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cea608mux: Add support for seeking

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The "start_time" should be cleared per flush in order to apply
new offset time to each output buffer. Also, input running time
must be compared with output running time, not output position.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4398>
This commit is contained in:
Seungha Yang 2023-04-12 02:17:14 +09:00 committed by GStreamer Marge Bot
parent a3fd3ad4d7
commit 9be36adaa3
1 changed files with 18 additions and 25 deletions
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43
subprojects/gst-plugins-bad/ext/closedcaption/gstcea608mux.c
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@ -244,27 +244,14 @@ gst_cea608_mux_aggregate (GstAggregator * aggregator, gboolean timeout)
gst_util_uint64_scale_int (GST_SECOND, self->cdp_fps_entry->fps_d,
self->cdp_fps_entry->fps_n);
GstSegment *agg_segment = &GST_AGGREGATOR_PAD (aggregator->srcpad)->segment;
GstClockTime output_running_time = agg_segment->position;
GstClockTime output_start_time = agg_segment->position;
GstClockTime output_end_running_time;
if (agg_segment->position == -1 || agg_segment->position < agg_segment->start)
output_start_time = agg_segment->start;
if (!GST_CLOCK_TIME_IS_VALID (self->start_time)) {
if (!GST_CLOCK_TIME_IS_VALID (output_running_time)) {
agg_segment->position = agg_segment->start + output_duration;
GST_TRACE_OBJECT (self, "Initial timeout, setting output position %"
GST_TIME_FORMAT, GST_TIME_ARGS (agg_segment->position));
return GST_AGGREGATOR_FLOW_NEED_DATA;
}
/* Waiting for first buffer to determine start time */
if (timeout) {
agg_segment->position += output_duration;
GST_TRACE_OBJECT (self, "Timeout, advancing output position to %"
GST_TIME_FORMAT, GST_TIME_ARGS (agg_segment->position));
return GST_AGGREGATOR_FLOW_NEED_DATA;
}
self->start_time = output_running_time;
self->start_time = output_start_time;
GST_DEBUG_OBJECT (self, "Start time %" GST_TIME_FORMAT,
GST_TIME_ARGS (self->start_time));
}
@ -272,16 +259,19 @@ gst_cea608_mux_aggregate (GstAggregator * aggregator, gboolean timeout)
best_pad =
find_best_pad (aggregator, &self->earliest_input_running_time, timeout);
output_end_running_time =
gst_segment_to_running_time (agg_segment, GST_FORMAT_TIME,
output_start_time + output_duration);
GST_LOG_OBJECT (self, "best-pad: %s, timeout: %d, "
"earliest input running time: %"
GST_TIME_FORMAT ", output running time: %" GST_TIME_FORMAT,
best_pad ? GST_OBJECT_NAME (best_pad) : "NULL", timeout,
GST_TIME_ARGS (self->earliest_input_running_time),
GST_TIME_ARGS (output_running_time));
GST_TIME_ARGS (output_end_running_time));
if (GST_CLOCK_TIME_IS_VALID (self->earliest_input_running_time)
&& self->earliest_input_running_time >
output_running_time + output_duration) {
&& self->earliest_input_running_time > output_end_running_time) {
/* Nothing to consume, earliest pad is not ready yet */
GST_LOG_OBJECT (self, "Nothing to consume");
} else if (best_pad) {
@ -318,9 +308,7 @@ gst_cea608_mux_aggregate (GstAggregator * aggregator, gboolean timeout)
}
if (flow_ret == GST_FLOW_OK) {
if (timeout
|| output_running_time + output_duration <
self->earliest_input_running_time) {
if (timeout || output_end_running_time < self->earliest_input_running_time) {
flow_ret = finish_s334_both_fields (self);
}
} else if (flow_ret == GST_FLOW_EOS && !cc_buffer_is_empty (self->cc_buffer)) {
@ -349,10 +337,15 @@ static GstFlowReturn
gst_cea608_mux_flush (GstAggregator * aggregator)
{
GstCea608Mux *self = GST_CEA608MUX (aggregator);
GstSegment *agg_segment = &GST_AGGREGATOR_PAD (aggregator->srcpad)->segment;
GST_DEBUG_OBJECT (self, "Flush");
cc_buffer_discard (self->cc_buffer);
self->n_output_buffers = 0;
self->earliest_input_running_time = 0;
self->start_time = GST_CLOCK_TIME_NONE;
agg_segment->position = -1;
return GST_FLOW_OK;
}