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mxfdemux: Keep track of component start positions and material track positions

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This allows us to know exactly where in the material track we are, and
how to convert from a PTS for a source track to the actual PTS of the
material track (i.e. by adding the component start position).

https://bugzilla.gnome.org/show_bug.cgi?id=785119
This commit is contained in:
Sebastian Dröge 2017-07-24 16:21:31 +03:00
parent 819406b563
commit c2ef63a3bc
2 changed files with 60 additions and 37 deletions
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88
gst/mxf/mxfdemux.c
View file

@ -108,6 +108,7 @@ static void
gst_mxf_demux_pad_init (GstMXFDemuxPad * pad)
{
pad->position = 0;
pad->current_material_track_position = 0;
}
enum
@ -1010,7 +1011,7 @@ gst_mxf_demux_update_tracks (GstMXFDemux * demux)
MXF_METADATA_SOURCE_CLIP (sequence->structural_components
[component_index]);
if (!component) {
GST_WARNING_OBJECT (demux, "NULL conponent in non source package");
GST_WARNING_OBJECT (demux, "NULL component in non-source package");
if (!pad) {
continue;
} else {
@ -1160,6 +1161,7 @@ gst_mxf_demux_update_tracks (GstMXFDemux * demux)
if (first_run && MXF_IS_METADATA_MATERIAL_PACKAGE (current_package)) {
pad->current_component_index = 0;
pad->current_component_start = source_track->origin;
pad->current_component_start_position = 0;
if (component->parent.duration >= -1)
pad->current_component_duration = component->parent.duration;
@ -1569,7 +1571,13 @@ gst_mxf_demux_pad_set_component (GstMXFDemux * demux, GstMXFDemuxPad * pad,
return GST_FLOW_ERROR;
}
pad->current_component_start = source_track->origin;
pad->current_component_start_position = 0;
for (k = 0; k < i; k++) {
pad->current_component_start_position +=
MXF_METADATA_SOURCE_CLIP (sequence->structural_components[k])->
parent.duration;
}
if (pad->current_component->parent.duration >= -1)
pad->current_component_duration = pad->current_component->parent.duration;
else
@ -1592,7 +1600,6 @@ gst_mxf_demux_pad_set_component (GstMXFDemux * demux, GstMXFDemuxPad * pad,
}
pad->current_essence_track_position = pad->current_component_start;
pad_caps = gst_pad_get_current_caps (GST_PAD_CAST (pad));
if (!gst_caps_is_equal (pad_caps, pad->current_essence_track->caps)) {
gst_pad_set_caps (GST_PAD_CAST (pad), pad->current_essence_track->caps);
@ -1852,14 +1859,19 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
gst_buffer_get_size (inbuf));
GST_BUFFER_DTS (outbuf) = pad->position;
if (etrack->intra_only)
if (etrack->intra_only) {
GST_BUFFER_PTS (outbuf) = pad->position;
else if (pts != G_MAXUINT64)
} else if (pts != G_MAXUINT64) {
GST_BUFFER_PTS (outbuf) = gst_util_uint64_scale (pts * GST_SECOND,
pad->current_essence_track->source_track->edit_rate.d,
pad->current_essence_track->source_track->edit_rate.n);
else
GST_BUFFER_PTS (outbuf) +=
gst_util_uint64_scale (pad->current_component_start_position *
GST_SECOND, pad->current_essence_track->source_track->edit_rate.d,
pad->current_essence_track->source_track->edit_rate.n);
} else {
GST_BUFFER_PTS (outbuf) = GST_CLOCK_TIME_NONE;
}
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale (GST_SECOND,
@ -1901,6 +1913,7 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
}
pad->position += GST_BUFFER_DURATION (outbuf);
pad->current_material_track_position++;
GST_DEBUG_OBJECT (demux,
"Pushing buffer of size %" G_GSIZE_FORMAT " for track %u: pts %"
@ -3350,7 +3363,7 @@ gst_mxf_demux_pad_set_position (GstMXFDemux * demux, GstMXFDemuxPad * p,
GstClockTime start)
{
guint i;
GstClockTime sum = 0;
guint64 sum = 0;
MXFMetadataSourceClip *clip = NULL;
if (!p->current_component) {
@ -3369,6 +3382,7 @@ gst_mxf_demux_pad_set_position (GstMXFDemux * demux, GstMXFDemuxPad * p,
p->position = start;
}
p->position_accumulated_error = 0.0;
p->current_material_track_position = p->current_essence_track_position;
return;
}
@ -3382,30 +3396,30 @@ gst_mxf_demux_pad_set_position (GstMXFDemux * demux, GstMXFDemuxPad * p,
if (clip->parent.duration <= 0)
break;
sum +=
gst_util_uint64_scale (clip->parent.duration,
p->material_track->edit_rate.d * GST_SECOND,
p->material_track->edit_rate.n);
sum += clip->parent.duration;
if (sum > start)
if (gst_util_uint64_scale (sum, p->material_track->edit_rate.d * GST_SECOND,
p->material_track->edit_rate.n) > start)
break;
}
if (i == p->material_track->parent.sequence->n_structural_components) {
p->position = sum;
p->position =
gst_util_uint64_scale (sum, p->material_track->edit_rate.d * GST_SECOND,
p->material_track->edit_rate.n);
p->position_accumulated_error = 0.0;
p->current_material_track_position = sum;
gst_mxf_demux_pad_set_component (demux, p, i);
return;
}
if (clip->parent.duration > 0)
sum -=
gst_util_uint64_scale (clip->parent.duration,
p->material_track->edit_rate.d * GST_SECOND,
p->material_track->edit_rate.n);
sum -= clip->parent.duration;
start -= sum;
start -=
gst_util_uint64_scale (sum, p->material_track->edit_rate.d * GST_SECOND,
p->material_track->edit_rate.n);
gst_mxf_demux_pad_set_component (demux, p, i);
@ -3416,19 +3430,25 @@ gst_mxf_demux_pad_set_position (GstMXFDemux * demux, GstMXFDemuxPad * p,
p->current_essence_track_position += essence_offset;
p->position = sum + gst_util_uint64_scale (essence_offset,
p->position = gst_util_uint64_scale (sum,
GST_SECOND * p->material_track->edit_rate.d,
p->material_track->edit_rate.n);
p->material_track->edit_rate.n) + gst_util_uint64_scale (essence_offset,
GST_SECOND * p->current_essence_track->source_track->edit_rate.d,
p->current_essence_track->source_track->edit_rate.n);
p->position_accumulated_error = 0.0;
p->current_material_track_position = sum + essence_offset;
}
if (p->current_essence_track_position >= p->current_essence_track->duration
&& p->current_essence_track->duration > 0) {
p->current_essence_track_position = p->current_essence_track->duration;
p->position =
sum + gst_util_uint64_scale (p->current_component->parent.duration,
gst_util_uint64_scale (sum + p->current_component->parent.duration,
p->material_track->edit_rate.d * GST_SECOND,
p->material_track->edit_rate.n);
p->position_accumulated_error = 0.0;
p->current_material_track_position =
sum + p->current_component->parent.duration;
}
}
@ -3823,6 +3843,14 @@ gst_mxf_demux_seek_pull (GstMXFDemux * demux, GstEvent * event)
position,
GST_SECOND * p->current_essence_track->source_track->edit_rate.d,
p->current_essence_track->source_track->edit_rate.n);
p->position_accumulated_error = 0.0;
p->current_material_track_position -=
gst_util_uint64_scale (p->current_essence_track_position -
position,
p->material_track->edit_rate.n *
p->current_essence_track->source_track->edit_rate.d,
p->material_track->edit_rate.d *
p->current_essence_track->source_track->edit_rate.n);
}
p->current_essence_track_position = position;
@ -3970,22 +3998,10 @@ gst_mxf_demux_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT)
goto error;
pos = mxfpad->position;
g_rw_lock_reader_lock (&demux->metadata_lock);
if (format == GST_FORMAT_DEFAULT && pos != GST_CLOCK_TIME_NONE) {
if (!mxfpad->material_track || mxfpad->material_track->edit_rate.n == 0
|| mxfpad->material_track->edit_rate.d == 0) {
g_rw_lock_reader_unlock (&demux->metadata_lock);
goto error;
}
pos =
gst_util_uint64_scale (pos,
mxfpad->material_track->edit_rate.n,
mxfpad->material_track->edit_rate.d * GST_SECOND);
}
g_rw_lock_reader_unlock (&demux->metadata_lock);
format ==
GST_FORMAT_DEFAULT ? mxfpad->current_material_track_position :
mxfpad->position;
GST_DEBUG_OBJECT (pad,
"Returning position %" G_GINT64_FORMAT " in format %s", pos,

7
gst/mxf/mxfdemux.h
View file

@ -116,6 +116,9 @@ struct _GstMXFDemuxPad
GstClockTime position;
gdouble position_accumulated_error;
/* Current position in the material track */
gint64 current_material_track_position;
gboolean eos, discont;
GstTagList *tags;
@ -126,6 +129,10 @@ struct _GstMXFDemuxPad
guint current_component_index;
MXFMetadataSourceClip *current_component;
/* Position in the material track where this component started */
gint64 current_component_start_position;
/* Position/duration in the source track */
gint64 current_component_start;
gint64 current_component_duration;