From 2dbe7063302eb8140652efe46a29cf411c2e978d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian.droege@collabora.co.uk>
Date: Thu, 29 Jan 2009 15:55:44 +0100
Subject: [PATCH] Only push buffers for pads that are not more than 500ms
 before other pads

---
 gst/mxf/mxfdemux.c | 41 +++++++++++++++++++++++++++--------------
 1 file changed, 27 insertions(+), 14 deletions(-)

diff --git a/gst/mxf/mxfdemux.c b/gst/mxf/mxfdemux.c
index afd541a2da..eac597f7af 100644
--- a/gst/mxf/mxfdemux.c
+++ b/gst/mxf/mxfdemux.c
@@ -609,11 +609,11 @@ gst_mxf_demux_choose_package (GstMXFDemux * demux)
 
   for (i = 0; i < demux->preface->content_storage->n_packages; i++) {
     if (demux->preface->content_storage->packages[i] &&
-        MXF_IS_METADATA_MATERIAL_PACKAGE (demux->preface->
-            content_storage->packages[i])) {
+        MXF_IS_METADATA_MATERIAL_PACKAGE (demux->preface->content_storage->
+            packages[i])) {
       ret =
-          MXF_METADATA_GENERIC_PACKAGE (demux->preface->
-          content_storage->packages[i]);
+          MXF_METADATA_GENERIC_PACKAGE (demux->preface->content_storage->
+          packages[i]);
       break;
     }
   }
@@ -1257,8 +1257,8 @@ gst_mxf_demux_pad_next_component (GstMXFDemux * demux, GstMXFDemuxPad * pad)
       pad->current_component_index);
 
   pad->current_component =
-      MXF_METADATA_SOURCE_CLIP (sequence->
-      structural_components[pad->current_component_index]);
+      MXF_METADATA_SOURCE_CLIP (sequence->structural_components[pad->
+          current_component_index]);
   if (pad->current_component == NULL) {
     GST_ERROR_OBJECT (demux, "No such structural component");
     return GST_FLOW_ERROR;
@@ -1266,8 +1266,8 @@ gst_mxf_demux_pad_next_component (GstMXFDemux * demux, GstMXFDemuxPad * pad)
 
   if (!pad->current_component->source_package
       || !pad->current_component->source_package->top_level
-      || !MXF_METADATA_GENERIC_PACKAGE (pad->
-          current_component->source_package)->tracks) {
+      || !MXF_METADATA_GENERIC_PACKAGE (pad->current_component->
+          source_package)->tracks) {
     GST_ERROR_OBJECT (demux, "Invalid component");
     return GST_FLOW_ERROR;
   }
@@ -1492,6 +1492,7 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
 
   for (i = 0; i < demux->src->len; i++) {
     GstMXFDemuxPad *pad = g_ptr_array_index (demux->src, i);
+    guint j;
 
     if (pad->current_essence_track != etrack)
       continue;
@@ -1506,6 +1507,19 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
       continue;
     }
 
+    for (j = 0; j < demux->src->len; j++) {
+      GstMXFDemuxPad *opad = g_ptr_array_index (demux->src, j);
+
+      if (!opad->eos && opad->last_stop < pad->last_stop &&
+          pad->last_stop - opad->last_stop > 500 * GST_MSECOND) {
+        break;
+      }
+    }
+    if (j != demux->src->len) {
+      GST_DEBUG_OBJECT (demux, "Pad is too far ahead of time");
+      continue;
+    }
+
     /* Create another subbuffer to have writable metadata */
     outbuf = gst_buffer_create_sub (inbuf, 0, GST_BUFFER_SIZE (inbuf));
 
@@ -1582,7 +1596,6 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
     }
 
     if (ret == GST_FLOW_UNEXPECTED) {
-      gboolean eos = TRUE;
 
       GST_DEBUG_OBJECT (demux, "EOS for track");
       pad->eos = TRUE;
@@ -1591,15 +1604,15 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
       for (i = 0; i < demux->src->len; i++) {
         GstMXFDemuxPad *opad = g_ptr_array_index (demux->src, i);
 
-        eos &= opad->eos;
+        if (!opad->eos) {
+          ret = GST_FLOW_OK;
+          break;
+        }
       }
 
-      if (eos) {
+      if (ret == GST_FLOW_UNEXPECTED) {
         GST_DEBUG_OBJECT (demux, "All tracks are EOS");
-        ret = GST_FLOW_UNEXPECTED;
         break;
-      } else {
-        ret = GST_FLOW_OK;
       }
     }