src/unix/sound.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sound.cpp
   3 // Purpose:     wxSound
   4 // Author:      Marcel Rasche, Vaclav Slavik
   5 // Modified by:
   6 // Created:     25/10/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart, Open Source Applications Foundation
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "sound.h"
  14 #pragma implementation "soundbase.h"
  15 #endif
  16
  17 // for compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #include "wx/setup.h"
  21
  22 #if defined(__BORLANDC__)
  23 #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_SOUND
  27
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31 #include <sys/ioctl.h>
  32
  33 #ifdef HAVE_SYS_SOUNDCARD_H
  34 #include <sys/soundcard.h>
  35 #endif
  36
  37 #ifndef WX_PRECOMP
  38     #include "wx/event.h"
  39     #include "wx/intl.h"
  40     #include "wx/log.h"
  41 #endif
  42
  43 #include "wx/thread.h"
  44 #include "wx/file.h"
  45 #include "wx/module.h"
  46 #include "wx/sound.h"
  47 #include "wx/dynlib.h"
  48
  49
  50 #if wxUSE_THREADS
  51 // mutex for all wxSound's synchronization
  52 static wxMutex gs_soundMutex;
  53 #endif
  54
  55 // ----------------------------------------------------------------------------
  56 // wxSoundData
  57 // ----------------------------------------------------------------------------
  58
  59 void wxSoundData::IncRef()
  60 {
  61 #if wxUSE_THREADS
  62     wxMutexLocker locker(gs_soundMutex);
  63 #endif
  64     m_refCnt++;
  65 }
  66
  67 void wxSoundData::DecRef()
  68 {
  69 #if wxUSE_THREADS
  70     wxMutexLocker locker(gs_soundMutex);
  71 #endif
  72     if (--m_refCnt == 0)
  73         delete this;
  74 }
  75
  76 wxSoundData::~wxSoundData()
  77 {
  78     delete[] m_dataWithHeader;
  79 }
  80
  81
  82 // ----------------------------------------------------------------------------
  83 // wxSoundBackendNull, used in absence of audio API or card
  84 // ----------------------------------------------------------------------------
  85
  86 class wxSoundBackendNull : public wxSoundBackend
  87 {
  88 public:
  89     wxString GetName() const { return _("No sound"); }
  90     int GetPriority() const { return 0; }
  91     bool IsAvailable() const { return true; }
  92     bool HasNativeAsyncPlayback() const { return true; }
  93     bool Play(wxSoundData *WXUNUSED(data), unsigned WXUNUSED(flags),
  94               volatile wxSoundPlaybackStatus *WXUNUSED(status))
  95         { return true; }
  96     void Stop() {}
  97     bool IsPlaying() const { return false; }
  98 };
  99
 100
 101 // ----------------------------------------------------------------------------
 102 // wxSoundBackendOSS, for Linux
 103 // ----------------------------------------------------------------------------
 104
 105 #ifdef HAVE_SYS_SOUNDCARD_H
 106
 107 #ifndef AUDIODEV
 108 #define AUDIODEV   "/dev/dsp"    // Default path for audio device
 109 #endif
 110
 111 class wxSoundBackendOSS : public wxSoundBackend
 112 {
 113 public:
 114     wxString GetName() const { return _T("Open Sound System"); }
 115     int GetPriority() const { return 10; }
 116     bool IsAvailable() const;
 117     bool HasNativeAsyncPlayback() const { return false; }
 118     bool Play(wxSoundData *data, unsigned flags,
 119               volatile wxSoundPlaybackStatus *status);
 120     void Stop() {}
 121     bool IsPlaying() const { return false; }
 122
 123 private:
 124     int OpenDSP(const wxSoundData *data);
 125     bool InitDSP(int dev, const wxSoundData *data);
 126
 127     int m_DSPblkSize;        // Size of the DSP buffer
 128     bool m_needConversion;
 129 };
 130
 131 bool wxSoundBackendOSS::IsAvailable() const
 132 {
 133     int fd;
 134     fd = open(AUDIODEV, O_WRONLY | O_NONBLOCK);
 135     if (fd < 0)
 136         return false;
 137     close(fd);
 138     return true;
 139 }
 140
 141 bool wxSoundBackendOSS::Play(wxSoundData *data, unsigned flags,
 142                              volatile wxSoundPlaybackStatus *status)
 143 {
 144     int dev = OpenDSP(data);
 145
 146     if (dev < 0)
 147         return false;
 148
 149     ioctl(dev, SNDCTL_DSP_SYNC, 0);
 150
 151     do
 152     {
 153         bool play = true;
 154         int i;
 155         unsigned l = 0;
 156         size_t datasize = data->m_dataBytes;
 157
 158         do
 159         {
 160             if (status->m_stopRequested)
 161             {
 162                 wxLogTrace(_T("sound"), _T("playback stopped"));
 163                 close(dev);
 164                 return true;
 165             }
 166
 167             i= (int)((l + m_DSPblkSize) < datasize ?
 168                      m_DSPblkSize : (datasize - l));
 169             if (write(dev, &data->m_data[l], i) != i)
 170             {
 171                 play = false;
 172             }
 173             l += i;
 174         } while (play && l < datasize);
 175     } while (flags & wxSOUND_LOOP);
 176
 177     close(dev);
 178     return true;
 179 }
 180
 181 int wxSoundBackendOSS::OpenDSP(const wxSoundData *data)
 182 {
 183     int dev = -1;
 184
 185     if ((dev = open(AUDIODEV, O_WRONLY, 0)) <0)
 186         return -1;
 187
 188     if (!InitDSP(dev, data) || m_needConversion)
 189     {
 190         close(dev);
 191         return -1;
 192     }
 193
 194     return dev;
 195 }
 196
 197
 198 bool wxSoundBackendOSS::InitDSP(int dev, const wxSoundData *data)
 199 {
 200     unsigned tmp;
 201
 202     // Reset the dsp
 203     if (ioctl(dev, SNDCTL_DSP_RESET, 0) < 0)
 204     {
 205         wxLogTrace(_T("sound"), _T("unable to reset dsp"));
 206         return false;
 207     }
 208
 209     m_needConversion = false;
 210
 211     tmp = data->m_bitsPerSample;
 212     if (ioctl(dev, SNDCTL_DSP_SAMPLESIZE, &tmp) < 0)
 213     {
 214         wxLogTrace(_T("sound"), _T("IOCTL failure (SNDCTL_DSP_SAMPLESIZE)"));
 215         return false;
 216     }
 217     if (tmp != data->m_bitsPerSample)
 218     {
 219         wxLogTrace(_T("sound"),
 220                    _T("Unable to set DSP sample size to %d (wants %d)"),
 221                    data->m_bitsPerSample, tmp);
 222         m_needConversion = true;
 223     }
 224
 225     unsigned stereo = data->m_channels == 1 ? 0 : 1;
 226     tmp = stereo;
 227     if (ioctl(dev, SNDCTL_DSP_STEREO, &tmp) < 0)
 228     {
 229         wxLogTrace(_T("sound"), _T("IOCTL failure (SNDCTL_DSP_STEREO)"));
 230         return false;
 231     }
 232     if (tmp != stereo)
 233     {
 234         wxLogTrace(_T("sound"), _T("Unable to set DSP to %s."), stereo?  _T("stereo"):_T("mono"));
 235         m_needConversion = true;
 236     }
 237
 238     tmp = data->m_samplingRate;
 239     if (ioctl(dev, SNDCTL_DSP_SPEED, &tmp) < 0)
 240     {
 241         wxLogTrace(_T("sound"), _T("IOCTL failure (SNDCTL_DSP_SPEED)"));
 242        return false;
 243     }
 244     if (tmp != data->m_samplingRate)
 245     {
 246         // If the rate the sound card is using is not within 1% of what the
 247         // data specified then override the data setting.  The only reason not
 248         // to always override this is because of clock-rounding
 249         // problems. Sound cards will sometimes use things like 44101 when you
 250         // ask for 44100.  No need overriding this and having strange output
 251         // file rates for something that we can't hear anyways.
 252         if (data->m_samplingRate - tmp > (tmp * .01) ||
 253             tmp - data->m_samplingRate > (tmp * .01)) {
 254             wxLogTrace(_T("sound"),
 255                        _T("Unable to set DSP sampling rate to %d (wants %d)"),
 256                        data->m_samplingRate, tmp);
 257             m_needConversion = true;
 258         }
 259     }
 260
 261     // Do this last because some drivers can adjust the buffer sized based on
 262     // the sampling rate, etc.
 263     if (ioctl(dev, SNDCTL_DSP_GETBLKSIZE, &m_DSPblkSize) < 0)
 264     {
 265         wxLogTrace(_T("sound"), _T("IOCTL failure (SNDCTL_DSP_GETBLKSIZE)"));
 266         return false;
 267     }
 268     return true;
 269 }
 270
 271 #endif // HAVE_SYS_SOUNDCARD_H
 272
 273 // ----------------------------------------------------------------------------
 274 // wxSoundSyncOnlyAdaptor
 275 // ----------------------------------------------------------------------------
 276
 277 #if wxUSE_THREADS
 278
 279 class wxSoundSyncOnlyAdaptor;
 280
 281 // this class manages asynchronous playback of audio if the backend doesn't
 282 // support it natively (e.g. OSS backend)
 283 class wxSoundAsyncPlaybackThread : public wxThread
 284 {
 285 public:
 286     wxSoundAsyncPlaybackThread(wxSoundSyncOnlyAdaptor *adaptor,
 287                               wxSoundData *data, unsigned flags)
 288         : wxThread(), m_adapt(adaptor), m_data(data), m_flags(flags) {}
 289     virtual ExitCode Entry();
 290
 291 protected:
 292     wxSoundSyncOnlyAdaptor *m_adapt;
 293     wxSoundData *m_data;
 294     unsigned m_flags;
 295 };
 296
 297 #endif // wxUSE_THREADS
 298
 299 // This class turns wxSoundBackend that doesn't support asynchronous playback
 300 // into one that does
 301 class wxSoundSyncOnlyAdaptor : public wxSoundBackend
 302 {
 303 public:
 304     wxSoundSyncOnlyAdaptor(wxSoundBackend *backend)
 305         : m_backend(backend), m_playing(false) {}
 306     ~wxSoundSyncOnlyAdaptor()
 307     {
 308         delete m_backend;
 309     }
 310     wxString GetName() const
 311     {
 312         return m_backend->GetName();
 313     }
 314     int GetPriority() const
 315     {
 316         return m_backend->GetPriority();
 317     }
 318     bool IsAvailable() const
 319     {
 320         return m_backend->IsAvailable();
 321     }
 322     bool HasNativeAsyncPlayback() const
 323     {
 324         return true;
 325     }
 326     bool Play(wxSoundData *data, unsigned flags,
 327               volatile wxSoundPlaybackStatus *status);
 328     void Stop();
 329     bool IsPlaying() const;
 330
 331 private:
 332     friend class wxSoundAsyncPlaybackThread;
 333
 334     wxSoundBackend *m_backend;
 335     bool m_playing;
 336 #if wxUSE_THREADS
 337     // player thread holds this mutex and releases it after it finishes
 338     // playing, so that the main thread knows when it can play sound
 339     wxMutex m_mutexRightToPlay;
 340     wxSoundPlaybackStatus m_status;
 341 #endif
 342 };
 343
 344
 345 #if wxUSE_THREADS
 346 wxThread::ExitCode wxSoundAsyncPlaybackThread::Entry()
 347 {
 348     m_adapt->m_backend->Play(m_data, m_flags & ~wxSOUND_ASYNC,
 349                              &m_adapt->m_status);
 350
 351     m_data->DecRef();
 352     m_adapt->m_playing = false;
 353     m_adapt->m_mutexRightToPlay.Unlock();
 354     wxLogTrace(_T("sound"), _T("terminated async playback thread"));
 355     return 0;
 356 }
 357 #endif
 358
 359 bool wxSoundSyncOnlyAdaptor::Play(wxSoundData *data, unsigned flags,
 360                                   volatile wxSoundPlaybackStatus *status)
 361 {
 362     Stop();
 363     if (flags & wxSOUND_ASYNC)
 364     {
 365 #if wxUSE_THREADS
 366         m_mutexRightToPlay.Lock();
 367         m_status.m_playing = true;
 368         m_status.m_stopRequested = false;
 369         data->IncRef();
 370         wxThread *th = new wxSoundAsyncPlaybackThread(this, data, flags);
 371         th->Create();
 372         th->Run();
 373         wxLogTrace(_T("sound"), _T("launched async playback thread"));
 374         return true;
 375 #else
 376         wxLogError(_("Unable to play sound asynchronously."));
 377         return false;
 378 #endif
 379     }
 380     else
 381     {
 382 #if wxUSE_THREADS
 383         m_mutexRightToPlay.Lock();
 384 #endif
 385         bool rv = m_backend->Play(data, flags, status);
 386 #if wxUSE_THREADS
 387         m_mutexRightToPlay.Unlock();
 388 #endif
 389         return rv;
 390     }
 391 }
 392
 393 void wxSoundSyncOnlyAdaptor::Stop()
 394 {
 395     wxLogTrace(_T("sound"), _T("asking audio to stop"));
 396
 397 #if wxUSE_THREADS
 398     // tell the player thread (if running) to stop playback ASAP:
 399     m_status.m_stopRequested = true;
 400
 401     // acquire the mutex to be sure no sound is being played, then
 402     // release it because we don't need it for anything (the effect of this
 403     // is that calling thread will wait until playback thread reacts to
 404     // our request to interrupt playback):
 405     m_mutexRightToPlay.Lock();
 406     m_mutexRightToPlay.Unlock();
 407     wxLogTrace(_T("sound"), _T("audio was stopped"));
 408 #endif
 409 }
 410
 411 bool wxSoundSyncOnlyAdaptor::IsPlaying() const
 412 {
 413 #if wxUSE_THREADS
 414     return m_status.m_playing;
 415 #else
 416     return false;
 417 #endif
 418 }
 419
 420
 421 // ----------------------------------------------------------------------------
 422 // wxSound
 423 // ----------------------------------------------------------------------------
 424
 425 wxSoundBackend *wxSound::ms_backend = NULL;
 426
 427 // FIXME - temporary, until we have plugins architecture
 428 #if wxUSE_LIBSDL
 429     #if wxUSE_PLUGINS
 430         wxDynamicLibrary *wxSound::ms_backendSDL = NULL;
 431     #else
 432         extern "C" wxSoundBackend *wxCreateSoundBackendSDL();
 433     #endif
 434 #endif
 435
 436 wxSound::wxSound() : m_data(NULL)
 437 {
 438 }
 439
 440 wxSound::wxSound(const wxString& sFileName, bool isResource) : m_data(NULL)
 441 {
 442     Create(sFileName, isResource);
 443 }
 444
 445 wxSound::wxSound(int size, const wxByte* data) : m_data(NULL)
 446 {
 447     Create(size, data);
 448 }
 449
 450 wxSound::~wxSound()
 451 {
 452     Free();
 453 }
 454
 455 bool wxSound::Create(const wxString& fileName, bool isResource)
 456 {
 457     wxASSERT_MSG( !isResource,
 458              _T("Loading sound from resources is only supported on Windows") );
 459
 460     Free();
 461
 462     wxFile fileWave;
 463     if (!fileWave.Open(fileName, wxFile::read))
 464     {
 465         return false;
 466     }
 467
 468     wxFileOffset len = fileWave.Length();
 469     wxUint8 *data = new wxUint8[len];
 470     if (fileWave.Read(data, len) != len)
 471     {
 472         wxLogError(_("Couldn't load sound data from '%s'."), fileName.c_str());
 473         return false;
 474     }
 475
 476     if (!LoadWAV(data, len, false))
 477     {
 478         wxLogError(_("Sound file '%s' is in unsupported format."),
 479                    fileName.c_str());
 480         return false;
 481     }
 482
 483     return true;
 484 }
 485
 486 bool wxSound::Create(int size, const wxByte* data)
 487 {
 488     wxASSERT( data != NULL );
 489
 490     Free();
 491     if (!LoadWAV(data, size, true))
 492     {
 493         wxLogError(_("Sound data are in unsupported format."));
 494         return false;
 495     }
 496     return true;
 497 }
 498
 499 /*static*/ void wxSound::EnsureBackend()
 500 {
 501     if (!ms_backend)
 502     {
 503         // FIXME -- make this fully dynamic when plugins architecture is in
 504         // place
 505 #if wxUSE_LIBSDL
 506         //if (!ms_backend)
 507         {
 508 #if !wxUSE_PLUGINS
 509             ms_backend = wxCreateSoundBackendSDL();
 510 #else
 511             wxString dllname;
 512             dllname.Printf(_T("%s/%s"),
 513                 wxDynamicLibrary::GetPluginsDirectory().c_str(),
 514                 wxDynamicLibrary::CanonicalizePluginName(
 515                     _T("sound_sdl"), wxDL_PLUGIN_BASE).c_str());
 516             wxLogTrace(_T("sound"),
 517                        _T("trying to load SDL plugin from '%s'..."),
 518                        dllname.c_str());
 519             wxLogNull null;
 520             ms_backendSDL = new wxDynamicLibrary(dllname, wxDL_NOW);
 521             if (!ms_backendSDL->IsLoaded())
 522             {
 523                 wxDELETE(ms_backendSDL);
 524             }
 525             else
 526             {
 527                 typedef wxSoundBackend *(*wxCreateSoundBackend_t)();
 528                 wxDYNLIB_FUNCTION(wxCreateSoundBackend_t,
 529                                   wxCreateSoundBackendSDL, *ms_backendSDL);
 530                 if (pfnwxCreateSoundBackendSDL)
 531                 {
 532                     ms_backend = (*pfnwxCreateSoundBackendSDL)();
 533                 }
 534             }
 535 #endif
 536             if (ms_backend && !ms_backend->IsAvailable())
 537             {
 538                 wxDELETE(ms_backend);
 539             }
 540         }
 541 #endif
 542
 543 #ifdef HAVE_SYS_SOUNDCARD_H
 544         if (!ms_backend)
 545         {
 546             ms_backend = new wxSoundBackendOSS();
 547             if (!ms_backend->IsAvailable())
 548             {
 549                 wxDELETE(ms_backend);
 550             }
 551         }
 552 #endif
 553
 554         if (!ms_backend)
 555             ms_backend = new wxSoundBackendNull();
 556
 557         if (!ms_backend->HasNativeAsyncPlayback())
 558             ms_backend = new wxSoundSyncOnlyAdaptor(ms_backend);
 559
 560         wxLogTrace(_T("sound"),
 561                    _T("using backend '%s'"), ms_backend->GetName().c_str());
 562     }
 563 }
 564
 565 /*static*/ void wxSound::UnloadBackend()
 566 {
 567     if (ms_backend)
 568     {
 569         wxLogTrace(_T("sound"), _T("unloading backend"));
 570
 571         Stop();
 572
 573         delete ms_backend;
 574         ms_backend = NULL;
 575 #if wxUSE_LIBSDL && wxUSE_PLUGINS
 576         delete ms_backendSDL;
 577 #endif
 578     }
 579 }
 580
 581 bool wxSound::DoPlay(unsigned flags) const
 582 {
 583     wxCHECK_MSG( IsOk(), false, _T("Attempt to play invalid wave data") );
 584
 585     EnsureBackend();
 586     wxSoundPlaybackStatus status;
 587     status.m_playing = true;
 588     status.m_stopRequested = false;
 589     return ms_backend->Play(m_data, flags, &status);
 590 }
 591
 592 /*static*/ void wxSound::Stop()
 593 {
 594     if (ms_backend)
 595         ms_backend->Stop();
 596 }
 597
 598 /*static*/ bool wxSound::IsPlaying()
 599 {
 600     if (ms_backend)
 601         return ms_backend->IsPlaying();
 602     else
 603         return false;
 604 }
 605
 606 void wxSound::Free()
 607 {
 608     if (m_data)
 609         m_data->DecRef();
 610 }
 611
 612 typedef struct
 613 {
 614     wxUint32      uiSize;
 615     wxUint16      uiFormatTag;
 616     wxUint16      uiChannels;
 617     wxUint32      ulSamplesPerSec;
 618     wxUint32      ulAvgBytesPerSec;
 619     wxUint16      uiBlockAlign;
 620     wxUint16      uiBitsPerSample;
 621 } WAVEFORMAT;
 622
 623 #define WAVE_FORMAT_PCM  1
 624 #define WAVE_INDEX       8
 625 #define FMT_INDEX       12
 626
 627 bool wxSound::LoadWAV(const wxUint8 *data, size_t length, bool copyData)
 628 {
 629     WAVEFORMAT waveformat;
 630     wxUint32 ul;
 631
 632     if (length < 32 + sizeof(WAVEFORMAT))
 633         return false;
 634
 635     memcpy(&waveformat, &data[FMT_INDEX + 4], sizeof(WAVEFORMAT));
 636     waveformat.uiSize = wxUINT32_SWAP_ON_BE(waveformat.uiSize);
 637     waveformat.uiFormatTag = wxUINT16_SWAP_ON_BE(waveformat.uiFormatTag);
 638     waveformat.uiChannels = wxUINT16_SWAP_ON_BE(waveformat.uiChannels);
 639     waveformat.ulSamplesPerSec = wxUINT32_SWAP_ON_BE(waveformat.ulSamplesPerSec);
 640     waveformat.ulAvgBytesPerSec = wxUINT32_SWAP_ON_BE(waveformat.ulAvgBytesPerSec);
 641     waveformat.uiBlockAlign = wxUINT16_SWAP_ON_BE(waveformat.uiBlockAlign);
 642     waveformat.uiBitsPerSample = wxUINT16_SWAP_ON_BE(waveformat.uiBitsPerSample);
 643
 644     if (memcmp(data, "RIFF", 4) != 0)
 645         return false;
 646     if (memcmp(&data[WAVE_INDEX], "WAVE", 4) != 0)
 647         return false;
 648     if (memcmp(&data[FMT_INDEX], "fmt ", 4) != 0)
 649         return false;
 650     if (memcmp(&data[FMT_INDEX + waveformat.uiSize + 8], "data", 4) != 0)
 651         return false;
 652     memcpy(&ul,&data[FMT_INDEX + waveformat.uiSize + 12], 4);
 653     ul = wxUINT32_SWAP_ON_BE(ul);
 654
 655     //WAS: if (ul + FMT_INDEX + waveformat.uiSize + 16 != length)
 656     if (ul + FMT_INDEX + waveformat.uiSize + 16 > length)
 657         return false;
 658
 659     if (waveformat.uiFormatTag != WAVE_FORMAT_PCM)
 660         return false;
 661
 662     if (waveformat.ulSamplesPerSec !=
 663         waveformat.ulAvgBytesPerSec / waveformat.uiBlockAlign)
 664         return false;
 665
 666     m_data = new wxSoundData;
 667     m_data->m_channels = waveformat.uiChannels;
 668     m_data->m_samplingRate = waveformat.ulSamplesPerSec;
 669     m_data->m_bitsPerSample = waveformat.uiBitsPerSample;
 670     m_data->m_samples = ul / (m_data->m_channels * m_data->m_bitsPerSample / 8);
 671     m_data->m_dataBytes = ul;
 672
 673     if (copyData)
 674     {
 675         m_data->m_dataWithHeader = new wxUint8[length];
 676         memcpy(m_data->m_dataWithHeader, data, length);
 677     }
 678     else
 679         m_data->m_dataWithHeader = (wxUint8*)data;
 680
 681     m_data->m_data =
 682         (&m_data->m_dataWithHeader[FMT_INDEX + waveformat.uiSize + 8]);
 683
 684     return true;
 685 }
 686
 687
 688 // ----------------------------------------------------------------------------
 689 // wxSoundCleanupModule
 690 // ----------------------------------------------------------------------------
 691
 692 class wxSoundCleanupModule: public wxModule
 693 {
 694 public:
 695     bool OnInit() { return true; }
 696     void OnExit() { wxSound::UnloadBackend(); }
 697     DECLARE_DYNAMIC_CLASS(wxSoundCleanupModule)
 698 };
 699
 700 IMPLEMENT_DYNAMIC_CLASS(wxSoundCleanupModule, wxModule)
 701
 702 #endif