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mpeg4videoparse: handle force key unit events

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This commit is contained in:
Alessandro Decina 2011-12-18 18:37:08 +01:00
parent 94ae4ca833
commit 58cc609b08
2 changed files with 170 additions and 4 deletions
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172
gst/videoparsers/gstmpeg4videoparse.c
View file

@ -31,6 +31,7 @@
#include <string.h>
#include <gst/base/gstbytereader.h>
#include <gst/pbutils/codec-utils.h>
#include <gst/video/video.h>
#include "gstmpeg4videoparse.h"
@ -82,6 +83,9 @@ static void gst_mpeg4vparse_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_mpeg4vparse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_mpeg4vparse_event (GstBaseParse * parse, GstEvent * event);
static gboolean gst_mpeg4vparse_src_event (GstBaseParse * parse,
GstEvent * event);
static void
gst_mpeg4vparse_base_init (gpointer klass)
@ -171,6 +175,8 @@ gst_mpeg4vparse_class_init (GstMpeg4VParseClass * klass)
GST_DEBUG_FUNCPTR (gst_mpeg4vparse_pre_push_frame);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_set_caps);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_get_caps);
parse_class->event = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_event);
parse_class->src_event = GST_DEBUG_FUNCPTR (gst_mpeg4vparse_src_event);
}
static void
@ -197,6 +203,8 @@ gst_mpeg4vparse_reset (GstMpeg4VParse * mp4vparse)
mp4vparse->update_caps = TRUE;
mp4vparse->profile = NULL;
mp4vparse->level = NULL;
mp4vparse->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
mp4vparse->force_key_unit_event = NULL;
gst_buffer_replace (&mp4vparse->config, NULL);
memset (&mp4vparse->vol, 0, sizeof (mp4vparse->vol));
@ -554,14 +562,89 @@ gst_mpeg4vparse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
return GST_FLOW_OK;
}
static GstEvent *
check_pending_key_unit_event (GstEvent * pending_event, GstSegment * segment,
GstClockTime timestamp, guint flags, GstClockTime pending_key_unit_ts)
{
GstClockTime running_time, stream_time;
gboolean all_headers;
guint count;
GstEvent *event = NULL;
g_return_val_if_fail (segment != NULL, NULL);
if (pending_event == NULL)
goto out;
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
timestamp == GST_CLOCK_TIME_NONE)
goto out;
running_time = gst_segment_to_running_time (segment,
GST_FORMAT_TIME, timestamp);
GST_INFO ("now %" GST_TIME_FORMAT " wanted %" GST_TIME_FORMAT,
GST_TIME_ARGS (running_time), GST_TIME_ARGS (pending_key_unit_ts));
if (GST_CLOCK_TIME_IS_VALID (pending_key_unit_ts) &&
running_time < pending_key_unit_ts)
goto out;
if (flags & GST_BUFFER_FLAG_DELTA_UNIT) {
GST_DEBUG ("pending force key unit, waiting for keyframe");
goto out;
}
stream_time = gst_segment_to_stream_time (segment,
GST_FORMAT_TIME, timestamp);
gst_video_event_parse_upstream_force_key_unit (pending_event,
NULL, &all_headers, &count);
event =
gst_video_event_new_downstream_force_key_unit (timestamp, stream_time,
running_time, all_headers, count);
gst_event_set_seqnum (event, gst_event_get_seqnum (pending_event));
out:
return event;
}
static void
gst_mpeg4vparse_prepare_key_unit (GstMpeg4VParse * parse, GstEvent * event)
{
GstClockTime running_time;
guint count;
parse->pending_key_unit_ts = GST_CLOCK_TIME_NONE;
gst_event_replace (&parse->force_key_unit_event, NULL);
gst_video_event_parse_downstream_force_key_unit (event,
NULL, NULL, &running_time, NULL, &count);
GST_INFO_OBJECT (parse, "pushing downstream force-key-unit event %d "
"%" GST_TIME_FORMAT " count %d", gst_event_get_seqnum (event),
GST_TIME_ARGS (running_time), count);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (parse), event);
}
static GstFlowReturn
gst_mpeg4vparse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
GstBuffer *buffer = frame->buffer;
gboolean push_codec = FALSE;
GstEvent *event = NULL;
if ((event = check_pending_key_unit_event (mp4vparse->force_key_unit_event,
&parse->segment, GST_BUFFER_TIMESTAMP (buffer),
GST_BUFFER_FLAGS (buffer), mp4vparse->pending_key_unit_ts))) {
gst_mpeg4vparse_prepare_key_unit (mp4vparse, event);
push_codec = TRUE;
}
/* periodic config sending */
if (mp4vparse->interval > 0) {
if (mp4vparse->interval > 0 || push_codec) {
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
guint64 diff;
@ -583,9 +666,9 @@ gst_mpeg4vparse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
GST_LOG_OBJECT (mp4vparse,
"interval since last config %" GST_TIME_FORMAT, GST_TIME_ARGS (diff));
if (GST_TIME_AS_SECONDS (diff) >= mp4vparse->interval) {
if (GST_TIME_AS_SECONDS (diff) >= mp4vparse->interval || push_codec) {
/* we need to send config now first */
GST_LOG_OBJECT (parse, "inserting config in stream");
GST_INFO_OBJECT (parse, "inserting config in stream");
/* avoid inserting duplicate config */
if ((GST_BUFFER_SIZE (buffer) < GST_BUFFER_SIZE (mp4vparse->config)) ||
@ -600,7 +683,7 @@ gst_mpeg4vparse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
gst_buffer_replace (&frame->buffer, superbuf);
gst_buffer_unref (superbuf);
} else {
GST_LOG_OBJECT (parse, "... but avoiding duplication");
GST_INFO_OBJECT (parse, "... but avoiding duplication");
}
if (G_UNLIKELY (timestamp != -1)) {
@ -690,3 +773,84 @@ gst_mpeg4vparse_get_caps (GstBaseParse * parse)
return res;
}
static gboolean
gst_mpeg4vparse_event (GstBaseParse * parse, GstEvent * event)
{
gboolean handled = FALSE;
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_DOWNSTREAM:
{
GstClockTime timestamp, stream_time, running_time;
gboolean all_headers;
guint count;
if (!gst_video_event_is_force_key_unit (event))
break;
gst_video_event_parse_downstream_force_key_unit (event,
&timestamp, &stream_time, &running_time, &all_headers, &count);
GST_INFO_OBJECT (mp4vparse, "received downstream force key unit event, "
"seqnum %d running_time %" GST_TIME_FORMAT " all_headers %d count %d",
gst_event_get_seqnum (event), GST_TIME_ARGS (running_time),
all_headers, count);
handled = TRUE;
if (mp4vparse->force_key_unit_event) {
GST_INFO_OBJECT (mp4vparse, "ignoring force key unit event "
"as one is already queued");
break;
}
mp4vparse->pending_key_unit_ts = running_time;
gst_event_replace (&mp4vparse->force_key_unit_event, event);
break;
}
default:
break;
}
return handled;
}
static gboolean
gst_mpeg4vparse_src_event (GstBaseParse * parse, GstEvent * event)
{
gboolean handled = FALSE;
GstMpeg4VParse *mp4vparse = GST_MPEG4VIDEO_PARSE (parse);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
{
GstClockTime running_time;
gboolean all_headers;
guint count;
if (!gst_video_event_is_force_key_unit (event))
break;
gst_video_event_parse_upstream_force_key_unit (event,
&running_time, &all_headers, &count);
GST_INFO_OBJECT (mp4vparse, "received upstream force-key-unit event, "
"seqnum %d running_time %" GST_TIME_FORMAT " all_headers %d count %d",
gst_event_get_seqnum (event), GST_TIME_ARGS (running_time),
all_headers, count);
if (!all_headers)
break;
mp4vparse->pending_key_unit_ts = running_time;
gst_event_replace (&mp4vparse->force_key_unit_event, event);
/* leave handled = FALSE so that the event gets propagated upstream */
break;
}
default:
break;
}
return handled;
}

2
gst/videoparsers/gstmpeg4videoparse.h
View file

@ -63,6 +63,8 @@ struct _GstMpeg4VParse {
/* properties */
gboolean drop;
guint interval;
GstClockTime pending_key_unit_ts;
GstEvent *force_key_unit_event;
};
struct _GstMpeg4VParseClass {