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mxfdemux: Output timecodes for video streams

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This commit is contained in:
Sebastian Dröge 2017-07-24 16:49:19 +03:00
parent c2ef63a3bc
commit 26d5ba42ea
2 changed files with 69 additions and 0 deletions
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66
gst/mxf/mxfdemux.c
View file

@ -916,6 +916,7 @@ gst_mxf_demux_update_tracks (GstMXFDemux * demux)
guint component_index;
GstFlowReturn ret;
GList *pads = NULL, *l;
GstVideoTimeCode start_timecode = { 0, };
g_rw_lock_writer_lock (&demux->metadata_lock);
GST_DEBUG_OBJECT (demux, "Updating tracks");
@ -942,6 +943,60 @@ gst_mxf_demux_update_tracks (GstMXFDemux * demux)
first_run = (demux->src->len == 0);
/* For material packages, there must be one timecode track with one
* continuous timecode. For source packages there might be multiple,
* discontinuous timecode components.
* TODO: Support multiple timecode components
*/
for (i = 0; i < current_package->n_tracks; i++) {
MXFMetadataTimelineTrack *track = NULL;
MXFMetadataSequence *sequence = NULL;
MXFMetadataTimecodeComponent *component = NULL;
if (!current_package->tracks[i]) {
GST_WARNING_OBJECT (demux, "Unresolved track");
continue;
}
if (!MXF_IS_METADATA_TIMELINE_TRACK (current_package->tracks[i])) {
GST_DEBUG_OBJECT (demux, "No timeline track");
continue;
}
track = MXF_METADATA_TIMELINE_TRACK (current_package->tracks[i]);
if (!track->parent.sequence)
continue;
sequence = track->parent.sequence;
if (sequence->n_structural_components != 1 ||
!sequence->structural_components[0]
||
!MXF_IS_METADATA_TIMECODE_COMPONENT (sequence->structural_components
[0]))
continue;
component =
MXF_METADATA_TIMECODE_COMPONENT (sequence->structural_components[0]);
/* Not a timecode track */
if (track->parent.type && (track->parent.type & 0xf0) != 0x10)
continue;
/* Main timecode track must have id 1, all others must be 0 */
if (track->parent.track_id != 1)
continue;
gst_video_time_code_init (&start_timecode, track->edit_rate.n,
track->edit_rate.d, NULL, (component->drop_frame
?
GST_VIDEO_TIME_CODE_FLAGS_DROP_FRAME
: GST_VIDEO_TIME_CODE_FLAGS_NONE), 0, 0, 0, 0, 0);
gst_video_time_code_add_frames (&start_timecode, track->origin);
gst_video_time_code_add_frames (&start_timecode, component->start_timecode);
break;
}
for (i = 0; i < current_package->n_tracks; i++) {
MXFMetadataTimelineTrack *track = NULL;
MXFMetadataSequence *sequence;
@ -1157,6 +1212,8 @@ gst_mxf_demux_update_tracks (GstMXFDemux * demux)
pad->material_package = current_package;
pad->material_track = track;
pad->start_timecode = start_timecode;
/* If we just added the pad initialize for the current component */
if (first_run && MXF_IS_METADATA_MATERIAL_PACKAGE (current_package)) {
pad->current_component_index = 0;
@ -1880,6 +1937,15 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET_NONE;
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_NONE;
if (pad->material_track->parent.type == MXF_METADATA_TRACK_PICTURE_ESSENCE
&& pad->start_timecode.config.fps_n != 0
&& pad->start_timecode.config.fps_d != 0) {
GstVideoTimeCode timecode = pad->start_timecode;
gst_video_time_code_add_frames (&timecode,
pad->current_material_track_position);
gst_buffer_add_video_time_code_meta (outbuf, &timecode);
}
/* Update accumulated error and compensate */
{
guint64 abs_error =

3
gst/mxf/mxfdemux.h
View file

@ -23,6 +23,7 @@
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/base/gstflowcombiner.h>
#include <gst/video/video.h>
#include "mxfessence.h"
@ -126,6 +127,8 @@ struct _GstMXFDemuxPad
MXFMetadataGenericPackage *material_package;
MXFMetadataTimelineTrack *material_track;
GstVideoTimeCode start_timecode;
guint current_component_index;
MXFMetadataSourceClip *current_component;