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tsdemux: Clear all streams when rewinding

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This avoids sending out partial invalid data downstream which could cause
decoders (ex: `dvdlpmdec`) to error out.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2301>
This commit is contained in:
Edward Hervey 2021-06-03 11:24:53 +02:00 committed by GStreamer Marge Bot
parent 74f81a1a13
commit 80b3ba7b36
1 changed files with 21 additions and 4 deletions
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25
gst/mpegtsdemux/tsdemux.c
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@ -3122,16 +3122,30 @@ gst_ts_demux_push_pending_data (GstTSDemux * demux, TSDemuxStream * stream,
stream->seeked_dts = stream->dts;
stream->needs_keyframe = FALSE;
} else {
GList *tmp;
GST_DEBUG_OBJECT (stream->pad, "Rewinding after keyframe seek failure");
base->seek_offset = demux->last_seek_offset - 200 * base->packetsize;
if (demux->last_seek_offset < 200 * base->packetsize)
base->seek_offset = 0;
demux->last_seek_offset = base->seek_offset;
mpegts_packetizer_flush (base->packetizer, FALSE);
/* Reset all streams accordingly */
for (tmp = demux->program->stream_list; tmp; tmp = tmp->next) {
TSDemuxStream *cand = tmp->data;
GST_DEBUG_OBJECT (cand->pad, "Clearing stream");
cand->continuity_counter = CONTINUITY_UNSET;
cand->state = PENDING_PACKET_EMPTY;
if (cand->data)
g_free (cand->data);
cand->data = NULL;
cand->allocated_size = 0;
cand->current_size = 0;
}
base->mode = BASE_MODE_SEEKING;
stream->continuity_counter = CONTINUITY_UNSET;
res = GST_FLOW_REWINDING;
g_free (stream->data);
goto beach;
}
} else {
@ -3337,8 +3351,11 @@ gst_ts_demux_handle_packet (GstTSDemux * demux, TSDemuxStream * stream,
FLAGS_HAS_PAYLOAD (packet->scram_afc_cc)) {
/* Flush previous data */
res = gst_ts_demux_push_pending_data (demux, stream, NULL);
/* Tell the data collecting to expect this header */
stream->state = PENDING_PACKET_HEADER;
if (res != GST_FLOW_REWINDING) {
/* Tell the data collecting to expect this header. We don't do this when
* rewinding since the states will have been resetted accordingly */
stream->state = PENDING_PACKET_HEADER;
}
}
if (packet->payload && (res == GST_FLOW_OK || res == GST_FLOW_NOT_LINKED)