Suppress slider thumb jumping around during seeking...

media/filters/ffmpeg_demuxer.cc

 // Copyright (c) 2009 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 "base/scoped_ptr.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "media/base/filter_host.h"
 #include "media/filters/ffmpeg_common.h"
@@ skipping 189 matching lines @@
   if (discontinuous_) {
     buffer->SetDiscontinuous(true);
     discontinuous_ = false;
   }
 
   // Execute the callback.
   read_callback->Run(buffer);
 }
 
 base::TimeDelta FFmpegDemuxerStream::ConvertTimestamp(int64 timestamp) {
+  if (timestamp == AV_NOPTS_VALUE)
+    return StreamSample::kInvalidTimestamp;
   AVRational time_base = { 1, base::Time::kMicrosecondsPerSecond };
   int64 microseconds = av_rescale_q(timestamp, stream_->time_base, time_base);
   return base::TimeDelta::FromMicroseconds(microseconds);
 }
 
 //
 // FFmpegDemuxer
 //
 FFmpegDemuxer::FFmpegDemuxer()
     : format_context_(NULL),
@@ skipping 356 matching lines @@
   read_event_.Wait();
   return last_read_bytes_;
 }
 
 void FFmpegDemuxer::SignalReadCompleted(size_t size) {
   last_read_bytes_ = size;
   read_event_.Signal();
 }
 
 }  // namespace media