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, int iDataBits, int iChannel,
 126                  unsigned long ulSamplingRate);
 127
 128     int m_DSPblkSize;        // Size of the DSP buffer
 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
 179     return true;
 180 }
 181
 182 int wxSoundBackendOSS::OpenDSP(const wxSoundData *data)
 183 {
 184     int dev = -1;
 185
 186     if ((dev = open(AUDIODEV, O_WRONLY, 0)) <0)
 187         return -1;
 188
 189     if (!InitDSP(dev,
 190                  (int)data->m_bitsPerSample,
 191                  data->m_channels == 1 ? 0 : 1,
 192                  data->m_samplingRate))
 193     {
 194         close(dev);
 195         return -1;
 196     }
 197
 198     return dev;
 199 }
 200
 201 bool wxSoundBackendOSS::InitDSP(int dev, int iDataBits, int iChannel,
 202                                unsigned long ulSamplingRate)
 203 {
 204     if (ioctl(dev, SNDCTL_DSP_GETBLKSIZE, &m_DSPblkSize) < 0)
 205         return false;
 206     wxLogTrace(_T("sound"), _T("OSS block size: %i"), m_DSPblkSize);
 207     if (m_DSPblkSize < 4096 || m_DSPblkSize > 65536)
 208         return false;
 209     if (ioctl(dev, SNDCTL_DSP_SAMPLESIZE, &iDataBits) < 0)
 210         return false;
 211     if (ioctl(dev, SNDCTL_DSP_STEREO, &iChannel) < 0)
 212         return false;
 213     if (ioctl(dev, SNDCTL_DSP_SPEED, &ulSamplingRate) < 0)
 214         return false;
 215     return true;
 216 }
 217
 218 #endif // HAVE_SYS_SOUNDCARD_H
 219
 220 // ----------------------------------------------------------------------------
 221 // wxSoundSyncOnlyAdaptor
 222 // ----------------------------------------------------------------------------
 223
 224 #if wxUSE_THREADS
 225
 226 class wxSoundSyncOnlyAdaptor;
 227
 228 // this class manages asynchronous playback of audio if the backend doesn't
 229 // support it natively (e.g. OSS backend)
 230 class wxSoundAsyncPlaybackThread : public wxThread
 231 {
 232 public:
 233     wxSoundAsyncPlaybackThread(wxSoundSyncOnlyAdaptor *adaptor,
 234                               wxSoundData *data, unsigned flags)
 235         : wxThread(), m_adapt(adaptor), m_data(data), m_flags(flags) {}
 236     virtual ExitCode Entry();
 237
 238 protected:
 239     wxSoundSyncOnlyAdaptor *m_adapt;
 240     wxSoundData *m_data;
 241     unsigned m_flags;
 242 };
 243
 244 #endif // wxUSE_THREADS
 245
 246 // This class turns wxSoundBackend that doesn't support asynchronous playback
 247 // into one that does
 248 class wxSoundSyncOnlyAdaptor : public wxSoundBackend
 249 {
 250 public:
 251     wxSoundSyncOnlyAdaptor(wxSoundBackend *backend)
 252         : m_backend(backend), m_playing(false) {}
 253     ~wxSoundSyncOnlyAdaptor()
 254     {
 255         delete m_backend;
 256     }
 257     wxString GetName() const
 258     {
 259         return m_backend->GetName();
 260     }
 261     int GetPriority() const
 262     {
 263         return m_backend->GetPriority();
 264     }
 265     bool IsAvailable() const
 266     {
 267         return m_backend->IsAvailable();
 268     }
 269     bool HasNativeAsyncPlayback() const
 270     {
 271         return true;
 272     }
 273     bool Play(wxSoundData *data, unsigned flags,
 274               volatile wxSoundPlaybackStatus *status);
 275     void Stop();
 276     bool IsPlaying() const;
 277
 278 private:
 279     friend class wxSoundAsyncPlaybackThread;
 280
 281     wxSoundBackend *m_backend;
 282     bool m_playing;
 283 #if wxUSE_THREADS
 284     // player thread holds this mutex and releases it after it finishes
 285     // playing, so that the main thread knows when it can play sound
 286     wxMutex m_mutexRightToPlay;
 287     wxSoundPlaybackStatus m_status;
 288 #endif
 289 };
 290
 291
 292 #if wxUSE_THREADS
 293 wxThread::ExitCode wxSoundAsyncPlaybackThread::Entry()
 294 {
 295     m_adapt->m_backend->Play(m_data, m_flags & ~wxSOUND_ASYNC,
 296                              &m_adapt->m_status);
 297
 298     m_data->DecRef();
 299     m_adapt->m_playing = false;
 300     m_adapt->m_mutexRightToPlay.Unlock();
 301     wxLogTrace(_T("sound"), _T("terminated async playback thread"));
 302     return 0;
 303 }
 304 #endif
 305
 306 bool wxSoundSyncOnlyAdaptor::Play(wxSoundData *data, unsigned flags,
 307                                   volatile wxSoundPlaybackStatus *status)
 308 {
 309     Stop();
 310     if (flags & wxSOUND_ASYNC)
 311     {
 312 #if wxUSE_THREADS
 313         m_mutexRightToPlay.Lock();
 314         m_status.m_playing = true;
 315         m_status.m_stopRequested = false;
 316         data->IncRef();
 317         wxThread *th = new wxSoundAsyncPlaybackThread(this, data, flags);
 318         th->Create();
 319         th->Run();
 320         wxLogTrace(_T("sound"), _T("launched async playback thread"));
 321         return true;
 322 #else
 323         wxLogError(_("Unable to play sound asynchronously."));
 324         return false;
 325 #endif
 326     }
 327     else
 328     {
 329 #if wxUSE_THREADS
 330         m_mutexRightToPlay.Lock();
 331 #endif
 332         bool rv = m_backend->Play(data, flags, status);
 333 #if wxUSE_THREADS
 334         m_mutexRightToPlay.Unlock();
 335 #endif
 336         return rv;
 337     }
 338 }
 339
 340 void wxSoundSyncOnlyAdaptor::Stop()
 341 {
 342     wxLogTrace(_T("sound"), _T("asking audio to stop"));
 343     // tell the player thread (if running) to stop playback ASAP:
 344     m_status.m_stopRequested = true;
 345
 346     // acquire the mutex to be sure no sound is being played, then
 347     // release it because we don't need it for anything (the effect of this
 348     // is that calling thread will wait until playback thread reacts to
 349     // our request to interrupt playback):
 350     m_mutexRightToPlay.Lock();
 351     m_mutexRightToPlay.Unlock();
 352     wxLogTrace(_T("sound"), _T("audio was stopped"));
 353 }
 354
 355 bool wxSoundSyncOnlyAdaptor::IsPlaying() const
 356 {
 357     return m_status.m_playing;
 358 }
 359
 360
 361 // ----------------------------------------------------------------------------
 362 // wxSound
 363 // ----------------------------------------------------------------------------
 364
 365 wxSoundBackend *wxSound::ms_backend = NULL;
 366
 367 // FIXME - temporary, until we have plugins architecture
 368 #if wxUSE_LIBSDL
 369     #if wxUSE_PLUGINS
 370         wxDynamicLibrary *wxSound::ms_backendSDL = NULL;
 371     #else
 372         extern "C" wxSoundBackend *wxCreateSoundBackendSDL();
 373     #endif
 374 #endif
 375
 376 wxSound::wxSound() : m_data(NULL)
 377 {
 378 }
 379
 380 wxSound::wxSound(const wxString& sFileName, bool isResource) : m_data(NULL)
 381 {
 382     Create(sFileName, isResource);
 383 }
 384
 385 wxSound::wxSound(int size, const wxByte* data) : m_data(NULL)
 386 {
 387     Create(size, data);
 388 }
 389
 390 wxSound::~wxSound()
 391 {
 392     Free();
 393 }
 394
 395 bool wxSound::Create(const wxString& fileName, bool isResource)
 396 {
 397     wxASSERT_MSG( !isResource,
 398              _T("Loading sound from resources is only supported on Windows") );
 399
 400     Free();
 401
 402     wxFile fileWave;
 403     if (!fileWave.Open(fileName, wxFile::read))
 404         {
 405             return false;
 406         }
 407
 408     size_t len = fileWave.Length();
 409     wxUint8 *data = new wxUint8[len];
 410     if (fileWave.Read(data, len) != len)
 411     {
 412         wxLogError(_("Couldn't load sound data from '%s'."), fileName.c_str());
 413         return false;
 414     }
 415
 416     if (!LoadWAV(data, len, false))
 417     {
 418         wxLogError(_("Sound file '%s' is in unsupported format."),
 419                    fileName.c_str());
 420         return false;
 421     }
 422
 423     return true;
 424 }
 425
 426 bool wxSound::Create(int size, const wxByte* data)
 427 {
 428     wxASSERT( data != NULL );
 429
 430     Free();
 431     if (!LoadWAV(data, size, true))
 432     {
 433         wxLogError(_("Sound data are in unsupported format."));
 434         return false;
 435     }
 436     return true;
 437 }
 438
 439 /*static*/ void wxSound::EnsureBackend()
 440 {
 441     if (!ms_backend)
 442     {
 443         // FIXME -- make this fully dynamic when plugins architecture is in
 444         // place
 445 #ifdef HAVE_SYS_SOUNDCARD_H
 446         ms_backend = new wxSoundBackendOSS();
 447         if (!ms_backend->IsAvailable())
 448         {
 449             wxDELETE(ms_backend);
 450         }
 451 #endif
 452
 453 #if wxUSE_LIBSDL
 454         if (!ms_backend)
 455         {
 456 #if !wxUSE_PLUGINS
 457             ms_backend = wxCreateSoundBackendSDL();
 458 #else
 459             wxString dllname;
 460             dllname.Printf(_T("%s/%s"),
 461                 wxDynamicLibrary::GetPluginsDirectory().c_str(),
 462                 wxDynamicLibrary::CanonicalizePluginName(
 463                     _T("sound_sdl"), wxDL_PLUGIN_BASE).c_str());
 464             wxLogTrace(_T("sound"),
 465                        _T("trying to load SDL plugin from '%s'..."),
 466                        dllname.c_str());
 467             wxLogNull null;
 468             ms_backendSDL = new wxDynamicLibrary(dllname, wxDL_NOW);
 469             if (!ms_backendSDL->IsLoaded())
 470             {
 471                 wxDELETE(ms_backendSDL);
 472             }
 473             else
 474             {
 475                 typedef wxSoundBackend *(*wxCreateSoundBackend_t)();
 476                 wxDYNLIB_FUNCTION(wxCreateSoundBackend_t,
 477                                   wxCreateSoundBackendSDL, *ms_backendSDL);
 478                 if (pfnwxCreateSoundBackendSDL)
 479                 {
 480                     ms_backend = (*pfnwxCreateSoundBackendSDL)();
 481                 }
 482             }
 483 #endif
 484             if (ms_backend && !ms_backend->IsAvailable())
 485             {
 486                 wxDELETE(ms_backend);
 487             }
 488         }
 489 #endif
 490
 491         if (!ms_backend)
 492             ms_backend = new wxSoundBackendNull();
 493
 494         if (!ms_backend->HasNativeAsyncPlayback())
 495             ms_backend = new wxSoundSyncOnlyAdaptor(ms_backend);
 496
 497         wxLogTrace(_T("sound"),
 498                    _T("using backend '%s'"), ms_backend->GetName().c_str());
 499     }
 500 }
 501
 502 /*static*/ void wxSound::UnloadBackend()
 503 {
 504     if (ms_backend)
 505     {
 506         wxLogTrace(_T("sound"), _T("unloading backend"));
 507
 508         Stop();
 509
 510         delete ms_backend;
 511         ms_backend = NULL;
 512 #if wxUSE_LIBSDL && wxUSE_PLUGINS
 513         delete ms_backendSDL;
 514 #endif
 515     }
 516 }
 517
 518 bool wxSound::DoPlay(unsigned flags) const
 519 {
 520     wxCHECK_MSG( IsOk(), false, _T("Attempt to play invalid wave data") );
 521
 522     EnsureBackend();
 523     wxSoundPlaybackStatus status;
 524     status.m_playing = true;
 525     status.m_stopRequested = false;
 526     return ms_backend->Play(m_data, flags, &status);
 527 }
 528
 529 /*static*/ void wxSound::Stop()
 530 {
 531     if (ms_backend)
 532         ms_backend->Stop();
 533 }
 534
 535 /*static*/ bool wxSound::IsPlaying()
 536 {
 537     if (ms_backend)
 538         return ms_backend->IsPlaying();
 539     else
 540         return false;
 541 }
 542
 543 void wxSound::Free()
 544 {
 545     if (m_data)
 546         m_data->DecRef();
 547 }
 548
 549 typedef struct
 550 {
 551     wxUint32      uiSize;
 552     wxUint16      uiFormatTag;
 553     wxUint16      uiChannels;
 554     wxUint32      ulSamplesPerSec;
 555     wxUint32      ulAvgBytesPerSec;
 556     wxUint16      uiBlockAlign;
 557     wxUint16      uiBitsPerSample;
 558 } WAVEFORMAT;
 559
 560 #define MONO             1  // and stereo is 2 by wav format
 561 #define WAVE_FORMAT_PCM  1
 562 #define WAVE_INDEX       8
 563 #define FMT_INDEX       12
 564
 565 bool wxSound::LoadWAV(const wxUint8 *data, size_t length, bool copyData)
 566 {
 567     WAVEFORMAT waveformat;
 568     wxUint32 ul;
 569
 570     if (length < 32 + sizeof(WAVEFORMAT))
 571         return false;
 572
 573     memcpy(&waveformat, &data[FMT_INDEX + 4], sizeof(WAVEFORMAT));
 574     waveformat.uiSize = wxUINT32_SWAP_ON_BE(waveformat.uiSize);
 575     waveformat.uiFormatTag = wxUINT16_SWAP_ON_BE(waveformat.uiFormatTag);
 576     waveformat.uiChannels = wxUINT16_SWAP_ON_BE(waveformat.uiChannels);
 577     waveformat.ulSamplesPerSec = wxUINT32_SWAP_ON_BE(waveformat.ulSamplesPerSec);
 578     waveformat.ulAvgBytesPerSec = wxUINT32_SWAP_ON_BE(waveformat.ulAvgBytesPerSec);
 579     waveformat.uiBlockAlign = wxUINT16_SWAP_ON_BE(waveformat.uiBlockAlign);
 580     waveformat.uiBitsPerSample = wxUINT16_SWAP_ON_BE(waveformat.uiBitsPerSample);
 581
 582     if (memcmp(data, "RIFF", 4) != 0)
 583         return false;
 584     if (memcmp(&data[WAVE_INDEX], "WAVE", 4) != 0)
 585         return false;
 586     if (memcmp(&data[FMT_INDEX], "fmt ", 4) != 0)
 587         return false;
 588     if (memcmp(&data[FMT_INDEX + waveformat.uiSize + 8], "data", 4) != 0)
 589         return false;
 590     memcpy(&ul,&data[FMT_INDEX + waveformat.uiSize + 12], 4);
 591     ul = wxUINT32_SWAP_ON_BE(ul);
 592
 593     //WAS: if (ul + FMT_INDEX + waveformat.uiSize + 16 != length)
 594     if (ul + FMT_INDEX + waveformat.uiSize + 16 > length)
 595         return false;
 596
 597     if (waveformat.uiFormatTag != WAVE_FORMAT_PCM)
 598         return false;
 599
 600     if (waveformat.ulSamplesPerSec !=
 601         waveformat.ulAvgBytesPerSec / waveformat.uiBlockAlign)
 602         return false;
 603
 604     m_data = new wxSoundData;
 605     m_data->m_channels = waveformat.uiChannels;
 606     m_data->m_samplingRate = waveformat.ulSamplesPerSec;
 607     m_data->m_bitsPerSample = waveformat.uiBitsPerSample;
 608     m_data->m_samples = ul / (m_data->m_channels * m_data->m_bitsPerSample / 8);
 609     m_data->m_dataBytes = ul;
 610
 611     if (copyData)
 612     {
 613         m_data->m_dataWithHeader = new wxUint8[length];
 614         memcpy(m_data->m_dataWithHeader, data, length);
 615     }
 616     else
 617         m_data->m_dataWithHeader = (wxUint8*)data;
 618
 619     m_data->m_data =
 620         (&m_data->m_dataWithHeader[FMT_INDEX + waveformat.uiSize + 8]);
 621
 622     return true;
 623 }
 624
 625
 626 // ----------------------------------------------------------------------------
 627 // wxSoundCleanupModule
 628 // ----------------------------------------------------------------------------
 629
 630 class wxSoundCleanupModule: public wxModule
 631 {
 632 public:
 633     bool OnInit() { return true; }
 634     void OnExit() { wxSound::UnloadBackend(); }
 635     DECLARE_DYNAMIC_CLASS(wxSoundCleanupModule)
 636 };
 637
 638 IMPLEMENT_DYNAMIC_CLASS(wxSoundCleanupModule, wxModule)
 639
 640 #endif