static void
gst_video_rate_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstVideoRate *videorate = GST_VIDEO_RATE (object);
switch (prop_id) {
case ARG_IN:
g_value_set_uint64 (value, videorate->in);
break;
case ARG_OUT:
g_value_set_uint64 (value, videorate->out);
break;
case ARG_DUP:
g_value_set_uint64 (value, videorate->dup);
break;
case ARG_DROP:
g_value_set_uint64 (value, videorate->drop);
break;
case ARG_SILENT:
g_value_set_boolean (value, videorate->silent);
break;
case ARG_NEW_PREF:
g_value_set_double (value, videorate->new_pref);
break;
case ARG_SKIP_TO_FIRST:
g_value_set_boolean (value, videorate->skip_to_first);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_video_rate_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstVideoRate *videorate;
videorate = GST_VIDEO_RATE (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
videorate->discont = TRUE;
videorate->last_ts = -1;
break;
default:
break;
}
ret = parent_class->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_video_rate_reset (videorate);
break;
default:
break;
}
return ret;
}
static GstCaps *
gst_video_rate_getcaps (GstPad * pad)
{
GstVideoRate *videorate;
GstPad *otherpad;
GstCaps *caps;
videorate = GST_VIDEO_RATE (GST_PAD_PARENT (pad));
otherpad = (pad == videorate->srcpad) ? videorate->sinkpad :
videorate->srcpad;
/* we can do what the peer can */
caps = gst_pad_peer_get_caps (otherpad);
if (caps) {
GstCaps *transform;
gst_video_rate_transformcaps (otherpad, caps, pad, &transform);
gst_caps_unref (caps);
caps = transform;
} else {
/* no peer, our padtemplate is enough then */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
return caps;
}
static void
gst_video_rate_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstVideoRate *videorate = GST_VIDEO_RATE (object);
GST_OBJECT_LOCK (videorate);
switch (prop_id) {
case PROP_SILENT:
videorate->silent = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (videorate);
break;
case PROP_NEW_PREF:
videorate->new_pref = g_value_get_double (value);
GST_OBJECT_UNLOCK (videorate);
break;
case PROP_SKIP_TO_FIRST:
videorate->skip_to_first = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (videorate);
break;
case PROP_DROP_ONLY:
videorate->drop_only = g_value_get_boolean (value);
goto reconfigure;
break;
case PROP_AVERAGE_PERIOD:
videorate->average_period_set = g_value_get_uint64 (value);
GST_OBJECT_UNLOCK (videorate);
break;
case PROP_MAX_RATE:
g_atomic_int_set (&videorate->max_rate, g_value_get_int (value));
goto reconfigure;
break;
case PROP_RATE:
videorate->rate = g_value_get_double (value);
GST_OBJECT_UNLOCK (videorate);
gst_videorate_update_duration (videorate);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
GST_OBJECT_UNLOCK (videorate);
break;
}
return;
reconfigure:
GST_OBJECT_UNLOCK (videorate);
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (videorate));
}
static void
gst_video_rate_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstVideoRate *videorate = GST_VIDEO_RATE (object);
gboolean latency_changed = FALSE;
GST_OBJECT_LOCK (videorate);
switch (prop_id) {
case PROP_SILENT:
videorate->silent = g_value_get_boolean (value);
break;
case PROP_NEW_PREF:
videorate->new_pref = g_value_get_double (value);
break;
case PROP_SKIP_TO_FIRST:
videorate->skip_to_first = g_value_get_boolean (value);
break;
case PROP_DROP_ONLY:{
gboolean new_value = g_value_get_boolean (value);
/* Latency changes if we switch drop-only mode */
latency_changed = new_value != videorate->drop_only;
videorate->drop_only = g_value_get_boolean (value);
goto reconfigure;
}
case PROP_AVERAGE_PERIOD:
videorate->average_period_set = g_value_get_uint64 (value);
break;
case PROP_MAX_RATE:
g_atomic_int_set (&videorate->max_rate, g_value_get_int (value));
goto reconfigure;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (videorate);
return;
reconfigure:
GST_OBJECT_UNLOCK (videorate);
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (videorate));
if (latency_changed) {
gst_element_post_message (GST_ELEMENT (videorate),
gst_message_new_latency (GST_OBJECT (videorate)));
}
}
static void
gst_video_rate_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstVideoRate *videorate = GST_VIDEO_RATE (object);
GST_OBJECT_LOCK (videorate);
switch (prop_id) {
case PROP_IN:
g_value_set_uint64 (value, videorate->in);
break;
case PROP_OUT:
g_value_set_uint64 (value, videorate->out);
break;
case PROP_DUP:
g_value_set_uint64 (value, videorate->dup);
break;
case PROP_DROP:
g_value_set_uint64 (value, videorate->drop);
break;
case PROP_SILENT:
g_value_set_boolean (value, videorate->silent);
break;
case PROP_NEW_PREF:
g_value_set_double (value, videorate->new_pref);
break;
case PROP_SKIP_TO_FIRST:
g_value_set_boolean (value, videorate->skip_to_first);
break;
case PROP_DROP_ONLY:
g_value_set_boolean (value, videorate->drop_only);
break;
case PROP_AVERAGE_PERIOD:
g_value_set_uint64 (value, videorate->average_period_set);
break;
case PROP_MAX_RATE:
g_value_set_int (value, g_atomic_int_get (&videorate->max_rate));
break;
case PROP_RATE:
g_value_set_double (value, videorate->rate);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (videorate);
}
static GstFlowReturn
gst_video_rate_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
{
GstVideoRate *videorate;
GstFlowReturn res = GST_BASE_TRANSFORM_FLOW_DROPPED;
GstClockTime intime, in_ts, in_dur;
GstClockTime avg_period;
gboolean skip = FALSE;
videorate = GST_VIDEO_RATE (trans);
/* make sure the denominators are not 0 */
if (videorate->from_rate_denominator == 0 ||
videorate->to_rate_denominator == 0)
goto not_negotiated;
GST_OBJECT_LOCK (videorate);
avg_period = videorate->average_period_set;
GST_OBJECT_UNLOCK (videorate);
/* MT-safe switching between modes */
if (G_UNLIKELY (avg_period != videorate->average_period)) {
gboolean switch_mode = (avg_period == 0 || videorate->average_period == 0);
videorate->average_period = avg_period;
videorate->last_ts = GST_CLOCK_TIME_NONE;
if (switch_mode) {
if (avg_period) {
/* enabling average mode */
videorate->average = 0;
/* make sure no cached buffers from regular mode are left */
gst_video_rate_swap_prev (videorate, NULL, 0);
} else {
/* enable regular mode */
videorate->next_ts = GST_CLOCK_TIME_NONE;
skip = TRUE;
}
/* max averaging mode has a no latency, normal mode does */
gst_element_post_message (GST_ELEMENT (videorate),
gst_message_new_latency (GST_OBJECT (videorate)));
}
}
if (videorate->average_period > 0)
return gst_video_rate_trans_ip_max_avg (videorate, buffer);
in_ts = GST_BUFFER_TIMESTAMP (buffer);
in_dur = GST_BUFFER_DURATION (buffer);
if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE)) {
in_ts = videorate->last_ts;
if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE))
goto invalid_buffer;
}
/* get the time of the next expected buffer timestamp, we use this when the
* next buffer has -1 as a timestamp */
videorate->last_ts = in_ts;
if (in_dur != GST_CLOCK_TIME_NONE)
videorate->last_ts += in_dur;
GST_DEBUG_OBJECT (videorate, "got buffer with timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (in_ts));
/* the input time is the time in the segment + all previously accumulated
* segments */
intime = in_ts + videorate->segment.base;
/* we need to have two buffers to compare */
if (videorate->prevbuf == NULL) {
gst_video_rate_swap_prev (videorate, buffer, intime);
videorate->in++;
if (!GST_CLOCK_TIME_IS_VALID (videorate->next_ts)) {
/* new buffer, we expect to output a buffer that matches the first
* timestamp in the segment */
if (videorate->skip_to_first || skip) {
videorate->next_ts = intime;
videorate->base_ts = in_ts - videorate->segment.start;
videorate->out_frame_count = 0;
} else {
videorate->next_ts = videorate->segment.start + videorate->segment.base;
}
}
} else {
GstClockTime prevtime;
gint count = 0;
gint64 diff1, diff2;
prevtime = videorate->prev_ts;
GST_LOG_OBJECT (videorate,
"BEGINNING prev buf %" GST_TIME_FORMAT " new buf %" GST_TIME_FORMAT
" outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (prevtime),
GST_TIME_ARGS (intime), GST_TIME_ARGS (videorate->next_ts));
videorate->in++;
/* drop new buffer if it's before previous one */
if (intime < prevtime) {
GST_DEBUG_OBJECT (videorate,
"The new buffer (%" GST_TIME_FORMAT
") is before the previous buffer (%"
GST_TIME_FORMAT "). Dropping new buffer.",
GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime));
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
goto done;
}
/* got 2 buffers, see which one is the best */
do {
diff1 = prevtime - videorate->next_ts;
diff2 = intime - videorate->next_ts;
/* take absolute values, beware: abs and ABS don't work for gint64 */
if (diff1 < 0)
diff1 = -diff1;
if (diff2 < 0)
diff2 = -diff2;
GST_LOG_OBJECT (videorate,
"diff with prev %" GST_TIME_FORMAT " diff with new %"
GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2),
GST_TIME_ARGS (videorate->next_ts));
/* output first one when its the best */
if (diff1 <= diff2) {
GstFlowReturn r;
count++;
/* on error the _flush function posted a warning already */
if ((r = gst_video_rate_flush_prev (videorate,
count > 1)) != GST_FLOW_OK) {
res = r;
goto done;
}
}
/* Do not produce any dups. We can exit loop now */
if (videorate->drop_only)
break;
/* continue while the first one was the best, if they were equal avoid
* going into an infinite loop */
}
while (diff1 < diff2);
/* if we outputed the first buffer more then once, we have dups */
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* if we didn't output the first buffer, we have a drop */
else if (count == 0) {
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
GST_LOG_OBJECT (videorate,
"new is best, old never used, drop, outgoing ts %"
GST_TIME_FORMAT, GST_TIME_ARGS (videorate->next_ts));
}
GST_LOG_OBJECT (videorate,
"END, putting new in old, diff1 %" GST_TIME_FORMAT
", diff2 %" GST_TIME_FORMAT ", next_ts %" GST_TIME_FORMAT
", in %" G_GUINT64_FORMAT ", out %" G_GUINT64_FORMAT ", drop %"
G_GUINT64_FORMAT ", dup %" G_GUINT64_FORMAT, GST_TIME_ARGS (diff1),
GST_TIME_ARGS (diff2), GST_TIME_ARGS (videorate->next_ts),
videorate->in, videorate->out, videorate->drop, videorate->dup);
/* swap in new one when it's the best */
gst_video_rate_swap_prev (videorate, buffer, intime);
}
done:
return res;
/* ERRORS */
not_negotiated:
{
GST_WARNING_OBJECT (videorate, "no framerate negotiated");
res = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
invalid_buffer:
{
GST_WARNING_OBJECT (videorate,
"Got buffer with GST_CLOCK_TIME_NONE timestamp, discarding it");
res = GST_BASE_TRANSFORM_FLOW_DROPPED;
goto done;
}
}
static gboolean
gst_video_rate_query (GstBaseTransform * trans, GstPadDirection direction,
GstQuery * query)
{
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
gboolean res = FALSE;
GstPad *otherpad;
otherpad = (direction == GST_PAD_SRC) ?
GST_BASE_TRANSFORM_SINK_PAD (trans) : GST_BASE_TRANSFORM_SRC_PAD (trans);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
guint64 latency;
guint64 avg_period;
GstPad *peer;
GST_OBJECT_LOCK (videorate);
avg_period = videorate->average_period_set;
GST_OBJECT_UNLOCK (videorate);
if (avg_period == 0 && (peer = gst_pad_get_peer (otherpad))) {
if ((res = gst_pad_query (peer, query))) {
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG_OBJECT (videorate, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
if (videorate->from_rate_numerator != 0) {
/* add latency. We don't really know since we hold on to the frames
* until we get a next frame, which can be anything. We assume
* however that this will take from_rate time. */
latency = gst_util_uint64_scale (GST_SECOND,
videorate->from_rate_denominator,
videorate->from_rate_numerator);
} else {
/* no input framerate, we don't know */
latency = 0;
}
GST_DEBUG_OBJECT (videorate, "Our latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (latency));
min += latency;
if (max != -1)
max += latency;
GST_DEBUG_OBJECT (videorate, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
gst_object_unref (peer);
break;
}
/* Simple fallthrough if we don't have a latency or not a peer that we
* can't ask about its latency yet.. */
}
default:
res =
GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
query);
break;
}
return res;
}
static gboolean
gst_video_rate_sink_event (GstBaseTransform * trans, GstEvent * event)
{
GstVideoRate *videorate;
videorate = GST_VIDEO_RATE (trans);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
const GstSegment *segment;
gst_event_parse_segment (event, &segment);
if (segment->format != GST_FORMAT_TIME)
goto format_error;
GST_DEBUG_OBJECT (videorate, "handle NEWSEGMENT");
/* close up the previous segment, if appropriate */
if (videorate->prevbuf) {
gint count = 0;
GstFlowReturn res;
res = GST_FLOW_OK;
/* fill up to the end of current segment,
* or only send out the stored buffer if there is no specific stop.
* regardless, prevent going loopy in strange cases */
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
((GST_CLOCK_TIME_IS_VALID (videorate->segment.stop) &&
videorate->next_ts - videorate->segment.base
< videorate->segment.stop)
|| count < 1)) {
res = gst_video_rate_flush_prev (videorate, count > 0);
count++;
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
} else if (count == 0) {
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
}
/* clean up for the new one; _chain will resume from the new start */
gst_video_rate_swap_prev (videorate, NULL, 0);
}
videorate->base_ts = 0;
videorate->out_frame_count = 0;
videorate->next_ts = GST_CLOCK_TIME_NONE;
/* We just want to update the accumulated stream_time */
gst_segment_copy_into (segment, &videorate->segment);
GST_DEBUG_OBJECT (videorate, "updated segment: %" GST_SEGMENT_FORMAT,
&videorate->segment);
break;
}
case GST_EVENT_EOS:{
gint count = 0;
GstFlowReturn res = GST_FLOW_OK;
GST_DEBUG_OBJECT (videorate, "Got EOS");
/* If the segment has a stop position, fill the segment */
if (GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)) {
/* fill up to the end of current segment,
* or only send out the stored buffer if there is no specific stop.
* regardless, prevent going loopy in strange cases */
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
((videorate->next_ts - videorate->segment.base <
videorate->segment.stop)
|| count < 1)) {
res = gst_video_rate_flush_prev (videorate, count > 0);
count++;
}
} else if (videorate->prevbuf) {
/* Output at least one frame but if the buffer duration is valid, output
* enough frames to use the complete buffer duration */
if (GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf)) {
GstClockTime end_ts =
videorate->next_ts + GST_BUFFER_DURATION (videorate->prevbuf);
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
((videorate->next_ts - videorate->segment.base < end_ts)
|| count < 1)) {
res = gst_video_rate_flush_prev (videorate, count > 0);
count++;
}
} else {
res = gst_video_rate_flush_prev (videorate, FALSE);
count = 1;
}
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
} else if (count == 0) {
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
}
break;
}
case GST_EVENT_FLUSH_STOP:
/* also resets the segment */
GST_DEBUG_OBJECT (videorate, "Got FLUSH_STOP");
gst_video_rate_reset (videorate);
break;
case GST_EVENT_GAP:
/* no gaps after videorate, ignore the event */
gst_event_unref (event);
return TRUE;
default:
break;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
/* ERRORS */
format_error:
{
GST_WARNING_OBJECT (videorate,
"Got segment but doesn't have GST_FORMAT_TIME value");
return FALSE;
}
}
static gboolean
gst_video_rate_setcaps (GstBaseTransform * trans, GstCaps * in_caps,
GstCaps * out_caps)
{
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
GstStructure *structure;
gboolean ret = TRUE;
gint rate_numerator, rate_denominator;
GST_DEBUG_OBJECT (trans, "setcaps called in: %" GST_PTR_FORMAT
" out: %" GST_PTR_FORMAT, in_caps, out_caps);
structure = gst_caps_get_structure (in_caps, 0);
if (!gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator))
goto no_framerate;
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
structure = gst_caps_get_structure (out_caps, 0);
if (!gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator))
goto no_framerate;
/* out_frame_count is scaled by the frame rate caps when calculating next_ts.
* when the frame rate caps change, we must update base_ts and reset
* out_frame_count */
if (videorate->to_rate_numerator) {
videorate->base_ts +=
gst_util_uint64_scale (videorate->out_frame_count,
videorate->to_rate_denominator * GST_SECOND,
videorate->to_rate_numerator);
}
videorate->out_frame_count = 0;
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
if (rate_numerator)
videorate->wanted_diff = gst_util_uint64_scale_int (GST_SECOND,
rate_denominator, rate_numerator);
else
videorate->wanted_diff = 0;
done:
/* After a setcaps, our caps may have changed. In that case, we can't use
* the old buffer, if there was one (it might have different dimensions) */
GST_DEBUG_OBJECT (videorate, "swapping old buffers");
gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);
videorate->last_ts = GST_CLOCK_TIME_NONE;
videorate->average = 0;
return ret;
no_framerate:
{
GST_DEBUG_OBJECT (videorate, "no framerate specified");
ret = FALSE;
goto done;
}
}
static GstCaps *
gst_video_rate_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
GstCaps *ret;
GstStructure *s, *s1, *s2, *s3 = NULL;
int maxrate = g_atomic_int_get (&videorate->max_rate);
gint i;
ret = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (caps); i++) {
s = gst_caps_get_structure (caps, i);
s1 = gst_structure_copy (s);
s2 = gst_structure_copy (s);
if (videorate->drop_only) {
gint min_num = 0, min_denom = 1;
gint max_num = G_MAXINT, max_denom = 1;
/* Clamp the caps to our maximum rate as the first caps if possible */
if (!gst_video_max_rate_clamp_structure (s1, maxrate,
&min_num, &min_denom, &max_num, &max_denom)) {
min_num = 0;
min_denom = 1;
max_num = maxrate;
max_denom = 1;
/* clamp wouldn't be a real subset of 1..maxrate, in this case the sink
* caps should become [1..maxrate], [1..maxint] and the src caps just
* [1..maxrate]. In case there was a caps incompatibility things will
* explode later as appropriate :)
*
* In case [X..maxrate] == [X..maxint], skip as we'll set it later
*/
if (direction == GST_PAD_SRC && maxrate != G_MAXINT)
gst_structure_set (s1, "framerate", GST_TYPE_FRACTION_RANGE,
min_num, min_denom, maxrate, 1, NULL);
else {
gst_structure_free (s1);
s1 = NULL;
}
}
if (direction == GST_PAD_SRC) {
/* We can accept anything as long as it's at least the minimal framerate
* the the sink needs */
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
min_num, min_denom, G_MAXINT, 1, NULL);
/* Also allow unknown framerate, if it isn't already */
if (min_num != 0 || min_denom != 1) {
s3 = gst_structure_copy (s);
gst_structure_set (s3, "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
}
} else if (max_num != 0 || max_denom != 1) {
/* We can provide everything upto the maximum framerate at the src */
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
0, 1, max_num, max_denom, NULL);
}
} else if (direction == GST_PAD_SINK) {
gint min_num = 0, min_denom = 1;
gint max_num = G_MAXINT, max_denom = 1;
if (!gst_video_max_rate_clamp_structure (s1, maxrate,
&min_num, &min_denom, &max_num, &max_denom)) {
gst_structure_free (s1);
s1 = NULL;
}
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
maxrate, 1, NULL);
} else {
/* set the framerate as a range */
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
G_MAXINT, 1, NULL);
}
if (s1 != NULL)
ret = gst_caps_merge_structure (ret, s1);
ret = gst_caps_merge_structure (ret, s2);
if (s3 != NULL)
ret = gst_caps_merge_structure (ret, s3);
}
if (filter) {
GstCaps *intersection;
intersection =
gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (ret);
ret = intersection;
}
return ret;
}
static gboolean
gst_video_rate_stop (GstBaseTransform * trans)
{
gst_video_rate_reset (GST_VIDEO_RATE (trans));
return TRUE;
}
static gboolean
gst_video_rate_setcaps (GstPad * pad, GstCaps * caps)
{
GstVideoRate *videorate;
GstStructure *structure;
gboolean ret = TRUE;
GstPad *otherpad, *opeer;
gint rate_numerator, rate_denominator;
videorate = GST_VIDEO_RATE (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (pad, "setcaps called %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator))
goto no_framerate;
if (pad == videorate->srcpad) {
/* out_frame_count is scaled by the frame rate caps when calculating next_ts.
* when the frame rate caps change, we must update base_ts and reset
* out_frame_count */
if (videorate->to_rate_numerator) {
videorate->base_ts +=
gst_util_uint64_scale (videorate->out_frame_count,
videorate->to_rate_denominator * GST_SECOND,
videorate->to_rate_numerator);
}
videorate->out_frame_count = 0;
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
otherpad = videorate->sinkpad;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
otherpad = videorate->srcpad;
}
/* now try to find something for the peer */
opeer = gst_pad_get_peer (otherpad);
if (opeer) {
if (gst_pad_accept_caps (opeer, caps)) {
/* the peer accepts the caps as they are */
gst_pad_set_caps (otherpad, caps);
ret = TRUE;
} else {
GstCaps *peercaps;
GstCaps *transform = NULL;
ret = FALSE;
/* see how we can transform the input caps */
if (!gst_video_rate_transformcaps (pad, caps, otherpad, &transform))
goto no_transform;
/* see what the peer can do */
peercaps = gst_pad_get_caps (opeer);
GST_DEBUG_OBJECT (opeer, "icaps %" GST_PTR_FORMAT, peercaps);
GST_DEBUG_OBJECT (videorate, "transform %" GST_PTR_FORMAT, transform);
/* filter against our possibilities */
caps = gst_caps_intersect (peercaps, transform);
gst_caps_unref (peercaps);
gst_caps_unref (transform);
GST_DEBUG_OBJECT (videorate, "intersect %" GST_PTR_FORMAT, caps);
/* could turn up empty, due to e.g. colorspace etc */
if (gst_caps_get_size (caps) == 0) {
gst_caps_unref (caps);
goto no_transform;
}
/* take first possibility */
gst_caps_truncate (caps);
structure = gst_caps_get_structure (caps, 0);
/* and fixate */
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
rate_numerator, rate_denominator);
gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator);
if (otherpad == videorate->srcpad) {
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
}
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
if (gst_structure_has_field (structure, "color-matrix"))
gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
gst_pad_set_caps (otherpad, caps);
gst_caps_unref (caps);
ret = TRUE;
}
gst_object_unref (opeer);
}
done:
/* After a setcaps, our caps may have changed. In that case, we can't use
* the old buffer, if there was one (it might have different dimensions) */
GST_DEBUG_OBJECT (videorate, "swapping old buffers");
gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);
gst_object_unref (videorate);
return ret;
no_framerate:
{
GST_DEBUG_OBJECT (videorate, "no framerate specified");
goto done;
}
no_transform:
{
GST_DEBUG_OBJECT (videorate, "no framerate transform possible");
ret = FALSE;
goto done;
}
}
static GstCaps *
gst_video_rate_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps)
{
GstVideoRate *videorate = GST_VIDEO_RATE (trans);
GstCaps *ret;
GstStructure *s, *s2;
GstStructure *s3 = NULL;
int maxrate = g_atomic_int_get (&videorate->max_rate);
/* Should always be called with simple caps */
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), NULL);
ret = gst_caps_copy (caps);
s = gst_caps_get_structure (ret, 0);
s2 = gst_structure_copy (s);
if (videorate->drop_only) {
gint min_num = 0, min_denom = 1;
gint max_num = G_MAXINT, max_denom = 1;
/* Clamp the caps to our maximum rate as the first caps if possible */
if (!gst_video_max_rate_clamp_structure (s, maxrate,
&min_num, &min_denom, &max_num, &max_denom)) {
min_num = 0;
min_denom = 1;
max_num = maxrate;
max_denom = 1;
/* clamp wouldn't be a real subset of 1..maxrate, in this case the sink
* caps should become [1..maxrate], [1..maxint] and the src caps just
* [1..maxrate]. In case there was a caps incompatibility things will
* explode later as appropriate :)
*
* In case [X..maxrate] == [X..maxint], skip as we'll set it later
*/
if (direction == GST_PAD_SRC && maxrate != G_MAXINT)
gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE,
min_num, min_denom, maxrate, 1, NULL);
else
gst_caps_remove_structure (ret, 0);
}
if (direction == GST_PAD_SRC) {
/* We can accept anything as long as it's at least the minimal framerate
* the the sink needs */
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
min_num, min_denom, G_MAXINT, 1, NULL);
/* Also allow unknown framerate, if it isn't already */
if (min_num != 0 || min_denom != 1) {
s3 = gst_structure_copy (s);
gst_structure_set (s3, "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
}
} else if (max_num != 0 || max_denom != 1) {
/* We can provide everything upto the maximum framerate at the src */
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE,
0, 1, max_num, max_denom, NULL);
}
} else if (direction == GST_PAD_SINK) {
gint min_num = 0, min_denom = 1;
gint max_num = G_MAXINT, max_denom = 1;
if (!gst_video_max_rate_clamp_structure (s, maxrate,
&min_num, &min_denom, &max_num, &max_denom))
gst_caps_remove_structure (ret, 0);
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
maxrate, 1, NULL);
} else {
/* set the framerate as a range */
gst_structure_set (s2, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
G_MAXINT, 1, NULL);
}
gst_caps_merge_structure (ret, s2);
if (s3 != NULL)
gst_caps_merge_structure (ret, s3);
return ret;
}
static gboolean
gst_video_rate_event (GstPad * pad, GstEvent * event)
{
GstVideoRate *videorate;
gboolean ret;
videorate = GST_VIDEO_RATE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:
{
gint64 start, stop, time;
gdouble rate, arate;
gboolean update;
GstFormat format;
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
if (format != GST_FORMAT_TIME)
goto format_error;
GST_DEBUG_OBJECT (videorate, "handle NEWSEGMENT");
/* close up the previous segment, if appropriate */
if (!update && videorate->prevbuf) {
gint count = 0;
GstFlowReturn res;
res = GST_FLOW_OK;
/* fill up to the end of current segment,
* or only send out the stored buffer if there is no specific stop.
* regardless, prevent going loopy in strange cases */
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
((GST_CLOCK_TIME_IS_VALID (videorate->segment.stop) &&
videorate->next_ts - videorate->segment.accum
< videorate->segment.stop)
|| count < 1)) {
res = gst_video_rate_flush_prev (videorate, count > 0);
count++;
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
} else if (count == 0) {
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
}
/* clean up for the new one; _chain will resume from the new start */
videorate->base_ts = 0;
videorate->out_frame_count = 0;
gst_video_rate_swap_prev (videorate, NULL, 0);
videorate->next_ts = GST_CLOCK_TIME_NONE;
}
/* We just want to update the accumulated stream_time */
gst_segment_set_newsegment_full (&videorate->segment, update, rate, arate,
format, start, stop, time);
GST_DEBUG_OBJECT (videorate, "updated segment: %" GST_SEGMENT_FORMAT,
&videorate->segment);
break;
}
case GST_EVENT_EOS:{
gint count = 0;
GstFlowReturn res = GST_FLOW_OK;
GST_DEBUG_OBJECT (videorate, "Got EOS");
/* If the segment has a stop position, fill the segment */
if (GST_CLOCK_TIME_IS_VALID (videorate->segment.stop)) {
/* fill up to the end of current segment,
* or only send out the stored buffer if there is no specific stop.
* regardless, prevent going loopy in strange cases */
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
((videorate->next_ts - videorate->segment.accum <
videorate->segment.stop)
|| count < 1)) {
res = gst_video_rate_flush_prev (videorate, count > 0);
count++;
}
} else if (videorate->prevbuf) {
/* Output at least one frame but if the buffer duration is valid, output
* enough frames to use the complete buffer duration */
if (GST_BUFFER_DURATION_IS_VALID (videorate->prevbuf)) {
GstClockTime end_ts =
videorate->next_ts + GST_BUFFER_DURATION (videorate->prevbuf);
while (res == GST_FLOW_OK && count <= MAGIC_LIMIT &&
((videorate->next_ts - videorate->segment.accum < end_ts)
|| count < 1)) {
res = gst_video_rate_flush_prev (videorate, count > 0);
count++;
}
} else {
res = gst_video_rate_flush_prev (videorate, FALSE);
count = 1;
}
}
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
} else if (count == 0) {
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
}
break;
}
case GST_EVENT_FLUSH_STOP:
/* also resets the segment */
GST_DEBUG_OBJECT (videorate, "Got FLUSH_STOP");
gst_video_rate_reset (videorate);
break;
default:
break;
}
ret = gst_pad_push_event (videorate->srcpad, event);
done:
gst_object_unref (videorate);
return ret;
/* ERRORS */
format_error:
{
GST_WARNING_OBJECT (videorate,
"Got segment but doesn't have GST_FORMAT_TIME value");
gst_event_unref (event);
ret = FALSE;
goto done;
}
}
static gboolean
gst_video_rate_query (GstPad * pad, GstQuery * query)
{
GstVideoRate *videorate;
gboolean res = FALSE;
videorate = GST_VIDEO_RATE (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
guint64 latency;
GstPad *peer;
if ((peer = gst_pad_get_peer (videorate->sinkpad))) {
if ((res = gst_pad_query (peer, query))) {
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG_OBJECT (videorate, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
if (videorate->from_rate_numerator != 0) {
/* add latency. We don't really know since we hold on to the frames
* until we get a next frame, which can be anything. We assume
* however that this will take from_rate time. */
latency = gst_util_uint64_scale (GST_SECOND,
videorate->from_rate_denominator,
videorate->from_rate_numerator);
} else {
/* no input framerate, we don't know */
latency = 0;
}
GST_DEBUG_OBJECT (videorate, "Our latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (latency));
min += latency;
if (max != -1)
max += latency;
GST_DEBUG_OBJECT (videorate, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
gst_object_unref (peer);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (videorate);
return res;
}
static GstFlowReturn
gst_video_rate_chain (GstPad * pad, GstBuffer * buffer)
{
GstVideoRate *videorate;
GstFlowReturn res = GST_FLOW_OK;
GstClockTime intime, in_ts, in_dur;
videorate = GST_VIDEO_RATE (GST_PAD_PARENT (pad));
/* make sure the denominators are not 0 */
if (videorate->from_rate_denominator == 0 ||
videorate->to_rate_denominator == 0)
goto not_negotiated;
in_ts = GST_BUFFER_TIMESTAMP (buffer);
in_dur = GST_BUFFER_DURATION (buffer);
if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE)) {
in_ts = videorate->last_ts;
if (G_UNLIKELY (in_ts == GST_CLOCK_TIME_NONE))
goto invalid_buffer;
}
/* get the time of the next expected buffer timestamp, we use this when the
* next buffer has -1 as a timestamp */
videorate->last_ts = in_ts;
if (in_dur != GST_CLOCK_TIME_NONE)
videorate->last_ts += in_dur;
GST_DEBUG_OBJECT (videorate, "got buffer with timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (in_ts));
/* the input time is the time in the segment + all previously accumulated
* segments */
intime = in_ts + videorate->segment.accum;
/* we need to have two buffers to compare */
if (videorate->prevbuf == NULL) {
gst_video_rate_swap_prev (videorate, buffer, intime);
videorate->in++;
if (!GST_CLOCK_TIME_IS_VALID (videorate->next_ts)) {
/* new buffer, we expect to output a buffer that matches the first
* timestamp in the segment */
if (videorate->skip_to_first) {
videorate->next_ts = intime;
videorate->base_ts = in_ts - videorate->segment.start;
videorate->out_frame_count = 0;
} else {
videorate->next_ts =
videorate->segment.start + videorate->segment.accum;
}
}
} else {
GstClockTime prevtime;
gint count = 0;
gint64 diff1, diff2;
prevtime = videorate->prev_ts;
GST_LOG_OBJECT (videorate,
"BEGINNING prev buf %" GST_TIME_FORMAT " new buf %" GST_TIME_FORMAT
" outgoing ts %" GST_TIME_FORMAT, GST_TIME_ARGS (prevtime),
GST_TIME_ARGS (intime), GST_TIME_ARGS (videorate->next_ts));
videorate->in++;
/* drop new buffer if it's before previous one */
if (intime < prevtime) {
GST_DEBUG_OBJECT (videorate,
"The new buffer (%" GST_TIME_FORMAT
") is before the previous buffer (%"
GST_TIME_FORMAT "). Dropping new buffer.",
GST_TIME_ARGS (intime), GST_TIME_ARGS (prevtime));
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
gst_buffer_unref (buffer);
goto done;
}
/* got 2 buffers, see which one is the best */
do {
diff1 = prevtime - videorate->next_ts;
diff2 = intime - videorate->next_ts;
/* take absolute values, beware: abs and ABS don't work for gint64 */
if (diff1 < 0)
diff1 = -diff1;
if (diff2 < 0)
diff2 = -diff2;
GST_LOG_OBJECT (videorate,
"diff with prev %" GST_TIME_FORMAT " diff with new %"
GST_TIME_FORMAT " outgoing ts %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff1), GST_TIME_ARGS (diff2),
GST_TIME_ARGS (videorate->next_ts));
/* output first one when its the best */
if (diff1 <= diff2) {
count++;
/* on error the _flush function posted a warning already */
if ((res =
gst_video_rate_flush_prev (videorate,
count > 1)) != GST_FLOW_OK) {
gst_buffer_unref (buffer);
goto done;
}
}
/* continue while the first one was the best, if they were equal avoid
* going into an infinite loop */
}
while (diff1 < diff2);
/* if we outputed the first buffer more then once, we have dups */
if (count > 1) {
videorate->dup += count - 1;
if (!videorate->silent)
gst_video_rate_notify_duplicate (videorate);
}
/* if we didn't output the first buffer, we have a drop */
else if (count == 0) {
videorate->drop++;
if (!videorate->silent)
gst_video_rate_notify_drop (videorate);
GST_LOG_OBJECT (videorate,
"new is best, old never used, drop, outgoing ts %"
GST_TIME_FORMAT, GST_TIME_ARGS (videorate->next_ts));
}
GST_LOG_OBJECT (videorate,
"END, putting new in old, diff1 %" GST_TIME_FORMAT
", diff2 %" GST_TIME_FORMAT ", next_ts %" GST_TIME_FORMAT
", in %" G_GUINT64_FORMAT ", out %" G_GUINT64_FORMAT ", drop %"
G_GUINT64_FORMAT ", dup %" G_GUINT64_FORMAT, GST_TIME_ARGS (diff1),
GST_TIME_ARGS (diff2), GST_TIME_ARGS (videorate->next_ts),
videorate->in, videorate->out, videorate->drop, videorate->dup);
/* swap in new one when it's the best */
gst_video_rate_swap_prev (videorate, buffer, intime);
}
done:
return res;
/* ERRORS */
not_negotiated:
{
GST_WARNING_OBJECT (videorate, "no framerate negotiated");
gst_buffer_unref (buffer);
res = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
invalid_buffer:
{
GST_WARNING_OBJECT (videorate,
"Got buffer with GST_CLOCK_TIME_NONE timestamp, discarding it");
gst_buffer_unref (buffer);
goto done;
}
}
