From 2b566be795ef223d7ef82650ab2bbfcffdc094a8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= Date: Sun, 8 Feb 2009 21:23:03 +0100 Subject: mxfdemux: Correctly implement timestamping in all cases When the material package track and source package track edit rate are different the source package track edit rate applies to the stored essence and the material track edit rate only applies to the values in the track's sequence and components. --- gst/mxf/mxfdemux.c | 66 +++++++++++++++++++++++++++++++++++++----------------- gst/mxf/mxfdemux.h | 1 + 2 files changed, 46 insertions(+), 21 deletions(-) (limited to 'gst') diff --git a/gst/mxf/mxfdemux.c b/gst/mxf/mxfdemux.c index 0753d974..bb2f4f19 100644 --- a/gst/mxf/mxfdemux.c +++ b/gst/mxf/mxfdemux.c @@ -1087,13 +1087,24 @@ 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; + + if (component->parent.duration >= -1) + pad->current_component_duration = component->parent.duration; + else + pad->current_component_duration = -1; + if (track->edit_rate.n != source_track->edit_rate.n || track->edit_rate.n != source_track->edit_rate.n) { - pad->current_component_start += gst_util_uint64_scale (component->start_position, source_track->edit_rate.n * track->edit_rate.d, source_track->edit_rate.d * track->edit_rate.n); + + if (pad->current_component_duration != -1) + pad->current_component_duration = + gst_util_uint64_scale (pad->current_component_duration, + source_track->edit_rate.n * track->edit_rate.d, + source_track->edit_rate.d * track->edit_rate.n); } else { pad->current_component_start += component->start_position; } @@ -1435,13 +1446,23 @@ gst_mxf_demux_pad_set_component (GstMXFDemux * demux, GstMXFDemuxPad * pad, } pad->current_component_start = source_track->origin; + if (pad->current_component->parent.duration >= -1) + pad->current_component_duration = pad->current_component->parent.duration; + else + pad->current_component_duration = -1; + if (pad->material_track->edit_rate.n != source_track->edit_rate.n || pad->material_track->edit_rate.n != source_track->edit_rate.n) { - pad->current_component_start += gst_util_uint64_scale (pad->current_component->start_position, source_track->edit_rate.n * pad->material_track->edit_rate.d, source_track->edit_rate.d * pad->material_track->edit_rate.n); + + if (pad->current_component_duration != -1) + pad->current_component_duration = + gst_util_uint64_scale (pad->current_component_duration, + source_track->edit_rate.n * pad->material_track->edit_rate.d, + source_track->edit_rate.d * pad->material_track->edit_rate.n); } else { pad->current_component_start += pad->current_component->start_position; } @@ -1648,22 +1669,21 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux, outbuf = gst_buffer_create_sub (inbuf, 0, GST_BUFFER_SIZE (inbuf)); GST_BUFFER_TIMESTAMP (outbuf) = pad->last_stop; - /* FIXME: What about tracks with source track edit rate != material - * track edit rate? Use one of them and set the relative rate - * to the other one as "rate" for the segment? - */ GST_BUFFER_DURATION (outbuf) = - gst_util_uint64_scale (GST_SECOND, pad->material_track->edit_rate.d, - pad->material_track->edit_rate.n); + gst_util_uint64_scale (GST_SECOND, + pad->current_essence_track->source_track->edit_rate.d, + pad->current_essence_track->source_track->edit_rate.n); GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET_NONE; GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_NONE; /* Update accumulated error and compensate */ { - guint64 abs_error = (GST_SECOND * pad->material_track->edit_rate.d) % - pad->material_track->edit_rate.n; + guint64 abs_error = + (GST_SECOND * pad->current_essence_track->source_track->edit_rate.d) % + pad->current_essence_track->source_track->edit_rate.n; pad->last_stop_accumulated_error += - ((gdouble) abs_error) / ((gdouble) pad->material_track->edit_rate.n); + ((gdouble) abs_error) / + ((gdouble) pad->current_essence_track->source_track->edit_rate.n); } if (pad->last_stop_accumulated_error >= 1.0) { GST_BUFFER_DURATION (outbuf) += 1; @@ -1715,9 +1735,9 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux, pad->current_essence_track_position++; if (pad->current_component) { - if (pad->current_component->parent.duration > 0 && + if (pad->current_component_duration > 0 && pad->current_essence_track_position - pad->current_component_start - >= pad->current_component->parent.duration) { + >= pad->current_component_duration) { GST_DEBUG_OBJECT (demux, "Switching to next component"); ret = @@ -2928,22 +2948,25 @@ gst_mxf_demux_pad_set_last_stop (GstMXFDemux * demux, GstMXFDemuxPad * p, p->material_track->edit_rate.d * GST_SECOND, p->material_track->edit_rate.n); - p->last_stop = start; - p->last_stop_accumulated_error = 0.0; start -= sum; + p->last_stop = sum + gst_util_uint64_scale (start, + GST_SECOND * p->material_track->edit_rate.d, + p->material_track->edit_rate.n);; + p->last_stop_accumulated_error = 0.0; if (gst_mxf_demux_pad_set_component (demux, p, i) != GST_FLOW_OK) { p->eos = TRUE; } - p->current_essence_track_position = - gst_util_uint64_scale (start, p->material_track->edit_rate.n, - p->material_track->edit_rate.d * GST_SECOND); + p->current_essence_track_position += + gst_util_uint64_scale (start, + p->current_essence_track->source_track->edit_rate.n, + p->current_essence_track->source_track->edit_rate.d * GST_SECOND); if (p->current_essence_track_position >= p->current_essence_track->duration && p->current_essence_track->duration > 0) { p->eos = TRUE; - p->current_essence_track_position = p->current_component->parent.duration; + p->current_essence_track_position = p->current_essence_track->duration; p->last_stop = sum + gst_util_uint64_scale (p->current_component->parent.duration, p->material_track->edit_rate.d * GST_SECOND, @@ -3174,8 +3197,9 @@ gst_mxf_demux_seek_pull (GstMXFDemux * demux, GstEvent * event) if (position != p->current_essence_track_position) { p->last_flow -= gst_util_uint64_scale (p->current_essence_track_position - - position, GST_SECOND * p->material_track->edit_rate.d, - p->material_track->edit_rate.d); + position, + GST_SECOND * p->current_essence_track->source_track->edit_rate.d, + p->current_essence_track->source_track->edit_rate.d); } p->current_essence_track_position = position; } diff --git a/gst/mxf/mxfdemux.h b/gst/mxf/mxfdemux.h index db1b4390..3bdb2cbb 100644 --- a/gst/mxf/mxfdemux.h +++ b/gst/mxf/mxfdemux.h @@ -109,6 +109,7 @@ struct _GstMXFDemuxPad MXFMetadataSourceClip *current_component; gint64 current_component_start; + gint64 current_component_duration; GstMXFDemuxEssenceTrack *current_essence_track; gint64 current_essence_track_position; -- cgit v1.2.1