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tsdemux: Handle PES headers bigger than a mpeg-ts packet
While the actual PES header parser could notify us that it needed more data, we would never actually act on it. This commit will accumulate incoming packets in such situation and re-attempt the header parsing. Fixes #1027 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1858>
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parent
ca273f3454
commit
5ff65fbca7
1 changed files with 45 additions and 2 deletions
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@ -172,6 +172,10 @@ struct _TSDemuxStream
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/* Output data */
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PendingPacketState state;
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/* PES header being reconstructed (optional, allocated) */
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guint8 *pending_header_data;
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guint pending_header_size;
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/* Data being reconstructed (allocated) */
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guint8 *data;
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@ -2144,6 +2148,9 @@ gst_ts_demux_stream_flush (TSDemuxStream * stream, GstTSDemux * tsdemux,
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g_free (stream->data);
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stream->data = NULL;
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g_free (stream->pending_header_data);
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stream->pending_header_data = NULL;
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stream->pending_header_size = 0;
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stream->state = PENDING_PACKET_EMPTY;
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stream->expected_size = 0;
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stream->allocated_size = 0;
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@ -2598,9 +2605,26 @@ gst_ts_demux_parse_pes_header (GstTSDemux * demux, TSDemuxStream * stream,
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GST_MEMDUMP ("Header buffer", data, MIN (length, 32));
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if (G_UNLIKELY (stream->pending_header_data)) {
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/* Accumulate with previous header if present */
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stream->pending_header_data =
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g_realloc (stream->pending_header_data,
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stream->pending_header_size + length);
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memcpy (stream->pending_header_data + stream->pending_header_size, data,
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length);
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data = stream->pending_header_data;
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length = stream->pending_header_size + length;
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}
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parseres = mpegts_parse_pes_header (data, length, &header);
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if (G_UNLIKELY (parseres == PES_PARSING_NEED_MORE))
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goto discont;
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if (G_UNLIKELY (parseres == PES_PARSING_NEED_MORE)) {
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/* This can happen if PES header is bigger than a packet. */
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if (!stream->pending_header_data)
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stream->pending_header_data = g_memdup2 (data, length);
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stream->pending_header_size = length;
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return;
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}
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if (G_UNLIKELY (parseres == PES_PARSING_BAD)) {
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GST_WARNING ("Error parsing PES header. pid: 0x%x stream_type: 0x%x",
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stream->stream.pid, stream->stream.stream_type);
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@ -2660,9 +2684,20 @@ gst_ts_demux_parse_pes_header (GstTSDemux * demux, TSDemuxStream * stream,
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stream->state = PENDING_PACKET_BUFFER;
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if (stream->pending_header_data) {
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g_free (stream->pending_header_data);
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stream->pending_header_data = NULL;
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stream->pending_header_size = 0;
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}
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return;
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discont:
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if (stream->pending_header_data) {
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g_free (stream->pending_header_data);
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stream->pending_header_data = NULL;
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stream->pending_header_size = 0;
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}
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stream->state = PENDING_PACKET_DISCONT;
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return;
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}
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@ -2699,6 +2734,10 @@ gst_ts_demux_queue_data (GstTSDemux * demux, TSDemuxStream * stream,
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g_free (stream->data);
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stream->data = NULL;
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}
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if (G_UNLIKELY (stream->pending_header_data)) {
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g_free (stream->pending_header_data);
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stream->pending_header_data = NULL;
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}
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stream->state = PENDING_PACKET_HEADER;
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} else {
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GST_ELEMENT_WARNING_WITH_DETAILS (demux, STREAM, DEMUX,
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@ -2754,6 +2793,10 @@ gst_ts_demux_queue_data (GstTSDemux * demux, TSDemuxStream * stream,
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g_free (stream->data);
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stream->data = NULL;
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}
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if (G_UNLIKELY (stream->pending_header_data)) {
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g_free (stream->pending_header_data);
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stream->pending_header_data = NULL;
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}
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stream->continuity_counter = CONTINUITY_UNSET;
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break;
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}
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