Implement ISO BMFF support in Media Source.

media/mp4/track_run_iterator.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/mp4/track_run_iterator.h"
 
 #include <algorithm>
 
 #include "media/base/stream_parser_buffer.h"
 #include "media/mp4/rcheck.h"
 
 namespace media {
 namespace mp4 {
 
 base::TimeDelta TimeDeltaFromFrac(int64 numer, uint64 denom) {
-  DCHECK_LT(std::abs(numer), kint64max / base::Time::kMicrosecondsPerSecond);
+  DCHECK_LT((numer > 0 ? numer : -numer),
+            kint64max / base::Time::kMicrosecondsPerSecond);
   return base::TimeDelta::FromMicroseconds(
         base::Time::kMicrosecondsPerSecond * numer / denom);
 }
 
 static const uint32 kSampleIsDifferenceSampleFlagMask = 0x10000;
 
 TrackRunInfo::TrackRunInfo() {}
 TrackRunInfo::~TrackRunInfo() {}
 
 TrackRunIterator::TrackRunIterator() {}
@@ skipping 226 matching lines @@
   return sample_itr_->is_keyframe;
 }
 
 const FrameCENCInfo& TrackRunIterator::frame_cenc_info() {
   DCHECK(is_encrypted());
   return frame_cenc_info_;
 }
 
 }  // namespace mp4
 }  // namespace media