From: Sebastian Dröge <sebastian.droege@collabora.co.uk>
Date: Sun, 8 Feb 2009 20:23:03 +0000 (+0100)
Subject: mxfdemux: Correctly implement timestamping in all cases
X-Git-Tag: 1.19.3~507^2~19568
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2b566be795ef223d7ef82650ab2bbfcffdc094a8;p=platform%2Fupstream%2Fgstreamer.git

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.
---

diff --git a/gst/mxf/mxfdemux.c b/gst/mxf/mxfdemux.c
index 0753d97..bb2f4f1 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 db1b439..3bdb2cb 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;