice_set_DMA_buffer_size( this->hidden->umsdev, | |
| 460 this->hidden->ev, | |
| 461 bytes, | |
| 462 bytes_ret ); | |
| 463 } | |
| 464 | |
| 465 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume ) | |
| 466 { | |
| 467 /* | |
| 468 * Set the volume. | |
| 469 * Takes effect immediately. | |
| 470 */ | |
| 471 return UMSAudioDevice_set_volume( this->hidden->umsdev, | |
| 472 this->hidden->ev, | |
| 473 volume ); | |
| 474 } | |
| 475 | |
| 476 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance ) | |
| 477 { | |
| 478 /* | |
| 479 * Set the balance. | |
| 480 * Takes effect immediately. | |
| 481 */ | |
| 482 return UMSAudioDevice_set_balance( this->hidden->umsdev, | |
| 483 this->hidden->ev, | |
| 484 balance ); | |
| 485 } | |
| 486 | |
| 487 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels ) | |
| 488 { | |
| 489 /* | |
| 490 * Set mono or stereo. | |
| 491 * Takes effect with next initialize() call. | |
| 492 */ | |
| 493 if ( channels != 1 ) channels = 2; | |
| 494 return UMSAudioDevice_set_number_of_channels( this->hidden->umsdev, | |
| 495 this->hidden->ev, | |
| 496 channels ); | |
| 497 } | |
| 498 | |
| 499 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags) | |
| 500 { | |
| 501 return UMSAudioDevice_open( this->hidden->umsdev, | |
| 502 this->hidden->ev, | |
| 503 device, | |
| 504 mode, | |
| 505 flags ); | |
| 506 } | |
| 507 | |
| 508 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, | |
| 509 long samples, | |
| 510 long* samples_written) | |
| 511 { | |
| 512 return UMSAudioDevice_write( this->hidden->umsdev, | |
| 513 this->hidden->ev, | |
| 514 buff, | |
| 515 samples, | |
| 516 samples_written ); | |
| 517 } | |
| 518 | |
| 519 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block ) | |
| 520 { | |
| 521 return UMSAudioDevice_play_remaining_data( this->hidden->umsdev, | |
| 522 this->hidden->ev, | |
| 523 block); | |
| 524 } | |
| 525 | |
| 526 static UMSAudioDevice_ReturnCode UADStop(_THIS) | |
| 527 { | |
| 528 return UMSAudioDevice_stop( this->hidden->umsdev, | |
| 529 this->hidden->ev ); | |
| 530 } | |
| 531 | |
| 532 static UMSAudioDevice_ReturnCode UADClose(_THIS) | |
| 533 { | |
| 534 return UMSAudioDevice_close( this->hidden->umsdev, | |
| 535 this->hidden->ev ); | |
| 536 } | |
| 537 | |
| 538 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain) | |
| 539 { | |
| 540 return UMSAudioDevice_enable_output( this->hidden->umsdev, | |
| 541 this->hidden->ev, | |
| 542 output, | |
| 543 left_gain, | |
| 544 right_gain ); | |
| 545 } | |
| 546 |