Alc/backends/qsa.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 2011-2013 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <sched.h>
  26 #include <errno.h>
  27 #include <memory.h>
  28 #include <sys/select.h>
  29 #include <sys/asoundlib.h>
  30 #include <sys/neutrino.h>
  31
  32 #include "alMain.h"
  33 #include "alu.h"
  34 #include "threads.h"
  35
  36 #include "backends/base.h"
  37
  38
  39 typedef struct {
  40     snd_pcm_t* pcmHandle;
  41     int audio_fd;
  42
  43     snd_pcm_channel_setup_t  csetup;
  44     snd_pcm_channel_params_t cparams;
  45
  46     ALvoid* buffer;
  47     ALsizei size;
  48
  49     volatile int killNow;
  50     althrd_t thread;
  51 } qsa_data;
  52
  53 typedef struct {
  54     ALCchar* name;
  55     int card;
  56     int dev;
  57 } DevMap;
  58 TYPEDEF_VECTOR(DevMap, vector_DevMap)
  59
  60 static vector_DevMap DeviceNameMap;
  61 static vector_DevMap CaptureNameMap;
  62
  63 static const ALCchar qsaDevice[] = "QSA Default";
  64
  65 static const struct {
  66     int32_t format;
  67 } formatlist[] = {
  68     {SND_PCM_SFMT_FLOAT_LE},
  69     {SND_PCM_SFMT_S32_LE},
  70     {SND_PCM_SFMT_U32_LE},
  71     {SND_PCM_SFMT_S16_LE},
  72     {SND_PCM_SFMT_U16_LE},
  73     {SND_PCM_SFMT_S8},
  74     {SND_PCM_SFMT_U8},
  75     {0},
  76 };
  77
  78 static const struct {
  79     int32_t rate;
  80 } ratelist[] = {
  81     {192000},
  82     {176400},
  83     {96000},
  84     {88200},
  85     {48000},
  86     {44100},
  87     {32000},
  88     {24000},
  89     {22050},
  90     {16000},
  91     {12000},
  92     {11025},
  93     {8000},
  94     {0},
  95 };
  96
  97 static const struct {
  98     int32_t channels;
  99 } channellist[] = {
 100     {8},
 101     {7},
 102     {6},
 103     {4},
 104     {2},
 105     {1},
 106     {0},
 107 };
 108
 109 static void deviceList(int type, vector_DevMap *devmap)
 110 {
 111     snd_ctl_t* handle;
 112     snd_pcm_info_t pcminfo;
 113     int max_cards, card, err, dev;
 114     DevMap entry;
 115     char name[1024];
 116     struct snd_ctl_hw_info info;
 117
 118     max_cards = snd_cards();
 119     if(max_cards < 0)
 120         return;
 121
 122     VECTOR_RESIZE(*devmap, 0, max_cards+1);
 123
 124     entry.name = strdup(qsaDevice);
 125     entry.card = 0;
 126     entry.dev = 0;
 127     VECTOR_PUSH_BACK(*devmap, entry);
 128
 129     for(card = 0;card < max_cards;card++)
 130     {
 131         if((err=snd_ctl_open(&handle, card)) < 0)
 132             continue;
 133
 134         if((err=snd_ctl_hw_info(handle, &info)) < 0)
 135         {
 136             snd_ctl_close(handle);
 137             continue;
 138         }
 139
 140         for(dev = 0;dev < (int)info.pcmdevs;dev++)
 141         {
 142             if((err=snd_ctl_pcm_info(handle, dev, &pcminfo)) < 0)
 143                 continue;
 144
 145             if((type==SND_PCM_CHANNEL_PLAYBACK && (pcminfo.flags&SND_PCM_INFO_PLAYBACK)) ||
 146                (type==SND_PCM_CHANNEL_CAPTURE && (pcminfo.flags&SND_PCM_INFO_CAPTURE)))
 147             {
 148                 snprintf(name, sizeof(name), "%s [%s] (hw:%d,%d)", info.name, pcminfo.name, card, dev);
 149                 entry.name = strdup(name);
 150                 entry.card = card;
 151                 entry.dev = dev;
 152
 153                 VECTOR_PUSH_BACK(*devmap, entry);
 154                 TRACE("Got device \"%s\", card %d, dev %d\n", name, card, dev);
 155             }
 156         }
 157         snd_ctl_close(handle);
 158     }
 159 }
 160
 161
 162 /* Wrappers to use an old-style backend with the new interface. */
 163 typedef struct PlaybackWrapper {
 164     DERIVE_FROM_TYPE(ALCbackend);
 165     qsa_data *ExtraData;
 166 } PlaybackWrapper;
 167
 168 static void PlaybackWrapper_Construct(PlaybackWrapper *self, ALCdevice *device);
 169 static void PlaybackWrapper_Destruct(PlaybackWrapper *self);
 170 static ALCenum PlaybackWrapper_open(PlaybackWrapper *self, const ALCchar *name);
 171 static ALCboolean PlaybackWrapper_reset(PlaybackWrapper *self);
 172 static ALCboolean PlaybackWrapper_start(PlaybackWrapper *self);
 173 static void PlaybackWrapper_stop(PlaybackWrapper *self);
 174 static DECLARE_FORWARD2(PlaybackWrapper, ALCbackend, ALCenum, captureSamples, void*, ALCuint)
 175 static DECLARE_FORWARD(PlaybackWrapper, ALCbackend, ALCuint, availableSamples)
 176 static DECLARE_FORWARD(PlaybackWrapper, ALCbackend, ClockLatency, getClockLatency)
 177 static DECLARE_FORWARD(PlaybackWrapper, ALCbackend, void, lock)
 178 static DECLARE_FORWARD(PlaybackWrapper, ALCbackend, void, unlock)
 179 DECLARE_DEFAULT_ALLOCATORS(PlaybackWrapper)
 180 DEFINE_ALCBACKEND_VTABLE(PlaybackWrapper);
 181
 182
 183 FORCE_ALIGN static int qsa_proc_playback(void *ptr)
 184 {
 185     PlaybackWrapper *self = ptr;
 186     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 187     qsa_data *data = self->ExtraData;
 188     snd_pcm_channel_status_t status;
 189     struct sched_param param;
 190     struct timeval timeout;
 191     char* write_ptr;
 192     fd_set wfds;
 193     ALint len;
 194     int sret;
 195
 196     SetRTPriority();
 197     althrd_setname(althrd_current(), MIXER_THREAD_NAME);
 198
 199     /* Increase default 10 priority to 11 to avoid jerky sound */
 200     SchedGet(0, 0, &param);
 201     param.sched_priority=param.sched_curpriority+1;
 202     SchedSet(0, 0, SCHED_NOCHANGE, &param);
 203
 204     const ALint frame_size = FrameSizeFromDevFmt(
 205         device->FmtChans, device->FmtType, device->AmbiOrder
 206     );
 207
 208     V0(device->Backend,lock)();
 209     while(!data->killNow)
 210     {
 211         FD_ZERO(&wfds);
 212         FD_SET(data->audio_fd, &wfds);
 213         timeout.tv_sec=2;
 214         timeout.tv_usec=0;
 215
 216         /* Select also works like time slice to OS */
 217         V0(device->Backend,unlock)();
 218         sret = select(data->audio_fd+1, NULL, &wfds, NULL, &timeout);
 219         V0(device->Backend,lock)();
 220         if(sret == -1)
 221         {
 222             ERR("select error: %s\n", strerror(errno));
 223             aluHandleDisconnect(device);
 224             break;
 225         }
 226         if(sret == 0)
 227         {
 228             ERR("select timeout\n");
 229             continue;
 230         }
 231
 232         len = data->size;
 233         write_ptr = data->buffer;
 234         aluMixData(device, write_ptr, len/frame_size);
 235         while(len>0 && !data->killNow)
 236         {
 237             int wrote = snd_pcm_plugin_write(data->pcmHandle, write_ptr, len);
 238             if(wrote <= 0)
 239             {
 240                 if(errno==EAGAIN || errno==EWOULDBLOCK)
 241                     continue;
 242
 243                 memset(&status, 0, sizeof(status));
 244                 status.channel = SND_PCM_CHANNEL_PLAYBACK;
 245
 246                 snd_pcm_plugin_status(data->pcmHandle, &status);
 247
 248                 /* we need to reinitialize the sound channel if we've underrun the buffer */
 249                 if(status.status == SND_PCM_STATUS_UNDERRUN ||
 250                    status.status == SND_PCM_STATUS_READY)
 251                 {
 252                     if(snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_PLAYBACK) < 0)
 253                     {
 254                         aluHandleDisconnect(device);
 255                         break;
 256                     }
 257                 }
 258             }
 259             else
 260             {
 261                 write_ptr += wrote;
 262                 len -= wrote;
 263             }
 264         }
 265     }
 266     V0(device->Backend,unlock)();
 267
 268     return 0;
 269 }
 270
 271 /************/
 272 /* Playback */
 273 /************/
 274
 275 static ALCenum qsa_open_playback(PlaybackWrapper *self, const ALCchar* deviceName)
 276 {
 277     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 278     qsa_data *data;
 279     int card, dev;
 280     int status;
 281
 282     data = (qsa_data*)calloc(1, sizeof(qsa_data));
 283     if(data == NULL)
 284         return ALC_OUT_OF_MEMORY;
 285
 286     if(!deviceName)
 287         deviceName = qsaDevice;
 288
 289     if(strcmp(deviceName, qsaDevice) == 0)
 290         status = snd_pcm_open_preferred(&data->pcmHandle, &card, &dev, SND_PCM_OPEN_PLAYBACK);
 291     else
 292     {
 293         const DevMap *iter;
 294
 295         if(VECTOR_SIZE(DeviceNameMap) == 0)
 296             deviceList(SND_PCM_CHANNEL_PLAYBACK, &DeviceNameMap);
 297
 298 #define MATCH_DEVNAME(iter) ((iter)->name && strcmp(deviceName, (iter)->name)==0)
 299         VECTOR_FIND_IF(iter, const DevMap, DeviceNameMap, MATCH_DEVNAME);
 300 #undef MATCH_DEVNAME
 301         if(iter == VECTOR_END(DeviceNameMap))
 302         {
 303             free(data);
 304             return ALC_INVALID_DEVICE;
 305         }
 306
 307         status = snd_pcm_open(&data->pcmHandle, iter->card, iter->dev, SND_PCM_OPEN_PLAYBACK);
 308     }
 309
 310     if(status < 0)
 311     {
 312         free(data);
 313         return ALC_INVALID_DEVICE;
 314     }
 315
 316     data->audio_fd = snd_pcm_file_descriptor(data->pcmHandle, SND_PCM_CHANNEL_PLAYBACK);
 317     if(data->audio_fd < 0)
 318     {
 319         snd_pcm_close(data->pcmHandle);
 320         free(data);
 321         return ALC_INVALID_DEVICE;
 322     }
 323
 324     alstr_copy_cstr(&device->DeviceName, deviceName);
 325     self->ExtraData = data;
 326
 327     return ALC_NO_ERROR;
 328 }
 329
 330 static void qsa_close_playback(PlaybackWrapper *self)
 331 {
 332     qsa_data *data = self->ExtraData;
 333
 334     if (data->buffer!=NULL)
 335     {
 336         free(data->buffer);
 337         data->buffer=NULL;
 338     }
 339
 340     snd_pcm_close(data->pcmHandle);
 341     free(data);
 342
 343     self->ExtraData = NULL;
 344 }
 345
 346 static ALCboolean qsa_reset_playback(PlaybackWrapper *self)
 347 {
 348     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 349     qsa_data *data = self->ExtraData;
 350     int32_t format=-1;
 351
 352     switch(device->FmtType)
 353     {
 354         case DevFmtByte:
 355              format=SND_PCM_SFMT_S8;
 356              break;
 357         case DevFmtUByte:
 358              format=SND_PCM_SFMT_U8;
 359              break;
 360         case DevFmtShort:
 361              format=SND_PCM_SFMT_S16_LE;
 362              break;
 363         case DevFmtUShort:
 364              format=SND_PCM_SFMT_U16_LE;
 365              break;
 366         case DevFmtInt:
 367              format=SND_PCM_SFMT_S32_LE;
 368              break;
 369         case DevFmtUInt:
 370              format=SND_PCM_SFMT_U32_LE;
 371              break;
 372         case DevFmtFloat:
 373              format=SND_PCM_SFMT_FLOAT_LE;
 374              break;
 375     }
 376
 377     /* we actually don't want to block on writes */
 378     snd_pcm_nonblock_mode(data->pcmHandle, 1);
 379     /* Disable mmap to control data transfer to the audio device */
 380     snd_pcm_plugin_set_disable(data->pcmHandle, PLUGIN_DISABLE_MMAP);
 381     snd_pcm_plugin_set_disable(data->pcmHandle, PLUGIN_DISABLE_BUFFER_PARTIAL_BLOCKS);
 382
 383     // configure a sound channel
 384     memset(&data->cparams, 0, sizeof(data->cparams));
 385     data->cparams.channel=SND_PCM_CHANNEL_PLAYBACK;
 386     data->cparams.mode=SND_PCM_MODE_BLOCK;
 387     data->cparams.start_mode=SND_PCM_START_FULL;
 388     data->cparams.stop_mode=SND_PCM_STOP_STOP;
 389
 390     data->cparams.buf.block.frag_size=device->UpdateSize *
 391         FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder);
 392     data->cparams.buf.block.frags_max=device->NumUpdates;
 393     data->cparams.buf.block.frags_min=device->NumUpdates;
 394
 395     data->cparams.format.interleave=1;
 396     data->cparams.format.rate=device->Frequency;
 397     data->cparams.format.voices=ChannelsFromDevFmt(device->FmtChans, device->AmbiOrder);
 398     data->cparams.format.format=format;
 399
 400     if ((snd_pcm_plugin_params(data->pcmHandle, &data->cparams))<0)
 401     {
 402         int original_rate=data->cparams.format.rate;
 403         int original_voices=data->cparams.format.voices;
 404         int original_format=data->cparams.format.format;
 405         int it;
 406         int jt;
 407
 408         for (it=0; it<1; it++)
 409         {
 410             /* Check for second pass */
 411             if (it==1)
 412             {
 413                 original_rate=ratelist[0].rate;
 414                 original_voices=channellist[0].channels;
 415                 original_format=formatlist[0].format;
 416             }
 417
 418             do {
 419                 /* At first downgrade sample format */
 420                 jt=0;
 421                 do {
 422                     if (formatlist[jt].format==data->cparams.format.format)
 423                     {
 424                         data->cparams.format.format=formatlist[jt+1].format;
 425                         break;
 426                     }
 427                     if (formatlist[jt].format==0)
 428                     {
 429                         data->cparams.format.format=0;
 430                         break;
 431                     }
 432                     jt++;
 433                 } while(1);
 434
 435                 if (data->cparams.format.format==0)
 436                 {
 437                     data->cparams.format.format=original_format;
 438
 439                     /* At secod downgrade sample rate */
 440                     jt=0;
 441                     do {
 442                         if (ratelist[jt].rate==data->cparams.format.rate)
 443                         {
 444                             data->cparams.format.rate=ratelist[jt+1].rate;
 445                             break;
 446                         }
 447                         if (ratelist[jt].rate==0)
 448                         {
 449                             data->cparams.format.rate=0;
 450                             break;
 451                         }
 452                         jt++;
 453                     } while(1);
 454
 455                     if (data->cparams.format.rate==0)
 456                     {
 457                         data->cparams.format.rate=original_rate;
 458                         data->cparams.format.format=original_format;
 459
 460                         /* At third downgrade channels number */
 461                         jt=0;
 462                         do {
 463                             if(channellist[jt].channels==data->cparams.format.voices)
 464                             {
 465                                 data->cparams.format.voices=channellist[jt+1].channels;
 466                                 break;
 467                             }
 468                             if (channellist[jt].channels==0)
 469                             {
 470                                 data->cparams.format.voices=0;
 471                                 break;
 472                             }
 473                            jt++;
 474                         } while(1);
 475                     }
 476
 477                     if (data->cparams.format.voices==0)
 478                     {
 479                         break;
 480                     }
 481                 }
 482
 483                 data->cparams.buf.block.frag_size=device->UpdateSize*
 484                     data->cparams.format.voices*
 485                     snd_pcm_format_width(data->cparams.format.format)/8;
 486                 data->cparams.buf.block.frags_max=device->NumUpdates;
 487                 data->cparams.buf.block.frags_min=device->NumUpdates;
 488                 if ((snd_pcm_plugin_params(data->pcmHandle, &data->cparams))<0)
 489                 {
 490                     continue;
 491                 }
 492                 else
 493                 {
 494                     break;
 495                 }
 496             } while(1);
 497
 498             if (data->cparams.format.voices!=0)
 499             {
 500                 break;
 501             }
 502         }
 503
 504         if (data->cparams.format.voices==0)
 505         {
 506             return ALC_FALSE;
 507         }
 508     }
 509
 510     if ((snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_PLAYBACK))<0)
 511     {
 512         return ALC_FALSE;
 513     }
 514
 515     memset(&data->csetup, 0, sizeof(data->csetup));
 516     data->csetup.channel=SND_PCM_CHANNEL_PLAYBACK;
 517     if (snd_pcm_plugin_setup(data->pcmHandle, &data->csetup)<0)
 518     {
 519         return ALC_FALSE;
 520     }
 521
 522     /* now fill back to the our AL device */
 523     device->Frequency=data->cparams.format.rate;
 524
 525     switch (data->cparams.format.voices)
 526     {
 527         case 1:
 528              device->FmtChans=DevFmtMono;
 529              break;
 530         case 2:
 531              device->FmtChans=DevFmtStereo;
 532              break;
 533         case 4:
 534              device->FmtChans=DevFmtQuad;
 535              break;
 536         case 6:
 537              device->FmtChans=DevFmtX51;
 538              break;
 539         case 7:
 540              device->FmtChans=DevFmtX61;
 541              break;
 542         case 8:
 543              device->FmtChans=DevFmtX71;
 544              break;
 545         default:
 546              device->FmtChans=DevFmtMono;
 547              break;
 548     }
 549
 550     switch (data->cparams.format.format)
 551     {
 552         case SND_PCM_SFMT_S8:
 553              device->FmtType=DevFmtByte;
 554              break;
 555         case SND_PCM_SFMT_U8:
 556              device->FmtType=DevFmtUByte;
 557              break;
 558         case SND_PCM_SFMT_S16_LE:
 559              device->FmtType=DevFmtShort;
 560              break;
 561         case SND_PCM_SFMT_U16_LE:
 562              device->FmtType=DevFmtUShort;
 563              break;
 564         case SND_PCM_SFMT_S32_LE:
 565              device->FmtType=DevFmtInt;
 566              break;
 567         case SND_PCM_SFMT_U32_LE:
 568              device->FmtType=DevFmtUInt;
 569              break;
 570         case SND_PCM_SFMT_FLOAT_LE:
 571              device->FmtType=DevFmtFloat;
 572              break;
 573         default:
 574              device->FmtType=DevFmtShort;
 575              break;
 576     }
 577
 578     SetDefaultChannelOrder(device);
 579
 580     device->UpdateSize=data->csetup.buf.block.frag_size/
 581         FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder);
 582     device->NumUpdates=data->csetup.buf.block.frags;
 583
 584     data->size=data->csetup.buf.block.frag_size;
 585     data->buffer=malloc(data->size);
 586     if (!data->buffer)
 587     {
 588         return ALC_FALSE;
 589     }
 590
 591     return ALC_TRUE;
 592 }
 593
 594 static ALCboolean qsa_start_playback(PlaybackWrapper *self)
 595 {
 596     qsa_data *data = self->ExtraData;
 597
 598     data->killNow = 0;
 599     if(althrd_create(&data->thread, qsa_proc_playback, self) != althrd_success)
 600         return ALC_FALSE;
 601
 602     return ALC_TRUE;
 603 }
 604
 605 static void qsa_stop_playback(PlaybackWrapper *self)
 606 {
 607     qsa_data *data = self->ExtraData;
 608     int res;
 609
 610     if(data->killNow)
 611         return;
 612
 613     data->killNow = 1;
 614     althrd_join(data->thread, &res);
 615 }
 616
 617
 618 static void PlaybackWrapper_Construct(PlaybackWrapper *self, ALCdevice *device)
 619 {
 620     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 621     SET_VTABLE2(PlaybackWrapper, ALCbackend, self);
 622
 623     self->ExtraData = NULL;
 624 }
 625
 626 static void PlaybackWrapper_Destruct(PlaybackWrapper *self)
 627 {
 628     if(self->ExtraData)
 629         qsa_close_playback(self);
 630
 631     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
 632 }
 633
 634 static ALCenum PlaybackWrapper_open(PlaybackWrapper *self, const ALCchar *name)
 635 {
 636     return qsa_open_playback(self, name);
 637 }
 638
 639 static ALCboolean PlaybackWrapper_reset(PlaybackWrapper *self)
 640 {
 641     return qsa_reset_playback(self);
 642 }
 643
 644 static ALCboolean PlaybackWrapper_start(PlaybackWrapper *self)
 645 {
 646     return qsa_start_playback(self);
 647 }
 648
 649 static void PlaybackWrapper_stop(PlaybackWrapper *self)
 650 {
 651     qsa_stop_playback(self);
 652 }
 653
 654
 655
 656 /***********/
 657 /* Capture */
 658 /***********/
 659
 660 typedef struct CaptureWrapper {
 661     DERIVE_FROM_TYPE(ALCbackend);
 662     qsa_data *ExtraData;
 663 } CaptureWrapper;
 664
 665 static void CaptureWrapper_Construct(CaptureWrapper *self, ALCdevice *device);
 666 static void CaptureWrapper_Destruct(CaptureWrapper *self);
 667 static ALCenum CaptureWrapper_open(CaptureWrapper *self, const ALCchar *name);
 668 static DECLARE_FORWARD(CaptureWrapper, ALCbackend, ALCboolean, reset)
 669 static ALCboolean CaptureWrapper_start(CaptureWrapper *self);
 670 static void CaptureWrapper_stop(CaptureWrapper *self);
 671 static ALCenum CaptureWrapper_captureSamples(CaptureWrapper *self, void *buffer, ALCuint samples);
 672 static ALCuint CaptureWrapper_availableSamples(CaptureWrapper *self);
 673 static DECLARE_FORWARD(CaptureWrapper, ALCbackend, ClockLatency, getClockLatency)
 674 static DECLARE_FORWARD(CaptureWrapper, ALCbackend, void, lock)
 675 static DECLARE_FORWARD(CaptureWrapper, ALCbackend, void, unlock)
 676 DECLARE_DEFAULT_ALLOCATORS(CaptureWrapper)
 677 DEFINE_ALCBACKEND_VTABLE(CaptureWrapper);
 678
 679
 680 static ALCenum qsa_open_capture(CaptureWrapper *self, const ALCchar *deviceName)
 681 {
 682     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 683     qsa_data *data;
 684     int card, dev;
 685     int format=-1;
 686     int status;
 687
 688     data=(qsa_data*)calloc(1, sizeof(qsa_data));
 689     if (data==NULL)
 690     {
 691         return ALC_OUT_OF_MEMORY;
 692     }
 693
 694     if(!deviceName)
 695         deviceName = qsaDevice;
 696
 697     if(strcmp(deviceName, qsaDevice) == 0)
 698         status = snd_pcm_open_preferred(&data->pcmHandle, &card, &dev, SND_PCM_OPEN_CAPTURE);
 699     else
 700     {
 701         const DevMap *iter;
 702
 703         if(VECTOR_SIZE(CaptureNameMap) == 0)
 704             deviceList(SND_PCM_CHANNEL_CAPTURE, &CaptureNameMap);
 705
 706 #define MATCH_DEVNAME(iter) ((iter)->name && strcmp(deviceName, (iter)->name)==0)
 707         VECTOR_FIND_IF(iter, const DevMap, CaptureNameMap, MATCH_DEVNAME);
 708 #undef MATCH_DEVNAME
 709         if(iter == VECTOR_END(CaptureNameMap))
 710         {
 711             free(data);
 712             return ALC_INVALID_DEVICE;
 713         }
 714
 715         status = snd_pcm_open(&data->pcmHandle, iter->card, iter->dev, SND_PCM_OPEN_CAPTURE);
 716     }
 717
 718     if(status < 0)
 719     {
 720         free(data);
 721         return ALC_INVALID_DEVICE;
 722     }
 723
 724     data->audio_fd = snd_pcm_file_descriptor(data->pcmHandle, SND_PCM_CHANNEL_CAPTURE);
 725     if(data->audio_fd < 0)
 726     {
 727         snd_pcm_close(data->pcmHandle);
 728         free(data);
 729         return ALC_INVALID_DEVICE;
 730     }
 731
 732     alstr_copy_cstr(&device->DeviceName, deviceName);
 733     self->ExtraData = data;
 734
 735     switch (device->FmtType)
 736     {
 737         case DevFmtByte:
 738              format=SND_PCM_SFMT_S8;
 739              break;
 740         case DevFmtUByte:
 741              format=SND_PCM_SFMT_U8;
 742              break;
 743         case DevFmtShort:
 744              format=SND_PCM_SFMT_S16_LE;
 745              break;
 746         case DevFmtUShort:
 747              format=SND_PCM_SFMT_U16_LE;
 748              break;
 749         case DevFmtInt:
 750              format=SND_PCM_SFMT_S32_LE;
 751              break;
 752         case DevFmtUInt:
 753              format=SND_PCM_SFMT_U32_LE;
 754              break;
 755         case DevFmtFloat:
 756              format=SND_PCM_SFMT_FLOAT_LE;
 757              break;
 758     }
 759
 760     /* we actually don't want to block on reads */
 761     snd_pcm_nonblock_mode(data->pcmHandle, 1);
 762     /* Disable mmap to control data transfer to the audio device */
 763     snd_pcm_plugin_set_disable(data->pcmHandle, PLUGIN_DISABLE_MMAP);
 764
 765     /* configure a sound channel */
 766     memset(&data->cparams, 0, sizeof(data->cparams));
 767     data->cparams.mode=SND_PCM_MODE_BLOCK;
 768     data->cparams.channel=SND_PCM_CHANNEL_CAPTURE;
 769     data->cparams.start_mode=SND_PCM_START_GO;
 770     data->cparams.stop_mode=SND_PCM_STOP_STOP;
 771
 772     data->cparams.buf.block.frag_size=device->UpdateSize*
 773         FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder);
 774     data->cparams.buf.block.frags_max=device->NumUpdates;
 775     data->cparams.buf.block.frags_min=device->NumUpdates;
 776
 777     data->cparams.format.interleave=1;
 778     data->cparams.format.rate=device->Frequency;
 779     data->cparams.format.voices=ChannelsFromDevFmt(device->FmtChans, device->AmbiOrder);
 780     data->cparams.format.format=format;
 781
 782     if(snd_pcm_plugin_params(data->pcmHandle, &data->cparams) < 0)
 783     {
 784         snd_pcm_close(data->pcmHandle);
 785         free(data);
 786
 787         return ALC_INVALID_VALUE;
 788     }
 789
 790     return ALC_NO_ERROR;
 791 }
 792
 793 static void qsa_close_capture(CaptureWrapper *self)
 794 {
 795     qsa_data *data = self->ExtraData;
 796
 797     if (data->pcmHandle!=NULL)
 798         snd_pcm_close(data->pcmHandle);
 799
 800     free(data);
 801     self->ExtraData = NULL;
 802 }
 803
 804 static void qsa_start_capture(CaptureWrapper *self)
 805 {
 806     qsa_data *data = self->ExtraData;
 807     int rstatus;
 808
 809     if ((rstatus=snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_CAPTURE))<0)
 810     {
 811         ERR("capture prepare failed: %s\n", snd_strerror(rstatus));
 812         return;
 813     }
 814
 815     memset(&data->csetup, 0, sizeof(data->csetup));
 816     data->csetup.channel=SND_PCM_CHANNEL_CAPTURE;
 817     if ((rstatus=snd_pcm_plugin_setup(data->pcmHandle, &data->csetup))<0)
 818     {
 819         ERR("capture setup failed: %s\n", snd_strerror(rstatus));
 820         return;
 821     }
 822
 823     snd_pcm_capture_go(data->pcmHandle);
 824 }
 825
 826 static void qsa_stop_capture(CaptureWrapper *self)
 827 {
 828     qsa_data *data = self->ExtraData;
 829     snd_pcm_capture_flush(data->pcmHandle);
 830 }
 831
 832 static ALCuint qsa_available_samples(CaptureWrapper *self)
 833 {
 834     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 835     qsa_data *data = self->ExtraData;
 836     snd_pcm_channel_status_t status;
 837     ALint frame_size = FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder);
 838     ALint free_size;
 839     int rstatus;
 840
 841     memset(&status, 0, sizeof (status));
 842     status.channel=SND_PCM_CHANNEL_CAPTURE;
 843     snd_pcm_plugin_status(data->pcmHandle, &status);
 844     if ((status.status==SND_PCM_STATUS_OVERRUN) ||
 845         (status.status==SND_PCM_STATUS_READY))
 846     {
 847         if ((rstatus=snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_CAPTURE))<0)
 848         {
 849             ERR("capture prepare failed: %s\n", snd_strerror(rstatus));
 850             aluHandleDisconnect(device);
 851             return 0;
 852         }
 853
 854         snd_pcm_capture_go(data->pcmHandle);
 855         return 0;
 856     }
 857
 858     free_size=data->csetup.buf.block.frag_size*data->csetup.buf.block.frags;
 859     free_size-=status.free;
 860
 861     return free_size/frame_size;
 862 }
 863
 864 static ALCenum qsa_capture_samples(CaptureWrapper *self, ALCvoid *buffer, ALCuint samples)
 865 {
 866     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 867     qsa_data *data = self->ExtraData;
 868     char* read_ptr;
 869     snd_pcm_channel_status_t status;
 870     fd_set rfds;
 871     int selectret;
 872     struct timeval timeout;
 873     int bytes_read;
 874     ALint frame_size=FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder);
 875     ALint len=samples*frame_size;
 876     int rstatus;
 877
 878     read_ptr=buffer;
 879
 880     while (len>0)
 881     {
 882         FD_ZERO(&rfds);
 883         FD_SET(data->audio_fd, &rfds);
 884         timeout.tv_sec=2;
 885         timeout.tv_usec=0;
 886
 887         /* Select also works like time slice to OS */
 888         bytes_read=0;
 889         selectret=select(data->audio_fd+1, &rfds, NULL, NULL, &timeout);
 890         switch (selectret)
 891         {
 892             case -1:
 893                  aluHandleDisconnect(device);
 894                  return ALC_INVALID_DEVICE;
 895             case 0:
 896                  break;
 897             default:
 898                  if (FD_ISSET(data->audio_fd, &rfds))
 899                  {
 900                      bytes_read=snd_pcm_plugin_read(data->pcmHandle, read_ptr, len);
 901                      break;
 902                  }
 903                  break;
 904         }
 905
 906         if (bytes_read<=0)
 907         {
 908             if ((errno==EAGAIN) || (errno==EWOULDBLOCK))
 909             {
 910                 continue;
 911             }
 912
 913             memset(&status, 0, sizeof (status));
 914             status.channel=SND_PCM_CHANNEL_CAPTURE;
 915             snd_pcm_plugin_status(data->pcmHandle, &status);
 916
 917             /* we need to reinitialize the sound channel if we've overrun the buffer */
 918             if ((status.status==SND_PCM_STATUS_OVERRUN) ||
 919                 (status.status==SND_PCM_STATUS_READY))
 920             {
 921                 if ((rstatus=snd_pcm_plugin_prepare(data->pcmHandle, SND_PCM_CHANNEL_CAPTURE))<0)
 922                 {
 923                     ERR("capture prepare failed: %s\n", snd_strerror(rstatus));
 924                     aluHandleDisconnect(device);
 925                     return ALC_INVALID_DEVICE;
 926                 }
 927                 snd_pcm_capture_go(data->pcmHandle);
 928             }
 929         }
 930         else
 931         {
 932             read_ptr+=bytes_read;
 933             len-=bytes_read;
 934         }
 935     }
 936
 937     return ALC_NO_ERROR;
 938 }
 939
 940
 941 static void CaptureWrapper_Construct(CaptureWrapper *self, ALCdevice *device)
 942 {
 943     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 944     SET_VTABLE2(CaptureWrapper, ALCbackend, self);
 945
 946     self->ExtraData = NULL;
 947 }
 948
 949 static void CaptureWrapper_Destruct(CaptureWrapper *self)
 950 {
 951     if(self->ExtraData)
 952         qsa_close_capture(self);
 953
 954     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
 955 }
 956
 957 static ALCenum CaptureWrapper_open(CaptureWrapper *self, const ALCchar *name)
 958 {
 959     return qsa_open_capture(self, name);
 960 }
 961
 962 static ALCboolean CaptureWrapper_start(CaptureWrapper *self)
 963 {
 964     qsa_start_capture(self);
 965     return ALC_TRUE;
 966 }
 967
 968 static void CaptureWrapper_stop(CaptureWrapper *self)
 969 {
 970     qsa_stop_capture(self);
 971 }
 972
 973 static ALCenum CaptureWrapper_captureSamples(CaptureWrapper *self, void *buffer, ALCuint samples)
 974 {
 975     return qsa_capture_samples(self, buffer, samples);
 976 }
 977
 978 static ALCuint CaptureWrapper_availableSamples(CaptureWrapper *self)
 979 {
 980     return qsa_available_samples(self);
 981 }
 982
 983
 984 typedef struct ALCqsaBackendFactory {
 985     DERIVE_FROM_TYPE(ALCbackendFactory);
 986 } ALCqsaBackendFactory;
 987 #define ALCQSABACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCqsaBackendFactory, ALCbackendFactory) } }
 988
 989 static ALCboolean ALCqsaBackendFactory_init(ALCqsaBackendFactory* UNUSED(self));
 990 static void ALCqsaBackendFactory_deinit(ALCqsaBackendFactory* UNUSED(self));
 991 static ALCboolean ALCqsaBackendFactory_querySupport(ALCqsaBackendFactory* UNUSED(self), ALCbackend_Type type);
 992 static void ALCqsaBackendFactory_probe(ALCqsaBackendFactory* UNUSED(self), enum DevProbe type);
 993 static ALCbackend* ALCqsaBackendFactory_createBackend(ALCqsaBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type);
 994 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCqsaBackendFactory);
 995
 996 static ALCboolean ALCqsaBackendFactory_init(ALCqsaBackendFactory* UNUSED(self))
 997 {
 998     return ALC_TRUE;
 999 }
1000
1001 static void ALCqsaBackendFactory_deinit(ALCqsaBackendFactory* UNUSED(self))
1002 {
1003 #define FREE_NAME(iter) free((iter)->name)
1004     VECTOR_FOR_EACH(DevMap, DeviceNameMap, FREE_NAME);
1005     VECTOR_DEINIT(DeviceNameMap);
1006
1007     VECTOR_FOR_EACH(DevMap, CaptureNameMap, FREE_NAME);
1008     VECTOR_DEINIT(CaptureNameMap);
1009 #undef FREE_NAME
1010 }
1011
1012 static ALCboolean ALCqsaBackendFactory_querySupport(ALCqsaBackendFactory* UNUSED(self), ALCbackend_Type type)
1013 {
1014     if(type == ALCbackend_Playback || type == ALCbackend_Capture)
1015         return ALC_TRUE;
1016     return ALC_FALSE;
1017 }
1018
1019 static void ALCqsaBackendFactory_probe(ALCqsaBackendFactory* UNUSED(self), enum DevProbe type)
1020 {
1021     switch (type)
1022     {
1023         case ALL_DEVICE_PROBE:
1024 #define FREE_NAME(iter) free((iter)->name)
1025             VECTOR_FOR_EACH(DevMap, DeviceNameMap, FREE_NAME);
1026             VECTOR_RESIZE(DeviceNameMap, 0, 0);
1027 #undef FREE_NAME
1028
1029             deviceList(SND_PCM_CHANNEL_PLAYBACK, &DeviceNameMap);
1030 #define APPEND_DEVICE(iter) AppendAllDevicesList((iter)->name)
1031             VECTOR_FOR_EACH(const DevMap, DeviceNameMap, APPEND_DEVICE);
1032 #undef APPEND_DEVICE
1033             break;
1034
1035         case CAPTURE_DEVICE_PROBE:
1036 #define FREE_NAME(iter) free((iter)->name)
1037             VECTOR_FOR_EACH(DevMap, CaptureNameMap, FREE_NAME);
1038             VECTOR_RESIZE(CaptureNameMap, 0, 0);
1039 #undef FREE_NAME
1040
1041             deviceList(SND_PCM_CHANNEL_CAPTURE, &CaptureNameMap);
1042 #define APPEND_DEVICE(iter) AppendCaptureDeviceList((iter)->name)
1043             VECTOR_FOR_EACH(const DevMap, CaptureNameMap, APPEND_DEVICE);
1044 #undef APPEND_DEVICE
1045             break;
1046     }
1047 }
1048
1049 static ALCbackend* ALCqsaBackendFactory_createBackend(ALCqsaBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
1050 {
1051     if(type == ALCbackend_Playback)
1052     {
1053         PlaybackWrapper *backend;
1054         NEW_OBJ(backend, PlaybackWrapper)(device);
1055         if(!backend) return NULL;
1056         return STATIC_CAST(ALCbackend, backend);
1057     }
1058     if(type == ALCbackend_Capture)
1059     {
1060         CaptureWrapper *backend;
1061         NEW_OBJ(backend, CaptureWrapper)(device);
1062         if(!backend) return NULL;
1063         return STATIC_CAST(ALCbackend, backend);
1064     }
1065
1066     return NULL;
1067 }
1068
1069 ALCbackendFactory *ALCqsaBackendFactory_getFactory(void)
1070 {
1071     static ALCqsaBackendFactory factory = ALCQSABACKENDFACTORY_INITIALIZER;
1072     return STATIC_CAST(ALCbackendFactory, &factory);
1073 }