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;
}
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;
}