示例#1
0
bool SoundCardPMO::WaitForDrain(void)
{
   unsigned iLoop, iNumHeadersPending = 0;

   for(; !m_bExit && !m_bPause; )
   {   
       g_pHeaderMutex->Acquire();

       for(iLoop = 0, iNumHeadersPending = 0; iLoop < m_num_headers; iLoop++)
       {
           if ((int)m_wavehdr_array[iLoop].dwUser > 0)
               iNumHeadersPending++;
       }
       g_pHeaderMutex->Release();
   
       if (iNumHeadersPending == 0)
       {
          return true;
       }
       WasteTime();
       HandleTimeInfoEvent(NULL);
   }

   return false;
}
示例#2
0
void SoundCardPMO::WorkerThread(void)
{
   void       *pBuffer;
   Error       eErr;
   size_t      iRet;
   Event      *pEvent;
   //   audio_info info;
   bool        bPerfWarn = false;

   // Don't do anything until resume is called.
   m_pPauseSem->Wait();

   // Wait a specified prebuffer time... 
   PreBuffer();

   // The following should be abstracted out into the general thread
   // classes:
#ifdef __linux__
   struct sched_param sParam;

   sParam.sched_priority = sched_get_priority_max(SCHED_OTHER);
   pthread_setschedparam(pthread_self(), SCHED_OTHER, &sParam);
#endif

   for(; !m_bExit;)
   {
      if (m_bPause)
      {
          m_pPauseSem->Wait();
          continue;
      }

      // Loop until we get an Init event from the LMC
      if (!m_properlyInitialized)
      {
          pEvent = ((EventBuffer *)m_pInputBuffer)->GetEvent();

          if (pEvent == NULL)
          {
              m_pLmc->Wake();
              WasteTime();

              continue;
          }

          if (pEvent->Type() == PMO_Init)
          {
              if (IsError(Init(((PMOInitEvent *)pEvent)->GetInfo())))
              {
                  delete pEvent;
                  break;
              }
          }
          delete pEvent;

          continue;
      }

      // Set up reading a block from the buffer. If not enough bytes are
      // available, sleep for a little while and try again.
      for(;;)
      {
          eErr = ((EventBuffer *)m_pInputBuffer)->BeginRead(pBuffer, 
                                                             m_iDataSize);
          if (eErr == kError_EndOfStream || eErr == kError_Interrupt)
             break;

          if (eErr == kError_NoDataAvail)
          {
              m_pLmc->Wake();

              if (!bPerfWarn)
              {
                  time_t t;
    
                  time(&t);
                  m_pContext->log->Log(LogPerf, "Output buffer underflow: %s", 
                             ctime(&t));
                  bPerfWarn = true;
              }
    
              WasteTime();
              continue;
          }

          // Is there an event pending that we need to take care of
          // before we play this block of samples?
          if (eErr == kError_EventPending)
          {
              pEvent = ((EventBuffer *)m_pInputBuffer)->GetEvent();

              if (pEvent->Type() == PMO_Init)
                  Init(((PMOInitEvent *)pEvent)->GetInfo());
    
              if (pEvent->Type() == PMO_Reset)
                  Reset(false);
    
              if (pEvent->Type() == PMO_Info) 
                  HandleTimeInfoEvent((PMOTimeInfoEvent *)pEvent);
    
              if (pEvent->Type() == PMO_Quit) 
              {
                  delete pEvent;
                  if (WaitForDrain())
                     m_pTarget->AcceptEvent(new Event(INFO_DoneOutputting));

                  return;
              }
 
              delete pEvent;
    
              continue;
          }
          
          if (IsError(eErr))
          {
              ReportError("Internal error occured.");
              m_pContext->log->Error("Cannot read from buffer in PMO "
                                    "worker tread: %d\n", eErr);
              break;
          }
          bPerfWarn = false;
          break;
      }

      // Now write the block to the audio device. If the block doesn't
      // all fit, pause and loop until the entire block has been played.
      // This loop could be written using non-blocking io...
      for(;;)
      {
          if (m_bExit || m_bPause)
              break;

	  //          ioctl(audio_fd, AUDIO_GETINFO, &info);
          if (0) //((unsigned)(info.fragments * info.fragsize) < m_iDataSize)
          {
              WasteTime();
              continue;
          }
          break;
      }        
      if (m_bExit || m_bPause)
      {
          m_pInputBuffer->EndRead(0);
          continue;
      }

      iRet = write(audio_fd, pBuffer, m_iDataSize);
      // write(audio_fd, pBuffer, 0); // for WaitForDrain(), maybe?
      if (iRet < 0)
      {
         m_pInputBuffer->EndRead(0);
         ReportError("Could not write sound data to the soundcard.");
         m_pContext->log->Error("Failed to write to the soundcard: %s\n", 
                               strerror(errno));
         break;
      }

      m_iTotalBytesWritten += iRet;
      m_pInputBuffer->EndRead(iRet);
      m_pLmc->Wake();
      UpdateBufferStatus();
   }
}
示例#3
0
void AlsaPMO::WorkerThread(void)
{
   void                      *pBuffer;
   Error                      eErr;
   int                        iRet = -1;
   Event                     *pEvent;
   snd_pcm_channel_status_t  ainfo;

   // Don't do anything until resume is called.
   m_pPauseSem->Wait();

   // Sleep for a pre buffer period
   PreBuffer();

   // The following should be abstracted out into the general thread
   // classes:
#ifdef __linux__
   struct sched_param sParam;

   sParam.sched_priority = sched_get_priority_max(SCHED_OTHER);
   pthread_setschedparam(pthread_self(), SCHED_OTHER, &sParam);
#endif

   ainfo.channel = SND_PCM_CHANNEL_PLAYBACK;
   for(; !m_bExit;)
   {
      if (m_bPause)
      {
          m_pPauseSem->Wait();
          continue;
      }

      // Loop until we get an Init event from the LMC
      if (!m_properlyInitialized)
      {
          pEvent = ((EventBuffer *)m_pInputBuffer)->GetEvent();

          if (pEvent == NULL)
          {
              m_pLmc->Wake();
              WasteTime();

              continue;
          }

          if (pEvent->Type() == PMO_Init)
          {
              if (IsError(Init(((PMOInitEvent *)pEvent)->GetInfo())))
              {
                  delete pEvent;
                  break;
              }
          }
          delete pEvent;

          continue;
      }

      // Set up reading a block from the buffer. If not enough bytes are
      // available, sleep for a little while and try again.
      for(;;)
      {
          eErr = ((EventBuffer *)m_pInputBuffer)->BeginRead(pBuffer, 
                                                             m_iDataSize);
          if (eErr == kError_EndOfStream || eErr == kError_Interrupt)
             break;

          if (eErr == kError_NoDataAvail)
          {
              m_pLmc->Wake();
              CheckForBufferUp();

              WasteTime();
              continue;
          }

          // Is there an event pending that we need to take care of
          // before we play this block of samples?
          if (eErr == kError_EventPending)
          {
              pEvent = ((EventBuffer *)m_pInputBuffer)->PeekEvent();
			  if (pEvent == NULL)
				  continue;
                  
              if (pEvent->Type() == PMO_Quit && 
                  ((EventBuffer *)m_pInputBuffer)->GetNumBytesInBuffer() > 0) 
              {
                  if (WaitForDrain())
				  {
                     Reset(true);
                     m_pTarget->AcceptEvent(new Event(INFO_DoneOutputting));
                     return;
				  }
                  continue;
              }
              
              pEvent = ((EventBuffer *)m_pInputBuffer)->GetEvent();

              if (pEvent->Type() == PMO_Init)
                  Init(((PMOInitEvent *)pEvent)->GetInfo());
    
              if (pEvent->Type() == PMO_Reset)
                  Reset(false);
    
              if (pEvent->Type() == PMO_Info) 
                  HandleTimeInfoEvent((PMOTimeInfoEvent *)pEvent);
    
              if (pEvent->Type() == PMO_Quit) 
              {
                  delete pEvent;
                  m_pTarget->AcceptEvent(new Event(INFO_DoneOutputting));
                  return;
              }
 
              delete pEvent;
    
              continue;
          }
          
          if (IsError(eErr))
          {
              ReportError("Internal error occured.");
              m_pContext->log->Error("Cannot read from buffer in PMO "
                                    "worker tread: %d\n", eErr);
              break;
          }
          break;
      }

      // Now write the block to the audio device. If the block doesn't
      // all fit, pause and loop until the entire block has been played.
      // This loop could be written using non-blocking io...
      for(;!m_bExit && !m_bPause;)
      {
          iRet = snd_pcm_write(m_handle,pBuffer,m_iDataSize);
          if (iRet == -EAGAIN)
          {
               CheckForBufferUp();
               WasteTime();
               continue;
          }
          if (iRet == -EIO)
          {
               snd_pcm_channel_prepare(m_handle, SND_PCM_CHANNEL_PLAYBACK);
               continue;
          }
          break;
      }
      if (m_bExit)
      {
          m_pInputBuffer->EndRead(0);
          return;
      }

      if (m_bPause)
      {
         if (iRet == -EAGAIN)
             m_pInputBuffer->EndRead(0);
         else
         {
             m_pInputBuffer->EndRead(iRet);
             UpdateBufferStatus();
         }
         continue;   
      }

      if (iRet < 0)
      {
         m_pInputBuffer->EndRead(0);
         ReportError("Could not write sound data to the soundcard.");
         m_pContext->log->Error("Failed to write to the soundcard: %s\n", 
                               strerror(errno));
         break;
      }

      m_pInputBuffer->EndRead(iRet);
      m_pLmc->Wake();
      UpdateBufferStatus();
   }
}
示例#4
0
void SoundCardPMO::WorkerThread(void)
{
   void       *pBuffer;
   Error       eErr;
   size_t      iRet;
   Event      *pEvent;
   audio_buf_info info;
   bool        bPerfWarn = false;

   // Don't do anything until resume is called.
   m_pPauseSem->Wait();

   //CheckForBufferUp();

   // Wait a specified prebuffer time...
   PreBuffer();

   for(; !m_bExit;)
   {
      if (m_bPause)
      {
          m_pPauseSem->Wait();
          continue;
      }

      // Loop until we get an Init event from the LMC
      if (!m_properlyInitialized)
      {
          pEvent = ((EventBuffer *)m_pInputBuffer)->GetEvent();

          if (pEvent == NULL)
          {
              m_pLmc->Wake();
              WasteTime();

              continue;
          }

          if (pEvent->Type() == PMO_Init)
          {
              if (IsError(Init(((PMOInitEvent *)pEvent)->GetInfo())))
              {
                  delete pEvent;
                  break;
              }
          }
          delete pEvent;
          continue;
      }

      // Set up reading a block from the buffer. If not enough bytes are
      // available, sleep for a little while and try again.
      for(;;)
      {
          eErr = ((EventBuffer *)m_pInputBuffer)->BeginRead(pBuffer, 
                                                             m_iDataSize);
          if (eErr == kError_EndOfStream || eErr == kError_Interrupt)
             break;

          if (eErr == kError_NoDataAvail)
          {
              m_pLmc->Wake();
              CheckForBufferUp();

              if (!bPerfWarn)
              {
                  time_t t;
    
                  time(&t);
                  m_pContext->log->Log(LogPerf, "Output buffer underflow: %s", 
                             ctime(&t));
                  bPerfWarn = true;
              }
    
              WasteTime();
              continue;
          }

          // Is there an event pending that we need to take care of
          // before we play this block of samples?
          if (eErr == kError_EventPending)
          {
              pEvent = ((EventBuffer *)m_pInputBuffer)->PeekEvent();
              if (pEvent == NULL)
                  continue;

              if (pEvent->Type() == PMO_Quit &&
                  ((EventBuffer *)m_pInputBuffer)->GetNumBytesInBuffer() > 0)
              {
                  if (WaitForDrain())
                  {
                     m_pTarget->AcceptEvent(new Event(INFO_DoneOutputting));
                     return;
                  }
                  continue;
              }  

              pEvent = ((EventBuffer *)m_pInputBuffer)->GetEvent();

              if (pEvent->Type() == PMO_Init)
                  Init(((PMOInitEvent *)pEvent)->GetInfo());
    
              if (pEvent->Type() == PMO_Reset)
                  Reset(false);
    
              if (pEvent->Type() == PMO_Info) 
                  HandleTimeInfoEvent((PMOTimeInfoEvent *)pEvent);

              if (pEvent->Type() == PMO_Quit) 
              {
                  delete pEvent;
                  m_pTarget->AcceptEvent(new Event(INFO_DoneOutputting));
                  return;
              }
 
              delete pEvent;
    
              continue;
          }
          
          if (IsError(eErr))
          {
              ReportError("Internal error occured.");
              m_pContext->log->Error("Cannot read from buffer in PMO "
                                    "worker tread: %d\n", eErr);
              break;
          }
          bPerfWarn = false;
          break;
      }

      if (m_bExit || m_bPause)
      {
          m_pInputBuffer->EndRead(0);
          continue;
      }

      iRet = ALwritesamps(outaudioport, pBuffer, m_iDataSize);
      if ((int)iRet < 0)
      {
         m_pInputBuffer->EndRead(0);
         ReportError("Could not write sound data to the soundcard.");
         m_pContext->log->Error("Failed to write to the soundcard: %s\n", 
                               strerror(errno));
         break;
      }

      m_iTotalBytesWritten += iRet;
      m_pInputBuffer->EndRead(iRet);
      m_pLmc->Wake();
      UpdateBufferStatus();
   }
}