C++ (Cpp) RINGBUFFER_IS_SPDIF Examples

Example #1

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

static GstBuffer *
gst_osx_audio_sink_sink_payload (GstAudioBaseSink * sink, GstBuffer * buf)
{
  if (RINGBUFFER_IS_SPDIF (sink->ringbuffer->spec.type)) {
    gint framesize = gst_audio_iec61937_frame_size (&sink->ringbuffer->spec);
    GstBuffer *out;
    GstMapInfo inmap, outmap;
    gboolean res;

    if (framesize <= 0)
      return NULL;

    out = gst_buffer_new_and_alloc (framesize);

    gst_buffer_map (buf, &inmap, GST_MAP_READ);
    gst_buffer_map (out, &outmap, GST_MAP_WRITE);

    /* FIXME: the endianness needs to be queried and then set */
    res = gst_audio_iec61937_payload (inmap.data, inmap.size,
        outmap.data, outmap.size, &sink->ringbuffer->spec, G_BIG_ENDIAN);

    gst_buffer_unmap (buf, &inmap);
    gst_buffer_unmap (out, &outmap);

    if (!res) {
      gst_buffer_unref (out);
      return NULL;
    }

    gst_buffer_copy_into (out, buf, GST_BUFFER_COPY_METADATA, 0, -1);
    return out;

  } else {
    return gst_buffer_ref (buf);
  }
}

Example #2

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;
}