C++ (Cpp) GST_OSX_AUDIO_RING_BUFFER Examples

Example #1

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_pause (GstAudioRingBuffer * buf)
{
  GstOsxAudioRingBuffer *osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  return gst_core_audio_pause_processing (osxbuf->core_audio);
}

Example #2

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_close_device (GstAudioRingBuffer * buf)
{
  GstOsxAudioRingBuffer *osxbuf;
  osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  return gst_core_audio_close (osxbuf->core_audio);
}

Example #3

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_open_device (GstAudioRingBuffer * buf)
{
  GstOsxAudioRingBuffer *osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  if (!gst_core_audio_select_device (osxbuf->core_audio))
    return FALSE;

  return gst_core_audio_open (osxbuf->core_audio);
}

Example #4

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_stop (GstAudioRingBuffer * buf)
{
  GstOsxAudioRingBuffer *osxbuf;

  osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  gst_core_audio_stop_processing (osxbuf->core_audio);

  return TRUE;
}

Example #5

File: gstosxaudiosink.c Project: Lachann/gst-plugins-good

static void
gst_osx_audio_sink_set_volume (GstOsxAudioSink * sink)
{
  GstOsxAudioRingBuffer *osxbuf;

  osxbuf = GST_OSX_AUDIO_RING_BUFFER (GST_AUDIO_BASE_SINK (sink)->ringbuffer);
  if (!osxbuf)
    return;

  gst_core_audio_set_volume (osxbuf->core_audio, sink->volume);
}

Example #6

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static void
gst_osx_audio_ring_buffer_dispose (GObject * object)
{
  GstOsxAudioRingBuffer *osxbuf;

  osxbuf = GST_OSX_AUDIO_RING_BUFFER (object);

  if (osxbuf->core_audio) {
    g_object_unref (osxbuf->core_audio);
    osxbuf->core_audio = NULL;
  }
  G_OBJECT_CLASS (ring_parent_class)->dispose (object);
}

Example #7

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_release (GstAudioRingBuffer * buf)
{
  GstOsxAudioRingBuffer *osxbuf;

  osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  gst_core_audio_uninitialize (osxbuf->core_audio);

  g_free (buf->memory);
  buf->memory = NULL;
  buf->size = 0;

  return TRUE;
}

Example #8

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static guint
gst_osx_audio_ring_buffer_delay (GstAudioRingBuffer * buf)
{
  GstOsxAudioRingBuffer *osxbuf;
  double latency;
  guint samples;

  osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  if (!gst_core_audio_get_samples_and_latency (osxbuf->core_audio,
          GST_AUDIO_INFO_RATE (&buf->spec.info), &samples, &latency)) {
    return 0;
  }
  GST_DEBUG_OBJECT (buf, "Got latency: %f seconds -> %d samples",
      latency, samples);
  return samples;
}

Example #9

File: gstosxaudioringbuffer.c Project: ConfusedReality/pkg_multimedia_gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_open_device (GstAudioRingBuffer * buf)
{
  GstObject *osxel = GST_OBJECT_PARENT (buf);
  GstOsxAudioRingBuffer *osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  if (!gst_core_audio_select_device (osxbuf->core_audio)) {
    GST_ELEMENT_ERROR (osxel, RESOURCE, NOT_FOUND,
        (_("CoreAudio device not found")), (NULL));
    return FALSE;
  }

  if (!gst_core_audio_open (osxbuf->core_audio)) {
    GST_ELEMENT_ERROR (osxel, RESOURCE, OPEN_READ,
        (_("CoreAudio device could not be opened")), (NULL));
    return FALSE;
  }

  return TRUE;
}

Example #10

File: gstosxaudioringbuffer.c Project: DylanZA/gst-plugins-good

static gboolean
gst_osx_audio_ring_buffer_acquire (GstAudioRingBuffer * buf,
    GstAudioRingBufferSpec * spec)
{
  gboolean ret = FALSE, is_passthrough = FALSE;
  GstOsxAudioRingBuffer *osxbuf;
  AudioStreamBasicDescription format;

  osxbuf = GST_OSX_AUDIO_RING_BUFFER (buf);

  if (RINGBUFFER_IS_SPDIF (spec->type)) {
    format.mFormatID = kAudioFormat60958AC3;
    format.mSampleRate = (double) GST_AUDIO_INFO_RATE (&spec->info);
    format.mChannelsPerFrame = 2;
    format.mFormatFlags = kAudioFormatFlagIsSignedInteger |
        kAudioFormatFlagIsPacked | kAudioFormatFlagIsNonMixable;
    format.mBytesPerFrame = 0;
    format.mBitsPerChannel = 16;
    format.mBytesPerPacket = 6144;
    format.mFramesPerPacket = 1536;
    format.mReserved = 0;
    spec->segsize = 6144;
    spec->segtotal = 10;
    is_passthrough = TRUE;
  } else {
    int width, depth;
    /* Fill out the audio description we're going to be using */
    format.mFormatID = kAudioFormatLinearPCM;
    format.mSampleRate = (double) GST_AUDIO_INFO_RATE (&spec->info);
    format.mChannelsPerFrame = GST_AUDIO_INFO_CHANNELS (&spec->info);
    if (GST_AUDIO_INFO_IS_FLOAT (&spec->info)) {
      format.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
      width = depth = GST_AUDIO_INFO_WIDTH (&spec->info);
    } else {
      format.mFormatFlags = kAudioFormatFlagIsSignedInteger;
      width = GST_AUDIO_INFO_WIDTH (&spec->info);
      depth = GST_AUDIO_INFO_DEPTH (&spec->info);
      if (width == depth) {
        format.mFormatFlags |= kAudioFormatFlagIsPacked;
      } else {
        format.mFormatFlags |= kAudioFormatFlagIsAlignedHigh;
      }
    }

    if (GST_AUDIO_INFO_IS_BIG_ENDIAN (&spec->info)) {
      format.mFormatFlags |= kAudioFormatFlagIsBigEndian;
    }

    format.mBytesPerFrame = GST_AUDIO_INFO_BPF (&spec->info);
    format.mBitsPerChannel = depth;
    format.mBytesPerPacket = GST_AUDIO_INFO_BPF (&spec->info);
    format.mFramesPerPacket = 1;
    format.mReserved = 0;
    spec->segsize =
        (spec->latency_time * GST_AUDIO_INFO_RATE (&spec->info) /
        G_USEC_PER_SEC) * GST_AUDIO_INFO_BPF (&spec->info);
    spec->segtotal = spec->buffer_time / spec->latency_time;
    is_passthrough = FALSE;
  }

  GST_DEBUG_OBJECT (osxbuf, "Format: " CORE_AUDIO_FORMAT,
      CORE_AUDIO_FORMAT_ARGS (format));

  /* gst_audio_ring_buffer_set_channel_positions is not called
   * since the AUs perform channel reordering themselves.
   * (see gst_core_audio_set_channel_layout) */

  buf->size = spec->segtotal * spec->segsize;
  buf->memory = g_malloc0 (buf->size);

  ret = gst_core_audio_initialize (osxbuf->core_audio, format, spec->caps,
      is_passthrough);

  if (!ret) {
    g_free (buf->memory);
    buf->memory = NULL;
    buf->size = 0;
  }

  osxbuf->segoffset = 0;

  return ret;
}