static gboolean
gst_jpeg_parse_sink_event (GstPad * pad, GstEvent * event)
{
GstJpegParse *parse;
gboolean res = TRUE;
parse = GST_JPEG_PARSE (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (parse, "event : %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
parse->priv->duration = GST_CLOCK_TIME_NONE;
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
parse->priv->last_resync = FALSE;
gst_adapter_clear (parse->priv->adapter);
break;
case GST_EVENT_EOS:{
/* Push the remaining data, even though it's incomplete */
guint available = gst_adapter_available (parse->priv->adapter);
if (available > 0)
gst_jpeg_parse_push_buffer (parse, available);
res = gst_pad_push_event (parse->priv->srcpad, event);
break;
}
case GST_EVENT_NEWSEGMENT:
/* Discard any data in the adapter. There should have been an EOS before
* to flush it. */
gst_adapter_clear (parse->priv->adapter);
res = gst_pad_push_event (parse->priv->srcpad, event);
parse->priv->new_segment = TRUE;
break;
case GST_EVENT_TAG:{
if (!parse->priv->new_segment)
res = gst_pad_event_default (pad, event);
else {
GstTagList *taglist = NULL;
gst_event_parse_tag (event, &taglist);
/* Hold on to the tags till the srcpad caps are definitely set */
gst_tag_list_insert (get_tag_list (parse), taglist,
GST_TAG_MERGE_REPLACE);
GST_DEBUG ("collected tags: %" GST_PTR_FORMAT, parse->priv->tags);
gst_event_unref (event);
}
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (parse);
return res;
}
static GstStateChangeReturn
gst_jpeg_parse_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstJpegParse *parse;
parse = GST_JPEG_PARSE (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
parse->priv->has_fps = FALSE;
parse->priv->interlaced = FALSE;
parse->priv->width = parse->priv->height = 0;
parse->priv->framerate_numerator = 0;
parse->priv->framerate_denominator = 1;
parse->priv->caps_framerate_numerator =
parse->priv->caps_framerate_denominator = 0;
parse->priv->caps_width = parse->priv->caps_height = -1;
parse->priv->new_segment = FALSE;
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
parse->priv->duration = GST_CLOCK_TIME_NONE;
parse->priv->last_offset = 0;
parse->priv->last_entropy_len = 0;
parse->priv->last_resync = FALSE;
parse->priv->tags = NULL;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_adapter_clear (parse->priv->adapter);
if (parse->priv->tags) {
gst_tag_list_free (parse->priv->tags);
parse->priv->tags = NULL;
}
break;
default:
break;
}
return ret;
}
static void
gst_jpeg_parse_dispose (GObject * object)
{
GstJpegParse *parse = GST_JPEG_PARSE (object);
if (parse->priv->adapter != NULL) {
gst_adapter_clear (parse->priv->adapter);
gst_object_unref (parse->priv->adapter);
parse->priv->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gst_jpeg_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstJpegParse *parse = GST_JPEG_PARSE (GST_OBJECT_PARENT (pad));
GstStructure *s = gst_caps_get_structure (caps, 0);
const GValue *framerate;
if ((framerate = gst_structure_get_value (s, "framerate")) != NULL) {
if (GST_VALUE_HOLDS_FRACTION (framerate)) {
parse->priv->framerate_numerator =
gst_value_get_fraction_numerator (framerate);
parse->priv->framerate_denominator =
gst_value_get_fraction_denominator (framerate);
parse->priv->has_fps = TRUE;
GST_DEBUG_OBJECT (parse, "got framerate of %d/%d",
parse->priv->framerate_numerator, parse->priv->framerate_denominator);
}
}
return TRUE;
}
static GstFlowReturn
gst_jpeg_parse_chain (GstPad * pad, GstBuffer * buf)
{
GstJpegParse *parse;
gint len;
GstClockTime timestamp, duration;
GstFlowReturn ret = GST_FLOW_OK;
parse = GST_JPEG_PARSE (GST_PAD_PARENT (pad));
timestamp = GST_BUFFER_TIMESTAMP (buf);
duration = GST_BUFFER_DURATION (buf);
gst_adapter_push (parse->priv->adapter, buf);
while (ret == GST_FLOW_OK && gst_jpeg_parse_skip_to_jpeg_header (parse)) {
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)))
parse->priv->next_ts = timestamp;
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (duration)))
parse->priv->duration = duration;
/* check if we already have a EOI */
len = gst_jpeg_parse_get_image_length (parse);
if (len == 0) {
return GST_FLOW_OK;
} else if (len < 0) {
gst_adapter_flush (parse->priv->adapter, -len);
continue;
}
GST_LOG_OBJECT (parse, "parsed image of size %d", len);
/* now we have enough in the adapter to process a full jpeg image */
ret = gst_jpeg_parse_push_buffer (parse, len);
}
GST_DEBUG_OBJECT (parse, "No further start marker found.");
return ret;
}
