static gboolean
gst_webvtt_enc_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
  GstWebvttEnc *webvttenc = GST_WEBVTT_ENC (parent);
  gboolean ret;

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_CAPS:
    {
      GstCaps *caps;

      caps = gst_static_pad_template_get_caps (&src_template);
      gst_pad_set_caps (webvttenc->srcpad, caps);
      gst_caps_unref (caps);
      gst_event_unref (event);
      ret = TRUE;
      break;
    }
    default:
      ret = gst_pad_event_default (pad, parent, event);
      break;
  }

  return ret;
}
示例#2
0
static GstFlowReturn
gst_webvtt_enc_chain (GstPad * pad, GstBuffer * buf)
{
  GstWebvttEnc *webvttenc;
  GstBuffer *new_buffer;
  gchar *timing;
  GstFlowReturn ret;

  webvttenc = GST_WEBVTT_ENC (gst_pad_get_parent_element (pad));

  if (!webvttenc->pushed_header) {
    const char *header = "WEBVTT\n\n";

    new_buffer = gst_buffer_new_and_alloc (strlen (header));
    memcpy (GST_BUFFER_DATA (new_buffer), header, strlen (header));

    GST_BUFFER_TIMESTAMP (new_buffer) = GST_CLOCK_TIME_NONE;
    GST_BUFFER_DURATION (new_buffer) = GST_CLOCK_TIME_NONE;

    ret = gst_pad_push (webvttenc->srcpad, new_buffer);
    if (ret != GST_FLOW_OK) {
      goto out;
    }

    webvttenc->pushed_header = TRUE;
  }

  gst_object_sync_values (G_OBJECT (webvttenc), GST_BUFFER_TIMESTAMP (buf));

  timing = gst_webvtt_enc_timeconvertion (webvttenc, buf);
  new_buffer =
      gst_buffer_new_and_alloc (strlen (timing) + GST_BUFFER_SIZE (buf) + 1);
  memcpy (GST_BUFFER_DATA (new_buffer), timing, strlen (timing));
  memcpy (GST_BUFFER_DATA (new_buffer) + strlen (timing), GST_BUFFER_DATA (buf),
      GST_BUFFER_SIZE (buf));
  memcpy (GST_BUFFER_DATA (new_buffer) + GST_BUFFER_SIZE (new_buffer) - 1,
      "\n", 1);
  g_free (timing);

  GST_BUFFER_TIMESTAMP (new_buffer) = GST_BUFFER_TIMESTAMP (buf);
  GST_BUFFER_DURATION (new_buffer) = GST_BUFFER_DURATION (buf);


  ret = gst_pad_push (webvttenc->srcpad, new_buffer);

out:
  gst_buffer_unref (buf);
  gst_object_unref (webvttenc);

  return ret;
}
static void
gst_webvtt_enc_get_property (GObject * object,
    guint prop_id, GValue * value, GParamSpec * pspec)
{
  GstWebvttEnc *webvttenc;

  webvttenc = GST_WEBVTT_ENC (object);

  switch (prop_id) {
    case ARG_TIMESTAMP:
      g_value_set_int64 (value, webvttenc->timestamp);
      break;
    case ARG_DURATION:
      g_value_set_int64 (value, webvttenc->duration);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}
static GstStateChangeReturn
gst_webvtt_enc_change_state (GstElement * element, GstStateChange transition)
{
  GstStateChangeReturn ret;
  GstWebvttEnc *webvttenc = GST_WEBVTT_ENC (element);

  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
  if (ret == GST_STATE_CHANGE_FAILURE)
    return ret;

  switch (transition) {
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      gst_webvtt_enc_reset (webvttenc);
      break;
    default:
      break;
  }

  return ret;
}
static GstFlowReturn
gst_webvtt_enc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
  GstWebvttEnc *webvttenc = GST_WEBVTT_ENC (parent);
  GstClockTime ts, dur = GST_SECOND;
  GstBuffer *new_buffer;
  GstMapInfo map_info;
  GstFlowReturn ret;
  GString *s;
  gsize buf_size;

  if (!webvttenc->pushed_header) {
    const char *header = "WEBVTT\n\n";

    new_buffer = gst_buffer_new_wrapped (g_strdup (header), strlen (header));

    GST_BUFFER_PTS (new_buffer) = GST_CLOCK_TIME_NONE;
    GST_BUFFER_DURATION (new_buffer) = GST_CLOCK_TIME_NONE;

    ret = gst_pad_push (webvttenc->srcpad, new_buffer);

    if (ret != GST_FLOW_OK)
      goto out;

    webvttenc->pushed_header = TRUE;
  }

  gst_object_sync_values (GST_OBJECT (webvttenc), GST_BUFFER_PTS (buf));

  ts = GST_BUFFER_PTS (buf) + webvttenc->timestamp;
  if (GST_BUFFER_DURATION_IS_VALID (buf))
    dur = GST_BUFFER_DURATION (buf) + webvttenc->duration;
  else if (webvttenc->duration > 0)
    dur = webvttenc->duration;
  else
    dur = GST_SECOND;

  buf_size = gst_buffer_get_size (buf);
  s = g_string_sized_new (50 + buf_size + 1 + 1);

  /* start_time --> end_time */
  gst_webvtt_enc_append_timestamp_to_string (ts, s);
  g_string_append_printf (s, " --> ");
  gst_webvtt_enc_append_timestamp_to_string (ts + dur, s);
  g_string_append_c (s, '\n');

  /* text */
  if (gst_buffer_map (buf, &map_info, GST_MAP_READ)) {
    g_string_append_len (s, (const gchar *) map_info.data, map_info.size);
    gst_buffer_unmap (buf, &map_info);
  }

  g_string_append_c (s, '\n');

  buf_size = s->len;
  new_buffer = gst_buffer_new_wrapped (g_string_free (s, FALSE), buf_size);

  GST_BUFFER_TIMESTAMP (new_buffer) = GST_BUFFER_TIMESTAMP (buf);
  GST_BUFFER_DURATION (new_buffer) = GST_BUFFER_DURATION (buf);

  ret = gst_pad_push (webvttenc->srcpad, new_buffer);

out:

  gst_buffer_unref (buf);

  return ret;
}