Exemple #1
0
static void
gst_rtp_pcma_pay_init (GstRtpPmcaPay * rtppcmapay, GstRtpPmcaPayClass * klass)
{
  GstBaseRTPAudioPayload *basertpaudiopayload;

  basertpaudiopayload = GST_BASE_RTP_AUDIO_PAYLOAD (rtppcmapay);

  GST_BASE_RTP_PAYLOAD (rtppcmapay)->clock_rate = 8000;

  /* tell basertpaudiopayload that this is a sample based codec */
  gst_base_rtp_audio_payload_set_sample_based (basertpaudiopayload);

  /* octet-per-sample is 1 for PCM */
  gst_base_rtp_audio_payload_set_sample_options (basertpaudiopayload, 1);
}
Exemple #2
0
static gboolean
gst_rtp_L16_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
{
  GstRtpL16Pay *rtpL16pay;
  GstStructure *structure;
  gint channels, rate;
  gboolean res;
  gchar *params;
  GstAudioChannelPosition *pos;
  const GstRTPChannelOrder *order;
  GstBaseRTPAudioPayload *basertpaudiopayload;

  basertpaudiopayload = GST_BASE_RTP_AUDIO_PAYLOAD (basepayload);
  rtpL16pay = GST_RTP_L16_PAY (basepayload);

  structure = gst_caps_get_structure (caps, 0);

  /* first parse input caps */
  if (!gst_structure_get_int (structure, "rate", &rate))
    goto no_rate;

  if (!gst_structure_get_int (structure, "channels", &channels))
    goto no_channels;

  /* get the channel order */
  pos = gst_audio_get_channel_positions (structure);
  if (pos)
    order = gst_rtp_channels_get_by_pos (channels, pos);
  else
    order = NULL;

  gst_basertppayload_set_options (basepayload, "audio", TRUE, "L16", rate);
  params = g_strdup_printf ("%d", channels);

  if (!order && channels > 2) {
    GST_ELEMENT_WARNING (rtpL16pay, STREAM, DECODE,
        (NULL), ("Unknown channel order for %d channels", channels));
  }

  if (order && order->name) {
    res = gst_basertppayload_set_outcaps (basepayload,
        "encoding-params", G_TYPE_STRING, params, "channels", G_TYPE_INT,
        channels, "channel-order", G_TYPE_STRING, order->name, NULL);
  } else {
    res = gst_basertppayload_set_outcaps (basepayload,
        "encoding-params", G_TYPE_STRING, params, "channels", G_TYPE_INT,
        channels, NULL);
  }

  g_free (params);
  g_free (pos);

  rtpL16pay->rate = rate;
  rtpL16pay->channels = channels;

  /* octet-per-sample is 2 * channels for L16 */
  gst_base_rtp_audio_payload_set_sample_options (basertpaudiopayload,
      2 * rtpL16pay->channels);

  return res;

  /* ERRORS */
no_rate:
  {
    GST_DEBUG_OBJECT (rtpL16pay, "no rate given");
    return FALSE;
  }
no_channels:
  {
    GST_DEBUG_OBJECT (rtpL16pay, "no channels given");
    return FALSE;
  }
}