Mercurial > sdl-ios-xcode
annotate src/audio/ums/SDL_umsaudio.c @ 4001:6831b8723a85 SDL-1.2
Don't initialize the audio buffer passed to the application's audio callback,
since they are expected to entirely fill it with data or silence.
For legacy apps that might expect the buffer to already have silence and thus
may not fill the buffer in the callback, there's an environment variable to
expose the old behaviour.
Fixes Bugzilla #416.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 05 Jul 2007 02:24:36 +0000 |
| parents | cf4744dbb1cf |
| children | a1b03ba2fcd0 |
| 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 */ | |
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24 #include "SDL_config.h" |
| 0 | 25 |
| 26 /* Allow access to a raw mixing buffer */ | |
| 27 | |
| 28 #include <errno.h> | |
| 29 #include <unistd.h> | |
| 30 #include <fcntl.h> | |
| 31 #include <sys/types.h> | |
| 32 #include <sys/time.h> | |
| 33 #include <sys/ioctl.h> | |
| 34 #include <sys/stat.h> | |
| 35 #include <sys/mman.h> | |
| 36 | |
| 37 #include "SDL_audio.h" | |
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38 #include "../SDL_audio_c.h" |
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39 #include "../SDL_audiodev_c.h" |
| 0 | 40 #include "SDL_umsaudio.h" |
| 41 | |
| 42 /* The tag name used by UMS audio */ | |
| 43 #define UMS_DRIVER_NAME "ums" | |
| 44 | |
| 45 #define DEBUG_AUDIO 1 | |
| 46 | |
| 47 /* Audio driver functions */ | |
| 48 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 49 static void UMS_PlayAudio(_THIS); | |
| 50 static Uint8 *UMS_GetAudioBuf(_THIS); | |
| 51 static void UMS_CloseAudio(_THIS); | |
| 52 | |
| 53 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags); | |
| 54 static UMSAudioDevice_ReturnCode UADClose(_THIS); | |
| 55 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits); | |
| 56 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits); | |
| 57 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate); | |
| 58 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order); | |
| 59 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt); | |
| 60 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt); | |
| 61 static UMSAudioDevice_ReturnCode UADInitialize(_THIS); | |
| 62 static UMSAudioDevice_ReturnCode UADStart(_THIS); | |
| 63 static UMSAudioDevice_ReturnCode UADStop(_THIS); | |
| 64 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt ); | |
| 65 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size ); | |
| 66 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size ); | |
| 67 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size ); | |
| 68 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret ); | |
| 69 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume ); | |
| 70 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance ); | |
| 71 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels ); | |
| 72 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block ); | |
| 73 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain); | |
| 74 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, long samples, long* samples_written); | |
| 75 | |
| 76 /* Audio driver bootstrap functions */ | |
| 77 static int Audio_Available(void) | |
| 78 { | |
| 79 return 1; | |
| 80 } | |
| 81 | |
| 82 static void Audio_DeleteDevice(_THIS) | |
| 83 { | |
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84 if(this->hidden->playbuf._buffer) SDL_free(this->hidden->playbuf._buffer); |
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85 if(this->hidden->fillbuf._buffer) SDL_free(this->hidden->fillbuf._buffer); |
| 0 | 86 _somFree( this->hidden->umsdev ); |
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87 SDL_free(this->hidden); |
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88 SDL_free(this); |
| 0 | 89 } |
| 90 | |
| 91 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 92 { | |
| 93 SDL_AudioDevice *this; | |
| 94 | |
| 95 /* | |
| 96 * Allocate and initialize management storage and private management | |
| 97 * storage for this SDL-using library. | |
| 98 */ | |
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99 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 100 if ( this ) { |
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101 SDL_memset(this, 0, (sizeof *this)); |
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102 this->hidden = (struct SDL_PrivateAudioData *)SDL_malloc((sizeof *this->hidden)); |
| 0 | 103 } |
| 104 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 105 SDL_OutOfMemory(); | |
| 106 if ( this ) { | |
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107 SDL_free(this); |
| 0 | 108 } |
| 109 return(0); | |
| 110 } | |
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111 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 112 #ifdef DEBUG_AUDIO |
| 113 fprintf(stderr, "Creating UMS Audio device\n"); | |
| 114 #endif | |
| 115 | |
| 116 /* | |
| 117 * Calls for UMS env initialization and audio object construction. | |
| 118 */ | |
| 119 this->hidden->ev = somGetGlobalEnvironment(); | |
| 120 this->hidden->umsdev = UMSAudioDeviceNew(); | |
| 121 | |
| 122 /* | |
| 123 * Set the function pointers. | |
| 124 */ | |
| 125 this->OpenAudio = UMS_OpenAudio; | |
| 126 this->WaitAudio = NULL; /* we do blocking output */ | |
| 127 this->PlayAudio = UMS_PlayAudio; | |
| 128 this->GetAudioBuf = UMS_GetAudioBuf; | |
| 129 this->CloseAudio = UMS_CloseAudio; | |
| 130 this->free = Audio_DeleteDevice; | |
| 131 | |
| 132 #ifdef DEBUG_AUDIO | |
| 133 fprintf(stderr, "done\n"); | |
| 134 #endif | |
| 135 return this; | |
| 136 } | |
| 137 | |
| 138 AudioBootStrap UMS_bootstrap = { | |
| 3876 | 139 UMS_DRIVER_NAME, "AIX UMS audio", |
| 0 | 140 Audio_Available, Audio_CreateDevice |
| 141 }; | |
| 142 | |
| 143 static Uint8 *UMS_GetAudioBuf(_THIS) | |
| 144 { | |
| 145 #ifdef DEBUG_AUDIO | |
| 146 fprintf(stderr, "enter UMS_GetAudioBuf\n"); | |
| 147 #endif | |
| 148 return this->hidden->fillbuf._buffer; | |
| 149 /* | |
| 150 long bufSize; | |
| 151 UMSAudioDevice_ReturnCode rc; | |
| 152 | |
| 153 rc = UADSetTimeFormat(this, UMSAudioTypes_Bytes ); | |
| 154 rc = UADWriteBuffSize(this, bufSize ); | |
| 155 */ | |
| 156 } | |
| 157 | |
| 158 static void UMS_CloseAudio(_THIS) | |
| 159 { | |
| 160 UMSAudioDevice_ReturnCode rc; | |
| 161 | |
| 162 #ifdef DEBUG_AUDIO | |
| 163 fprintf(stderr, "enter UMS_CloseAudio\n"); | |
| 164 #endif | |
| 165 rc = UADPlayRemainingData(this, TRUE); | |
| 166 rc = UADStop(this); | |
| 167 rc = UADClose(this); | |
| 168 } | |
| 169 | |
| 170 static void UMS_PlayAudio(_THIS) | |
| 171 { | |
| 172 UMSAudioDevice_ReturnCode rc; | |
| 173 long samplesToWrite; | |
| 174 long samplesWritten; | |
| 175 UMSAudioTypes_Buffer swpbuf; | |
| 176 | |
| 177 #ifdef DEBUG_AUDIO | |
| 178 fprintf(stderr, "enter UMS_PlayAudio\n"); | |
| 179 #endif | |
| 180 samplesToWrite = this->hidden->playbuf._length/this->hidden->bytesPerSample; | |
| 181 do | |
| 182 { | |
| 183 rc = UADWrite(this, &this->hidden->playbuf, | |
| 184 samplesToWrite, | |
| 185 &samplesWritten ); | |
| 186 samplesToWrite -= samplesWritten; | |
| 187 | |
| 188 /* rc values: UMSAudioDevice_Success | |
| 189 * UMSAudioDevice_Failure | |
| 190 * UMSAudioDevice_Preempted | |
| 191 * UMSAudioDevice_Interrupted | |
| 192 * UMSAudioDevice_DeviceError | |
| 193 */ | |
| 194 if ( rc == UMSAudioDevice_DeviceError ) { | |
| 195 #ifdef DEBUG_AUDIO | |
| 196 fprintf(stderr, "Returning from PlayAudio with devices error\n"); | |
| 197 #endif | |
| 198 return; | |
| 199 } | |
| 200 } | |
| 201 while(samplesToWrite>0); | |
| 202 | |
| 203 SDL_LockAudio(); | |
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204 SDL_memcpy( &swpbuf, &this->hidden->playbuf, sizeof(UMSAudioTypes_Buffer) ); |
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205 SDL_memcpy( &this->hidden->playbuf, &this->hidden->fillbuf, sizeof(UMSAudioTypes_Buffer) ); |
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206 SDL_memcpy( &this->hidden->fillbuf, &swpbuf, sizeof(UMSAudioTypes_Buffer) ); |
| 0 | 207 SDL_UnlockAudio(); |
| 208 | |
| 209 #ifdef DEBUG_AUDIO | |
| 210 fprintf(stderr, "Wrote audio data and swapped buffer\n"); | |
| 211 #endif | |
| 212 } | |
| 213 | |
| 214 #if 0 | |
| 215 // /* Set the DSP frequency */ | |
| 216 // value = spec->freq; | |
| 217 // if ( ioctl(this->hidden->audio_fd, SOUND_PCM_WRITE_RATE, &value) < 0 ) { | |
| 218 // SDL_SetError("Couldn't set audio frequency"); | |
| 219 // return(-1); | |
| 220 // } | |
| 221 // spec->freq = value; | |
| 222 #endif | |
| 223 | |
| 224 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 225 { | |
| 226 char* audiodev = "/dev/paud0"; | |
| 227 long lgain; | |
| 228 long rgain; | |
| 229 long outRate; | |
| 230 long outBufSize; | |
| 231 long bitsPerSample; | |
| 232 long samplesPerSec; | |
| 233 long success; | |
| 234 Uint16 test_format; | |
| 235 int frag_spec; | |
| 236 UMSAudioDevice_ReturnCode rc; | |
| 237 | |
| 238 #ifdef DEBUG_AUDIO | |
| 239 fprintf(stderr, "enter UMS_OpenAudio\n"); | |
| 240 #endif | |
| 241 rc = UADOpen(this, audiodev,"PLAY", UMSAudioDevice_BlockingIO); | |
| 242 if ( rc != UMSAudioDevice_Success ) { | |
| 243 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); | |
| 244 return -1; | |
| 245 } | |
| 246 | |
| 247 rc = UADSetAudioFormatType(this, "PCM"); | |
| 248 | |
| 249 success = 0; | |
| 250 test_format = SDL_FirstAudioFormat(spec->format); | |
| 251 do | |
| 252 { | |
| 253 #ifdef DEBUG_AUDIO | |
| 254 fprintf(stderr, "Trying format 0x%4.4x\n", test_format); | |
| 255 #endif | |
| 256 switch ( test_format ) | |
| 257 { | |
| 258 case AUDIO_U8: | |
| 259 /* from the mac code: better ? */ | |
| 260 /* sample_bits = spec->size / spec->samples / spec->channels * 8; */ | |
| 261 success = 1; | |
| 262 bitsPerSample = 8; | |
| 263 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 264 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */ | |
| 265 rc = UADSetNumberFormat(this, "UNSIGNED"); | |
| 266 break; | |
| 267 case AUDIO_S8: | |
| 268 success = 1; | |
| 269 bitsPerSample = 8; | |
| 270 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 271 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */ | |
| 272 rc = UADSetNumberFormat(this, "SIGNED"); | |
| 273 break; | |
| 274 case AUDIO_S16LSB: | |
| 275 success = 1; | |
| 276 bitsPerSample = 16; | |
| 277 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 278 rc = UADSetByteOrder(this, "LSB"); | |
| 279 rc = UADSetNumberFormat(this, "SIGNED"); | |
| 280 break; | |
| 281 case AUDIO_S16MSB: | |
| 282 success = 1; | |
| 283 bitsPerSample = 16; | |
| 284 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 285 rc = UADSetByteOrder(this, "MSB"); | |
| 286 rc = UADSetNumberFormat(this, "SIGNED"); | |
| 287 break; | |
| 288 case AUDIO_U16LSB: | |
| 289 success = 1; | |
| 290 bitsPerSample = 16; | |
| 291 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 292 rc = UADSetByteOrder(this, "LSB"); | |
| 293 rc = UADSetNumberFormat(this, "UNSIGNED"); | |
| 294 break; | |
| 295 case AUDIO_U16MSB: | |
| 296 success = 1; | |
| 297 bitsPerSample = 16; | |
| 298 rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); | |
| 299 rc = UADSetByteOrder(this, "MSB"); | |
| 300 rc = UADSetNumberFormat(this, "UNSIGNED"); | |
| 301 break; | |
| 302 default: | |
| 303 break; | |
| 304 } | |
| 305 if ( ! success ) { | |
| 306 test_format = SDL_NextAudioFormat(); | |
| 307 } | |
| 308 } | |
| 309 while ( ! success && test_format ); | |
| 310 | |
| 311 if ( success == 0 ) { | |
| 312 SDL_SetError("Couldn't find any hardware audio formats"); | |
| 313 return -1; | |
| 314 } | |
| 315 | |
| 316 spec->format = test_format; | |
| 317 | |
| 318 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); | |
| 319 if ( (0x01<<frag_spec) != spec->size ) { | |
| 320 SDL_SetError("Fragment size must be a power of two"); | |
| 321 return -1; | |
| 322 } | |
| 323 if ( frag_spec > 2048 ) frag_spec = 2048; | |
| 324 | |
| 325 this->hidden->bytesPerSample = (bitsPerSample / 8) * spec->channels; | |
| 326 samplesPerSec = this->hidden->bytesPerSample * outRate; | |
| 327 | |
| 328 this->hidden->playbuf._length = 0; | |
| 329 this->hidden->playbuf._maximum = spec->size; | |
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330 this->hidden->playbuf._buffer = (unsigned char*)SDL_malloc(spec->size); |
| 0 | 331 this->hidden->fillbuf._length = 0; |
| 332 this->hidden->fillbuf._maximum = spec->size; | |
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333 this->hidden->fillbuf._buffer = (unsigned char*)SDL_malloc(spec->size); |
| 0 | 334 |
| 335 rc = UADSetBitsPerSample(this, bitsPerSample ); | |
| 336 rc = UADSetDMABufferSize(this, frag_spec, &outBufSize ); | |
| 337 rc = UADSetChannels(this, spec->channels); /* functions reduces to mono or stereo */ | |
| 338 | |
| 339 lgain = 100; /*maximum left input gain*/ | |
| 340 rgain = 100; /*maimum right input gain*/ | |
| 341 rc = UADEnableOutput(this, "LINE_OUT",&lgain,&rgain); | |
| 342 rc = UADInitialize(this); | |
| 343 rc = UADStart(this); | |
| 344 rc = UADSetVolume(this, 100); | |
| 345 rc = UADSetBalance(this, 0); | |
| 346 | |
| 347 /* We're ready to rock and roll. :-) */ | |
| 348 return 0; | |
| 349 } | |
| 350 | |
| 351 | |
| 352 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits) | |
| 353 { | |
| 354 return UMSAudioDevice_get_bits_per_sample( this->hidden->umsdev, | |
| 355 this->hidden->ev, | |
| 356 bits ); | |
| 357 } | |
| 358 | |
| 359 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits) | |
| 360 { | |
| 361 return UMSAudioDevice_set_bits_per_sample( this->hidden->umsdev, | |
| 362 this->hidden->ev, | |
| 363 bits ); | |
| 364 } | |
| 365 | |
| 366 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate) | |
| 367 { | |
| 368 /* from the mac code: sample rate = spec->freq << 16; */ | |
| 369 return UMSAudioDevice_set_sample_rate( this->hidden->umsdev, | |
| 370 this->hidden->ev, | |
| 371 rate, | |
| 372 set_rate ); | |
| 373 } | |
| 374 | |
| 375 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order) | |
| 376 { | |
| 377 return UMSAudioDevice_set_byte_order( this->hidden->umsdev, | |
| 378 this->hidden->ev, | |
| 379 byte_order ); | |
| 380 } | |
| 381 | |
| 382 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt) | |
| 383 { | |
| 384 /* possible PCM, A_LAW or MU_LAW */ | |
| 385 return UMSAudioDevice_set_audio_format_type( this->hidden->umsdev, | |
| 386 this->hidden->ev, | |
| 387 fmt ); | |
| 388 } | |
| 389 | |
| 390 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt) | |
| 391 { | |
| 392 /* possible SIGNED, UNSIGNED, or TWOS_COMPLEMENT */ | |
| 393 return UMSAudioDevice_set_number_format( this->hidden->umsdev, | |
| 394 this->hidden->ev, | |
| 395 fmt ); | |
| 396 } | |
| 397 | |
| 398 static UMSAudioDevice_ReturnCode UADInitialize(_THIS) | |
| 399 { | |
| 400 return UMSAudioDevice_initialize( this->hidden->umsdev, | |
| 401 this->hidden->ev ); | |
| 402 } | |
| 403 | |
| 404 static UMSAudioDevice_ReturnCode UADStart(_THIS) | |
| 405 { | |
| 406 return UMSAudioDevice_start( this->hidden->umsdev, | |
| 407 this->hidden->ev ); | |
| 408 } | |
| 409 | |
| 410 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt ) | |
| 411 { | |
| 412 /* | |
| 413 * Switches the time format to the new format, immediately. | |
| 414 * possible UMSAudioTypes_Msecs, UMSAudioTypes_Bytes or UMSAudioTypes_Samples | |
| 415 */ | |
| 416 return UMSAudioDevice_set_time_format( this->hidden->umsdev, | |
| 417 this->hidden->ev, | |
| 418 fmt ); | |
| 419 } | |
| 420 | |
| 421 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size ) | |
| 422 { | |
| 423 /* | |
| 424 * returns write buffer size in the current time format | |
| 425 */ | |
| 426 return UMSAudioDevice_write_buff_size( this->hidden->umsdev, | |
| 427 this->hidden->ev, | |
| 428 buff_size ); | |
| 429 } | |
| 430 | |
| 431 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size ) | |
| 432 { | |
| 433 /* | |
| 434 * returns amount of available space in the write buffer | |
| 435 * in the current time format | |
| 436 */ | |
| 437 return UMSAudioDevice_write_buff_remain( this->hidden->umsdev, | |
| 438 this->hidden->ev, | |
| 439 buff_size ); | |
| 440 } | |
| 441 | |
| 442 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size ) | |
| 443 { | |
| 444 /* | |
| 445 * returns amount of filled space in the write buffer | |
| 446 * in the current time format | |
| 447 */ | |
| 448 return UMSAudioDevice_write_buff_used( this->hidden->umsdev, | |
| 449 this->hidden->ev, | |
| 450 buff_size ); | |
| 451 } | |
| 452 | |
| 453 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret ) | |
| 454 { | |
| 455 /* | |
| 456 * Request a new DMA buffer size, maximum requested size 2048. | |
| 457 * Takes effect with next initialize() call. | |
| 458 * Devices may or may not support DMA. | |
| 459 */ | |
| 460 return UMSAudioDevice_set_DMA_buffer_size( this->hidden->umsdev, | |
| 461 this->hidden->ev, | |
| 462 bytes, | |
| 463 bytes_ret ); | |
| 464 } | |
| 465 | |
| 466 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume ) | |
| 467 { | |
| 468 /* | |
| 469 * Set the volume. | |
| 470 * Takes effect immediately. | |
| 471 */ | |
| 472 return UMSAudioDevice_set_volume( this->hidden->umsdev, | |
| 473 this->hidden->ev, | |
| 474 volume ); | |
| 475 } | |
| 476 | |
| 477 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance ) | |
| 478 { | |
| 479 /* | |
| 480 * Set the balance. | |
| 481 * Takes effect immediately. | |
| 482 */ | |
| 483 return UMSAudioDevice_set_balance( this->hidden->umsdev, | |
| 484 this->hidden->ev, | |
| 485 balance ); | |
| 486 } | |
| 487 | |
| 488 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels ) | |
| 489 { | |
| 490 /* | |
| 491 * Set mono or stereo. | |
| 492 * Takes effect with next initialize() call. | |
| 493 */ | |
| 494 if ( channels != 1 ) channels = 2; | |
| 495 return UMSAudioDevice_set_number_of_channels( this->hidden->umsdev, | |
| 496 this->hidden->ev, | |
| 497 channels ); | |
| 498 } | |
| 499 | |
| 500 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags) | |
| 501 { | |
| 502 return UMSAudioDevice_open( this->hidden->umsdev, | |
| 503 this->hidden->ev, | |
| 504 device, | |
| 505 mode, | |
| 506 flags ); | |
| 507 } | |
| 508 | |
| 509 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, | |
| 510 long samples, | |
| 511 long* samples_written) | |
| 512 { | |
| 513 return UMSAudioDevice_write( this->hidden->umsdev, | |
| 514 this->hidden->ev, | |
| 515 buff, | |
| 516 samples, | |
| 517 samples_written ); | |
| 518 } | |
| 519 | |
| 520 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block ) | |
| 521 { | |
| 522 return UMSAudioDevice_play_remaining_data( this->hidden->umsdev, | |
| 523 this->hidden->ev, | |
| 524 block); | |
| 525 } | |
| 526 | |
| 527 static UMSAudioDevice_ReturnCode UADStop(_THIS) | |
| 528 { | |
| 529 return UMSAudioDevice_stop( this->hidden->umsdev, | |
| 530 this->hidden->ev ); | |
| 531 } | |
| 532 | |
| 533 static UMSAudioDevice_ReturnCode UADClose(_THIS) | |
| 534 { | |
| 535 return UMSAudioDevice_close( this->hidden->umsdev, | |
| 536 this->hidden->ev ); | |
| 537 } | |
| 538 | |
| 539 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain) | |
| 540 { | |
| 541 return UMSAudioDevice_enable_output( this->hidden->umsdev, | |
| 542 this->hidden->ev, | |
| 543 output, | |
| 544 left_gain, | |
| 545 right_gain ); | |
| 546 } | |
| 547 |