Hacking ffvp9 decoder support for profiling.

media/filters/ffmpeg_demuxer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/filters/ffmpeg_demuxer.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/base64.h"
@@ skipping 507 matching lines @@
     // go backwards in time.
     //
     // If the new link starts with a negative timestamp or a timestamp less than
     // the original (positive) |start_time|, we will get a negative timestamp
     // here.  It's also possible FFmpeg returns kNoTimestamp() here if it's not
     // able to work out a timestamp using the previous link and the next.
     //
     // Fixing chained ogg is non-trivial, so for now just reuse the last good
     // timestamp.  The decoder will rewrite the timestamps to be sample accurate
     // later.  See http://crbug.com/396864.
-    if (fixup_negative_timestamps_ &&
-        (buffer->timestamp() == kNoTimestamp() ||
-         buffer->timestamp() < last_packet_timestamp_)) {
+    //
+    // TODO(dalecurtis): ffvp9 packet parser generates AV_NOPTS packets when a
+    // superframe is split, so adjust timestamps here...
+    // TODO(chcunningham): It may be that some super frame parts are correct to
+    // have PTS as they aren't intended for rendering.
+    if ((fixup_negative_timestamps_ || buffer->timestamp() == kNoTimestamp()) &&
+        (buffer->timestamp() < last_packet_timestamp_)) {
       buffer->set_timestamp(last_packet_timestamp_ +
                             (last_packet_duration_ != kNoTimestamp()
                                  ? last_packet_duration_
                                  : base::TimeDelta::FromMicroseconds(1)));
     }
 
     // The demuxer should always output positive timestamps.
     DCHECK(buffer->timestamp() >= base::TimeDelta());
     DCHECK(buffer->timestamp() != kNoTimestamp());
 
@@ skipping 1048 matching lines @@
 
 void FFmpegDemuxer::SetLiveness(DemuxerStream::Liveness liveness) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   for (const auto& stream : streams_) {  // |stream| is a ref to a pointer.
     if (stream)
       stream->SetLiveness(liveness);
   }
 }
 
 }  // namespace media