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cea608mux: don't consume input buffers too early

Browse source 
CCBuffer has no notion of time, we need to push caption pairs in
it when it is ready for consumption and no earlier.

Also perform comparisons with our output running time, not the raw
output PTS.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4103>
This commit is contained in:
Mathieu Duponchelle 2023-03-03 00:24:32 +01:00 committed by GStreamer Marge Bot
parent dfa8661334
commit af714091aa
1 changed files with 18 additions and 9 deletions
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27
subprojects/gst-plugins-bad/ext/closedcaption/gstcea608mux.c
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@ -235,11 +235,26 @@ gst_cea608_mux_aggregate (GstAggregator * aggregator, gboolean timeout)
GstCea608Mux *self = GST_CEA608MUX (aggregator);
GstFlowReturn flow_ret = GST_FLOW_OK;
GstAggregatorPad *best_pad = NULL;
GstClockTime output_pts = gst_util_uint64_scale_int (GST_SECOND,
self->cdp_fps_entry->fps_d * self->n_output_buffers,
self->cdp_fps_entry->fps_n);
GstClockTime output_duration =
gst_util_uint64_scale_int (GST_SECOND, self->cdp_fps_entry->fps_d,
self->cdp_fps_entry->fps_n);
GstClockTime output_running_time =
gst_segment_to_running_time (&GST_AGGREGATOR_PAD (GST_AGGREGATOR_SRC_PAD
(aggregator))->segment,
GST_FORMAT_TIME,
output_pts);
best_pad =
find_best_pad (aggregator, &self->earliest_input_running_time, timeout);
if (best_pad) {
if (GST_CLOCK_TIME_IS_VALID (self->earliest_input_running_time)
&& self->earliest_input_running_time >
output_running_time + output_duration) {
/* Nothing to consume, earliest pad is not ready yet */
} else if (best_pad) {
GstBuffer *buffer;
buffer = gst_aggregator_pad_pop_buffer (GST_AGGREGATOR_PAD (best_pad));
@ -272,15 +287,9 @@ gst_cea608_mux_aggregate (GstAggregator * aggregator, gboolean timeout)
}
if (flow_ret == GST_FLOW_OK) {
GstClockTime output_pts = gst_util_uint64_scale_int (GST_SECOND,
self->cdp_fps_entry->fps_d * self->n_output_buffers,
self->cdp_fps_entry->fps_n);
GstClockTime output_duration =
gst_util_uint64_scale_int (GST_SECOND, self->cdp_fps_entry->fps_d,
self->cdp_fps_entry->fps_n);
if (timeout
|| output_pts + output_duration < self->earliest_input_running_time) {
|| output_running_time + output_duration <
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)) {