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dvbsuboverlay: Improve selection of current to be displayed subpictures

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Drop all subpictures that are too old anyway and clear the currently
displayed subpictures if num_rects==0 happens.
This commit is contained in:
Sebastian Dröge 2010-12-03 17:35:36 +01:00 committed by Edward Hervey
parent 01cf79ae59
commit 2282a08890
1 changed files with 36 additions and 12 deletions
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48
gst/dvbsuboverlay/gstdvbsuboverlay.c
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@ -899,16 +899,39 @@ gst_dvbsub_overlay_chain_video (GstPad * pad, GstBuffer * buffer)
g_mutex_lock (overlay->dvbsub_mutex);
if (!g_queue_is_empty (overlay->pending_subtitles)) {
DVBSubtitles *pending_sub = g_queue_peek_head (overlay->pending_subtitles);
if (vid_running_time >= pending_sub->pts) {
GST_DEBUG_OBJECT (overlay,
"Time to show the next subtitle page (%" GST_TIME_FORMAT " >= %"
GST_TIME_FORMAT ") - it has %u regions",
GST_TIME_ARGS (vid_running_time), GST_TIME_ARGS (pending_sub->pts),
pending_sub->num_rects);
dvb_subtitles_free (overlay->current_subtitle);
overlay->current_subtitle = g_queue_pop_head (overlay->pending_subtitles);
/* FIXME: Pre-convert current_subtitle to a quick-blend format, num_rects=0 means that there are no regions, e.g, a subtitle "clear" happened */
DVBSubtitles *pending_sub = NULL;
while (!g_queue_is_empty (overlay->pending_subtitles)) {
pending_sub = g_queue_peek_head (overlay->pending_subtitles);
if (pending_sub->pts +
pending_sub->page_time_out * GST_SECOND *
overlay->subtitle_segment.abs_rate < vid_running_time) {
/* Drop all subpictures that are too late anyway */
dvb_subtitles_free (pending_sub);
g_queue_pop_head (overlay->pending_subtitles);
pending_sub = NULL;
} else if (pending_sub->num_rects == 0) {
/* Clear screen */
if (overlay->current_subtitle)
dvb_subtitles_free (overlay->current_subtitle);
overlay->current_subtitle = NULL;
dvb_subtitles_free (pending_sub);
g_queue_pop_head (overlay->pending_subtitles);
} else if (vid_running_time >= pending_sub->pts) {
GST_DEBUG_OBJECT (overlay,
"Time to show the next subtitle page (%" GST_TIME_FORMAT " >= %"
GST_TIME_FORMAT ") - it has %u regions",
GST_TIME_ARGS (vid_running_time), GST_TIME_ARGS (pending_sub->pts),
pending_sub->num_rects);
dvb_subtitles_free (overlay->current_subtitle);
overlay->current_subtitle =
g_queue_pop_head (overlay->pending_subtitles);
/* FIXME: Pre-convert current_subtitle to a quick-blend format, num_rects=0 means that there are no regions, e.g, a subtitle "clear" happened */
} else {
/* Keep old */
break;
}
}
}
@ -916,7 +939,8 @@ gst_dvbsub_overlay_chain_video (GstPad * pad, GstBuffer * buffer)
if (overlay->current_subtitle
&& vid_running_time >
(overlay->current_subtitle->pts +
(overlay->current_subtitle->page_time_out * GST_SECOND))) {
overlay->current_subtitle->page_time_out * GST_SECOND *
overlay->subtitle_segment.abs_rate)) {
GST_INFO_OBJECT (overlay,
"Subtitle page not redefined before fallback page_time_out of %u seconds (missed data?) - deleting current page",
overlay->current_subtitle->page_time_out);
@ -925,7 +949,7 @@ gst_dvbsub_overlay_chain_video (GstPad * pad, GstBuffer * buffer)
}
/* Now render it */
if (overlay->current_subtitle && overlay->current_subtitle->num_rects > 0) {
if (overlay->current_subtitle) {
buffer = gst_buffer_make_writable (buffer);
blit_i420 (overlay, overlay->current_subtitle, buffer);
}