C++ (Cpp) SetAudioSrc Examples

Example #1

File: audio_oss_source.cpp Project: acassis/emlinux-ssd1935

bool COSSAudioSource::Init(void)
{
  bool rc = InitAudio(true);

  if (!rc) {
    return false;
  }

  if (!InitDevice()) {
    return false;
  }
  rc = SetAudioSrc(
                   PCMAUDIOFRAME,
                   m_channelsConfigured,
                   m_pConfig->GetIntegerValue(CONFIG_AUDIO_SAMPLE_RATE));

  if (!rc) {
    return false;
  }

  // for live capture we can match the source to the destination
  m_audioSrcSamplesPerFrame = m_audioDstSamplesPerFrame;
  m_pcmFrameSize = 
    m_audioSrcSamplesPerFrame * m_audioSrcChannels * sizeof(u_int16_t);

  if (m_audioOssMaxBufferSize > 0) {
    size_t array_size;
    m_audioOssMaxBufferFrames = m_audioOssMaxBufferSize / m_pcmFrameSize;
    if (m_audioOssMaxBufferFrames == 0) {
      m_audioOssMaxBufferFrames = 1;
    }
    array_size = m_audioOssMaxBufferFrames * sizeof(*m_timestampOverflowArray);
    m_timestampOverflowArray = (Timestamp *)Malloc(array_size);
    memset(m_timestampOverflowArray, 0, array_size);
  }
    
  m_pcmFrameBuffer = (u_int8_t*)malloc(m_pcmFrameSize);
  if (!m_pcmFrameBuffer) {
    goto init_failure;
  }

  // maximum number of passes in ProcessAudio, approx 1 sec.
  m_maxPasses = m_audioSrcSampleRate / m_audioSrcSamplesPerFrame;

  return true;

 init_failure:
  debug_message("audio initialization failed");

  free(m_pcmFrameBuffer);
  m_pcmFrameBuffer = NULL;

  close(m_audioDevice);
  m_audioDevice = -1;
  return false;
}

Example #2

File: audio_alsa_source.cpp Project: BluePandaLi/mpeg4ip

bool CALSAAudioSource::Init(void)
{
  bool rc = InitAudio(true);

  if (!rc) {
    return false;
  }

  if (!InitDevice()) {
    return false;
  }

  //#error we will have to remove this below - the sample rate will be
  rc = SetAudioSrc(
                   PCMAUDIOFRAME,
                   m_channelsConfigured,
                   m_pConfig->GetIntegerValue(CONFIG_AUDIO_SAMPLE_RATE));

  if (!rc) {
    return false;
  }

  // for live capture we can match the source to the destination
  //  m_audioSrcSamplesPerFrame = m_audioDstSamplesPerFrame;
  // gets set 
  m_pcmFrameSize = m_audioSrcSamplesPerFrame * m_audioSrcChannels * sizeof(u_int16_t);

  if (m_audioMaxBufferSize > 0) {
    size_t array_size;
    m_audioMaxBufferFrames = m_audioMaxBufferSize / m_pcmFrameSize;
    if (m_audioMaxBufferFrames == 0) {
      m_audioMaxBufferFrames = 1;
    }
    array_size = m_audioMaxBufferFrames * sizeof(*m_timestampOverflowArray);
    m_timestampOverflowArray = (Timestamp *)Malloc(array_size);
    memset(m_timestampOverflowArray, 0, array_size);
  }
    
  // maximum number of passes in ProcessAudio, approx 1 sec.
  m_maxPasses = m_audioSrcSampleRate / m_audioSrcSamplesPerFrame;

  return true;

#if 0
 init_failure:
  debug_message("audio initialization failed");

  snd_pcm_close(m_pcmHandle);
  m_pcmHandle = -1;
  return false;
#endif
}