The Tor Browser: content/media/encoder/fmp4_muxer/ISOMediaBoxes.cpp@6474c204b198 (annotated)

content/media/encoder/fmp4_muxer/ISOMediaBoxes.cpp@6474c204b198 (annotated)

content/media/encoder/fmp4_muxer/ISOMediaBoxes.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include <climits>
 #include "TrackMetadataBase.h"
 #include "ISOMediaBoxes.h"
 #include "ISOControl.h"
 #include "ISOMediaWriter.h"
 #include "EncodedFrameContainer.h"
 #include "ISOTrackMetadata.h"
 #include "MP4ESDS.h"
 #include "AMRBox.h"
 #include "AVCBox.h"
 #include "VideoUtils.h"
 namespace mozilla {
 // 14496-12 6.2.2 'Data Types and fields'
 const uint32_t iso_matrix[] = { 0x00010000, 0,          0,
 ,          0x00010000, 0,
 ,          0,          0x40000000 };
 uint32_t
 set_sample_flags(bool aSync)
 {
   std::bitset<32> flags;
   flags.set(16, !aSync);
   return flags.to_ulong();
 }
 Box::BoxSizeChecker::BoxSizeChecker(ISOControl* aControl, uint32_t aSize)
 {
   mControl = aControl;
   ori_size = mControl->GetBufPos();
   box_size = aSize;
   MOZ_COUNT_CTOR(BoxSizeChecker);
 }
 Box::BoxSizeChecker::~BoxSizeChecker()
 {
   uint32_t cur_size = mControl->GetBufPos();
   if ((cur_size - ori_size) != box_size) {
     MOZ_ASSERT(false);
   }
   MOZ_COUNT_DTOR(BoxSizeChecker);
 }
 nsresult
 MediaDataBox::Generate(uint32_t* aBoxSize)
 {
   mFirstSampleOffset = size;
   mAllSampleSize = 0;
   if (mTrackType & Audio_Track) {
     FragmentBuffer* frag = mControl->GetFragment(Audio_Track);
     mAllSampleSize += frag->GetFirstFragmentSampleSize();
   }
   if (mTrackType & Video_Track) {
     FragmentBuffer* frag = mControl->GetFragment(Video_Track);
     mAllSampleSize += frag->GetFirstFragmentSampleSize();
   }
   size += mAllSampleSize;
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 MediaDataBox::Write()
 {
   nsresult rv;
   BoxSizeChecker checker(mControl, size);
   Box::Write();
   nsTArray<uint32_t> types;
   types.AppendElement(Audio_Track);
   types.AppendElement(Video_Track);
   for (uint32_t l = 0; l < types.Length(); l++) {
     if (mTrackType & types[l]) {
       FragmentBuffer* frag = mControl->GetFragment(types[l]);
       nsTArray<nsRefPtr<EncodedFrame>> frames;
       // Here is the last time we get fragment frames, flush it!
       rv = frag->GetFirstFragment(frames, true);
       NS_ENSURE_SUCCESS(rv, rv);
       uint32_t len = frames.Length();
       for (uint32_t i = 0; i < len; i++) {
         nsTArray<uint8_t> frame_buffer;
         frames.ElementAt(i)->SwapOutFrameData(frame_buffer);
         mControl->WriteAVData(frame_buffer);
       }
     }
   }
   return NS_OK;
 }
 MediaDataBox::MediaDataBox(uint32_t aTrackType, ISOControl* aControl)
   : Box(NS_LITERAL_CSTRING("mdat"), aControl)
   , mAllSampleSize(0)
   , mFirstSampleOffset(0)
   , mTrackType(aTrackType)
 {
   MOZ_COUNT_CTOR(MediaDataBox);
 }
 MediaDataBox::~MediaDataBox()
 {
   MOZ_COUNT_DTOR(MediaDataBox);
 }
 uint32_t
 TrackRunBox::fillSampleTable()
 {
   uint32_t table_size = 0;
   nsresult rv;
   nsTArray<nsRefPtr<EncodedFrame>> frames;
   FragmentBuffer* frag = mControl->GetFragment(mTrackType);
   rv = frag->GetFirstFragment(frames);
   if (NS_FAILED(rv)) {
     return 0;
   }
   uint32_t len = frames.Length();
   sample_info_table = new tbl[len];
   // Create sample table according to 14496-12 8.8.8.2.
   for (uint32_t i = 0; i < len; i++) {
     // Sample size.
     sample_info_table[i].sample_size = 0;
     if (flags.to_ulong() & flags_sample_size_present) {
       sample_info_table[i].sample_size = frames.ElementAt(i)->GetFrameData().Length();
       mAllSampleSize += sample_info_table[i].sample_size;
       table_size += sizeof(uint32_t);
     }
     // Sample flags.
     sample_info_table[i].sample_flags = 0;
     if (flags.to_ulong() & flags_sample_flags_present) {
       sample_info_table[i].sample_flags =
         set_sample_flags(
           (frames.ElementAt(i)->GetFrameType() == EncodedFrame::AVC_I_FRAME));
       table_size += sizeof(uint32_t);
     }
     // Sample duration.
     sample_info_table[i].sample_duration = 0;
     if (flags.to_ulong() & flags_sample_duration_present) {
       // Calculate each frame's duration, it is decided by "current frame
       // timestamp - last frame timestamp".
       uint64_t frame_time = 0;
       if (i == 0) {
         frame_time = frames.ElementAt(i)->GetTimeStamp() -
                      frag->GetLastFragmentLastFrameTime();
       } else {
         frame_time = frames.ElementAt(i)->GetTimeStamp() -
                      frames.ElementAt(i - 1)->GetTimeStamp();
         // Keep the last frame time of current fagment, it will be used to calculate
         // the first frame duration of next fragment.
         if ((len - 1) == i) {
           frag->SetLastFragmentLastFrameTime(frames.ElementAt(i)->GetTimeStamp());
         }
       }
       // In TrackRunBox, there should be exactly one type, either audio or video.
       MOZ_ASSERT((mTrackType & Video_Track) ^ (mTrackType & Audio_Track));
       sample_info_table[i].sample_duration = (mTrackType & Video_Track ?
         frame_time * mVideoMeta->GetVideoClockRate() / USECS_PER_S :
         frame_time * mAudioMeta->GetAudioSampleRate() / USECS_PER_S);
       table_size += sizeof(uint32_t);
     }
     sample_info_table[i].sample_composition_time_offset = 0;
   }
   return table_size;
 }
 nsresult
 TrackRunBox::Generate(uint32_t* aBoxSize)
 {
   FragmentBuffer* frag = mControl->GetFragment(mTrackType);
   sample_count = frag->GetFirstFragmentSampleNumber();
   size += sizeof(sample_count);
   // data_offset needs to be updated if there is other
   // TrackRunBox before this one.
   if (flags.to_ulong() & flags_data_offset_present) {
     data_offset = 0;
     size += sizeof(data_offset);
   }
   size += fillSampleTable();
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 TrackRunBox::SetDataOffset(uint32_t aOffset)
 {
   data_offset = aOffset;
   return NS_OK;
 }
 nsresult
 TrackRunBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(sample_count);
   if (flags.to_ulong() & flags_data_offset_present) {
     mControl->Write(data_offset);
   }
   for (uint32_t i = 0; i < sample_count; i++) {
     if (flags.to_ulong() & flags_sample_duration_present) {
       mControl->Write(sample_info_table[i].sample_duration);
     }
     if (flags.to_ulong() & flags_sample_size_present) {
       mControl->Write(sample_info_table[i].sample_size);
     }
     if (flags.to_ulong() & flags_sample_flags_present) {
       mControl->Write(sample_info_table[i].sample_flags);
     }
   }
   return NS_OK;
 }
 TrackRunBox::TrackRunBox(uint32_t aType, uint32_t aFlags, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("trun"), 0, aFlags, aControl)
   , sample_count(0)
   , data_offset(0)
   , first_sample_flags(0)
   , mAllSampleSize(0)
   , mTrackType(aType)
 {
   MOZ_COUNT_CTOR(TrackRunBox);
 }
 TrackRunBox::~TrackRunBox()
 {
   MOZ_COUNT_DTOR(TrackRunBox);
 }
 nsresult
 TrackFragmentHeaderBox::UpdateBaseDataOffset(uint64_t aOffset)
 {
   base_data_offset = aOffset;
   return NS_OK;
 }
 nsresult
 TrackFragmentHeaderBox::Generate(uint32_t* aBoxSize)
 {
   track_ID = (mTrackType == Audio_Track ?
                 mControl->GetTrackID(mAudioMeta->GetKind()) :
                 mControl->GetTrackID(mVideoMeta->GetKind()));
   size += sizeof(track_ID);
   if (flags.to_ulong() & base_data_offset_present) {
     // base_data_offset needs to add size of 'trun', 'tfhd' and
     // header of 'mdat' later.
     base_data_offset = 0;
     size += sizeof(base_data_offset);
   }
   if (flags.to_ulong() & default_sample_duration_present) {
     if (mTrackType == Video_Track) {
       if (!mVideoMeta->GetVideoFrameRate()) {
         // 0 means frame rate is variant, so it is wrong to write
         // default_sample_duration.
         MOZ_ASSERT(0);
         default_sample_duration = 0;
       } else {
         default_sample_duration = mVideoMeta->GetVideoClockRate() / mVideoMeta->GetVideoFrameRate();
       }
     } else if (mTrackType == Audio_Track) {
       default_sample_duration = mAudioMeta->GetAudioFrameDuration();
     } else {
       MOZ_ASSERT(0);
       return NS_ERROR_FAILURE;
     }
     size += sizeof(default_sample_duration);
   }
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 TrackFragmentHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(track_ID);
   if (flags.to_ulong() & base_data_offset_present) {
     mControl->Write(base_data_offset);
   }
   if (flags.to_ulong() & default_sample_duration_present) {
     mControl->Write(default_sample_duration);
   }
   return NS_OK;
 }
 TrackFragmentHeaderBox::TrackFragmentHeaderBox(uint32_t aType,
                                                uint32_t aFlags,
                                                ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("tfhd"), 0, aFlags, aControl)
   , track_ID(0)
   , base_data_offset(0)
   , default_sample_duration(0)
 {
   mTrackType = aType;
   MOZ_COUNT_CTOR(TrackFragmentHeaderBox);
 }
 TrackFragmentHeaderBox::~TrackFragmentHeaderBox()
 {
   MOZ_COUNT_DTOR(TrackFragmentHeaderBox);
 }
 TrackFragmentBox::TrackFragmentBox(uint32_t aType, ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("traf"), aControl)
   , mTrackType(aType)
 {
   // Flags in TrackFragmentHeaderBox.
   uint32_t tf_flags = base_data_offset_present;
   // Ideally, audio encoder generates audio frame in const rate. However, some
   // audio encoders don't do it so the audio frame duration needs to be checked
   // here.
   if ((mTrackType & Audio_Track) && mAudioMeta->GetAudioFrameDuration()) {
     tf_flags |= default_sample_duration_present;
   }
   boxes.AppendElement(new TrackFragmentHeaderBox(aType, tf_flags, aControl));
   // Always adds flags_data_offset_present in each TrackRunBox, Android
   // parser requires this flag to calculate the correct bitstream offset.
   uint32_t tr_flags = flags_sample_size_present | flags_data_offset_present;
   // Flags in TrackRunBox.
   // If there is no default sample duration exists, each frame duration needs to
   // be recored in the TrackRunBox.
   tr_flags |= (tf_flags & default_sample_duration_present ? 0 : flags_sample_duration_present);
   // For video, add sample_flags to record I frame.
   tr_flags |= (mTrackType & Video_Track ? flags_sample_flags_present : 0);
   boxes.AppendElement(new TrackRunBox(mTrackType, tr_flags, aControl));
   MOZ_COUNT_CTOR(TrackFragmentBox);
 }
 TrackFragmentBox::~TrackFragmentBox()
 {
   MOZ_COUNT_DTOR(TrackFragmentBox);
 }
 nsresult
 MovieFragmentHeaderBox::Generate(uint32_t* aBoxSize)
 {
   sequence_number = mControl->GetCurFragmentNumber();
   size += sizeof(sequence_number);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 MovieFragmentHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(sequence_number);
   return NS_OK;
 }
 MovieFragmentHeaderBox::MovieFragmentHeaderBox(uint32_t aTrackType,
                                                ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("mfhd"), 0, 0, aControl)
   , sequence_number(0)
   , mTrackType(aTrackType)
 {
   MOZ_COUNT_CTOR(MovieFragmentHeaderBox);
 }
 MovieFragmentHeaderBox::~MovieFragmentHeaderBox()
 {
   MOZ_COUNT_DTOR(MovieFragmentHeaderBox);
 }
 MovieFragmentBox::MovieFragmentBox(uint32_t aType, ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("moof"), aControl)
   , mTrackType(aType)
 {
   boxes.AppendElement(new MovieFragmentHeaderBox(mTrackType, aControl));
   if (mTrackType & Audio_Track) {
     boxes.AppendElement(
       new TrackFragmentBox(Audio_Track, aControl));
   }
   if (mTrackType & Video_Track) {
     boxes.AppendElement(
       new TrackFragmentBox(Video_Track, aControl));
   }
   MOZ_COUNT_CTOR(MovieFragmentBox);
 }
 MovieFragmentBox::~MovieFragmentBox()
 {
   MOZ_COUNT_DTOR(MovieFragmentBox);
 }
 nsresult
 MovieFragmentBox::Generate(uint32_t* aBoxSize)
 {
   nsresult rv = DefaultContainerImpl::Generate(aBoxSize);
   NS_ENSURE_SUCCESS(rv, rv);
   // Correct data_offset if there are both audio and video track in
   // this fragment. This offset means the offset in the MediaDataBox.
   if (mTrackType & (Audio_Track | Video_Track)) {
     nsTArray<nsRefPtr<MuxerOperation>> truns;
     rv = Find(NS_LITERAL_CSTRING("trun"), truns);
     NS_ENSURE_SUCCESS(rv, rv);
     uint32_t len = truns.Length();
     uint32_t data_offset = 0;
     for (uint32_t i = 0; i < len; i++) {
       TrackRunBox* trun = (TrackRunBox*) truns.ElementAt(i).get();
       rv = trun->SetDataOffset(data_offset);
       NS_ENSURE_SUCCESS(rv, rv);
       data_offset += trun->GetAllSampleSize();
     }
   }
   return NS_OK;
 }
 nsresult
 TrackExtendsBox::Generate(uint32_t* aBoxSize)
 {
   track_ID = (mTrackType == Audio_Track ?
                 mControl->GetTrackID(mAudioMeta->GetKind()) :
                 mControl->GetTrackID(mVideoMeta->GetKind()));
   if (mTrackType == Audio_Track) {
     default_sample_description_index = 1;
     default_sample_duration = mAudioMeta->GetAudioFrameDuration();
     default_sample_size = mAudioMeta->GetAudioFrameSize();
     default_sample_flags = set_sample_flags(1);
   } else if (mTrackType == Video_Track) {
     default_sample_description_index = 1;
     // Video meta data has assigned framerate, it implies that this video's
     // frame rate should be fixed.
     if (mVideoMeta->GetVideoFrameRate()) {
       default_sample_duration =
         mVideoMeta->GetVideoClockRate() / mVideoMeta->GetVideoFrameRate();
     }
     default_sample_size = 0;
     default_sample_flags = set_sample_flags(0);
   } else {
     MOZ_ASSERT(0);
     return NS_ERROR_FAILURE;
   }
   size += sizeof(track_ID) +
           sizeof(default_sample_description_index) +
           sizeof(default_sample_duration) +
           sizeof(default_sample_size) +
           sizeof(default_sample_flags);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 TrackExtendsBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(track_ID);
   mControl->Write(default_sample_description_index);
   mControl->Write(default_sample_duration);
   mControl->Write(default_sample_size);
   mControl->Write(default_sample_flags);
   return NS_OK;
 }
 TrackExtendsBox::TrackExtendsBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("trex"), 0, 0, aControl)
   , track_ID(0)
   , default_sample_description_index(0)
   , default_sample_duration(0)
   , default_sample_size(0)
   , default_sample_flags(0)
   , mTrackType(aType)
 {
   MOZ_COUNT_CTOR(TrackExtendsBox);
 }
 TrackExtendsBox::~TrackExtendsBox()
 {
   MOZ_COUNT_DTOR(TrackExtendsBox);
 }
 MovieExtendsBox::MovieExtendsBox(ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("mvex"), aControl)
 {
   if (mAudioMeta) {
     boxes.AppendElement(new TrackExtendsBox(Audio_Track, aControl));
   }
   if (mVideoMeta) {
     boxes.AppendElement(new TrackExtendsBox(Video_Track, aControl));
   }
   MOZ_COUNT_CTOR(MovieExtendsBox);
 }
 MovieExtendsBox::~MovieExtendsBox()
 {
   MOZ_COUNT_DTOR(MovieExtendsBox);
 }
 nsresult
 ChunkOffsetBox::Generate(uint32_t* aBoxSize)
 {
   // We don't need time to sample table in fragmented mp4.
   entry_count = 0;
   size += sizeof(entry_count);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 ChunkOffsetBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(entry_count);
   return NS_OK;
 }
 ChunkOffsetBox::ChunkOffsetBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("stco"), 0, 0, aControl)
   , entry_count(0)
 {
   MOZ_COUNT_CTOR(ChunkOffsetBox);
 }
 ChunkOffsetBox::~ChunkOffsetBox()
 {
   MOZ_COUNT_DTOR(ChunkOffsetBox);
 }
 nsresult
 SampleToChunkBox::Generate(uint32_t* aBoxSize)
 {
   // We don't need time to sample table in fragmented mp4
   entry_count = 0;
   size += sizeof(entry_count);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 SampleToChunkBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(entry_count);
   return NS_OK;
 }
 SampleToChunkBox::SampleToChunkBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("stsc"), 0, 0, aControl)
   , entry_count(0)
 {
   MOZ_COUNT_CTOR(SampleToChunkBox);
 }
 SampleToChunkBox::~SampleToChunkBox()
 {
   MOZ_COUNT_DTOR(SampleToChunkBox);
 }
 nsresult
 TimeToSampleBox::Generate(uint32_t* aBoxSize)
 {
   // We don't need time to sample table in fragmented mp4.
   entry_count = 0;
   size += sizeof(entry_count);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 TimeToSampleBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(entry_count);
   return NS_OK;
 }
 TimeToSampleBox::TimeToSampleBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("stts"), 0, 0, aControl)
   , entry_count(0)
 {
   MOZ_COUNT_CTOR(TimeToSampleBox);
 }
 TimeToSampleBox::~TimeToSampleBox()
 {
   MOZ_COUNT_DTOR(TimeToSampleBox);
 }
 nsresult
 SampleDescriptionBox::Generate(uint32_t* aBoxSize)
 {
   entry_count = 1;
   size += sizeof(entry_count);
   nsresult rv;
   uint32_t box_size;
   rv = sample_entry_box->Generate(&box_size);
   NS_ENSURE_SUCCESS(rv, rv);
   size += box_size;
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 SampleDescriptionBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   nsresult rv;
   mControl->Write(entry_count);
   rv = sample_entry_box->Write();
   NS_ENSURE_SUCCESS(rv, rv);
   return NS_OK;
 }
 SampleDescriptionBox::SampleDescriptionBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("stsd"), 0, 0, aControl)
   , entry_count(0)
 {
   mTrackType = aType;
   switch (mTrackType) {
   case Audio_Track:
     {
       CreateAudioSampleEntry(sample_entry_box);
     }
     break;
   case Video_Track:
     {
       CreateVideoSampleEntry(sample_entry_box);
     }
     break;
   }
   MOZ_ASSERT(sample_entry_box);
   MOZ_COUNT_CTOR(SampleDescriptionBox);
 }
 nsresult
 SampleDescriptionBox::CreateAudioSampleEntry(nsRefPtr<SampleEntryBox>& aSampleEntry)
 {
   if (mAudioMeta->GetKind() == TrackMetadataBase::METADATA_AMR) {
     aSampleEntry = new AMRSampleEntry(mControl);
   } else if (mAudioMeta->GetKind() == TrackMetadataBase::METADATA_AAC) {
     aSampleEntry = new MP4AudioSampleEntry(mControl);
   } else {
     MOZ_ASSERT(0);
   }
   return NS_OK;
 }
 nsresult
 SampleDescriptionBox::CreateVideoSampleEntry(nsRefPtr<SampleEntryBox>& aSampleEntry)
 {
   if (mVideoMeta->GetKind() == TrackMetadataBase::METADATA_AVC) {
     aSampleEntry = new AVCSampleEntry(mControl);
   } else {
     MOZ_ASSERT(0);
   }
   return NS_OK;
 }
 SampleDescriptionBox::~SampleDescriptionBox()
 {
   MOZ_COUNT_DTOR(SampleDescriptionBox);
 }
 nsresult
 SampleSizeBox::Generate(uint32_t* aBoxSize)
 {
   size += sizeof(sample_size) +
           sizeof(sample_count);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 SampleSizeBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(sample_size);
   mControl->Write(sample_count);
   return NS_OK;
 }
 SampleSizeBox::SampleSizeBox(ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("stsz"), 0, 0, aControl)
   , sample_size(0)
   , sample_count(0)
 {
   MOZ_COUNT_CTOR(SampleSizeBox);
 }
 SampleSizeBox::~SampleSizeBox()
 {
   MOZ_COUNT_DTOR(SampleSizeBox);
 }
 SampleTableBox::SampleTableBox(uint32_t aType, ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("stbl"), aControl)
 {
   boxes.AppendElement(new SampleDescriptionBox(aType, aControl));
   boxes.AppendElement(new TimeToSampleBox(aType, aControl));
   boxes.AppendElement(new SampleToChunkBox(aType, aControl));
   boxes.AppendElement(new SampleSizeBox(aControl));
   boxes.AppendElement(new ChunkOffsetBox(aType, aControl));
   MOZ_COUNT_CTOR(SampleTableBox);
 }
 SampleTableBox::~SampleTableBox()
 {
   MOZ_COUNT_DTOR(SampleTableBox);
 }
 nsresult
 DataEntryUrlBox::Generate(uint32_t* aBoxSize)
 {
   // location is null here, do nothing
   size += location.Length();
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 DataEntryUrlBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   return NS_OK;
 }
 DataEntryUrlBox::DataEntryUrlBox()
   : FullBox(NS_LITERAL_CSTRING("url "), 0, 0, (ISOControl*) nullptr)
 {
   MOZ_COUNT_CTOR(DataEntryUrlBox);
 }
 DataEntryUrlBox::DataEntryUrlBox(ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("url "), 0, flags_media_at_the_same_file, aControl)
 {
   MOZ_COUNT_CTOR(DataEntryUrlBox);
 }
 DataEntryUrlBox::DataEntryUrlBox(const DataEntryUrlBox& aBox)
   : FullBox(aBox.boxType, aBox.version, aBox.flags.to_ulong(), aBox.mControl)
 {
   location = aBox.location;
   MOZ_COUNT_CTOR(DataEntryUrlBox);
 }
 DataEntryUrlBox::~DataEntryUrlBox()
 {
   MOZ_COUNT_DTOR(DataEntryUrlBox);
 }
 nsresult DataReferenceBox::Generate(uint32_t* aBoxSize)
 {
   entry_count = 1;  // only allow on entry here
   size += sizeof(uint32_t);
   for (uint32_t i = 0; i < entry_count; i++) {
     uint32_t box_size = 0;
     DataEntryUrlBox* url = new DataEntryUrlBox(mControl);
     url->Generate(&box_size);
     size += box_size;
     urls.AppendElement(url);
   }
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult DataReferenceBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(entry_count);
   for (uint32_t i = 0; i < entry_count; i++) {
     urls[i]->Write();
   }
   return NS_OK;
 }
 DataReferenceBox::DataReferenceBox(ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("dref"), 0, 0, aControl)
   , entry_count(0)
 {
   MOZ_COUNT_CTOR(DataReferenceBox);
 }
 DataReferenceBox::~DataReferenceBox()
 {
   MOZ_COUNT_DTOR(DataReferenceBox);
 }
 DataInformationBox::DataInformationBox(ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("dinf"), aControl)
 {
   boxes.AppendElement(new DataReferenceBox(aControl));
   MOZ_COUNT_CTOR(DataInformationBox);
 }
 DataInformationBox::~DataInformationBox()
 {
   MOZ_COUNT_DTOR(DataInformationBox);
 }
 nsresult
 VideoMediaHeaderBox::Generate(uint32_t* aBoxSize)
 {
   size += sizeof(graphicsmode) +
           sizeof(opcolor);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 VideoMediaHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(graphicsmode);
   mControl->WriteArray(opcolor, 3);
   return NS_OK;
 }
 VideoMediaHeaderBox::VideoMediaHeaderBox(ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("vmhd"), 0, 1, aControl)
   , graphicsmode(0)
 {
   memset(opcolor, 0 , sizeof(opcolor));
   MOZ_COUNT_CTOR(VideoMediaHeaderBox);
 }
 VideoMediaHeaderBox::~VideoMediaHeaderBox()
 {
   MOZ_COUNT_DTOR(VideoMediaHeaderBox);
 }
 nsresult
 SoundMediaHeaderBox::Generate(uint32_t* aBoxSize)
 {
   balance = 0;
   reserved = 0;
   size += sizeof(balance) +
           sizeof(reserved);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 SoundMediaHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(balance);
   mControl->Write(reserved);
   return NS_OK;
 }
 SoundMediaHeaderBox::SoundMediaHeaderBox(ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("smhd"), 0, 0, aControl)
 {
   MOZ_COUNT_CTOR(SoundMediaHeaderBox);
 }
 SoundMediaHeaderBox::~SoundMediaHeaderBox()
 {
   MOZ_COUNT_DTOR(SoundMediaHeaderBox);
 }
 MediaInformationBox::MediaInformationBox(uint32_t aType, ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("minf"), aControl)
 {
   mTrackType = aType;
   if (mTrackType == Audio_Track) {
     boxes.AppendElement(new SoundMediaHeaderBox(aControl));
   } else if (mTrackType == Video_Track) {
     boxes.AppendElement(new VideoMediaHeaderBox(aControl));
   } else {
     MOZ_ASSERT(0);
   }
   boxes.AppendElement(new DataInformationBox(aControl));
   boxes.AppendElement(new SampleTableBox(aType, aControl));
   MOZ_COUNT_CTOR(MediaInformationBox);
 }
 MediaInformationBox::~MediaInformationBox()
 {
   MOZ_COUNT_DTOR(MediaInformationBox);
 }
 nsresult
 HandlerBox::Generate(uint32_t* aBoxSize)
 {
   pre_defined = 0;
   if (mTrackType == Audio_Track) {
     handler_type = FOURCC('s', 'o', 'u', 'n');
   } else if (mTrackType == Video_Track) {
     handler_type = FOURCC('v', 'i', 'd', 'e');
   }
   size += sizeof(pre_defined) +
           sizeof(handler_type) +
           sizeof(reserved);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 HandlerBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(pre_defined);
   mControl->Write(handler_type);
   mControl->WriteArray(reserved, 3);
   return NS_OK;
 }
 HandlerBox::HandlerBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("hdlr"), 0, 0, aControl)
   , pre_defined(0)
   , handler_type(0)
 {
   mTrackType = aType;
   memset(reserved, 0 , sizeof(reserved));
   MOZ_COUNT_CTOR(HandlerBox);
 }
 HandlerBox::~HandlerBox()
 {
   MOZ_COUNT_DTOR(HandlerBox);
 }
 MediaHeaderBox::MediaHeaderBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("mdhd"), 0, 0, aControl)
   , creation_time(0)
   , modification_time(0)
   , timescale(0)
   , duration(0)
   , pad(0)
   , lang1(0)
   , lang2(0)
   , lang3(0)
   , pre_defined(0)
 {
   mTrackType = aType;
   MOZ_COUNT_CTOR(MediaHeaderBox);
 }
 MediaHeaderBox::~MediaHeaderBox()
 {
   MOZ_COUNT_DTOR(MediaHeaderBox);
 }
 uint32_t
 MediaHeaderBox::GetTimeScale()
 {
   if (mTrackType == Audio_Track) {
     return mAudioMeta->GetAudioSampleRate();
   }
   return mVideoMeta->GetVideoClockRate();
 }
 nsresult
 MediaHeaderBox::Generate(uint32_t* aBoxSize)
 {
   creation_time = mControl->GetTime();
   modification_time = mControl->GetTime();
   timescale = GetTimeScale();
   duration = 0; // fragmented mp4
   pad = 0;
   lang1 = 'u' - 0x60; // "und" underdetermined language
   lang2 = 'n' - 0x60;
   lang3 = 'd' - 0x60;
   size += (pad.size() + lang1.size() + lang2.size() + lang3.size()) / CHAR_BIT;
   pre_defined = 0;
   size += sizeof(creation_time) +
           sizeof(modification_time) +
           sizeof(timescale) +
           sizeof(duration) +
           sizeof(pre_defined);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 MediaHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(creation_time);
   mControl->Write(modification_time);
   mControl->Write(timescale);
   mControl->Write(duration);
   mControl->WriteBits(pad.to_ulong(), pad.size());
   mControl->WriteBits(lang1.to_ulong(), lang1.size());
   mControl->WriteBits(lang2.to_ulong(), lang2.size());
   mControl->WriteBits(lang3.to_ulong(), lang3.size());
   mControl->Write(pre_defined);
   return NS_OK;
 }
 MovieBox::MovieBox(ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("moov"), aControl)
 {
   boxes.AppendElement(new MovieHeaderBox(aControl));
   if (aControl->HasAudioTrack()) {
     boxes.AppendElement(new TrackBox(Audio_Track, aControl));
   }
   if (aControl->HasVideoTrack()) {
     boxes.AppendElement(new TrackBox(Video_Track, aControl));
   }
   boxes.AppendElement(new MovieExtendsBox(aControl));
   MOZ_COUNT_CTOR(MovieBox);
 }
 MovieBox::~MovieBox()
 {
   MOZ_COUNT_DTOR(MovieBox);
 }
 nsresult
 MovieHeaderBox::Generate(uint32_t* aBoxSize)
 {
   creation_time = mControl->GetTime();
   modification_time = mControl->GetTime();
   timescale = GetTimeScale();
   duration = 0;     // The duration is always 0 in fragmented mp4.
   next_track_ID = mControl->GetNextTrackID();
   size += sizeof(next_track_ID) +
           sizeof(creation_time) +
           sizeof(modification_time) +
           sizeof(timescale) +
           sizeof(duration) +
           sizeof(rate) +
           sizeof(volume) +
           sizeof(reserved16) +
           sizeof(reserved32) +
           sizeof(matrix) +
           sizeof(pre_defined);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 MovieHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(creation_time);
   mControl->Write(modification_time);
   mControl->Write(timescale);
   mControl->Write(duration);
   mControl->Write(rate);
   mControl->Write(volume);
   mControl->Write(reserved16);
   mControl->WriteArray(reserved32, 2);
   mControl->WriteArray(matrix, 9);
   mControl->WriteArray(pre_defined, 6);
   mControl->Write(next_track_ID);
   return NS_OK;
 }
 uint32_t
 MovieHeaderBox::GetTimeScale()
 {
   // Only audio track in container.
   if (mAudioMeta && !mVideoMeta) {
     return mAudioMeta->GetAudioSampleRate();
   }
   // return video rate
   return mVideoMeta->GetVideoClockRate();
 }
 MovieHeaderBox::~MovieHeaderBox()
 {
   MOZ_COUNT_DTOR(MovieHeaderBox);
 }
 MovieHeaderBox::MovieHeaderBox(ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("mvhd"), 0, 0, aControl)
   , creation_time(0)
   , modification_time(0)
   , timescale(90000)
   , duration(0)
   , rate(0x00010000)
   , volume(0x0100)
   , reserved16(0)
   , next_track_ID(1)
 {
   memcpy(matrix, iso_matrix, sizeof(matrix));
   memset(reserved32, 0, sizeof(reserved32));
   memset(pre_defined, 0, sizeof(pre_defined));
   MOZ_COUNT_CTOR(MovieHeaderBox);
 }
 TrackHeaderBox::TrackHeaderBox(uint32_t aType, ISOControl* aControl)
   : FullBox(NS_LITERAL_CSTRING("tkhd"), 0,
             flags_track_enabled | flags_track_in_movie | flags_track_in_preview,
             aControl)
   , creation_time(0)
   , modification_time(0)
   , track_ID(0)
   , reserved(0)
   , duration(0)
   , layer(0)
   , alternate_group(0)
   , volume(0)
   , reserved3(0)
   , width(0)
   , height(0)
 {
   mTrackType = aType;
   memcpy(matrix, iso_matrix, sizeof(matrix));
   memset(reserved2, 0, sizeof(reserved2));
   MOZ_COUNT_CTOR(TrackHeaderBox);
 }
 TrackHeaderBox::~TrackHeaderBox()
 {
   MOZ_COUNT_DTOR(TrackHeaderBox);
 }
 nsresult
 TrackHeaderBox::Generate(uint32_t* aBoxSize)
 {
   creation_time = mControl->GetTime();
   modification_time = mControl->GetTime();
   track_ID = (mTrackType == Audio_Track ?
                 mControl->GetTrackID(mAudioMeta->GetKind()) :
                 mControl->GetTrackID(mVideoMeta->GetKind()));
   // fragmented mp4
   duration = 0;
   // volume, audiotrack is always 0x0100 in 14496-12 8.3.2.2
   volume = (mTrackType == Audio_Track ? 0x0100 : 0);
   if (mTrackType == Video_Track) {
     width = mVideoMeta->GetVideoDisplayWidth() << 16;
     height = mVideoMeta->GetVideoDisplayHeight() << 16;
     // Check display size, using the pixel size if any of them is invalid.
     if (!width || !height) {
       width = mVideoMeta->GetVideoWidth() << 16;
       height = mVideoMeta->GetVideoHeight() << 16;
     }
   }
   size += sizeof(creation_time) +
           sizeof(modification_time) +
           sizeof(track_ID) +
           sizeof(reserved) +
           sizeof(duration) +
           sizeof(reserved2) +
           sizeof(layer) +
           sizeof(alternate_group) +
           sizeof(volume) +
           sizeof(reserved3) +
           sizeof(matrix) +
           sizeof(width) +
           sizeof(height);
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 TrackHeaderBox::Write()
 {
   WRITE_FULLBOX(mControl, size)
   mControl->Write(creation_time);
   mControl->Write(modification_time);
   mControl->Write(track_ID);
   mControl->Write(reserved);
   mControl->Write(duration);
   mControl->WriteArray(reserved2, 2);
   mControl->Write(layer);
   mControl->Write(alternate_group);
   mControl->Write(volume);
   mControl->Write(reserved3);
   mControl->WriteArray(matrix, 9);
   mControl->Write(width);
   mControl->Write(height);
   return NS_OK;
 }
 nsresult
 FileTypeBox::Generate(uint32_t* aBoxSize)
 {
   minor_version = 0;
   if (mControl->GetMuxingType() == ISOMediaWriter::TYPE_FRAG_MP4) {
     if (!mControl->HasVideoTrack() && mControl->HasAudioTrack()) {
       major_brand = "M4A ";
     } else {
       major_brand = "MP42";
     }
     compatible_brands.AppendElement("mp42");
     compatible_brands.AppendElement("isom");
   } else if (mControl->GetMuxingType() == ISOMediaWriter::TYPE_FRAG_3GP) {
     major_brand = "3gp9";
     // According to 3GPP TS 26.244 V12.2.0, section 5.3.4, it's recommended to
     // list all compatible brands here. 3GP spec supports fragment from '3gp6'.
     compatible_brands.AppendElement("3gp9");
     compatible_brands.AppendElement("3gp8");
     compatible_brands.AppendElement("3gp7");
     compatible_brands.AppendElement("3gp6");
     compatible_brands.AppendElement("isom");
   } else {
     MOZ_ASSERT(0);
   }
   size += major_brand.Length() +
           sizeof(minor_version) +
           compatible_brands.Length() * 4;
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 FileTypeBox::Write()
 {
   BoxSizeChecker checker(mControl, size);
   Box::Write();
   mControl->WriteFourCC(major_brand.get());
   mControl->Write(minor_version);
   uint32_t len = compatible_brands.Length();
   for (uint32_t i = 0; i < len; i++) {
     mControl->WriteFourCC(compatible_brands[i].get());
   }
   return NS_OK;
 }
 FileTypeBox::FileTypeBox(ISOControl* aControl)
   : Box(NS_LITERAL_CSTRING("ftyp"), aControl)
   , minor_version(0)
 {
   MOZ_COUNT_CTOR(FileTypeBox);
 }
 FileTypeBox::~FileTypeBox()
 {
   MOZ_COUNT_DTOR(FileTypeBox);
 }
 MediaBox::MediaBox(uint32_t aType, ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("mdia"), aControl)
 {
   mTrackType = aType;
   boxes.AppendElement(new MediaHeaderBox(aType, aControl));
   boxes.AppendElement(new HandlerBox(aType, aControl));
   boxes.AppendElement(new MediaInformationBox(aType, aControl));
   MOZ_COUNT_CTOR(MediaBox);
 }
 MediaBox::~MediaBox()
 {
   MOZ_COUNT_DTOR(MediaBox);
 }
 nsresult
 DefaultContainerImpl::Generate(uint32_t* aBoxSize)
 {
   nsresult rv;
   uint32_t box_size;
   uint32_t len = boxes.Length();
   for (uint32_t i = 0; i < len; i++) {
     rv = boxes.ElementAt(i)->Generate(&box_size);
     NS_ENSURE_SUCCESS(rv, rv);
     size += box_size;
   }
   *aBoxSize = size;
   return NS_OK;
 }
 nsresult
 DefaultContainerImpl::Find(const nsACString& aType,
                            nsTArray<nsRefPtr<MuxerOperation>>& aOperations)
 {
   nsresult rv = Box::Find(aType, aOperations);
   NS_ENSURE_SUCCESS(rv, rv);
   uint32_t len = boxes.Length();
   for (uint32_t i = 0; i < len; i++) {
     rv = boxes.ElementAt(i)->Find(aType, aOperations);
     NS_ENSURE_SUCCESS(rv, rv);
   }
   return NS_OK;
 }
 nsresult
 DefaultContainerImpl::Write()
 {
   BoxSizeChecker checker(mControl, size);
   Box::Write();
   nsresult rv;
   uint32_t len = boxes.Length();
   for (uint32_t i = 0; i < len; i++) {
     rv = boxes.ElementAt(i)->Write();
     NS_ENSURE_SUCCESS(rv, rv);
   }
   return NS_OK;
 }
 DefaultContainerImpl::DefaultContainerImpl(const nsACString& aType,
                                            ISOControl* aControl)
   : Box(aType, aControl)
 {
 }
 nsresult
 Box::Write()
 {
   mControl->Write(size);
   mControl->WriteFourCC(boxType.get());
   return NS_OK;
 }
 nsresult
 Box::Find(const nsACString& aType, nsTArray<nsRefPtr<MuxerOperation>>& aOperations)
 {
   if (boxType == aType) {
     aOperations.AppendElement(this);
   }
   return NS_OK;
 }
 Box::Box(const nsACString& aType, ISOControl* aControl)
   : size(8), mControl(aControl)
 {
   MOZ_ASSERT(aType.Length() == 4);
   boxType = aType;
   aControl->GetAudioMetadata(mAudioMeta);
   aControl->GetVideoMetadata(mVideoMeta);
 }
 FullBox::FullBox(const nsACString& aType, uint8_t aVersion, uint32_t aFlags,
                  ISOControl* aControl)
   : Box(aType, aControl)
 {
   // Cast to uint64_t due to VC2010  bug.
   std::bitset<24> tmp_flags((uint64_t)aFlags);
   version = aVersion;
   flags = tmp_flags;
   size += sizeof(version) + flags.size() / CHAR_BIT;
 }
 nsresult
 FullBox::Write()
 {
   Box::Write();
   mControl->Write(version);
   mControl->WriteBits(flags.to_ulong(), flags.size());
   return NS_OK;
 }
 TrackBox::TrackBox(uint32_t aTrackType, ISOControl* aControl)
   : DefaultContainerImpl(NS_LITERAL_CSTRING("trak"), aControl)
 {
   boxes.AppendElement(new TrackHeaderBox(aTrackType, aControl));
   boxes.AppendElement(new MediaBox(aTrackType, aControl));
   MOZ_COUNT_CTOR(TrackBox);
 }
 TrackBox::~TrackBox()
 {
   MOZ_COUNT_DTOR(TrackBox);
 }
 SampleEntryBox::SampleEntryBox(const nsACString& aFormat, ISOControl* aControl)
   : Box(aFormat, aControl)
   , data_reference_index(0)
 {
   data_reference_index = 1; // There is only one data reference in each track.
   size += sizeof(reserved) +
           sizeof(data_reference_index);
   memset(reserved, 0, sizeof(reserved));
 }
 nsresult
 SampleEntryBox::Write()
 {
   Box::Write();
   mControl->Write(reserved, sizeof(reserved));
   mControl->Write(data_reference_index);
   return NS_OK;
 }
 nsresult
 AudioSampleEntry::Write()
 {
   SampleEntryBox::Write();
   mControl->Write(sound_version);
   mControl->Write(reserved2, sizeof(reserved2));
   mControl->Write(channels);
   mControl->Write(sample_size);
   mControl->Write(compressionId);
   mControl->Write(packet_size);
   mControl->Write(timeScale);
   return NS_OK;
 }
 AudioSampleEntry::AudioSampleEntry(const nsACString& aFormat, ISOControl* aControl)
   : SampleEntryBox(aFormat, aControl)
   , sound_version(0)
   , channels(2)
   , sample_size(16)
   , compressionId(0)
   , packet_size(0)
   , timeScale(0)
 {
   memset(reserved2, 0 , sizeof(reserved2));
   channels = mAudioMeta->GetAudioChannels();
   timeScale = mAudioMeta->GetAudioSampleRate() << 16;
   size += sizeof(sound_version) +
           sizeof(reserved2) +
           sizeof(sample_size) +
           sizeof(channels) +
           sizeof(packet_size) +
           sizeof(compressionId) +
           sizeof(timeScale);
   MOZ_COUNT_CTOR(AudioSampleEntry);
 }
 AudioSampleEntry::~AudioSampleEntry()
 {
   MOZ_COUNT_DTOR(AudioSampleEntry);
 }
 nsresult
 VisualSampleEntry::Write()
 {
   SampleEntryBox::Write();
   mControl->Write(reserved, sizeof(reserved));
   mControl->Write(width);
   mControl->Write(height);
   mControl->Write(horizresolution);
   mControl->Write(vertresolution);
   mControl->Write(reserved2);
   mControl->Write(frame_count);
   mControl->Write(compressorName, sizeof(compressorName));
   mControl->Write(depth);
   mControl->Write(pre_defined);
   return NS_OK;
 }
 VisualSampleEntry::VisualSampleEntry(const nsACString& aFormat, ISOControl* aControl)
   : SampleEntryBox(aFormat, aControl)
   , width(0)
   , height(0)
   , horizresolution(resolution_72_dpi)
   , vertresolution(resolution_72_dpi)
   , reserved2(0)
   , frame_count(1)
   , depth(video_depth)
   , pre_defined(-1)
 {
   memset(reserved, 0 , sizeof(reserved));
   memset(compressorName, 0 , sizeof(compressorName));
   // both fields occupy 16 bits defined in 14496-2 6.2.3.
   width = mVideoMeta->GetVideoWidth();
   height = mVideoMeta->GetVideoHeight();
   size += sizeof(reserved) +
           sizeof(width) +
           sizeof(height) +
           sizeof(horizresolution) +
           sizeof(vertresolution) +
           sizeof(reserved2) +
           sizeof(frame_count) +
           sizeof(compressorName) +
           sizeof(depth) +
           sizeof(pre_defined);
   MOZ_COUNT_CTOR(VisualSampleEntry);
 }
 VisualSampleEntry::~VisualSampleEntry()
 {
   MOZ_COUNT_DTOR(VisualSampleEntry);
 }
 }

The Tor Browser / annotate

content/media/encoder/fmp4_muxer/ISOMediaBoxes.cpp@6474c204b198 (annotated)

content/media/encoder/fmp4_muxer/ISOMediaBoxes.cpp