MP4 Muxer implementation.

Change-Id: I2aeb506e5bf7e2301e855456688273fe5f3988a2

media/base/muxer.cc

@@ -10,8 +10,8 @@
 
 namespace media {
 
-Muxer::Muxer(const Options& options, EncryptorSource* encrytor_source) :
+Muxer::Muxer(const MuxerOptions& options, EncryptorSource* encrytor_source)
-  encryptor_source_(encrytor_source), encryptor_(NULL) {}
+    : options_(options), encryptor_source_(encrytor_source) {}
 
 Muxer::~Muxer() {}
 
@@ -25,7 +25,6 @@ Status Muxer::Run() {
   DCHECK(!streams_.empty());
 
   Status status;
-
   // Start the streams.
   for (std::vector<MediaStream*>::iterator it = streams_.begin();
        it != streams_.end();
@@ -35,15 +34,21 @@ Status Muxer::Run() {
       return status;
   }
 
+  uint32 current_stream_id = 0;
   while (status.ok()) {
-    // TODO(kqyang): Need to do some proper synchronization between streams.
     scoped_refptr<MediaSample> sample;
-    status = streams_[0]->PullSample(&sample);
+    status = streams_[current_stream_id]->PullSample(&sample);
     if (!status.ok())
       break;
-    status = AddSample(streams_[0], sample);
+    status = AddSample(streams_[current_stream_id], sample);
+
+    // Switch to next stream if the current stream is ready for fragmentation.
+    if (status.Matches(Status(error::FRAGMENT_FINALIZED, ""))) {
+      current_stream_id = (current_stream_id + 1) % streams_.size();
+      status.Clear();
     }
-  return status.Matches(Status(error::EOF, "")) ? Status::OK : status;
+  }
+  return status.Matches(Status(error::END_OF_STREAM, "")) ? Status::OK : status;
 }
 
 }  // namespace media

media/base/muxer.h

@@ -1,6 +1,8 @@
 // Copyright (c) 2013 Google Inc. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+//
+// Defines the muxer interface.
 
 #ifndef MEDIA_BASE_MUXER_H_
 #define MEDIA_BASE_MUXER_H_
@@ -9,92 +11,46 @@
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "media/base/muxer_options.h"
 #include "media/base/status.h"
 
 namespace media {
 
-class Encryptor;
 class EncryptorSource;
 class MediaSample;
 class MediaStream;
 
 class Muxer {
  public:
-  struct Options {
+  Muxer(const MuxerOptions& options, EncryptorSource* encryptor_source);
-    // Generate a single segment for each media presentation. This option
-    // should be set for on demand profile.
-    bool single_segment;
-
-    // Segment duration. If single_segment is specified, this parameter sets
-    // the duration of a subsegment. A subsegment can contain one to several
-    // fragments.
-    int segment_duration;
-
-    // Fragment duration. Should not be larger than the segment duration.
-    int fragment_duration;
-
-    // Force segments to begin with stream access points. Segment duration may
-    // not be exactly what asked by segment_duration.
-    bool segment_sap_aligned;
-
-    // Force fragments to begin with stream access points. Fragment duration
-    // may not be exactly what asked by segment_duration. Imply
-    // segment_sap_aligned.
-    bool fragment_sap_aligned;
-
-    // Set the number of subsegments in each SIDX box. If 0, a single SIDX box
-    // is used per segment. If -1, no SIDX box is used. Otherwise, the Muxer
-    // will pack N subsegments in the root SIDX of the segment, with
-    // segment_duration/N/fragment_duration fragments per subsegment.
-    int num_subsegments_per_sidx;
-
-    // Output file name. If segment_template is not specified, the Muxer
-    // generates this single output file with all segments concatenated;
-    // Otherwise, it specifies the init segment name.
-    std::string output_file_name;
-
-    // Specify output segment name pattern for generated segments. It can
-    // furthermore be configured by using a subset of the SegmentTemplate
-    // identifiers: $RepresentationID$, $Number$, $Bandwidth$ and $Time.
-    // Optional.
-    std::string segment_template;
-
-    // Specify a directory for temporary file creation.
-    std::string temp_directory_name;
-  };
-
-  // Muxer does not take over the ownership of encryptor_source.
-  Muxer(const Options& options, EncryptorSource* encryptor_source);
   virtual ~Muxer();
 
+  // Initialize the muxer. Must be called after connecting all the streams.
+  virtual Status Initialize() = 0;
+
+  // Final clean up.
+  virtual Status Finalize() = 0;
+
   // Adds video/audio stream.
-  // Returns OK on success.
   virtual Status AddStream(MediaStream* stream);
 
   // Adds new media sample.
   virtual Status AddSample(const MediaStream* stream,
                            scoped_refptr<MediaSample> sample) = 0;
 
-  // Final clean up.
-  virtual Status Finalize() = 0;
-
   // Drives the remuxing from muxer side (pull).
   virtual Status Run();
 
-  uint32 num_streams() const {
+  const std::vector<MediaStream*>& streams() const { return streams_; }
-    return streams_.size();
-  }
 
-  MediaStream* streams(uint32 index) const {
+ protected:
-    if (index >= streams_.size())
+  const MuxerOptions& options() const { return options_; }
-      return NULL;
+  EncryptorSource* encryptor_source() { return encryptor_source_; }
-    return streams_[index];
-  }
 
  private:
-  EncryptorSource* encryptor_source_;
+  MuxerOptions options_;
-  Encryptor* encryptor_;
   std::vector<MediaStream*> streams_;
+  EncryptorSource* const encryptor_source_;
 
   DISALLOW_COPY_AND_ASSIGN(Muxer);
 };

media/base/muxer_options.h

@@ -0,0 +1,59 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_BASE_MUXER_OPTIONS_H_
+#define MEDIA_BASE_MUXER_OPTIONS_H_
+
+#include <string>
+
+namespace media {
+
+struct MuxerOptions {
+  // Generate a single segment for each media presentation. This option
+  // should be set for on demand profile.
+  bool single_segment;
+
+  // Segment duration in seconds. If single_segment is specified, this parameter
+  // sets the duration of a subsegment; otherwise, this parameter sets the
+  // duration of a segment. A segment can contain one to many fragments.
+  double segment_duration;
+
+  // Fragment duration in seconds. Should not be larger than the segment
+  // duration.
+  double fragment_duration;
+
+  // Force segments to begin with stream access points. Segment duration may
+  // not be exactly what asked by segment_duration.
+  bool segment_sap_aligned;
+
+  // Force fragments to begin with stream access points. Fragment duration
+  // may not be exactly what asked by segment_duration. Setting to true implies
+  // that segment_sap_aligned is true as well.
+  bool fragment_sap_aligned;
+
+  // For ISO BMFF only.
+  // Set the number of subsegments in each SIDX box. If 0, a single SIDX box
+  // is used per segment. If -1, no SIDX box is used. Otherwise, the Muxer
+  // will pack N subsegments in the root SIDX of the segment, with
+  // segment_duration/N/fragment_duration fragments per subsegment.
+  int num_subsegments_per_sidx;
+
+  // Output file name. If segment_template is not specified, the Muxer
+  // generates this single output file with all segments concatenated;
+  // Otherwise, it specifies the init segment name.
+  std::string output_file_name;
+
+  // Specify output segment name pattern for generated segments. It can
+  // furthermore be configured by using a subset of the SegmentTemplate
+  // identifiers: $RepresentationID$, $Number$, $Bandwidth$ and $Time.
+  // Optional.
+  std::string segment_template;
+
+  // Specify the temporary file for on demand media file creation.
+  std::string temp_file_name;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_MUXER_OPTIONS_H_

media/file/file.h

@@ -7,6 +7,8 @@
 #ifndef PACKAGER_FILE_FILE_H_
 #define PACKAGER_FILE_FILE_H_
 
+#include <string>
+
 #include "base/basictypes.h"
 
 namespace media {
@@ -55,6 +57,9 @@ class File {
   // Return whether we're currently at eof.
   virtual bool Eof() = 0;
 
+  // Return the file name.
+  const std::string& file_name() const { return file_name_; }
+
   // ************************************************************
   // * Static Methods: File-on-the-filesystem status
   // ************************************************************
@@ -64,7 +69,7 @@ class File {
   static int64 GetFileSize(const char* fname);
 
  protected:
-  File() {}
+  explicit File(const std::string& file_name) : file_name_(file_name) {}
   // Do *not* call the destructor directly (with the "delete" keyword)
   // nor use scoped_ptr; instead use Close().
   virtual ~File() {}
@@ -77,6 +82,7 @@ class File {
   // LocalFile, MemFile based on prefix.
   static File* Create(const char* fname, const char* mode);
 
+  std::string file_name_;
   DISALLOW_COPY_AND_ASSIGN(File);
 };
 

media/file/file_closer.h

@@ -0,0 +1,25 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license tha can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_FILE_FILE_CLOSER_H_
+#define MEDIA_FILE_FILE_CLOSER_H_
+
+#include "base/logging.h"
+#include "media/file/file.h"
+
+namespace media {
+
+// Use by scoped_ptr to automatically close the file when it goes out of scope.
+struct FileCloser {
+  inline void operator()(File* file) const {
+    if (file != NULL && !file->Close()) {
+      LOG(WARNING) << "Failed to close the file properly: "
+                   << file->file_name();
+    }
+  }
+};
+
+}  // namespace media
+
+#endif  // MEDIA_FILE_FILE_CLOSER_H_

media/file/local_file.cc

@@ -10,11 +10,11 @@
 namespace media {
 
 LocalFile::LocalFile(const char* name, const char* mode)
-    : File(), file_name_(name), file_mode_(mode), internal_file_(NULL) {}
+    : File(name), file_mode_(mode), internal_file_(NULL) {}
 
 bool LocalFile::Open() {
   internal_file_ =
-      file_util::OpenFile(base::FilePath(file_name_), file_mode_.c_str());
+      file_util::OpenFile(base::FilePath(file_name()), file_mode_.c_str());
   return (internal_file_ != NULL);
 }
 
@@ -50,7 +50,7 @@ int64 LocalFile::Size() {
   }
 
   int64 file_size;
-  if (!file_util::GetFileSize(base::FilePath(file_name_), &file_size)) {
+  if (!file_util::GetFileSize(base::FilePath(file_name()), &file_size)) {
     LOG(ERROR) << "Cannot get file size.";
     return -1;
   }

media/file/local_file.h

@@ -31,7 +31,6 @@ class LocalFile : public File {
   virtual bool Open() OVERRIDE;
 
  private:
-  std::string file_name_;
   std::string file_mode_;
   FILE* internal_file_;
 

media/mp4/mp4_fragmenter.cc

@@ -0,0 +1,239 @@
+// Copyright (c) 2013 Google Inc. 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/mp4_fragmenter.h"
+
+#include "media/base/aes_encryptor.h"
+#include "media/base/buffer_reader.h"
+#include "media/base/buffer_writer.h"
+#include "media/base/encryptor_source.h"
+#include "media/base/media_sample.h"
+#include "media/mp4/box_definitions.h"
+#include "media/mp4/cenc.h"
+
+namespace {
+const uint64 kInvalidTime = kuint64max;
+
+// Optimize sample entries table. If all values in |entries| are identical,
+// then |entries| is cleared and the value is assigned to |default_value|;
+// otherwise it is a NOP. Return true if the table is optimized.
+template <typename T>
+bool OptimizeSampleEntries(std::vector<T>* entries, T* default_value) {
+  DCHECK(entries != NULL && default_value != NULL);
+  DCHECK(!entries->empty());
+
+  typename std::vector<T>::const_iterator it = entries->begin();
+  T value = *it;
+  for (; it < entries->end(); ++it)
+    if (value != *it)
+      return false;
+
+  // Clear |entries| if it contains only one value.
+  entries->clear();
+  *default_value = value;
+  return true;
+}
+}  // namespace
+
+namespace media {
+namespace mp4 {
+
+MP4Fragmenter::MP4Fragmenter(TrackFragment* traf,
+                             EncryptorSource* encryptor_source,
+                             int64 clear_time,
+                             uint8 nalu_length_size)
+    : encryptor_source_(encryptor_source),
+      nalu_length_size_(nalu_length_size),
+      traf_(traf),
+      fragment_finalized_(false),
+      fragment_duration_(0),
+      earliest_presentation_time_(0),
+      first_sap_time_(0),
+      clear_time_(clear_time) {}
+
+MP4Fragmenter::~MP4Fragmenter() {}
+
+Status MP4Fragmenter::AddSample(scoped_refptr<MediaSample> sample) {
+  CHECK(sample->pts() >= sample->dts());
+  CHECK(sample->duration() > 0);
+
+  if (ShouldEncryptFragment()) {
+    Status status = EncryptSample(sample);
+    if (!status.ok())
+      return status;
+  }
+
+  // Fill in sample parameters. It will be optimized later.
+  traf_->runs[0].sample_sizes.push_back(sample->data_size());
+  traf_->runs[0].sample_durations.push_back(sample->duration());
+  traf_->runs[0].sample_flags.push_back(
+      sample->is_key_frame() ? 0 : TrackFragmentHeader::kNonKeySampleMask);
+  traf_->runs[0]
+      .sample_composition_time_offsets.push_back(sample->pts() - sample->dts());
+  if (sample->pts() != sample->dts()) {
+    traf_->runs[0].flags |=
+        TrackFragmentRun::kSampleCompTimeOffsetsPresentMask;
+  }
+
+  data_->AppendArray(sample->data(), sample->data_size());
+  fragment_duration_ += sample->duration();
+
+  if (earliest_presentation_time_ > sample->pts())
+    earliest_presentation_time_ = sample->pts();
+
+  if (sample->is_key_frame()) {
+    if (kInvalidTime == first_sap_time_)
+      first_sap_time_ = sample->pts();
+  }
+  return Status::OK;
+}
+
+void MP4Fragmenter::InitializeFragment() {
+  fragment_finalized_ = false;
+  traf_->decode_time.decode_time += fragment_duration_;
+  traf_->auxiliary_size.sample_info_sizes.clear();
+  traf_->auxiliary_offset.offsets.clear();
+  traf_->runs.clear();
+  traf_->runs.resize(1);
+  traf_->runs[0].flags = TrackFragmentRun::kDataOffsetPresentMask;
+  traf_->header.flags = TrackFragmentHeader::kDefaultBaseIsMoofMask;
+  fragment_duration_ = 0;
+  earliest_presentation_time_ = kInvalidTime;
+  first_sap_time_ = kInvalidTime;
+  data_.reset(new BufferWriter());
+  aux_data_.reset(new BufferWriter());
+
+  if (ShouldEncryptFragment()) {
+    if (!IsSubsampleEncryptionRequired()) {
+      DCHECK(encryptor_source_ != NULL);
+      traf_->auxiliary_size.default_sample_info_size =
+          encryptor_source_->encryptor()->iv().size();
+    }
+  }
+}
+
+void MP4Fragmenter::FinalizeFragment() {
+  if (ShouldEncryptFragment()) {
+    DCHECK(encryptor_source_ != NULL);
+
+    // The offset will be adjusted in Segmenter when we know moof size.
+    traf_->auxiliary_offset.offsets.push_back(0);
+
+    // Optimize saiz box.
+    SampleAuxiliaryInformationSize& saiz = traf_->auxiliary_size;
+    saiz.sample_count = traf_->runs[0].sample_sizes.size();
+    if (!saiz.sample_info_sizes.empty()) {
+      if (!OptimizeSampleEntries(&saiz.sample_info_sizes,
+                                 &saiz.default_sample_info_size)) {
+        saiz.default_sample_info_size = 0;
+      }
+    }
+  } else if (encryptor_source_ && clear_time_ > 0) {
+    // This fragment should be in clear.
+    // We generate at most two sample description entries, encrypted entry and
+    // clear entry. The 1-based clear entry index is always 2.
+    const uint32 kClearSampleDescriptionIndex = 2;
+
+    traf_->header.flags |=
+        TrackFragmentHeader::kSampleDescriptionIndexPresentMask;
+    traf_->header.sample_description_index = kClearSampleDescriptionIndex;
+    clear_time_ -= fragment_duration_;
+  }
+
+  // Optimize trun box.
+  traf_->runs[0].sample_count = traf_->runs[0].sample_sizes.size();
+  if (OptimizeSampleEntries(&traf_->runs[0].sample_durations,
+                            &traf_->header.default_sample_duration)) {
+    traf_->header.flags |=
+        TrackFragmentHeader::kDefaultSampleDurationPresentMask;
+  } else {
+    traf_->runs[0].flags |= TrackFragmentRun::kSampleDurationPresentMask;
+  }
+  if (OptimizeSampleEntries(&traf_->runs[0].sample_sizes,
+                            &traf_->header.default_sample_size)) {
+    traf_->header.flags |= TrackFragmentHeader::kDefaultSampleSizePresentMask;
+  } else {
+    traf_->runs[0].flags |= TrackFragmentRun::kSampleSizePresentMask;
+  }
+  if (OptimizeSampleEntries(&traf_->runs[0].sample_flags,
+                            &traf_->header.default_sample_flags)) {
+    traf_->header.flags |= TrackFragmentHeader::kDefaultSampleFlagsPresentMask;
+  } else {
+    traf_->runs[0].flags |= TrackFragmentRun::kSampleFlagsPresentMask;
+  }
+
+  fragment_finalized_ = true;
+}
+
+void MP4Fragmenter::GenerateSegmentReference(SegmentReference* reference) {
+  // TODO(kqyang): support daisy chain??
+  reference->reference_type = false;
+  reference->subsegment_duration = fragment_duration_;
+  reference->starts_with_sap = StartsWithSAP();
+  if (kInvalidTime == first_sap_time_) {
+    reference->sap_type = SegmentReference::TypeUnknown;
+    reference->sap_delta_time = 0;
+  } else {
+    reference->sap_type = SegmentReference::Type1;
+    reference->sap_delta_time = first_sap_time_ - earliest_presentation_time_;
+  }
+  reference->earliest_presentation_time = earliest_presentation_time_;
+}
+
+void MP4Fragmenter::EncryptBytes(uint8* data, uint32 size) {
+  CHECK(encryptor_source_->encryptor()->Encrypt(data, size, data));
+}
+
+Status MP4Fragmenter::EncryptSample(scoped_refptr<MediaSample> sample) {
+  DCHECK(encryptor_source_ != NULL && encryptor_source_->encryptor() != NULL);
+
+  FrameCENCInfo cenc_info(encryptor_source_->encryptor()->iv());
+  uint8* data = sample->writable_data();
+  if (!IsSubsampleEncryptionRequired()) {
+    EncryptBytes(data, sample->data_size());
+  } else {
+    BufferReader reader(data, sample->data_size());
+    while (reader.HasBytes(1)) {
+      uint64 nalu_length;
+      if (!reader.ReadNBytesInto8(&nalu_length, nalu_length_size_))
+        return Status(error::MUXER_FAILURE, "Fail to read nalu_length.");
+
+      SubsampleEntry subsample;
+      subsample.clear_bytes = nalu_length_size_ + 1;
+      subsample.cypher_bytes = nalu_length - 1;
+      if (!reader.SkipBytes(nalu_length)) {
+        return Status(error::MUXER_FAILURE,
+                      "Sample size does not match nalu_length.");
+      }
+
+      EncryptBytes(data + subsample.clear_bytes, subsample.cypher_bytes);
+      cenc_info.AddSubsample(subsample);
+      data += nalu_length_size_ + nalu_length;
+    }
+
+    // The length of per-sample auxiliary datum, defined in CENC ch. 7.
+    traf_->auxiliary_size.sample_info_sizes.push_back(cenc_info.ComputeSize());
+  }
+
+  cenc_info.Write(aux_data_.get());
+  encryptor_source_->encryptor()->UpdateIv();
+  return Status::OK;
+}
+
+bool MP4Fragmenter::StartsWithSAP() {
+  DCHECK(!traf_->runs.empty());
+  uint32 start_sample_flag;
+  if (traf_->runs[0].flags & TrackFragmentRun::kSampleFlagsPresentMask) {
+    DCHECK(!traf_->runs[0].sample_flags.empty());
+    start_sample_flag = traf_->runs[0].sample_flags[0];
+  } else {
+    DCHECK(traf_->header.flags &
+           TrackFragmentHeader::kDefaultSampleFlagsPresentMask);
+    start_sample_flag = traf_->header.default_sample_flags;
+  }
+  return (start_sample_flag & TrackFragmentHeader::kNonKeySampleMask) == 0;
+}
+
+}  // namespace mp4
+}  // namespace media

media/mp4/mp4_fragmenter.h

@@ -0,0 +1,96 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// MP4Fragmenter is responsible for the generation of MP4 fragments, i.e. traf
+// and the corresponding mdat. The samples are also encrypted if encryption is
+// requested.
+
+#ifndef MEDIA_MP4_MP4_FRAGMENTER_H_
+#define MEDIA_MP4_MP4_FRAGMENTER_H_
+
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "media/base/status.h"
+
+namespace media {
+
+class BufferWriter;
+class EncryptorSource;
+class MediaSample;
+
+namespace mp4 {
+
+class SegmentReference;
+class TrackFragment;
+
+class MP4Fragmenter {
+ public:
+  // Caller retains the ownership of |traf| and |encryptor_source|.
+  // |clear_time| specifies clear time in the current track timescale.
+  // |nalu_length_size| specifies NAL unit length size, for subsample
+  // encryption.
+  MP4Fragmenter(TrackFragment* traf,
+                EncryptorSource* encryptor_source,
+                int64 clear_time,
+                uint8 nalu_length_size);
+  ~MP4Fragmenter();
+
+  virtual Status AddSample(scoped_refptr<MediaSample> sample);
+
+  // Initialize the fragment with default data.
+  void InitializeFragment();
+
+  // Finalize and optimize the fragment.
+  void FinalizeFragment();
+
+  // Fill in |reference| with current fragment information.
+  void GenerateSegmentReference(SegmentReference* reference);
+
+  uint64 fragment_duration() const { return fragment_duration_; }
+  uint64 first_sap_time() const { return first_sap_time_; }
+  uint64 earliest_presentation_time() const {
+    return earliest_presentation_time_;
+  }
+  bool fragment_finalized() const { return fragment_finalized_; }
+  BufferWriter* data() { return data_.get(); }
+  BufferWriter* aux_data() { return aux_data_.get(); }
+
+ private:
+  void EncryptBytes(uint8* data, uint32 size);
+  Status EncryptSample(scoped_refptr<MediaSample> sample);
+
+  // Should we enable encrytion for the current fragment?
+  bool ShouldEncryptFragment() {
+    return (encryptor_source_ != NULL && clear_time_ <= 0);
+  }
+
+  // Should we enable subsample encryption?
+  bool IsSubsampleEncryptionRequired() { return nalu_length_size_ != 0; }
+
+  // Check if the current fragment starts with SAP.
+  bool StartsWithSAP();
+
+  EncryptorSource* encryptor_source_;
+  // If this stream contains AVC, subsample encryption specifies that the size
+  // and type of NAL units remain unencrypted. This field specifies the size of
+  // the size field. Can be 1, 2 or 4 bytes.
+  uint8 nalu_length_size_;
+  TrackFragment* traf_;
+  bool fragment_finalized_;
+  uint64 fragment_duration_;
+  uint64 earliest_presentation_time_;
+  uint64 first_sap_time_;
+  int64 clear_time_;
+  scoped_ptr<BufferWriter> data_;
+  scoped_ptr<BufferWriter> aux_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(MP4Fragmenter);
+};
+
+}  // namespace mp4
+}  // namespace media
+
+#endif  // MEDIA_MP4_MP4_FRAGMENTER_H_

media/mp4/mp4_general_segmenter.cc

@@ -0,0 +1,163 @@
+// Copyright (c) 2013 Google Inc. 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/mp4_general_segmenter.h"
+
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "media/base/buffer_writer.h"
+#include "media/base/media_stream.h"
+#include "media/base/muxer_options.h"
+#include "media/file/file.h"
+#include "media/mp4/box_definitions.h"
+
+namespace media {
+namespace mp4 {
+
+MP4GeneralSegmenter::MP4GeneralSegmenter(const MuxerOptions& options,
+                                         FileType* ftyp,
+                                         Movie* moov)
+    : MP4Segmenter(options, ftyp, moov),
+      styp_(new SegmentType),
+      num_segments_(0) {
+  // Use the same brands for styp as ftyp.
+  styp_->major_brand = ftyp->major_brand;
+  styp_->compatible_brands = ftyp->compatible_brands;
+}
+
+MP4GeneralSegmenter::~MP4GeneralSegmenter() {}
+
+Status MP4GeneralSegmenter::Initialize(
+    EncryptorSource* encryptor_source,
+    const std::vector<MediaStream*>& streams) {
+  Status status = MP4Segmenter::Initialize(encryptor_source, streams);
+  if (!status.ok())
+    return status;
+
+  DCHECK(ftyp() != NULL && moov() != NULL);
+  // Generate the output file with init segment.
+  File* file = File::Open(options().output_file_name.c_str(), "w");
+  if (file == NULL) {
+    return Status(error::FILE_FAILURE,
+                  "Cannot open file for write " + options().output_file_name);
+  }
+  scoped_ptr<BufferWriter> buffer(new BufferWriter);
+  ftyp()->Write(buffer.get());
+  moov()->Write(buffer.get());
+  status = buffer->WriteToFile(file);
+  if (!file->Close()) {
+    LOG(WARNING) << "Failed to close the file properly: "
+                 << options().output_file_name;
+  }
+  return status;
+}
+
+Status MP4GeneralSegmenter::FinalizeSegment() {
+  Status status = MP4Segmenter::FinalizeSegment();
+  if (!status.ok())
+    return status;
+
+  DCHECK(sidx() != NULL);
+  // earliest_presentation_time is the earliest presentation time of any
+  // access unit in the reference stream in the first subsegment.
+  // It will be re-calculated later when subsegments are finalized.
+  sidx()->earliest_presentation_time =
+      sidx()->references[0].earliest_presentation_time;
+
+  if (options().num_subsegments_per_sidx <= 0)
+    return WriteSegment();
+
+  // sidx() contains pre-generated segment references with one reference per
+  // fragment. Calculate |num_fragments_per_subsegment| and combine
+  // pre-generated references into final subsegment references.
+  uint32 num_fragments = sidx()->references.size();
+  uint32 num_fragments_per_subsegment =
+      (num_fragments - 1) / options().num_subsegments_per_sidx + 1;
+  if (num_fragments_per_subsegment <= 1)
+    return WriteSegment();
+
+  uint32 frag_index = 0;
+  uint32 subseg_index = 0;
+  std::vector<SegmentReference>& refs = sidx()->references;
+  uint64 first_sap_time =
+      refs[0].sap_delta_time + refs[0].earliest_presentation_time;
+  for (uint32 i = 1; i < num_fragments; ++i) {
+    refs[subseg_index].referenced_size += refs[i].referenced_size;
+    refs[subseg_index].subsegment_duration += refs[i].subsegment_duration;
+    refs[subseg_index].earliest_presentation_time =
+        std::min(refs[subseg_index].earliest_presentation_time,
+                 refs[i].earliest_presentation_time);
+    if (refs[subseg_index].sap_type == SegmentReference::TypeUnknown &&
+        refs[i].sap_type != SegmentReference::TypeUnknown) {
+      refs[subseg_index].sap_type = refs[i].sap_type;
+      first_sap_time =
+          refs[i].sap_delta_time + refs[i].earliest_presentation_time;
+    }
+    if (++frag_index >= num_fragments_per_subsegment) {
+      // Calculate sap delta time w.r.t. sidx_->earliest_presentation_time.
+      if (refs[subseg_index].sap_type != SegmentReference::TypeUnknown) {
+        refs[subseg_index].sap_delta_time =
+            first_sap_time - refs[subseg_index].earliest_presentation_time;
+      }
+      if (++i >= num_fragments)
+        break;
+      refs[++subseg_index] = refs[i];
+      first_sap_time =
+          refs[i].sap_delta_time + refs[i].earliest_presentation_time;
+      frag_index = 1;
+    }
+  }
+
+  refs.resize(options().num_subsegments_per_sidx);
+
+  // earliest_presentation_time is the earliest presentation time of any
+  // access unit in the reference stream in the first subsegment.
+  sidx()->earliest_presentation_time = refs[0].earliest_presentation_time;
+
+  return WriteSegment();
+}
+
+Status MP4GeneralSegmenter::WriteSegment() {
+  DCHECK(sidx() != NULL && fragment_buffer() != NULL && styp_ != NULL);
+
+  scoped_ptr<BufferWriter> buffer(new BufferWriter());
+  File* file;
+  std::string file_name;
+  if (options().segment_template.empty()) {
+    // Append the segment to output file if segment template is not specified.
+    file_name = options().output_file_name.c_str();
+    file = File::Open(file_name.c_str(), "a+");
+    if (file == NULL) {
+      return Status(
+          error::FILE_FAILURE,
+          "Cannot open file for append " + options().output_file_name);
+    }
+  } else {
+    // TODO(kqyang): generate the segment template name.
+    file_name = options().segment_template;
+    ReplaceSubstringsAfterOffset(
+        &file_name, 0, "$Number$", base::UintToString(++num_segments_));
+    file = File::Open(file_name.c_str(), "w");
+    if (file == NULL) {
+      return Status(error::FILE_FAILURE,
+                    "Cannot open file for write " + file_name);
+    }
+    styp_->Write(buffer.get());
+  }
+
+  // If num_subsegments_per_sidx is negative, no SIDX box is generated.
+  if (options().num_subsegments_per_sidx >= 0)
+    sidx()->Write(buffer.get());
+
+  Status status = buffer->WriteToFile(file);
+  if (status.ok())
+    status = fragment_buffer()->WriteToFile(file);
+
+  if (!file->Close())
+    LOG(WARNING) << "Failed to close the file properly: " << file_name;
+  return status;
+}
+
+}  // namespace mp4
+}  // namespace media

media/mp4/mp4_general_segmenter.h

@@ -0,0 +1,55 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Segmenter for MP4 live, main and simple profiles. The generated media file
+// could contain one to many segments with segment duration defined by
+// |MuxerOptions.segment_duration|. A segment could contain one to many
+// subsegments defined by |num_subsegments_per_sidx|. A subsegment could
+// contain one to many fragments with fragment duration defined by
+// |MuxerOptions.fragment_duration|. The actual segment or fragment duration
+// may not match the defined duration exactly but in a best effort basic, i.e.
+// the segmenter tries to end segment/fragment at the first sample with
+// overall segment/fragment duration not smaller than defined duration and
+// yet meet SAP requirements. The generated segments are written into files
+// defined by |MuxerOptions.segment_template| if it is defined; otherwise,
+// the segments are appended to the main output file defined by
+// |MuxerOptions.output_file_name|.
+
+#ifndef MEDIA_MP4_MP4_GENERAL_SEGMENTER_H_
+#define MEDIA_MP4_MP4_GENERAL_SEGMENTER_H_
+
+#include "media/mp4/mp4_segmenter.h"
+
+namespace media {
+namespace mp4 {
+
+struct SegmentType;
+
+class MP4GeneralSegmenter : public MP4Segmenter {
+ public:
+  // Caller transfers the ownership of |ftyp| and |moov| to this class.
+  MP4GeneralSegmenter(const MuxerOptions& options, FileType* ftyp, Movie* moov);
+  ~MP4GeneralSegmenter();
+
+  // MP4Segmenter implementations.
+  virtual Status Initialize(EncryptorSource* encryptor_source,
+                            const std::vector<MediaStream*>& streams) OVERRIDE;
+
+ protected:
+  virtual Status FinalizeSegment() OVERRIDE;
+
+ private:
+  // Write segment to file.
+  Status WriteSegment();
+
+  scoped_ptr<SegmentType> styp_;
+  uint32 num_segments_;
+
+  DISALLOW_COPY_AND_ASSIGN(MP4GeneralSegmenter);
+};
+
+}  // namespace mp4
+}  // namespace media
+
+#endif  // MEDIA_MP4_MP4_GENERAL_SEGMENTER_H_

media/mp4/mp4_muxer.cc

@@ -0,0 +1,223 @@
+// Copyright (c) 2013 Google Inc. 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/mp4_muxer.h"
+
+#include "base/time/time.h"
+#include "media/base/aes_encryptor.h"
+#include "media/base/audio_stream_info.h"
+#include "media/base/encryptor_source.h"
+#include "media/base/media_sample.h"
+#include "media/base/media_stream.h"
+#include "media/base/video_stream_info.h"
+#include "media/file/file.h"
+#include "media/mp4/box_definitions.h"
+#include "media/mp4/es_descriptor.h"
+#include "media/mp4/fourccs.h"
+#include "media/mp4/mp4_general_segmenter.h"
+#include "media/mp4/mp4_vod_segmenter.h"
+
+namespace {
+// The version of cenc implemented here. CENC 4.
+const int kCencSchemeVersion = 0x00010000;
+
+// Get time in seconds since midnight, Jan. 1, 1904, in UTC Time.
+uint64 IsoTimeNow() {
+  // Time in seconds from Jan. 1, 1904 to epoch time, i.e. Jan. 1, 1970.
+  const uint64 kIsomTimeOffset = 2082844800l;
+  return kIsomTimeOffset + base::Time::Now().ToDoubleT();
+}
+}  // namespace
+
+namespace media {
+namespace mp4 {
+
+MP4Muxer::MP4Muxer(const MuxerOptions& options,
+                   EncryptorSource* encryptor_source)
+    : Muxer(options, encryptor_source) {}
+MP4Muxer::~MP4Muxer() {}
+
+Status MP4Muxer::Initialize() {
+  DCHECK(!streams().empty());
+
+  scoped_ptr<FileType> ftyp(new FileType);
+  scoped_ptr<Movie> moov(new Movie);
+
+  ftyp->major_brand = FOURCC_DASH;
+  ftyp->compatible_brands.push_back(FOURCC_ISO6);
+  ftyp->compatible_brands.push_back(FOURCC_MP41);
+  if (streams().size() == 1 &&
+      streams()[0]->info()->stream_type() == kStreamVideo)
+    ftyp->compatible_brands.push_back(FOURCC_AVC1);
+
+  moov->header.creation_time = IsoTimeNow();
+  moov->header.modification_time = IsoTimeNow();
+  moov->header.next_track_id = streams().size() + 1;
+
+  moov->tracks.resize(streams().size());
+  moov->extends.tracks.resize(streams().size());
+
+  // Initialize tracks.
+  for (uint32 i = 0; i < streams().size(); ++i) {
+    Track& trak = moov->tracks[i];
+    trak.header.track_id = i + 1;
+
+    TrackExtends& trex = moov->extends.tracks[i];
+    trex.track_id = trak.header.track_id;
+    trex.default_sample_description_index = 1;
+
+    switch (streams()[i]->info()->stream_type()) {
+      case kStreamVideo:
+        GenerateVideoTrak(
+            static_cast<VideoStreamInfo*>(streams()[i]->info().get()),
+            &trak,
+            i + 1);
+        break;
+      case kStreamAudio:
+        GenerateAudioTrak(
+            static_cast<AudioStreamInfo*>(streams()[i]->info().get()),
+            &trak,
+            i + 1);
+        break;
+      default:
+        NOTIMPLEMENTED() << "Not implemented for stream type: "
+                         << streams()[i]->info()->stream_type();
+    }
+  }
+
+  if (IsEncryptionRequired()) {
+    moov->pssh.resize(1);
+    GeneratePssh(&moov->pssh[0]);
+  }
+
+  if (options().single_segment) {
+    segmenter_.reset(
+        new MP4VODSegmenter(options(), ftyp.release(), moov.release()));
+  } else {
+    segmenter_.reset(
+        new MP4GeneralSegmenter(options(), ftyp.release(), moov.release()));
+  }
+  return segmenter_->Initialize(encryptor_source(), streams());
+}
+
+Status MP4Muxer::Finalize() {
+  DCHECK(segmenter_ != NULL);
+  return segmenter_->Finalize();
+}
+
+Status MP4Muxer::AddSample(const MediaStream* stream,
+                           scoped_refptr<MediaSample> sample) {
+  DCHECK(segmenter_ != NULL);
+  return segmenter_->AddSample(stream, sample);
+}
+
+void MP4Muxer::InitializeTrak(const StreamInfo* info, Track* trak) {
+  uint64 now = IsoTimeNow();
+  trak->header.creation_time = now;
+  trak->header.modification_time = now;
+  trak->header.duration = 0;
+  trak->media.header.creation_time = now;
+  trak->media.header.modification_time = now;
+  trak->media.header.timescale = info->time_scale();
+  trak->media.header.duration = 0;
+  if (!info->language().empty()) {
+    DCHECK_EQ(info->language().size(),
+              arraysize(trak->media.header.language) - 1);
+    strcpy(trak->media.header.language, info->language().c_str());
+    trak->media.header.language[info->language().size()] = '\0';
+  }
+}
+
+void MP4Muxer::GenerateVideoTrak(const VideoStreamInfo* video_info,
+                                 Track* trak,
+                                 uint32 track_id) {
+  InitializeTrak(video_info, trak);
+
+  trak->header.width = video_info->width();
+  trak->header.height = video_info->height();
+  trak->media.handler.type = kVideo;
+
+  VideoSampleEntry video;
+  video.format = FOURCC_AVC1;
+  video.width = video_info->width();
+  video.height = video_info->height();
+  video.avcc.data = video_info->extra_data();
+
+  SampleDescription& sample_description =
+      trak->media.information.sample_table.description;
+  sample_description.type = kVideo;
+  sample_description.video_entries.push_back(video);
+
+  if (IsEncryptionRequired()) {
+    DCHECK(encryptor_source() != NULL);
+    // Add a second entry for clear content if needed.
+    if (encryptor_source()->clear_milliseconds() > 0)
+      sample_description.video_entries.push_back(video);
+
+    VideoSampleEntry& encrypted_video = sample_description.video_entries[0];
+    GenerateSinf(&encrypted_video.sinf, encrypted_video.format);
+    encrypted_video.format = FOURCC_ENCV;
+  }
+}
+
+void MP4Muxer::GenerateAudioTrak(const AudioStreamInfo* audio_info,
+                                 Track* trak,
+                                 uint32 track_id) {
+  InitializeTrak(audio_info, trak);
+
+  trak->header.volume = 0x100;
+  trak->media.handler.type = kAudio;
+
+  AudioSampleEntry audio;
+  audio.format = FOURCC_MP4A;
+  audio.channelcount = audio_info->num_channels();
+  audio.samplesize = audio_info->sample_bits();
+  audio.samplerate = audio_info->sampling_frequency();
+
+  if (kCodecAAC) {
+    audio.esds.es_descriptor.set_object_type(kISO_14496_3);  // MPEG4 AAC.
+  } else {
+    // Do we need to support other types?
+    NOTIMPLEMENTED();
+  }
+  audio.esds.es_descriptor.set_esid(track_id);
+  audio.esds.es_descriptor.set_decoder_specific_info(audio_info->extra_data());
+
+  SampleDescription& sample_description =
+      trak->media.information.sample_table.description;
+  sample_description.type = kAudio;
+  sample_description.audio_entries.push_back(audio);
+
+  if (IsEncryptionRequired()) {
+    DCHECK(encryptor_source() != NULL);
+    // Add a second entry for clear content if needed.
+    if (encryptor_source()->clear_milliseconds() > 0)
+      sample_description.audio_entries.push_back(audio);
+
+    AudioSampleEntry& encrypted_audio = sample_description.audio_entries[0];
+    GenerateSinf(&encrypted_audio.sinf, encrypted_audio.format);
+    encrypted_audio.format = FOURCC_ENCA;
+  }
+}
+
+void MP4Muxer::GeneratePssh(ProtectionSystemSpecificHeader* pssh) {
+  DCHECK(encryptor_source() != NULL);
+  pssh->system_id = encryptor_source()->key_system_id();
+  pssh->data = encryptor_source()->pssh();
+}
+
+void MP4Muxer::GenerateSinf(ProtectionSchemeInfo* sinf, FourCC old_type) {
+  DCHECK(encryptor_source() != NULL);
+  DCHECK(encryptor_source()->encryptor() != NULL);
+  sinf->format.format = old_type;
+  sinf->type.type = FOURCC_CENC;
+  sinf->type.version = kCencSchemeVersion;
+  sinf->info.track_encryption.is_encrypted = true;
+  sinf->info.track_encryption.default_iv_size =
+      encryptor_source()->encryptor()->iv().size();
+  sinf->info.track_encryption.default_kid = encryptor_source()->key_id();
+}
+
+}  // namespace mp4
+}  // namespace media

media/mp4/mp4_muxer.h

@@ -0,0 +1,65 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Implements MP4 Muxer.
+
+#ifndef MEDIA_MP4_MP4_MUXER_H_
+#define MEDIA_MP4_MP4_MUXER_H_
+
+#include "media/base/muxer.h"
+#include "media/mp4/fourccs.h"
+
+namespace media {
+
+class AudioStreamInfo;
+class StreamInfo;
+class VideoStreamInfo;
+
+namespace mp4 {
+
+class MP4Segmenter;
+
+struct ProtectionSchemeInfo;
+struct ProtectionSystemSpecificHeader;
+struct Track;
+
+class MP4Muxer : public Muxer {
+ public:
+  MP4Muxer(const MuxerOptions& options, EncryptorSource* encryptor_source);
+  virtual ~MP4Muxer();
+
+  // Muxer implementations.
+  virtual Status Initialize() OVERRIDE;
+  virtual Status Finalize() OVERRIDE;
+  virtual Status AddSample(const MediaStream* stream,
+                           scoped_refptr<MediaSample> sample) OVERRIDE;
+
+ private:
+  // Generate Audio/Video Track atom.
+  void InitializeTrak(const StreamInfo* info, Track* trak);
+  void GenerateAudioTrak(const AudioStreamInfo* audio_info,
+                         Track* trak,
+                         uint32 track_id);
+  void GenerateVideoTrak(const VideoStreamInfo* video_info,
+                         Track* trak,
+                         uint32 track_id);
+
+  // Generate Pssh atom.
+  void GeneratePssh(ProtectionSystemSpecificHeader* pssh);
+
+  // Generates a sinf atom with CENC encryption parameters.
+  void GenerateSinf(ProtectionSchemeInfo* sinf, FourCC old_type);
+
+  // Should we enable encrytion?
+  bool IsEncryptionRequired() { return (encryptor_source() != NULL); }
+
+  scoped_ptr<MP4Segmenter> segmenter_;
+
+  DISALLOW_COPY_AND_ASSIGN(MP4Muxer);
+};
+
+}  // namespace mp4
+}  // namespace media
+
+#endif  // MEDIA_MP4_MP4_MUXER_H_

media/mp4/mp4_segmenter.cc

@@ -0,0 +1,244 @@
+// Copyright (c) 2013 Google Inc. 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/mp4_segmenter.h"
+
+#include <algorithm>
+
+#include "base/stl_util.h"
+#include "media/base/buffer_writer.h"
+#include "media/base/encryptor_source.h"
+#include "media/base/media_sample.h"
+#include "media/base/media_stream.h"
+#include "media/base/muxer_options.h"
+#include "media/base/video_stream_info.h"
+#include "media/mp4/box_definitions.h"
+#include "media/mp4/mp4_fragmenter.h"
+
+namespace {
+uint64 Rescale(uint64 time_in_old_scale, uint32 old_scale, uint32 new_scale) {
+  return static_cast<double>(time_in_old_scale) / old_scale * new_scale;
+}
+}  // namespace
+
+namespace media {
+namespace mp4 {
+
+MP4Segmenter::MP4Segmenter(const MuxerOptions& options,
+                           FileType* ftyp,
+                           Movie* moov)
+    : options_(options),
+      fragment_buffer_(new BufferWriter()),
+      ftyp_(ftyp),
+      moov_(moov),
+      moof_(new MovieFragment()),
+      sidx_(new SegmentIndex()),
+      segment_initialized_(false),
+      end_of_segment_(false) {}
+
+MP4Segmenter::~MP4Segmenter() { STLDeleteElements(&fragmenters_); }
+
+Status MP4Segmenter::Initialize(EncryptorSource* encryptor_source,
+                                const std::vector<MediaStream*>& streams) {
+  DCHECK_LT(0, streams.size());
+  moof_->header.sequence_number = 0;
+
+  moof_->tracks.resize(streams.size());
+  segment_durations_.resize(streams.size());
+  fragmenters_.resize(streams.size());
+  for (uint32 i = 0; i < streams.size(); ++i) {
+    stream_map_[streams[i]] = i;
+    moof_->tracks[i].header.track_id = i + 1;
+    uint8 nalu_length_size = 0;
+    if (streams[i]->info()->stream_type() == kStreamVideo) {
+      VideoStreamInfo* video =
+          static_cast<VideoStreamInfo*>(streams[i]->info().get());
+      nalu_length_size = video->nalu_length_size();
+      // We use the first video stream as the reference stream.
+      if (sidx_->reference_id == 0)
+        sidx_->reference_id = i + 1;
+    }
+    int64 clear_time = 0;
+    if (encryptor_source) {
+      clear_time = encryptor_source->clear_milliseconds() / 1000.0 *
+                   streams[i]->info()->time_scale();
+    }
+    fragmenters_[i] = new MP4Fragmenter(
+        &moof_->tracks[i], encryptor_source, clear_time, nalu_length_size);
+  }
+
+  // Choose the first stream if there is no VIDEO.
+  if (sidx_->reference_id == 0)
+    sidx_->reference_id = 1;
+  sidx_->timescale = streams[GetReferenceStreamId()]->info()->time_scale();
+
+  // Use the reference stream's time scale as movie time scale.
+  moov_->header.timescale = sidx_->timescale;
+  InitializeFragments();
+  return Status::OK;
+}
+
+Status MP4Segmenter::Finalize() {
+  end_of_segment_ = true;
+  for (std::vector<MP4Fragmenter*>::iterator it = fragmenters_.begin();
+       it != fragmenters_.end();
+       ++it) {
+    Status status = FinalizeFragment(*it);
+    if (!status.ok())
+      return status;
+  }
+
+  // Set tracks and moov durations.
+  // Note that the updated moov box will be written to output file for VOD case
+  // only.
+  for (std::vector<Track>::iterator track = moov_->tracks.begin();
+       track != moov_->tracks.end();
+       ++track) {
+    track->header.duration = Rescale(track->media.header.duration,
+                                     track->media.header.timescale,
+                                     moov_->header.timescale);
+    if (track->header.duration > moov_->header.duration)
+      moov_->header.duration = track->header.duration;
+  }
+
+  return Status::OK;
+}
+
+Status MP4Segmenter::AddSample(const MediaStream* stream,
+                               scoped_refptr<MediaSample> sample) {
+  // Find the fragmenter for this stream.
+  DCHECK(stream != NULL && stream_map_.find(stream) != stream_map_.end());
+  uint32 stream_id = stream_map_[stream];
+  MP4Fragmenter* fragmenter = fragmenters_[stream_id];
+
+  // Set default sample duration if it has not been set yet.
+  if (moov_->extends.tracks[stream_id].default_sample_duration == 0) {
+    moov_->extends.tracks[stream_id].default_sample_duration =
+        sample->duration();
+  }
+
+  if (!segment_initialized_) {
+    InitializeSegment();
+    segment_initialized_ = true;
+  }
+
+  if (fragmenter->fragment_finalized()) {
+    return Status(error::FRAGMENT_FINALIZED,
+                  "Current fragment is finalized already.");
+  }
+
+  bool finalize_fragment = false;
+  if (fragmenter->fragment_duration() >=
+      options_.fragment_duration * stream->info()->time_scale()) {
+    if (sample->is_key_frame() || !options_.fragment_sap_aligned) {
+      finalize_fragment = true;
+    }
+  }
+  if (segment_durations_[stream_id] >=
+      options_.segment_duration * stream->info()->time_scale()) {
+    if (sample->is_key_frame() || !options_.segment_sap_aligned) {
+      end_of_segment_ = true;
+      finalize_fragment = true;
+    }
+  }
+
+  Status status;
+  if (finalize_fragment) {
+    status = FinalizeFragment(fragmenter);
+    if (!status.ok())
+      return status;
+  }
+
+  status = fragmenter->AddSample(sample);
+  if (!status.ok())
+    return status;
+
+  moov_->tracks[stream_id].media.header.duration += sample->duration();
+  segment_durations_[stream_id] += sample->duration();
+  return Status::OK;
+}
+
+void MP4Segmenter::InitializeSegment() {
+  sidx_->references.clear();
+  end_of_segment_ = false;
+  std::vector<uint64>::iterator it = segment_durations_.begin();
+  for (; it != segment_durations_.end(); ++it)
+    *it = 0;
+}
+
+Status MP4Segmenter::FinalizeSegment() {
+  segment_initialized_ = false;
+  return Status::OK;
+}
+
+uint32 MP4Segmenter::GetReferenceStreamId() {
+  DCHECK(sidx_ != NULL);
+  return sidx_->reference_id - 1;
+}
+
+void MP4Segmenter::InitializeFragments() {
+  ++moof_->header.sequence_number;
+  for (std::vector<MP4Fragmenter*>::iterator it = fragmenters_.begin();
+       it != fragmenters_.end();
+       ++it) {
+    (*it)->InitializeFragment();
+  }
+}
+
+Status MP4Segmenter::FinalizeFragment(MP4Fragmenter* fragmenter) {
+  fragmenter->FinalizeFragment();
+
+  // Check if all tracks are ready for fragmentation.
+  for (std::vector<MP4Fragmenter*>::iterator it = fragmenters_.begin();
+       it != fragmenters_.end();
+       ++it) {
+    if (!(*it)->fragment_finalized())
+      return Status::OK;
+  }
+
+  MediaData mdat;
+  // Fill in data offsets. Data offset base is moof size + mdat box size.
+  // (mdat is still empty, mdat size is the same as mdat box size).
+  uint64 base = moof_->ComputeSize() + mdat.ComputeSize();
+  for (uint i = 0; i < moof_->tracks.size(); ++i) {
+    TrackFragment& traf = moof_->tracks[i];
+    MP4Fragmenter* fragmenter = fragmenters_[i];
+    if (fragmenter->aux_data()->Size() > 0) {
+      traf.auxiliary_offset.offsets[0] += base;
+      base += fragmenter->aux_data()->Size();
+    }
+    traf.runs[0].data_offset += base;
+    base += fragmenter->data()->Size();
+  }
+
+  // Generate segment reference.
+  sidx_->references.resize(sidx_->references.size() + 1);
+  fragmenters_[GetReferenceStreamId()]->GenerateSegmentReference(
+      &sidx_->references[sidx_->references.size() - 1]);
+  sidx_->references[sidx_->references.size() - 1].referenced_size = base;
+
+  // Write the fragment to buffer.
+  moof_->Write(fragment_buffer_.get());
+
+  for (uint i = 0; i < moof_->tracks.size(); ++i) {
+    MP4Fragmenter* fragmenter = fragmenters_[i];
+    mdat.data_size =
+        fragmenter->aux_data()->Size() + fragmenter->data()->Size();
+    mdat.Write(fragment_buffer_.get());
+    if (fragmenter->aux_data()->Size()) {
+      fragment_buffer_->AppendBuffer(*fragmenter->aux_data());
+    }
+    fragment_buffer_->AppendBuffer(*fragmenter->data());
+  }
+
+  InitializeFragments();
+
+  if (end_of_segment_)
+    return FinalizeSegment();
+
+  return Status::OK;
+}
+
+}  // namespace mp4
+}  // namespace media

media/mp4/mp4_segmenter.h

@@ -0,0 +1,90 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// This class defines the MP4 Segmenter which is responsible for organizing
+// MP4 fragments into segments/subsegments and package into a MP4 file.
+// Inherited by MP4GeneralSegmenter and MP4VODSegmenter. MP4VODSegmenter defines
+// the segmenter for DASH Video-On-Demand with a single segment for each media
+// presentation while MP4GeneralSegmenter handles all other cases including
+// DASH live profile.
+
+#ifndef MEDIA_MP4_MP4_SEGMENTER_H_
+#define MEDIA_MP4_MP4_SEGMENTER_H_
+
+#include <map>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "media/base/status.h"
+
+namespace media {
+
+struct MuxerOptions;
+
+class BufferWriter;
+class EncryptorSource;
+class MediaSample;
+class MediaStream;
+
+namespace mp4 {
+
+class MP4Fragmenter;
+
+struct FileType;
+struct Movie;
+struct MovieFragment;
+struct SegmentIndex;
+
+class MP4Segmenter {
+ public:
+  // Caller transfers the ownership of |ftyp| and |moov| to this class.
+  MP4Segmenter(const MuxerOptions& options, FileType* ftyp, Movie* moov);
+  virtual ~MP4Segmenter();
+
+  // Initialize the segmenter. Caller retains the ownership of
+  // |encryptor_source|. |encryptor_source| can be NULL.
+  virtual Status Initialize(EncryptorSource* encryptor_source,
+                            const std::vector<MediaStream*>& streams);
+
+  virtual Status Finalize();
+
+  virtual Status AddSample(const MediaStream* stream,
+                           scoped_refptr<MediaSample> sample);
+
+ protected:
+  void InitializeSegment();
+  virtual Status FinalizeSegment();
+
+  uint32 GetReferenceStreamId();
+
+  const MuxerOptions& options() const { return options_; }
+  FileType* ftyp() { return ftyp_.get(); }
+  Movie* moov() { return moov_.get(); }
+  BufferWriter* fragment_buffer() { return fragment_buffer_.get(); }
+  SegmentIndex* sidx() { return sidx_.get(); }
+
+ private:
+  void InitializeFragments();
+  Status FinalizeFragment(MP4Fragmenter* fragment);
+
+  const MuxerOptions& options_;
+  scoped_ptr<FileType> ftyp_;
+  scoped_ptr<Movie> moov_;
+  scoped_ptr<MovieFragment> moof_;
+  scoped_ptr<BufferWriter> fragment_buffer_;
+  scoped_ptr<SegmentIndex> sidx_;
+  std::vector<MP4Fragmenter*> fragmenters_;
+  std::vector<uint64> segment_durations_;
+  std::map<const MediaStream*, uint32> stream_map_;
+  bool segment_initialized_;
+  bool end_of_segment_;
+
+  DISALLOW_COPY_AND_ASSIGN(MP4Segmenter);
+};
+
+}  // namespace mp4
+}  // namespace media
+
+#endif  // MEDIA_MP4_MP4_SEGMENTER_H_

media/mp4/mp4_vod_segmenter.cc

@@ -0,0 +1,140 @@
+// Copyright (c) 2013 Google Inc. 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/mp4_vod_segmenter.h"
+
+#include "media/base/buffer_writer.h"
+#include "media/base/media_stream.h"
+#include "media/base/muxer_options.h"
+#include "media/file/file.h"
+#include "media/mp4/box_definitions.h"
+
+namespace media {
+namespace mp4 {
+
+MP4VODSegmenter::MP4VODSegmenter(const MuxerOptions& options,
+                                 FileType* ftyp,
+                                 Movie* moov)
+    : MP4Segmenter(options, ftyp, moov) {}
+MP4VODSegmenter::~MP4VODSegmenter() {}
+
+Status MP4VODSegmenter::Initialize(EncryptorSource* encryptor_source,
+                                   const std::vector<MediaStream*>& streams) {
+  Status status = MP4Segmenter::Initialize(encryptor_source, streams);
+  if (!status.ok())
+    return status;
+  temp_file_.reset(File::Open(options().temp_file_name.c_str(), "w"));
+  if (temp_file_ == NULL) {
+    return Status(error::FILE_FAILURE,
+                  "Cannot open file to write " + options().temp_file_name);
+  }
+  return Status::OK;
+}
+
+Status MP4VODSegmenter::Finalize() {
+  DCHECK(temp_file_ != NULL && ftyp() != NULL && moov() != NULL &&
+         vod_sidx_ != NULL);
+
+  Status status = MP4Segmenter::Finalize();
+  if (!status.ok())
+    return status;
+
+  // Close the temp file to prepare for reading later.
+  if (!temp_file_.release()->Close()) {
+    return Status(error::FILE_FAILURE,
+                  "Cannot close the temp file " + options().temp_file_name);
+  }
+
+  scoped_ptr<File, FileCloser> file(
+      File::Open(options().output_file_name.c_str(), "w"));
+  if (file == NULL) {
+    return Status(error::FILE_FAILURE,
+                  "Cannot open file to write " + options().output_file_name);
+  }
+
+  // Write ftyp, moov and sidx to output file.
+  scoped_ptr<BufferWriter> buffer(new BufferWriter());
+  ftyp()->Write(buffer.get());
+  moov()->Write(buffer.get());
+  vod_sidx_->Write(buffer.get());
+  status = buffer->WriteToFile(file.get());
+  if (!status.ok())
+    return status;
+
+  // Load the temp file and write to output file.
+  scoped_ptr<File, FileCloser> temp_file(
+      File::Open(options().temp_file_name.c_str(), "r"));
+  if (temp_file == NULL) {
+    return Status(error::FILE_FAILURE,
+                  "Cannot open file to read " + options().temp_file_name);
+  }
+
+  const int kBufSize = 0x40000;  // 256KB.
+  scoped_ptr<uint8[]> buf(new uint8[kBufSize]);
+  while (!temp_file->Eof()) {
+    int64 size = temp_file->Read(buf.get(), kBufSize);
+    if (size <= 0) {
+      return Status(error::FILE_FAILURE,
+                    "Failed to read file " + options().temp_file_name);
+    }
+    int64 size_written = file->Write(buf.get(), size);
+    if (size_written != size) {
+      return Status(error::FILE_FAILURE,
+                    "Failed to write file " + options().output_file_name);
+    }
+  }
+  return Status::OK;
+}
+
+Status MP4VODSegmenter::FinalizeSegment() {
+  Status status = MP4Segmenter::FinalizeSegment();
+  if (!status.ok())
+    return status;
+
+  DCHECK(sidx() != NULL && fragment_buffer() != NULL);
+  // sidx() contains pre-generated segment references with one reference per
+  // fragment. In VOD, this segment is converted into a subsegment, i.e. one
+  // reference, which contains all the fragments in sidx().
+  std::vector<SegmentReference>& refs = sidx()->references;
+  SegmentReference& vod_ref = refs[0];
+  uint64 first_sap_time =
+      refs[0].sap_delta_time + refs[0].earliest_presentation_time;
+  for (uint32 i = 1; i < sidx()->references.size(); ++i) {
+    vod_ref.referenced_size += refs[i].referenced_size;
+    // TODO(kqyang): should we calculate subsegment duration by subtracting
+    // earliest_presentation time instead?
+    vod_ref.subsegment_duration += refs[i].subsegment_duration;
+    vod_ref.earliest_presentation_time = std::min(
+        vod_ref.earliest_presentation_time, refs[i].earliest_presentation_time);
+
+    if (vod_ref.sap_type == SegmentReference::TypeUnknown &&
+        refs[i].sap_type != SegmentReference::TypeUnknown) {
+      vod_ref.sap_type = refs[i].sap_type;
+      first_sap_time =
+          refs[i].sap_delta_time + refs[i].earliest_presentation_time;
+    }
+  }
+  // Calculate sap delta time w.r.t. earliest_presentation_time.
+  if (vod_ref.sap_type != SegmentReference::TypeUnknown) {
+    vod_ref.sap_delta_time =
+        first_sap_time - vod_ref.earliest_presentation_time;
+  }
+
+  // Create segment if it does not exist yet.
+  if (vod_sidx_ == NULL) {
+    vod_sidx_.reset(new SegmentIndex());
+    vod_sidx_->reference_id = sidx()->reference_id;
+    vod_sidx_->timescale = sidx()->timescale;
+    // earliest_presentation_time is the earliest presentation time of any
+    // access unit in the reference stream in the first subsegment.
+    vod_sidx_->earliest_presentation_time = vod_ref.earliest_presentation_time;
+  }
+  vod_sidx_->references.push_back(vod_ref);
+
+  // Append fragment buffer to temp file.
+  return fragment_buffer()->WriteToFile(temp_file_.get());
+}
+
+}  // namespace mp4
+}  // namespace media

media/mp4/mp4_vod_segmenter.h

@@ -0,0 +1,50 @@
+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Segmenter for MP4 Dash Video-On-Demand profile. A single MP4 file with a
+// single segment is created, i.e. with only one SIDX box. The generated media
+// file could contain one to many subsegments with subsegment duration
+// defined by|MuxerOptions.segment_duration|. A subsegment could contain one
+//  to many fragments with fragment duration defined by
+// |MuxerOptions.fragment_duration|. The actual subsegment or fragment duration
+// may not match the defined duration exactly but in a best effort basic, i.e.
+// the segmenter tries to end subsegment/fragment at the first sample with
+// overall subsegment/fragment duration not smaller than defined duration and
+// yet meet SAP requirements. VOD segmenter ignores
+// |MuxerOptions.num_subsegments_per_sidx|.
+
+#ifndef MEDIA_MP4_MP4_VOD_SEGMENTER_H_
+#define MEDIA_MP4_MP4_VOD_SEGMENTER_H_
+
+#include "media/file/file_closer.h"
+#include "media/mp4/mp4_segmenter.h"
+
+namespace media {
+namespace mp4 {
+
+class MP4VODSegmenter : public MP4Segmenter {
+ public:
+  // Caller transfers the ownership of |ftyp| and |moov| to this class.
+  MP4VODSegmenter(const MuxerOptions& options, FileType* ftyp, Movie* moov);
+  ~MP4VODSegmenter();
+
+  // MP4Segmenter implementations.
+  virtual Status Initialize(EncryptorSource* encryptor_source,
+                            const std::vector<MediaStream*>& streams) OVERRIDE;
+  virtual Status Finalize() OVERRIDE;
+
+ protected:
+  virtual Status FinalizeSegment() OVERRIDE;
+
+ private:
+  scoped_ptr<SegmentIndex> vod_sidx_;
+  scoped_ptr<File, FileCloser> temp_file_;
+
+  DISALLOW_COPY_AND_ASSIGN(MP4VODSegmenter);
+};
+
+}  // namespace mp4
+}  // namespace media
+
+#endif  // MEDIA_MP4_MP4_VOD_SEGMENTER_H_

media/test/packager_test.cc

@@ -2,34 +2,57 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/strings/string_number_conversions.h"
 #include "media/base/demuxer.h"
+#include "media/base/fixed_encryptor_source.h"
 #include "media/base/media_sample.h"
 #include "media/base/media_stream.h"
 #include "media/base/muxer.h"
+#include "media/base/muxer_options.h"
 #include "media/base/status_test_util.h"
 #include "media/base/stream_info.h"
 #include "media/base/test_data_util.h"
+#include "media/mp4/mp4_muxer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using ::testing::Combine;
+using ::testing::Values;
+using ::testing::ValuesIn;
+
 namespace {
 const char* kMediaFiles[] = {"bear-1280x720.mp4", "bear-1280x720-av_frag.mp4"};
-}
+
+// Encryption constants.
+const char kKeyIdHex[] = "e5007e6e9dcd5ac095202ed3758382cd";
+const char kKeyHex[] = "6fc96fe628a265b13aeddec0bc421f4d";
+const char kPsshHex[] =
+    "08011210e5007e6e9dcd5ac095202ed3"
+    "758382cd1a0d7769646576696e655f746573742211544553545f"
+    "434f4e54454e545f49445f312a025344";
+const uint32 kClearMilliseconds = 1500;
+
+}  // namespace
 
 namespace media {
 
 class TestingMuxer : public Muxer {
  public:
-  TestingMuxer(const Options& options, EncryptorSource* encryptor_source)
+  TestingMuxer(const MuxerOptions& options, EncryptorSource* encryptor_source)
       : Muxer(options, encryptor_source) {}
 
+  virtual Status Initialize() OVERRIDE {
+    DVLOG(1) << "Initialize is called.";
+    return Status::OK;
+  }
+
   virtual Status AddSample(const MediaStream* stream,
-                           scoped_refptr<MediaSample> sample) {
+                           scoped_refptr<MediaSample> sample) OVERRIDE {
     DVLOG(1) << "Add Sample: " << sample->ToString();
     DVLOG(2) << "To Stream: " << stream->ToString();
     return Status::OK;
   }
 
-  virtual Status Finalize() {
+  virtual Status Finalize() OVERRIDE {
     DVLOG(1) << "Finalize is called.";
     return Status::OK;
   }
@@ -38,31 +61,80 @@ class TestingMuxer : public Muxer {
   DISALLOW_COPY_AND_ASSIGN(TestingMuxer);
 };
 
-class PackagerTest : public ::testing::TestWithParam<const char*> {};
+typedef Muxer* CreateMuxerFunc(const std::string& input_file_name,
+                               EncryptorSource* encryptor_source);
 
-TEST_P(PackagerTest, Remux) {
+Muxer* CreateTestingMuxer(const std::string& input_file_name,
-  Demuxer demuxer(
+                          EncryptorSource* encryptor_source) {
-      GetTestDataFilePath(GetParam()).value(), NULL);
+  MuxerOptions options;
-  ASSERT_OK(demuxer.Initialize());
+  return new TestingMuxer(options, NULL);
-
-  LOG(INFO) << "Num Streams: " << demuxer.num_streams();
-  for (int i = 0; i < demuxer.num_streams(); ++i) {
-    LOG(INFO) << "Streams " << i << " " << demuxer.streams(i)->ToString();
 }
 
-  Muxer::Options options;
+Muxer* CreateNormalMP4Muxer(const std::string& input_file_name,
-  TestingMuxer muxer(options, NULL);
+                            EncryptorSource* encryptor_source) {
+  MuxerOptions options;
+  options.single_segment = true;
+  options.segment_duration = 0.005;
+  options.fragment_duration = 0.002;
+  options.segment_sap_aligned = true;
+  options.fragment_sap_aligned = true;
+  options.num_subsegments_per_sidx = 1;
+  options.output_file_name = "/tmp/clear_" + input_file_name;
+  options.segment_template = "/tmp/template$Number$.m4s";
+  options.temp_file_name = "/tmp/tmp.mp4";
+  return new mp4::MP4Muxer(options, NULL);
+}
 
-  ASSERT_OK(muxer.AddStream(demuxer.streams(0)));
+Muxer* CreateEncryptionMP4Muxer(const std::string& input_file_name,
+                                EncryptorSource* encryptor_source) {
+  MuxerOptions options;
+  options.single_segment = true;
+  options.segment_duration = 0.005;
+  options.fragment_duration = 0.002;
+  options.segment_sap_aligned = true;
+  options.fragment_sap_aligned = true;
+  options.num_subsegments_per_sidx = 1;
+  options.output_file_name = "/tmp/enc_" + input_file_name;
+  options.segment_template = "/tmp/template$Number$.m4s";
+  options.temp_file_name = "/tmp/tmp.mp4";
+  return new mp4::MP4Muxer(options, encryptor_source);
+}
+
+class PackagerTest : public ::testing::TestWithParam<
+                         ::std::tr1::tuple<const char*, CreateMuxerFunc*> > {};
+
+TEST_P(PackagerTest, Remux) {
+  std::string file_name = ::std::tr1::get<0>(GetParam());
+  CreateMuxerFunc* CreateMuxer = ::std::tr1::get<1>(GetParam());
+
+  Demuxer demuxer(GetTestDataFilePath(file_name).value(), NULL);
+  ASSERT_OK(demuxer.Initialize());
+
+  LOG(INFO) << "Num Streams: " << demuxer.streams().size();
+  for (int i = 0; i < demuxer.streams().size(); ++i) {
+    LOG(INFO) << "Streams " << i << " " << demuxer.streams()[i]->ToString();
+  }
+
+  FixedEncryptorSource encryptor_source(
+      kKeyIdHex, kKeyHex, kPsshHex, kClearMilliseconds);
+  EXPECT_OK(encryptor_source.Initialize());
+
+  scoped_ptr<Muxer> muxer(CreateMuxer(file_name, &encryptor_source));
+
+  ASSERT_OK(muxer->AddStream(demuxer.streams()[0]));
+  ASSERT_OK(muxer->Initialize());
 
   // Starts remuxing process.
   ASSERT_OK(demuxer.Run());
 
-  ASSERT_OK(muxer.Finalize());
+  ASSERT_OK(muxer->Finalize());
 }
 
 INSTANTIATE_TEST_CASE_P(PackagerE2ETest,
                         PackagerTest,
-                        ::testing::ValuesIn(kMediaFiles));
+                        Combine(ValuesIn(kMediaFiles),
+                                Values(&CreateTestingMuxer,
+                                       &CreateNormalMP4Muxer,
+                                       &CreateEncryptionMP4Muxer)));
 
 }  // namespace media

packager.gyp

@@ -13,11 +13,17 @@
       'target_name': 'media_base',
       'type': 'static_library',
       'sources': [
+        'media/base/aes_encryptor.cc',
+        'media/base/aes_encryptor.h',
         'media/base/audio_stream_info.cc',
         'media/base/audio_stream_info.h',
         'media/base/bit_reader.cc',
         'media/base/bit_reader.h',
         'media/base/buffers.h',
+        'media/base/buffer_reader.cc',
+        'media/base/buffer_reader.h',
+        'media/base/buffer_writer.cc',
+        'media/base/buffer_writer.h',
         'media/base/byte_queue.cc',
         'media/base/byte_queue.h',
         'media/base/container_names.cc',
@@ -29,7 +35,10 @@
         'media/base/decrypt_config.cc',
         'media/base/decrypt_config.h',
         'media/base/decryptor_source.h',
+        'media/base/encryptor_source.cc',
         'media/base/encryptor_source.h',
+        'media/base/fixed_encryptor_source.cc',
+        'media/base/fixed_encryptor_source.h',
         'media/base/limits.h',
         'media/base/media_parser.h',
         'media/base/media_sample.cc',
@@ -48,6 +57,7 @@
       ],
       'dependencies': [
         'base/base.gyp:base',
+        'third_party/openssl/openssl.gyp:openssl',
       ],
     },
     {
@@ -68,13 +78,16 @@
       'target_name': 'media_base_unittest',
       'type': 'executable',
       'sources': [
+        'media/base/aes_encryptor_unittest.cc',
         'media/base/bit_reader_unittest.cc',
+        'media/base/buffer_writer_unittest.cc',
         'media/base/container_names_unittest.cc',
         'media/base/status_test_util.h',
         'media/base/status_test_util_unittest.cc',
         'media/base/status_unittest.cc',
       ],
       'dependencies': [
+        'file',
         'media_base',
         'media_test_support',
         'testing/gtest.gyp:gtest',
@@ -87,10 +100,14 @@
       'sources': [
         'media/mp4/aac.cc',
         'media/mp4/aac.h',
+        'media/mp4/box.cc',
+        'media/mp4/box.h',
+        'media/mp4/box_buffer_interface.h',
         'media/mp4/box_definitions.cc',
         'media/mp4/box_definitions.h',
         'media/mp4/box_reader.cc',
         'media/mp4/box_reader.h',
+        'media/mp4/box_writer.h',
         'media/mp4/cenc.cc',
         'media/mp4/cenc.h',
         'media/mp4/chunk_info_iterator.cc',
@@ -102,8 +119,18 @@
         'media/mp4/es_descriptor.cc',
         'media/mp4/es_descriptor.h',
         'media/mp4/fourccs.h',
+        'media/mp4/mp4_fragmenter.cc',
+        'media/mp4/mp4_fragmenter.h',
+        'media/mp4/mp4_general_segmenter.cc',
+        'media/mp4/mp4_general_segmenter.h',
         'media/mp4/mp4_media_parser.cc',
         'media/mp4/mp4_media_parser.h',
+        'media/mp4/mp4_muxer.cc',
+        'media/mp4/mp4_muxer.h',
+        'media/mp4/mp4_segmenter.cc',
+        'media/mp4/mp4_segmenter.h',
+        'media/mp4/mp4_vod_segmenter.cc',
+        'media/mp4/mp4_vod_segmenter.h',
         'media/mp4/offset_byte_queue.cc',
         'media/mp4/offset_byte_queue.h',
         'media/mp4/rcheck.h',
@@ -121,6 +148,7 @@
       'type': 'executable',
       'sources': [
         'media/mp4/aac_unittest.cc',
+        'media/mp4/box_definitions_unittest.cc',
         'media/mp4/box_reader_unittest.cc',
         'media/mp4/chunk_info_iterator_unittest.cc',
         'media/mp4/composition_offset_iterator_unittest.cc',
@@ -144,6 +172,7 @@
       'sources': [
         'media/file/file.cc',
         'media/file/file.h',
+        'media/file/file_closer.h',
         'media/file/local_file.cc',
         'media/file/local_file.h',
       ],