libao2/ao_oss.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include <sys/ioctl.h>
   5 #include <unistd.h>
   6 #include <sys/time.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <fcntl.h>
  10 #include <errno.h>
  11 #include <string.h>
  12
  13 #include "config.h"
  14 #include "mp_msg.h"
  15 #include "mixer.h"
  16 #include "help_mp.h"
  17
  18 #ifdef HAVE_SYS_SOUNDCARD_H
  19 #include <sys/soundcard.h>
  20 #else
  21 #ifdef HAVE_SOUNDCARD_H
  22 #include <soundcard.h>
  23 #endif
  24 #endif
  25
  26 #include "libaf/af_format.h"
  27
  28 #include "audio_out.h"
  29 #include "audio_out_internal.h"
  30
  31 static ao_info_t info =
  32 {
  33         "OSS/ioctl audio output",
  34         "oss",
  35         "A'rpi",
  36         ""
  37 };
  38
  39 /* Support for >2 output channels added 2001-11-25 - Steve Davies <steve@daviesfam.org> */
  40
  41 LIBAO_EXTERN(oss)
  42
  43 static int format2oss(int format)
  44 {
  45     switch(format)
  46     {
  47     case AF_FORMAT_U8: return AFMT_U8;
  48     case AF_FORMAT_S8: return AFMT_S8;
  49     case AF_FORMAT_U16_LE: return AFMT_U16_LE;
  50     case AF_FORMAT_U16_BE: return AFMT_U16_BE;
  51     case AF_FORMAT_S16_LE: return AFMT_S16_LE;
  52     case AF_FORMAT_S16_BE: return AFMT_S16_BE;
  53 #ifdef AFMT_U24_LE
  54     case AF_FORMAT_U24_LE: return AFMT_U24_LE;
  55 #endif
  56 #ifdef AFMT_U24_BE
  57     case AF_FORMAT_U24_BE: return AFMT_U24_BE;
  58 #endif
  59 #ifdef AFMT_S24_LE
  60     case AF_FORMAT_S24_LE: return AFMT_S24_LE;
  61 #endif
  62 #ifdef AFMT_S24_BE
  63     case AF_FORMAT_S24_BE: return AFMT_S24_BE;
  64 #endif
  65 #ifdef AFMT_U32_LE
  66     case AF_FORMAT_U32_LE: return AFMT_U32_LE;
  67 #endif
  68 #ifdef AFMT_U32_BE
  69     case AF_FORMAT_U32_BE: return AFMT_U32_BE;
  70 #endif
  71 #ifdef AFMT_S32_LE
  72     case AF_FORMAT_S32_LE: return AFMT_S32_LE;
  73 #endif
  74 #ifdef AFMT_S32_BE
  75     case AF_FORMAT_S32_BE: return AFMT_S32_BE;
  76 #endif
  77 #ifdef AFMT_FLOAT
  78     case AF_FORMAT_FLOAT_NE: return AFMT_FLOAT;
  79 #endif
  80     // SPECIALS
  81     case AF_FORMAT_MU_LAW: return AFMT_MU_LAW;
  82     case AF_FORMAT_A_LAW: return AFMT_A_LAW;
  83     case AF_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
  84 #ifdef AFMT_MPEG
  85     case AF_FORMAT_MPEG2: return AFMT_MPEG;
  86 #endif
  87 #ifdef AFMT_AC3
  88     case AF_FORMAT_AC3: return AFMT_AC3;
  89 #endif
  90     }
  91     mp_msg(MSGT_AO, MSGL_V, "OSS: Unknown/not supported internal format: %s\n", af_fmt2str_short(format));
  92     return -1;
  93 }
  94
  95 static int oss2format(int format)
  96 {
  97     switch(format)
  98     {
  99     case AFMT_U8: return AF_FORMAT_U8;
 100     case AFMT_S8: return AF_FORMAT_S8;
 101     case AFMT_U16_LE: return AF_FORMAT_U16_LE;
 102     case AFMT_U16_BE: return AF_FORMAT_U16_BE;
 103     case AFMT_S16_LE: return AF_FORMAT_S16_LE;
 104     case AFMT_S16_BE: return AF_FORMAT_S16_BE;
 105 #ifdef AFMT_U24_LE
 106     case AFMT_U24_LE: return AF_FORMAT_U24_LE;
 107 #endif
 108 #ifdef AFMT_U24_BE
 109     case AFMT_U24_BE: return AF_FORMAT_U24_BE;
 110 #endif
 111 #ifdef AFMT_S24_LE
 112     case AFMT_S24_LE: return AF_FORMAT_S24_LE;
 113 #endif
 114 #ifdef AFMT_S24_BE
 115     case AFMT_S24_BE: return AF_FORMAT_S24_BE;
 116 #endif
 117 #ifdef AFMT_U32_LE
 118     case AFMT_U32_LE: return AF_FORMAT_U32_LE;
 119 #endif
 120 #ifdef AFMT_U32_BE
 121     case AFMT_U32_BE: return AF_FORMAT_U32_BE;
 122 #endif
 123 #ifdef AFMT_S32_LE
 124     case AFMT_S32_LE: return AF_FORMAT_S32_LE;
 125 #endif
 126 #ifdef AFMT_S32_BE
 127     case AFMT_S32_BE: return AF_FORMAT_S32_BE;
 128 #endif
 129 #ifdef AFMT_FLOAT
 130     case AFMT_FLOAT: return AF_FORMAT_FLOAT_NE;
 131 #endif
 132     // SPECIALS
 133     case AFMT_MU_LAW: return AF_FORMAT_MU_LAW;
 134     case AFMT_A_LAW: return AF_FORMAT_A_LAW;
 135     case AFMT_IMA_ADPCM: return AF_FORMAT_IMA_ADPCM;
 136 #ifdef AFMT_MPEG
 137     case AFMT_MPEG: return AF_FORMAT_MPEG2;
 138 #endif
 139 #ifdef AFMT_AC3
 140     case AFMT_AC3: return AF_FORMAT_AC3;
 141 #endif
 142     }
 143     mp_msg(MSGT_GLOBAL,MSGL_ERR,MSGTR_AO_OSS_UnknownUnsupportedFormat, format);
 144     return -1;
 145 }
 146
 147 static char *dsp=PATH_DEV_DSP;
 148 static audio_buf_info zz;
 149 static int audio_fd=-1;
 150
 151 static const char *oss_mixer_device = PATH_DEV_MIXER;
 152 static int oss_mixer_channel = SOUND_MIXER_PCM;
 153
 154 // to set/get/query special features/parameters
 155 static int control(int cmd,void *arg){
 156     switch(cmd){
 157         case AOCONTROL_SET_DEVICE:
 158             dsp=(char*)arg;
 159             return CONTROL_OK;
 160         case AOCONTROL_GET_DEVICE:
 161             *(char**)arg=dsp;
 162             return CONTROL_OK;
 163 #ifdef SNDCTL_DSP_GETFMTS
 164         case AOCONTROL_QUERY_FORMAT:
 165         {
 166             int format;
 167             if (!ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &format))
 168                 if (format & (int)arg)
 169                     return CONTROL_TRUE;
 170             return CONTROL_FALSE;
 171         }
 172 #endif
 173         case AOCONTROL_GET_VOLUME:
 174         case AOCONTROL_SET_VOLUME:
 175         {
 176             ao_control_vol_t *vol = (ao_control_vol_t *)arg;
 177             int fd, v, devs;
 178
 179             if(ao_data.format == AF_FORMAT_AC3)
 180                 return CONTROL_TRUE;
 181
 182             if ((fd = open(oss_mixer_device, O_RDONLY)) > 0)
 183             {
 184                 ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
 185                 if (devs & (1 << oss_mixer_channel))
 186                 {
 187                     if (cmd == AOCONTROL_GET_VOLUME)
 188                     {
 189                         ioctl(fd, MIXER_READ(oss_mixer_channel), &v);
 190                         vol->right = (v & 0xFF00) >> 8;
 191                         vol->left = v & 0x00FF;
 192                     }
 193                     else
 194                     {
 195                         v = ((int)vol->right << 8) | (int)vol->left;
 196                         ioctl(fd, MIXER_WRITE(oss_mixer_channel), &v);
 197                     }
 198                 }
 199                 else
 200                 {
 201                     close(fd);
 202                     return CONTROL_ERROR;
 203                 }
 204                 close(fd);
 205                 return CONTROL_OK;
 206             }
 207         }
 208         return CONTROL_ERROR;
 209     }
 210     return CONTROL_UNKNOWN;
 211 }
 212
 213 // open & setup audio device
 214 // return: 1=success 0=fail
 215 static int init(int rate,int channels,int format,int flags){
 216   char *mixer_channels [SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
 217   int oss_format;
 218   char *mdev = mixer_device, *mchan = mixer_channel;
 219
 220   mp_msg(MSGT_AO,MSGL_V,"ao2: %d Hz  %d chans  %s\n",rate,channels,
 221     af_fmt2str_short(format));
 222
 223   if (ao_subdevice) {
 224     char *m,*c;
 225     m = strchr(ao_subdevice,':');
 226     if(m) {
 227       c = strchr(m+1,':');
 228       if(c) {
 229         mchan = c+1;
 230         c[0] = '\0';
 231       }
 232       mdev = m+1;
 233       m[0] = '\0';
 234     }
 235     dsp = ao_subdevice;
 236   }
 237
 238   if(mdev)
 239     oss_mixer_device=mdev;
 240   else
 241     oss_mixer_device=PATH_DEV_MIXER;
 242
 243   if(mchan){
 244     int fd, devs, i;
 245
 246     if ((fd = open(oss_mixer_device, O_RDONLY)) == -1){
 247       mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantOpenMixer,
 248         oss_mixer_device, strerror(errno));
 249     }else{
 250       ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devs);
 251       close(fd);
 252
 253       for (i=0; i<SOUND_MIXER_NRDEVICES; i++){
 254         if(!strcasecmp(mixer_channels[i], mchan)){
 255           if(!(devs & (1 << i))){
 256             mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_ChanNotFound,mchan);
 257             i = SOUND_MIXER_NRDEVICES+1;
 258             break;
 259           }
 260           oss_mixer_channel = i;
 261           break;
 262         }
 263       }
 264       if(i==SOUND_MIXER_NRDEVICES){
 265         mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_ChanNotFound,mchan);
 266       }
 267     }
 268   } else
 269     oss_mixer_channel = SOUND_MIXER_PCM;
 270
 271   mp_msg(MSGT_AO,MSGL_V,"audio_setup: using '%s' dsp device\n", dsp);
 272   mp_msg(MSGT_AO,MSGL_V,"audio_setup: using '%s' mixer device\n", oss_mixer_device);
 273   mp_msg(MSGT_AO,MSGL_V,"audio_setup: using '%s' mixer device\n", mixer_channels[oss_mixer_channel]);
 274
 275 #ifdef __linux__
 276   audio_fd=open(dsp, O_WRONLY | O_NONBLOCK);
 277 #else
 278   audio_fd=open(dsp, O_WRONLY);
 279 #endif
 280   if(audio_fd<0){
 281     mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantOpenDev, dsp, strerror(errno));
 282     return 0;
 283   }
 284
 285 #ifdef __linux__
 286   /* Remove the non-blocking flag */
 287   if(fcntl(audio_fd, F_SETFL, 0) < 0) {
 288    mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantMakeFd, strerror(errno));
 289    return 0;
 290   }
 291 #endif
 292
 293 #if defined(FD_CLOEXEC) && defined(F_SETFD)
 294   fcntl(audio_fd, F_SETFD, FD_CLOEXEC);
 295 #endif
 296
 297   if(format == AF_FORMAT_AC3) {
 298     ao_data.samplerate=rate;
 299     ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_data.samplerate);
 300   }
 301
 302 ac3_retry:
 303   ao_data.format=format;
 304   oss_format=format2oss(format);
 305   if (oss_format == -1) {
 306 #ifdef WORDS_BIGENDIAN
 307     oss_format=AFMT_S16_BE;
 308 #else
 309     oss_format=AFMT_S16_LE;
 310 #endif
 311     format=AF_FORMAT_S16_NE;
 312   }
 313   if( ioctl(audio_fd, SNDCTL_DSP_SETFMT, &oss_format)<0 ||
 314       oss_format != format2oss(format)) {
 315     mp_msg(MSGT_AO,MSGL_WARN, MSGTR_AO_OSS_CantSet, dsp,
 316             af_fmt2str_short(format), af_fmt2str_short(AF_FORMAT_S16_NE) );
 317     format=AF_FORMAT_S16_NE;
 318     goto ac3_retry;
 319   }
 320 #if 0
 321   if(oss_format!=format2oss(format))
 322         mp_msg(MSGT_AO,MSGL_WARN,"WARNING! Your soundcard does NOT support %s sample format! Broken audio or bad playback speed are possible! Try with '-af format'\n",audio_out_format_name(format));
 323 #endif
 324
 325   ao_data.format = oss2format(oss_format);
 326   if (ao_data.format == -1) return 0;
 327
 328   mp_msg(MSGT_AO,MSGL_V,"audio_setup: sample format: %s (requested: %s)\n",
 329     af_fmt2str_short(ao_data.format), af_fmt2str_short(format));
 330
 331   ao_data.channels = channels;
 332   if(format != AF_FORMAT_AC3) {
 333     // We only use SNDCTL_DSP_CHANNELS for >2 channels, in case some drivers don't have it
 334     if (ao_data.channels > 2) {
 335       if ( ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &ao_data.channels) == -1 ||
 336            ao_data.channels != channels ) {
 337         mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantSetChans, channels);
 338         return 0;
 339       }
 340     }
 341     else {
 342       int c = ao_data.channels-1;
 343       if (ioctl (audio_fd, SNDCTL_DSP_STEREO, &c) == -1) {
 344         mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantSetChans, ao_data.channels);
 345         return 0;
 346       }
 347       ao_data.channels=c+1;
 348     }
 349     mp_msg(MSGT_AO,MSGL_V,"audio_setup: using %d channels (requested: %d)\n", ao_data.channels, channels);
 350     // set rate
 351     ao_data.samplerate=rate;
 352     ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_data.samplerate);
 353     mp_msg(MSGT_AO,MSGL_V,"audio_setup: using %d Hz samplerate (requested: %d)\n",ao_data.samplerate,rate);
 354   }
 355
 356   if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)==-1){
 357       int r=0;
 358       mp_msg(MSGT_AO,MSGL_WARN,MSGTR_AO_OSS_CantUseGetospace);
 359       if(ioctl(audio_fd, SNDCTL_DSP_GETBLKSIZE, &r)==-1){
 360           mp_msg(MSGT_AO,MSGL_V,"audio_setup: %d bytes/frag (config.h)\n",ao_data.outburst);
 361       } else {
 362           ao_data.outburst=r;
 363           mp_msg(MSGT_AO,MSGL_V,"audio_setup: %d bytes/frag (GETBLKSIZE)\n",ao_data.outburst);
 364       }
 365   } else {
 366       mp_msg(MSGT_AO,MSGL_V,"audio_setup: frags: %3d/%d  (%d bytes/frag)  free: %6d\n",
 367           zz.fragments, zz.fragstotal, zz.fragsize, zz.bytes);
 368       if(ao_data.buffersize==-1) ao_data.buffersize=zz.bytes;
 369       ao_data.outburst=zz.fragsize;
 370   }
 371
 372   if(ao_data.buffersize==-1){
 373     // Measuring buffer size:
 374     void* data;
 375     ao_data.buffersize=0;
 376 #ifdef HAVE_AUDIO_SELECT
 377     data=malloc(ao_data.outburst); memset(data,0,ao_data.outburst);
 378     while(ao_data.buffersize<0x40000){
 379       fd_set rfds;
 380       struct timeval tv;
 381       FD_ZERO(&rfds); FD_SET(audio_fd,&rfds);
 382       tv.tv_sec=0; tv.tv_usec = 0;
 383       if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) break;
 384       write(audio_fd,data,ao_data.outburst);
 385       ao_data.buffersize+=ao_data.outburst;
 386     }
 387     free(data);
 388     if(ao_data.buffersize==0){
 389         mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantUseSelect);
 390         return 0;
 391     }
 392 #endif
 393   }
 394
 395   ao_data.bps=ao_data.channels;
 396   if(ao_data.format != AF_FORMAT_U8 && ao_data.format != AF_FORMAT_S8)
 397     ao_data.bps*=2;
 398
 399   ao_data.outburst-=ao_data.outburst % ao_data.bps; // round down
 400   ao_data.bps*=ao_data.samplerate;
 401
 402     return 1;
 403 }
 404
 405 // close audio device
 406 static void uninit(int immed){
 407     if(audio_fd == -1) return;
 408 #ifdef SNDCTL_DSP_SYNC
 409     // to get the buffer played
 410     if (!immed)
 411         ioctl(audio_fd, SNDCTL_DSP_SYNC, NULL);
 412 #endif
 413 #ifdef SNDCTL_DSP_RESET
 414     if (immed)
 415         ioctl(audio_fd, SNDCTL_DSP_RESET, NULL);
 416 #endif
 417     close(audio_fd);
 418     audio_fd = -1;
 419 }
 420
 421 // stop playing and empty buffers (for seeking/pause)
 422 static void reset(void){
 423   int oss_format;
 424     uninit(1);
 425     audio_fd=open(dsp, O_WRONLY);
 426     if(audio_fd < 0){
 427         mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_OSS_CantReopen, strerror(errno));
 428         return;
 429     }
 430
 431 #if defined(FD_CLOEXEC) && defined(F_SETFD)
 432   fcntl(audio_fd, F_SETFD, FD_CLOEXEC);
 433 #endif
 434
 435   oss_format = format2oss(ao_data.format);
 436   ioctl (audio_fd, SNDCTL_DSP_SETFMT, &oss_format);
 437   if(ao_data.format != AF_FORMAT_AC3) {
 438     if (ao_data.channels > 2)
 439       ioctl (audio_fd, SNDCTL_DSP_CHANNELS, &ao_data.channels);
 440     else {
 441       int c = ao_data.channels-1;
 442       ioctl (audio_fd, SNDCTL_DSP_STEREO, &c);
 443     }
 444     ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_data.samplerate);
 445   }
 446 }
 447
 448 // stop playing, keep buffers (for pause)
 449 static void audio_pause(void)
 450 {
 451     uninit(1);
 452 }
 453
 454 // resume playing, after audio_pause()
 455 static void audio_resume(void)
 456 {
 457     reset();
 458 }
 459
 460
 461 // return: how many bytes can be played without blocking
 462 static int get_space(void){
 463   int playsize=ao_data.outburst;
 464
 465 #ifdef SNDCTL_DSP_GETOSPACE
 466   if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)!=-1){
 467       // calculate exact buffer space:
 468       playsize = zz.fragments*zz.fragsize;
 469       if (playsize > MAX_OUTBURST)
 470         playsize = (MAX_OUTBURST / zz.fragsize) * zz.fragsize;
 471       return playsize;
 472   }
 473 #endif
 474
 475     // check buffer
 476 #ifdef HAVE_AUDIO_SELECT
 477     {  fd_set rfds;
 478        struct timeval tv;
 479        FD_ZERO(&rfds);
 480        FD_SET(audio_fd, &rfds);
 481        tv.tv_sec = 0;
 482        tv.tv_usec = 0;
 483        if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) return 0; // not block!
 484     }
 485 #endif
 486
 487   return ao_data.outburst;
 488 }
 489
 490 // plays 'len' bytes of 'data'
 491 // it should round it down to outburst*n
 492 // return: number of bytes played
 493 static int play(void* data,int len,int flags){
 494     if(len==0)
 495         return len;
 496     if(len>ao_data.outburst || !(flags & AOPLAY_FINAL_CHUNK)) {
 497         len/=ao_data.outburst;
 498         len*=ao_data.outburst;
 499     }
 500     len=write(audio_fd,data,len);
 501     return len;
 502 }
 503
 504 static int audio_delay_method=2;
 505
 506 // return: delay in seconds between first and last sample in buffer
 507 static float get_delay(void){
 508   /* Calculate how many bytes/second is sent out */
 509   if(audio_delay_method==2){
 510 #ifdef SNDCTL_DSP_GETODELAY
 511       int r=0;
 512       if(ioctl(audio_fd, SNDCTL_DSP_GETODELAY, &r)!=-1)
 513          return ((float)r)/(float)ao_data.bps;
 514 #endif
 515       audio_delay_method=1; // fallback if not supported
 516   }
 517   if(audio_delay_method==1){
 518       // SNDCTL_DSP_GETOSPACE
 519       if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)!=-1)
 520          return ((float)(ao_data.buffersize-zz.bytes))/(float)ao_data.bps;
 521       audio_delay_method=0; // fallback if not supported
 522   }
 523   return ((float)ao_data.buffersize)/(float)ao_data.bps;
 524 }