Ejemplos de gst_wavpack_get_channel_mask_from_positions en C++ (Cpp)

Ejemplo n.º 1

Archivo: gstwavpackenc.c Proyecto: dgerlach/gst-plugins-good

static gboolean
gst_wavpack_enc_sink_set_caps (GstPad * pad, GstCaps * caps)
{
  GstWavpackEnc *enc = GST_WAVPACK_ENC (gst_pad_get_parent (pad));
  GstStructure *structure = gst_caps_get_structure (caps, 0);
  GstAudioChannelPosition *pos;

  if (!gst_structure_get_int (structure, "channels", &enc->channels) ||
      !gst_structure_get_int (structure, "rate", &enc->samplerate) ||
      !gst_structure_get_int (structure, "depth", &enc->depth)) {
    GST_ELEMENT_ERROR (enc, LIBRARY, INIT, (NULL),
        ("got invalid caps: %" GST_PTR_FORMAT, caps));
    gst_object_unref (enc);
    return FALSE;
  }

  pos = gst_audio_get_channel_positions (structure);
  /* If one channel is NONE they'll be all undefined */
  if (pos != NULL && pos[0] == GST_AUDIO_CHANNEL_POSITION_NONE) {
    g_free (pos);
    pos = NULL;
  }

  if (pos == NULL) {
    GST_ELEMENT_ERROR (enc, STREAM, FORMAT, (NULL),
        ("input has no valid channel layout"));

    gst_object_unref (enc);
    return FALSE;
  }

  enc->channel_mask =
      gst_wavpack_get_channel_mask_from_positions (pos, enc->channels);
  enc->need_channel_remap =
      gst_wavpack_set_channel_mapping (pos, enc->channels,
      enc->channel_mapping);
  g_free (pos);

  /* set fixed src pad caps now that we know what we will get */
  caps = gst_caps_new_simple ("audio/x-wavpack",
      "channels", G_TYPE_INT, enc->channels,
      "rate", G_TYPE_INT, enc->samplerate,
      "width", G_TYPE_INT, enc->depth, "framed", G_TYPE_BOOLEAN, TRUE, NULL);

  if (!gst_wavpack_set_channel_layout (caps, enc->channel_mask))
    GST_WARNING_OBJECT (enc, "setting channel layout failed");

  if (!gst_pad_set_caps (enc->srcpad, caps)) {
    GST_ELEMENT_ERROR (enc, LIBRARY, INIT, (NULL),
        ("setting caps failed: %" GST_PTR_FORMAT, caps));
    gst_caps_unref (caps);
    gst_object_unref (enc);
    return FALSE;
  }
  gst_pad_use_fixed_caps (enc->srcpad);

  gst_caps_unref (caps);
  gst_object_unref (enc);
  return TRUE;
}

Ejemplo n.º 2

Archivo: gstwavpackdec.c Proyecto: zaheerm/gst-plugins-good

static gboolean
gst_wavpack_dec_sink_set_caps (GstPad * pad, GstCaps * caps)
{
    GstWavpackDec *dec = GST_WAVPACK_DEC (gst_pad_get_parent (pad));
    GstStructure *structure = gst_caps_get_structure (caps, 0);

    /* Check if we can set the caps here already */
    if (gst_structure_get_int (structure, "channels", &dec->channels) &&
            gst_structure_get_int (structure, "rate", &dec->sample_rate) &&
            gst_structure_get_int (structure, "width", &dec->depth)) {
        GstCaps *caps;
        GstAudioChannelPosition *pos;

        caps = gst_caps_new_simple ("audio/x-raw-int",
                                    "rate", G_TYPE_INT, dec->sample_rate,
                                    "channels", G_TYPE_INT, dec->channels,
                                    "depth", G_TYPE_INT, dec->depth,
                                    "width", G_TYPE_INT, 32,
                                    "endianness", G_TYPE_INT, G_BYTE_ORDER,
                                    "signed", G_TYPE_BOOLEAN, TRUE, NULL);

        /* If we already have the channel layout set from upstream
         * take this */
        if (gst_structure_has_field (structure, "channel-positions")) {
            pos = gst_audio_get_channel_positions (structure);
            if (pos != NULL && dec->channels > 2) {
                GstStructure *new_str = gst_caps_get_structure (caps, 0);

                gst_audio_set_channel_positions (new_str, pos);
                dec->channel_mask =
                    gst_wavpack_get_channel_mask_from_positions (pos, dec->channels);
            }

            if (pos != NULL)
                g_free (pos);
        }

        GST_DEBUG_OBJECT (dec, "setting caps %" GST_PTR_FORMAT, caps);

        /* should always succeed */
        gst_pad_set_caps (dec->srcpad, caps);
        gst_caps_unref (caps);

        /* send GST_TAG_AUDIO_CODEC and GST_TAG_BITRATE tags before something
         * is decoded or after the format has changed */
        gst_wavpack_dec_post_tags (dec);
    }

    gst_object_unref (dec);

    return TRUE;
}