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dashdemux: Download any sync-sample following the moof directly in key-units only mode
We don't have to do yet another additional request but can just download the data directly. Also unify the key-unit only mode buffer pushing and extract it into its own function now that it became more complicated. https://bugzilla.gnome.org/show_bug.cgi?id=741104
This commit is contained in:
Sebastian Dröge
parent
f8eddabe29
commit
7f1f777b92
2 changed files with 198 additions and 134 deletions
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@ -651,6 +651,7 @@ gst_dash_demux_setup_all_streams (GstDashDemux * demux)
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stream->active_stream = active_stream;
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s = gst_caps_get_structure (caps, 0);
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stream->is_isobmff = gst_structure_has_name (s, "video/quicktime");
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stream->first_sync_sample_always_after_moof = TRUE;
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if (stream->is_isobmff)
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stream->isobmff_adapter = gst_adapter_new ();
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gst_adaptive_demux_stream_set_caps (GST_ADAPTIVE_DEMUX_STREAM_CAST (stream),
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@ -1316,8 +1317,10 @@ gst_dash_demux_stream_advance_subfragment (GstAdaptiveDemuxStream * stream)
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if (sidx->entry_index < 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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} 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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fragment_finished = FALSE;
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}
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@ -1845,7 +1848,12 @@ gst_dash_demux_stream_fragment_finished (GstAdaptiveDemux * demux,
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&& dashstream->active_stream->mimeType == GST_STREAM_VIDEO)
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stream->discont = TRUE;
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if (gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)
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/* Only handle fragment advancing specifically for SIDX if we're not
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* in key unit mode */
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if (!(dashstream->moof_sync_samples
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&& GST_ADAPTIVE_DEMUX (dashdemux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS)
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&& gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)
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&& dashstream->sidx_parser.status == GST_ISOFF_SIDX_PARSER_FINISHED) {
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/* fragment is advanced on data_received when byte limits are reached */
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if (gst_dash_demux_stream_has_next_fragment (stream))
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@ -1870,8 +1878,7 @@ gst_dash_demux_need_another_chunk (GstAdaptiveDemuxStream * stream)
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* fragment until we parsed the moof and arrived at the mdat. 8192 is a
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* random guess for the moof size
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* TODO: Calculate running average for the moof size and use that instead
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* TODO: If the first keyframe is right after the moof, download it directly
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* and give it as chunk size here, also include it in the running average */
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*/
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if (dashstream->is_isobmff
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&& (GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS)
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@ -1879,10 +1886,29 @@ gst_dash_demux_need_another_chunk (GstAdaptiveDemuxStream * stream)
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&& !stream->downloading_header && !stream->downloading_index
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&& dashdemux->allow_trickmode_key_units) {
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if (dashstream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) {
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/* Need to download the moof first to know anything */
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stream->fragment.chunk_size = 8192;
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} else if (dashstream->moof && dashstream->moof_sync_samples) {
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stream->fragment.chunk_size = 0;
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/* Have the moof, either we're done now or we want to download the
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* directly following sync sample */
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if (dashstream->first_sync_sample_after_moof
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&& dashstream->current_sync_sample == 0) {
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GstDashStreamSyncSample *sync_sample =
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&g_array_index (dashstream->moof_sync_samples,
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GstDashStreamSyncSample, 0);
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if (dashstream->isobmff_parser.current_offset <
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sync_sample->end_offset + 1) {
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stream->fragment.chunk_size =
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sync_sample->end_offset + 1 -
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dashstream->isobmff_parser.current_offset;
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} else {
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stream->fragment.chunk_size = 0;
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}
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} else {
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stream->fragment.chunk_size = 0;
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}
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} else {
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/* Have moof but can't do key-units mode, just download until the end */
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stream->fragment.chunk_size = -1;
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}
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} else {
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@ -2005,6 +2031,7 @@ gst_dash_demux_parse_isobmff (GstAdaptiveDemux * demux,
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dash_stream->moof = gst_isoff_moof_box_parse (&sub_reader);
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dash_stream->moof_offset =
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dash_stream->isobmff_parser.current_start_offset;
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dash_stream->moof_size = size;
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dash_stream->current_sync_sample = -1;
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} else {
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gst_byte_reader_skip (&reader, size - header_size);
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@ -2218,9 +2245,132 @@ gst_dash_demux_find_sync_samples (GstAdaptiveDemux * demux,
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return FALSE;
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}
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{
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GstDashStreamSyncSample *sync_sample =
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&g_array_index (dash_stream->moof_sync_samples, GstDashStreamSyncSample,
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0);
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if (dash_stream->moof_offset + dash_stream->moof_size + 8 <
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sync_sample->start_offset) {
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dash_stream->first_sync_sample_after_moof = FALSE;
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dash_stream->first_sync_sample_always_after_moof = FALSE;
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} else {
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dash_stream->first_sync_sample_after_moof = TRUE;
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}
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}
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return TRUE;
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}
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static GstFlowReturn
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gst_dash_demux_handle_isobmff_buffer (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream, GstBuffer * buffer)
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{
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GstDashDemuxStream *dash_stream = (GstDashDemuxStream *) stream;
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GstDashDemux *dashdemux = GST_DASH_DEMUX_CAST (demux);
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GstFlowReturn ret = GST_FLOW_OK;
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if (dashdemux->allow_trickmode_key_units) {
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if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) {
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buffer = gst_dash_demux_parse_isobmff (demux, dash_stream, buffer);
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if (buffer
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&& (ret =
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gst_adaptive_demux_stream_push_buffer (stream,
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buffer)) != GST_FLOW_OK)
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return ret;
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if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT)
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return ret;
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/* Jump to the next sync sample. As we're doing chunked downloading
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* here, just drop data until our chunk is over so we can reuse the
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* HTTP connection instead of having to create a new one or
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* reuse the data if the sync sample follows the moof */
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if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO
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&& gst_dash_demux_find_sync_samples (demux, stream) &&
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GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS) {
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if (dash_stream->first_sync_sample_after_moof) {
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/* If we're here, don't throw away data but collect sync
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* sample while we're at it below. We're doing chunked
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* downloading so might need to adjust the next chunk size for
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* the remainder */
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dash_stream->current_sync_sample = 0;
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} else {
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gst_adapter_clear (dash_stream->isobmff_adapter);
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}
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}
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if (gst_adapter_available (dash_stream->isobmff_adapter) == 0)
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return ret;
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/* We have some data from the mdat available in the adapter, handle it
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* below in the push code */
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buffer =
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gst_adapter_take_buffer (dash_stream->isobmff_adapter,
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gst_adapter_available (dash_stream->isobmff_adapter));
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} else {
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if (dash_stream->isobmff_parser.current_offset == -1) {
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dash_stream->isobmff_parser.current_offset =
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GST_BUFFER_OFFSET_IS_VALID (buffer) ? GST_BUFFER_OFFSET (buffer) :
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0;
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}
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}
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/* At mdat and isobmff and trick modes are allowed */
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/* We're actually running in key-units trick mode */
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if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO
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&& dash_stream->moof_sync_samples
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&& GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS) {
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if (dash_stream->current_sync_sample == -1) {
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/* We're doing chunked downloading and wait for finishing the current
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* chunk so we can jump to the first keyframe */
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gst_buffer_unref (buffer);
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return GST_FLOW_OK;
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} else if (dash_stream->first_sync_sample_after_moof
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&& dash_stream->current_sync_sample == 0) {
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GstDashStreamSyncSample *sync_sample =
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&g_array_index (dash_stream->moof_sync_samples,
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GstDashStreamSyncSample, 0);
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guint64 end_offset =
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dash_stream->isobmff_parser.current_offset +
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gst_buffer_get_size (buffer);
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/* If the first keyframe follows directly the moof and we're
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* downloading it here, make sure to not download too much */
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if (end_offset > sync_sample->end_offset + 1) {
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guint64 remaining =
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sync_sample->end_offset + 1 -
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dash_stream->isobmff_parser.current_offset;
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if (remaining) {
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GstBuffer *sub =
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gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, 0,
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remaining);
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gst_buffer_unref (buffer);
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buffer = sub;
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} else {
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gst_buffer_unref (buffer);
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return GST_FLOW_OK;
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}
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}
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}
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}
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GST_BUFFER_OFFSET (buffer) = dash_stream->isobmff_parser.current_offset;
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dash_stream->isobmff_parser.current_offset += gst_buffer_get_size (buffer);
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GST_BUFFER_OFFSET_END (buffer) = dash_stream->isobmff_parser.current_offset;
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}
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return gst_adaptive_demux_stream_push_buffer (stream, buffer);
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}
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static GstFlowReturn
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gst_dash_demux_data_received (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxStream * stream, GstBuffer * buffer)
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@ -2231,55 +2381,9 @@ gst_dash_demux_data_received (GstAdaptiveDemux * demux,
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guint index_header_or_data;
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if (!gst_mpd_client_has_isoff_ondemand_profile (dashdemux->client)) {
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if (dash_stream->is_isobmff && dashdemux->allow_trickmode_key_units) {
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if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) {
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buffer = gst_dash_demux_parse_isobmff (demux, dash_stream, buffer);
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if (buffer
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&& (ret =
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gst_adaptive_demux_stream_push_buffer (stream,
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buffer)) != GST_FLOW_OK)
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return ret;
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if (dash_stream->isobmff_parser.current_fourcc == GST_ISOFF_FOURCC_MDAT) {
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/* Jump to the next sync sample. As we're doing chunked downloading
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* here, just drop data until our chunk is over so we can reuse the
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* HTTP connection instead of having to create a new one */
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if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO
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&& gst_dash_demux_find_sync_samples (demux, stream) &&
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GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS) {
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gst_adapter_clear (dash_stream->isobmff_adapter);
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return GST_FLOW_OK;
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}
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if (gst_adapter_available (dash_stream->isobmff_adapter) > 0) {
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buffer =
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gst_adapter_take_buffer (dash_stream->isobmff_adapter,
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gst_adapter_available (dash_stream->isobmff_adapter));
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GST_BUFFER_OFFSET (buffer) =
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dash_stream->isobmff_parser.current_offset;
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dash_stream->isobmff_parser.current_offset +=
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gst_buffer_get_size (buffer);
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GST_BUFFER_OFFSET_END (buffer) =
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dash_stream->isobmff_parser.current_offset;
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ret = gst_adaptive_demux_stream_push_buffer (stream, buffer);
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}
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}
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return ret;
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} else if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO
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&& dash_stream->moof_sync_samples
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&& (GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS)
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&& dash_stream->current_sync_sample == -1) {
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/* We're doing chunked downloading and wait for finishing the current
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* chunk so we can jump to the first keyframe */
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gst_buffer_unref (buffer);
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return GST_FLOW_OK;
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}
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}
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if (dash_stream->is_isobmff)
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return gst_dash_demux_handle_isobmff_buffer (demux, stream, buffer);
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else
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return gst_adaptive_demux_stream_push_buffer (stream, buffer);
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}
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@ -2363,59 +2467,44 @@ gst_dash_demux_data_received (GstAdaptiveDemux * demux,
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if (dash_stream->sidx_current_offset + available < sidx_end_offset) {
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buffer = gst_adapter_take_buffer (dash_stream->sidx_adapter, available);
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} else {
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/* In key-units mode, we advance the fragments manually once the
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* current key-unit is over but throw away all data that is after
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* the current sidx entry end */
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if (dash_stream->moof_sync_samples
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&& (GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS)) {
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if (sidx_end_offset <= dash_stream->sidx_current_offset) {
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buffer = NULL;
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gst_adapter_clear (dash_stream->sidx_adapter);
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} else {
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buffer =
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gst_adapter_take_buffer (dash_stream->sidx_adapter,
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sidx_end_offset - dash_stream->sidx_current_offset);
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}
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} else {
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buffer =
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gst_adapter_take_buffer (dash_stream->sidx_adapter,
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sidx_end_offset - dash_stream->sidx_current_offset);
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advance = TRUE;
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}
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}
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if (buffer != NULL) {
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GST_BUFFER_OFFSET (buffer) = dash_stream->sidx_current_offset;
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GST_BUFFER_OFFSET_END (buffer) =
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GST_BUFFER_OFFSET (buffer) + gst_buffer_get_size (buffer);
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dash_stream->sidx_current_offset = GST_BUFFER_OFFSET_END (buffer);
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if (dash_stream->is_isobmff && dashdemux->allow_trickmode_key_units) {
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if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) {
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buffer = gst_dash_demux_parse_isobmff (demux, dash_stream, buffer);
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/* If the buffer we passed to the parser was the last data of the
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* sidx fragment, we must have gotten an output buffer from the
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* parser.
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*/
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g_assert (buffer || !advance);
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/* Leftover in the adapter is actual mdat data if any */
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if (dash_stream->isobmff_parser.current_fourcc ==
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GST_ISOFF_FOURCC_MDAT) {
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/* Jump to the next sync sample */
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if (dash_stream->active_stream->mimeType == GST_STREAM_VIDEO
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&& gst_dash_demux_find_sync_samples (demux, stream)
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&& GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS) {
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if (buffer)
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gst_buffer_unref (buffer);
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return GST_ADAPTIVE_DEMUX_FLOW_END_OF_FRAGMENT;
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}
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if (gst_adapter_available (dash_stream->isobmff_adapter) > 0) {
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GstBuffer *buffer2 =
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gst_adapter_take_buffer (dash_stream->isobmff_adapter,
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gst_adapter_available (dash_stream->isobmff_adapter));
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if (buffer)
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buffer = gst_buffer_append (buffer, buffer2);
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if (dash_stream->is_isobmff)
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ret = gst_dash_demux_handle_isobmff_buffer (demux, stream, buffer);
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else
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buffer = buffer2;
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}
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}
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}
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}
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if (buffer) {
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ret = gst_adaptive_demux_stream_push_buffer (stream, buffer);
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if (advance) {
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if (!(dash_stream->moof_sync_samples
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&& (GST_ADAPTIVE_DEMUX (stream->demux)->
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segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS))
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&& advance) {
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GstFlowReturn new_ret;
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new_ret =
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gst_adaptive_demux_stream_advance_fragment (demux, stream,
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@ -2437,37 +2526,10 @@ gst_dash_demux_data_received (GstAdaptiveDemux * demux,
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GST_BUFFER_OFFSET (buffer) + gst_buffer_get_size (buffer);
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dash_stream->sidx_current_offset = GST_BUFFER_OFFSET_END (buffer);
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if (dash_stream->is_isobmff && dashdemux->allow_trickmode_key_units) {
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if (dash_stream->isobmff_parser.current_fourcc != GST_ISOFF_FOURCC_MDAT) {
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buffer = gst_dash_demux_parse_isobmff (demux, dash_stream, buffer);
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if (buffer
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&& (ret =
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gst_adaptive_demux_stream_push_buffer (stream,
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buffer)) != GST_FLOW_OK)
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return ret;
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if (dash_stream->isobmff_parser.current_fourcc == GST_ISOFF_FOURCC_MDAT) {
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gst_dash_demux_find_sync_samples (demux, stream);
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if (gst_adapter_available (dash_stream->isobmff_adapter) > 0) {
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buffer =
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gst_adapter_take_buffer (dash_stream->isobmff_adapter,
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gst_adapter_available (dash_stream->isobmff_adapter));
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GST_BUFFER_OFFSET (buffer) =
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dash_stream->isobmff_parser.current_offset;
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dash_stream->isobmff_parser.current_offset +=
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gst_buffer_get_size (buffer);
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||||
GST_BUFFER_OFFSET_END (buffer) =
|
||||
dash_stream->isobmff_parser.current_offset;
|
||||
ret = gst_adaptive_demux_stream_push_buffer (stream, buffer);
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
ret = gst_adaptive_demux_stream_push_buffer (stream, buffer);
|
||||
if (dash_stream->is_isobmff)
|
||||
return gst_dash_demux_handle_isobmff_buffer (demux, stream, buffer);
|
||||
else
|
||||
return gst_adaptive_demux_stream_push_buffer (stream, buffer);
|
||||
}
|
||||
|
||||
return ret;
|
||||
|
|
|
|||
|
|
@ -90,9 +90,11 @@ struct _GstDashDemuxStream
|
|||
} isobmff_parser;
|
||||
|
||||
GstMoofBox *moof;
|
||||
guint64 moof_offset;
|
||||
guint64 moof_offset, moof_size;
|
||||
GArray *moof_sync_samples;
|
||||
guint current_sync_sample;
|
||||
|
||||
gboolean first_sync_sample_after_moof, first_sync_sample_always_after_moof;
|
||||
};
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Reference in a new issue