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dashdemux: Keep track of the PTS, not the SIDX index position between representations
There is no guarantee that the index positions are the same between representations, and assuming this easily causes us to get into invalid index positions.
This commit is contained in:
Sebastian Dröge
parent
b84f530a9a
commit
b76a2200de
2 changed files with 81 additions and 21 deletions
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@ -1134,7 +1134,9 @@ gst_dash_demux_stream_update_fragment_info (GstAdaptiveDemuxStream * stream)
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gst_dash_demux_stream_update_headers_info (stream);
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dashstream->sidx_base_offset = stream->fragment.index_range_end + 1;
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/* sidx entries may not be available in here */
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if (dashstream->sidx_index != 0 && SIDX (dashstream)->entries) {
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if (dashstream->sidx_position != 0
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&& dashstream->sidx_position != GST_CLOCK_TIME_NONE
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&& SIDX (dashstream)->entries) {
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/* request only the index to be downloaded as we need to reposition the
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* stream to a subsegment */
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return GST_FLOW_OK;
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@ -1204,7 +1206,9 @@ gst_dash_demux_stream_update_fragment_info (GstAdaptiveDemuxStream * stream)
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stream->fragment.uri = fragment.uri;
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/* If mpd does not specify indexRange (i.e., null index_uri),
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* sidx entries may not be available until download it */
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if (isombff && dashstream->sidx_index != 0 && SIDX (dashstream)->entries) {
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if (isombff && dashstream->sidx_position != 0
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&& dashstream->sidx_position != GST_CLOCK_TIME_NONE
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&& SIDX (dashstream)->entries) {
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GstSidxBoxEntry *entry = SIDX_CURRENT_ENTRY (dashstream);
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stream->fragment.range_start =
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dashstream->sidx_base_offset + entry->offset;
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@ -1292,13 +1296,14 @@ gst_dash_demux_stream_sidx_seek (GstDashDemuxStream * dashstream,
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}
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sidx->entry_index = idx;
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dashstream->sidx_index = idx;
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if (idx == sidx->entries_count)
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dashstream->sidx_position =
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sidx->entries[idx - 1].pts + sidx->entries[idx - 1].duration;
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else
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dashstream->sidx_position = sidx->entries[idx].pts;
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if (final_ts) {
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if (idx == sidx->entries_count)
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*final_ts = sidx->entries[idx].pts + sidx->entries[idx].duration;
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else
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*final_ts = sidx->entries[idx].pts;
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*final_ts = dashstream->sidx_position;
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}
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}
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@ -1332,6 +1337,7 @@ gst_dash_demux_stream_seek (GstAdaptiveDemuxStream * stream, gboolean forward,
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gst_isoff_sidx_parser_clear (&dashstream->sidx_parser);
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gst_isoff_sidx_parser_init (&dashstream->sidx_parser);
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dashstream->sidx_base_offset = 0;
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dashstream->sidx_position = GST_CLOCK_TIME_NONE;
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if (dashstream->sidx_adapter)
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gst_adapter_clear (dashstream->sidx_adapter);
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}
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@ -1434,16 +1440,24 @@ gst_dash_demux_stream_advance_subfragment (GstAdaptiveDemuxStream * stream)
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if (dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
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if (stream->demux->segment.rate > 0.0) {
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sidx->entry_index++;
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if (sidx->entry_index < sidx->entries_count) {
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gint idx = ++sidx->entry_index;
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if (idx < sidx->entries_count) {
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fragment_finished = FALSE;
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}
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dashstream->sidx_index++;
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if (idx == sidx->entries_count)
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dashstream->sidx_position =
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sidx->entries[idx - 1].pts + sidx->entries[idx - 1].duration;
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else
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dashstream->sidx_position = sidx->entries[idx].pts;
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} else {
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sidx->entry_index--;
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dashstream->sidx_index--;
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if (sidx->entry_index >= 0) {
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gint idx = --sidx->entry_index;
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if (idx >= 0) {
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fragment_finished = FALSE;
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dashstream->sidx_position = sidx->entries[idx].pts;
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} else {
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dashstream->sidx_position = GST_CLOCK_TIME_NONE;
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}
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}
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}
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@ -1485,6 +1499,8 @@ gst_dash_demux_clear_pending_stream_data (GstDashDemux * dashdemux,
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gst_isoff_sidx_parser_init (&dashstream->sidx_parser);
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if (dashstream->sidx_adapter)
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gst_adapter_clear (dashstream->sidx_adapter);
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dashstream->sidx_base_offset = 0;
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dashstream->sidx_position = GST_CLOCK_TIME_NONE;
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/* Reset ISOBMFF box parsing state */
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if (dashstream->isobmff_adapter)
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@ -1542,7 +1558,7 @@ gst_dash_demux_stream_advance_fragment (GstAdaptiveDemuxStream * stream)
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gst_isoff_sidx_parser_clear (&dashstream->sidx_parser);
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gst_isoff_sidx_parser_init (&dashstream->sidx_parser);
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dashstream->sidx_base_offset = 0;
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dashstream->sidx_index = 0;
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dashstream->sidx_position = GST_CLOCK_TIME_NONE;
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if (dashstream->sidx_adapter)
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gst_adapter_clear (dashstream->sidx_adapter);
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@ -1619,13 +1635,25 @@ gst_dash_demux_stream_select_bitrate (GstAdaptiveDemuxStream * stream,
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}
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if (ret) {
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gst_dash_demux_clear_pending_stream_data (demux, dashstream);
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if (gst_mpd_client_has_isoff_ondemand_profile (demux->client)) {
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if (gst_mpd_client_has_isoff_ondemand_profile (demux->client)
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&& SIDX (dashstream)->entries) {
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/* store our current position to change to the same one in a different
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* representation if needed */
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dashstream->sidx_index = SIDX (dashstream)->entry_index;
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if (SIDX (dashstream)->entry_index < SIDX (dashstream)->entries_count)
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dashstream->sidx_position = SIDX_CURRENT_ENTRY (dashstream)->pts;
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else if (SIDX (dashstream)->entry_index >=
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SIDX (dashstream)->entries_count)
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dashstream->sidx_position =
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SIDX_ENTRY (dashstream,
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SIDX (dashstream)->entries_count - 1)->pts + SIDX_ENTRY (dashstream,
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SIDX (dashstream)->entries_count - 1)->duration;
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else
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dashstream->sidx_position = GST_CLOCK_TIME_NONE;
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} else {
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dashstream->sidx_position = GST_CLOCK_TIME_NONE;
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}
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gst_dash_demux_clear_pending_stream_data (demux, dashstream);
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}
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end:
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@ -2254,7 +2282,23 @@ gst_dash_demux_parse_isobmff (GstAdaptiveDemux * demux,
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/* push buffer up to sidx box, and do pending stream seek */
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break;
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} else {
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SIDX (dash_stream)->entry_index = dash_stream->sidx_index;
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gint idx = 0;
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if (dash_stream->sidx_position == GST_CLOCK_TIME_NONE) {
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idx = 0;
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} else {
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gint i;
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/* Set sidx index to the highest entry that is smaller than our
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* remembered position */
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for (i = 0; i < SIDX (dash_stream)->entries_count; i++) {
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idx = i;
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if (SIDX_ENTRY (dash_stream, i)->pts + SIDX_ENTRY (dash_stream,
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i)->duration > dash_stream->sidx_position)
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break;
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}
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}
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SIDX (dash_stream)->entry_index = idx;
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}
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}
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} else {
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@ -2714,7 +2758,23 @@ gst_dash_demux_data_received (GstAdaptiveDemux * demux,
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NULL);
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dash_stream->pending_seek_ts = GST_CLOCK_TIME_NONE;
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} else {
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SIDX (dash_stream)->entry_index = dash_stream->sidx_index;
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gint idx = 0;
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if (dash_stream->sidx_position == GST_CLOCK_TIME_NONE) {
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idx = 0;
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} else {
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gint i;
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/* Set sidx index to the highest entry that is smaller than our
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* remembered position */
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for (i = 0; i < SIDX (dash_stream)->entries_count; i++) {
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idx = i;
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if (SIDX_ENTRY (dash_stream, i)->pts + SIDX_ENTRY (dash_stream,
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i)->duration > dash_stream->sidx_position)
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break;
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}
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}
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SIDX (dash_stream)->entry_index = idx;
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}
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} else if (consumed < available) {
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GstBuffer *pending;
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@ -69,7 +69,7 @@ struct _GstDashDemuxStream
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/* index parsing */
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GstAdapter *sidx_adapter;
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GstSidxParser sidx_parser;
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gint sidx_index;
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GstClockTime sidx_position;
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gint64 sidx_base_offset;
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GstClockTime pending_seek_ts;
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/* sidx offset tracking */
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