Implement write function for cenc and es_descriptor.

And MP4 code clean ups due to mp4 box changes.

Change-Id: I712b2dceb5038bfefa14097fe2fb2ab1fb913cb5

media/base/decrypt_config.cc

@@ -17,8 +17,6 @@ DecryptConfig::DecryptConfig(const std::string& key_id,
       data_offset_(data_offset),
       subsamples_(subsamples) {
   CHECK_GT(key_id.size(), 0u);
-  CHECK(iv.size() == static_cast<size_t>(DecryptConfig::kDecryptionKeySize) ||
-        iv.empty());
   CHECK_GE(data_offset, 0);
 }
 

media/base/decrypt_config.h

@@ -23,7 +23,7 @@ namespace media {
 // result, and then copying each byte from the decrypted block over the
 // position of the corresponding encrypted byte.
 struct SubsampleEntry {
-  uint32 clear_bytes;
+  uint16 clear_bytes;
   uint32 cypher_bytes;
 };
 
@@ -31,12 +31,10 @@ struct SubsampleEntry {
 class DecryptConfig {
  public:
   // Keys are always 128 bits.
-  static const int kDecryptionKeySize = 16;
+  static const size_t kDecryptionKeySize = 16;
 
   // |key_id| is the ID that references the decryption key for this sample.
   // |iv| is the initialization vector defined by the encrypted format.
-  //   Currently |iv| must be 16 bytes as defined by WebM and ISO. Or must be
-  //   empty which signals an unencrypted frame.
   // |data_offset| is the amount of data that should be discarded from the
   //   head of the sample buffer before applying subsample information. A
   //   decrypted buffer will be shorter than an encrypted buffer by this amount.

media/mp4/aac.cc

@@ -37,8 +37,6 @@ AAC::~AAC() {
 }
 
 bool AAC::Parse(const std::vector<uint8>& data) {
-  codec_specific_data_ = data;
-
   if (data.empty())
     return false;
 

media/mp4/aac.h

@@ -30,7 +30,6 @@ class AAC {
   // The function will parse the data and get the ElementaryStreamDescriptor,
   // then it will parse the ElementaryStreamDescriptor to get audio stream
   // configurations.
-  // |data| is always copied to |codec_specific_data_|.
   bool Parse(const std::vector<uint8>& data);
 
   // Gets the output sample rate for the AAC stream.
@@ -61,11 +60,6 @@ class AAC {
     return num_channels_;
   }
 
-  // Returns the codec specific data.
-  std::vector<uint8> codec_specific_data() const {
-    return codec_specific_data_;
-  }
-
   // Size in bytes of the ADTS header added by ConvertEsdsToADTS().
   static const size_t kADTSHeaderSize = 7;
 
@@ -82,8 +76,6 @@ class AAC {
   // Is Parametric Stereo on?
   bool ps_present_;
 
-  std::vector<uint8> codec_specific_data_;
-
   // The following variables store audio configuration information.
   // They are based on the AAC specific configuration but can be overridden
   // by extensions in elementary stream descriptor.

media/mp4/cenc.cc

@@ -6,46 +6,82 @@
 
 #include <cstring>
 
-#include "media/mp4/box_reader.h"
+#include "media/base/buffer_reader.h"
+#include "media/base/buffer_writer.h"
 #include "media/mp4/rcheck.h"
 
+namespace {
+// According to ISO/IEC FDIS 23001-7: CENC spec, IV should be either
+// 64-bit (8-byte) or 128-bit (16-byte).
+bool IsIvSizeValid(size_t iv_size) { return iv_size == 8 || iv_size == 16; }
+
+// 16-bit |clear_bytes| and 32-bit |cypher_bytes|.
+const size_t kSubsampleEntrySize = sizeof(uint16) + sizeof(uint32);
+}  // namespace
+
 namespace media {
 namespace mp4 {
 
 FrameCENCInfo::FrameCENCInfo() {}
+FrameCENCInfo::FrameCENCInfo(const std::vector<uint8>& iv) : iv_(iv) {}
 FrameCENCInfo::~FrameCENCInfo() {}
 
-bool FrameCENCInfo::Parse(int iv_size, BufferReader* reader) {
+bool FrameCENCInfo::Parse(uint8 iv_size, BufferReader* reader) {
-  const int kEntrySize = 6;
+  DCHECK(reader);
-  // Mandated by CENC spec
+  // Mandated by CENC spec.
-  RCHECK(iv_size == 8 || iv_size == 16);
+  RCHECK(IsIvSizeValid(iv_size));
 
-  memset(iv, 0, sizeof(iv));
+  iv_.resize(iv_size);
-  for (int i = 0; i < iv_size; i++)
+  RCHECK(reader->ReadToVector(&iv_, iv_size));
-    RCHECK(reader->Read1(&iv[i]));
 
-  if (!reader->HasBytes(1)) return true;
+  if (!reader->HasBytes(1))
+    return true;
 
   uint16 subsample_count;
   RCHECK(reader->Read2(&subsample_count) &&
-         reader->HasBytes(subsample_count * kEntrySize));
+         reader->HasBytes(subsample_count * kSubsampleEntrySize));
 
-  subsamples.resize(subsample_count);
+  subsamples_.resize(subsample_count);
-  for (int i = 0; i < subsample_count; i++) {
+  for (uint16 i = 0; i < subsample_count; ++i) {
     uint16 clear_bytes;
     uint32 cypher_bytes;
     RCHECK(reader->Read2(&clear_bytes) &&
            reader->Read4(&cypher_bytes));
-    subsamples[i].clear_bytes = clear_bytes;
+    subsamples_[i].clear_bytes = clear_bytes;
-    subsamples[i].cypher_bytes = cypher_bytes;
+    subsamples_[i].cypher_bytes = cypher_bytes;
   }
   return true;
 }
 
+void FrameCENCInfo::Write(BufferWriter* writer) const {
+  DCHECK(writer);
+  DCHECK(IsIvSizeValid(iv_.size()));
+  writer->AppendVector(iv_);
+
+  uint16 subsample_count = subsamples_.size();
+  if (subsample_count == 0)
+    return;
+  writer->AppendInt(subsample_count);
+
+  for (uint16 i = 0; i < subsample_count; ++i) {
+    writer->AppendInt(subsamples_[i].clear_bytes);
+    writer->AppendInt(subsamples_[i].cypher_bytes);
+  }
+}
+
+size_t FrameCENCInfo::ComputeSize() const {
+  uint16 subsample_count = subsamples_.size();
+  if (subsample_count == 0)
+    return iv_.size();
+
+  return iv_.size() + sizeof(subsample_count) +
+         subsample_count * kSubsampleEntrySize;
+}
+
 size_t FrameCENCInfo::GetTotalSizeOfSubsamples() const {
   size_t size = 0;
-  for (size_t i = 0; i < subsamples.size(); i++) {
+  for (size_t i = 0; i < subsamples_.size(); ++i) {
-    size += subsamples[i].clear_bytes + subsamples[i].cypher_bytes;
+    size += subsamples_[i].clear_bytes + subsamples_[i].cypher_bytes;
   }
   return size;
 }

media/mp4/cenc.h

@@ -11,20 +11,37 @@
 #include "media/base/decrypt_config.h"
 
 namespace media {
-namespace mp4 {
 
 class BufferReader;
+class BufferWriter;
 
-struct FrameCENCInfo {
+namespace mp4 {
-  uint8 iv[16];
-  std::vector<SubsampleEntry> subsamples;
 
+class FrameCENCInfo {
+ public:
   FrameCENCInfo();
+  explicit FrameCENCInfo(const std::vector<uint8>& iv);
   ~FrameCENCInfo();
-  bool Parse(int iv_size, BufferReader* r);
-  size_t GetTotalSizeOfSubsamples() const;
-};
 
+  bool Parse(uint8 iv_size, BufferReader* reader);
+  void Write(BufferWriter* writer) const;
+  size_t ComputeSize() const;
+  size_t GetTotalSizeOfSubsamples() const;
+
+  void AddSubsample(const SubsampleEntry& subsample) {
+    subsamples_.push_back(subsample);
+  }
+
+  const std::vector<uint8>& iv() const { return iv_; }
+  const std::vector<SubsampleEntry>& subsamples() const { return subsamples_; }
+
+ private:
+  std::vector<uint8> iv_;
+  std::vector<SubsampleEntry> subsamples_;
+
+  // Not using DISALLOW_COPY_AND_ASSIGN here intentionally to allow the compiler
+  // generated copy constructor and assignment operator.
+};
 
 }  // namespace mp4
 }  // namespace media

media/mp4/chunk_info_iterator_unittest.cc

@@ -4,6 +4,7 @@
 
 #include "media/mp4/chunk_info_iterator.h"
 
+#include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -18,8 +19,8 @@ namespace media {
 namespace mp4 {
 
 const uint32 kNumChunks = 100;
-const ChunkInfo kChunkInfos[] =
+const ChunkInfo kChunkInfos[] = {
-    {{1, 8, 1}, {9, 5, 1}, {25, 7, 2}, {48, 63, 2}, {80, 2, 1}};
+    {1, 8, 1}, {9, 5, 1}, {25, 7, 2}, {48, 63, 2}, {80, 2, 1}};
 
 class ChunkInfoIteratorTest : public testing::Test {
  public:
@@ -33,9 +34,8 @@ class ChunkInfoIteratorTest : public testing::Test {
       uint32 next_first_chunk =
           (i == length - 1) ? kNumChunks + 1 : kChunkInfos[i + 1].first_chunk;
       for (; chunk_index < next_first_chunk; ++chunk_index) {
-        ChunkProperty chunk = {kChunkInfos[i].samples_per_chunk, kChunkInfos[i].sample_description_index};
+        ChunkProperty chunk = {kChunkInfos[i].samples_per_chunk,
-        //chunk.samples_per_chunk = kChunkInfos[i].samples_per_chunk;
+                               kChunkInfos[i].sample_description_index};
-        //chunk.sample_description_index = kChunkInfos[i].sample_description_index;
         chunk_info_table_.push_back(chunk);
       }
     }

media/mp4/es_descriptor.cc

@@ -5,11 +5,36 @@
 #include "media/mp4/es_descriptor.h"
 
 #include "media/base/bit_reader.h"
+#include "media/base/buffer_writer.h"
 #include "media/mp4/rcheck.h"
 
+namespace {
+
+// ISO/IEC 14496-1:2004 Section 7.2.6.6 Table 6: StreamType values.
+enum StreamType {
+  kForbiddenStreamType = 0x00,
+  kObjectDescriptorStreamType = 0x01,
+  kClockReferenceStreamType = 0x02,
+  kSceneDescriptionStreamType = 0x03,
+  kVisualStreamType = 0x04,
+  kAudioStreamType = 0x05,
+  kMPEG7StreamType = 0x06,
+  kIPMPStreamType = 0x07,
+  kObjectContentInfoStreamType = 0x08,
+  kMPEGJStreamType = 0x09,
+  kInteractionStream = 0x0A,
+  kIPMPToolStreamType = 0x0B,
+};
+
+// ISO/IEC 14496-1:2004 Section 7.3.2.3 Table 12: ISO SL Config Descriptor.
+enum SLPredefinedTags {
+  kSLPredefinedNull = 0x01,
+  kSLPredefinedMP4 = 0x02,
+};
+
 // The elementary stream size is specific by up to 4 bytes.
 // The MSB of a byte indicates if there are more bytes for the size.
-static bool ReadESSize(media::BitReader* reader, uint32* size) {
+bool ReadESSize(media::BitReader* reader, uint32* size) {
   uint8 msb;
   uint8 byte;
 
@@ -27,18 +52,18 @@ static bool ReadESSize(media::BitReader* reader, uint32* size) {
   return true;
 }
 
+// Descryptor Header Size: 1 byte tag and 1 byte size (we don't support
+// multi-bytes size for now).
+const size_t kHeaderSize = 2;
+const size_t kMaxDecoderSpecificInfoSize = 64;
+
+}  // namespace
+
 namespace media {
 
 namespace mp4 {
 
-// static
+ESDescriptor::ESDescriptor() : esid_(0), object_type_(kForbidden) {}
-bool ESDescriptor::IsAAC(ObjectType object_type) {
-  return object_type == kISO_14496_3 || object_type == kISO_13818_7_AAC_LC;
-}
-
-ESDescriptor::ESDescriptor()
-    : object_type_(kForbidden) {
-}
 
 ESDescriptor::~ESDescriptor() {}
 
@@ -55,7 +80,7 @@ bool ESDescriptor::Parse(const std::vector<uint8>& data) {
   RCHECK(tag == kESDescrTag);
   RCHECK(ReadESSize(&reader, &size));
 
-  RCHECK(reader.ReadBits(16, &dummy));  // ES_ID
+  RCHECK(reader.ReadBits(16, &esid_));  // ES_ID
   RCHECK(reader.ReadBits(1, &stream_dependency_flag));
   RCHECK(reader.ReadBits(1, &url_flag));
   RCHECK(!url_flag);  // We don't support url flag
@@ -72,14 +97,6 @@ bool ESDescriptor::Parse(const std::vector<uint8>& data) {
   return true;
 }
 
-ObjectType ESDescriptor::object_type() const {
-  return object_type_;
-}
-
-const std::vector<uint8>& ESDescriptor::decoder_specific_info() const {
-  return decoder_specific_info_;
-}
-
 bool ESDescriptor::ParseDecoderConfigDescriptor(BitReader* reader) {
   uint8 tag;
   uint32 size;
@@ -98,6 +115,7 @@ bool ESDescriptor::ParseDecoderConfigDescriptor(BitReader* reader) {
 }
 
 bool ESDescriptor::ParseDecoderSpecificInfo(BitReader* reader) {
+  DCHECK(reader);
   uint8 tag;
   uint32 size;
 
@@ -112,6 +130,65 @@ bool ESDescriptor::ParseDecoderSpecificInfo(BitReader* reader) {
   return true;
 }
 
+void ESDescriptor::Write(BufferWriter* writer) const {
+  // TODO(kqyang): Consider writing Descriptor classes.
+  // ElementaryStreamDescriptor, DecoderConfigDescriptor, SLConfigDescriptor,
+  // DecoderSpecificInfoDescriptor.
+  DCHECK(writer);
+  CHECK_LT(decoder_specific_info_.size(), kMaxDecoderSpecificInfoSize);
+
+  const std::vector<uint8> kEmptyDecodingBufferSize(3, 0);
+  const uint32 kUnknownBitrate = 0;
+  const uint8 kNoEsFlags = 0;
+
+  const uint8 decoder_specific_info_size = decoder_specific_info_.size();
+
+  // 6 bit stream type. The last bit is reserved with 1.
+  const uint8 stream_type = (kAudioStreamType << 2) | 1;
+  const uint8 decoder_config_size = decoder_specific_info_size + kHeaderSize +
+                                    sizeof(uint8) +  // object_type_.
+                                    sizeof(stream_type) +
+                                    kEmptyDecodingBufferSize.size() +
+                                    sizeof(kUnknownBitrate) * 2;
+
+  const uint8 sl_config_size = sizeof(uint8);  // predefined.
+  const uint8 es_size = decoder_config_size + kHeaderSize + sl_config_size +
+                        kHeaderSize + sizeof(esid_) + sizeof(kNoEsFlags);
+
+  writer->AppendInt(static_cast<uint8>(kESDescrTag));
+  writer->AppendInt(es_size);
+  writer->AppendInt(esid_);
+  writer->AppendInt(kNoEsFlags);
+
+  writer->AppendInt(static_cast<uint8>(kDecoderConfigDescrTag));
+  writer->AppendInt(decoder_config_size);
+  writer->AppendInt(static_cast<uint8>(object_type_));
+  writer->AppendInt(stream_type);
+  writer->AppendVector(kEmptyDecodingBufferSize);
+  writer->AppendInt(kUnknownBitrate);  // max_bitrate.
+  writer->AppendInt(kUnknownBitrate);  // avg_bitrate.
+
+  writer->AppendInt(static_cast<uint8>(kDecoderSpecificInfoTag));
+  writer->AppendInt(decoder_specific_info_size);
+  writer->AppendVector(decoder_specific_info_);
+
+  writer->AppendInt(static_cast<uint8>(kSLConfigTag));
+  writer->AppendInt(sl_config_size);
+  writer->AppendInt(static_cast<uint8>(kSLPredefinedMP4));
+}
+
+size_t ESDescriptor::ComputeSize() const {
+  // A bit magical. Refer to ESDescriptor::Write for details.
+  const uint8 decoder_specific_info_size = decoder_specific_info_.size();
+  const uint8 decoder_config_size = decoder_specific_info_size + kHeaderSize +
+                                    sizeof(uint8) * 5 + sizeof(uint32) * 2;
+  const uint8 sl_config_size = sizeof(uint8);
+  const uint8 es_size = decoder_config_size + kHeaderSize +
+                        sl_config_size + kHeaderSize +
+                        sizeof(esid_) + sizeof(uint8);
+  return es_size + kHeaderSize;
+}
+
 }  // namespace mp4
 
 }  // namespace media

media/mp4/es_descriptor.h

@@ -12,6 +12,7 @@
 namespace media {
 
 class BitReader;
+class BufferWriter;
 
 namespace mp4 {
 
@@ -29,27 +30,44 @@ enum ObjectType {
 // Please refer to ISO 14496 Part 1 7.2.6.5 for more details.
 class ESDescriptor {
  public:
-  // Utility function to check if the given object type is AAC.
-  static bool IsAAC(ObjectType object_type);
-
   ESDescriptor();
   ~ESDescriptor();
 
   bool Parse(const std::vector<uint8>& data);
+  void Write(BufferWriter* writer) const;
+  size_t ComputeSize() const;
 
-  ObjectType object_type() const;
+  uint16 esid() const { return esid_; }
-  const std::vector<uint8>& decoder_specific_info() const;
+  void set_esid(uint16 esid) { esid_ = esid; }
+
+  ObjectType object_type() const { return object_type_; }
+  void set_object_type(ObjectType object_type) { object_type_ = object_type; }
+
+  const std::vector<uint8>& decoder_specific_info() const {
+    return decoder_specific_info_;
+  }
+  void set_decoder_specific_info(
+      const std::vector<uint8>& decoder_specific_info) {
+    decoder_specific_info_ = decoder_specific_info;
+  }
+
+  // Check if the stream is AAC.
+  bool IsAAC() const {
+    return object_type_ == kISO_14496_3 || object_type_ == kISO_13818_7_AAC_LC;
+  }
 
  private:
   enum Tag {
     kESDescrTag = 0x03,
     kDecoderConfigDescrTag = 0x04,
-    kDecoderSpecificInfoTag = 0x05
+    kDecoderSpecificInfoTag = 0x05,
+    kSLConfigTag = 0x06,
   };
 
   bool ParseDecoderConfigDescriptor(BitReader* reader);
   bool ParseDecoderSpecificInfo(BitReader* reader);
 
+  uint16 esid_;  // Elementary Stream ID.
   ObjectType object_type_;
   std::vector<uint8> decoder_specific_info_;
 };

media/mp4/rcheck.h

@@ -10,7 +10,7 @@
 #define RCHECK(x)                                           \
   do {                                                      \
     if (!(x)) {                                             \
-        DLOG(ERROR) << "Failure while parsing MP4: " << #x; \
+      LOG(ERROR) << "Failure while processing MP4: " << #x; \
       return false;                                         \
     }                                                       \
   } while (0)

media/mp4/track_run_iterator.cc

@@ -6,6 +6,7 @@
 
 #include <algorithm>
 
+#include "media/base/buffer_reader.h"
 #include "media/mp4/chunk_info_iterator.h"
 #include "media/mp4/composition_offset_iterator.h"
 #include "media/mp4/decoding_time_iterator.h"
@@ -90,12 +91,12 @@ static void PopulateSampleInfo(const TrackExtends& trex,
   uint32 flags;
   if (i < trun.sample_flags.size()) {
     flags = trun.sample_flags[i];
-  } else if (tfhd.flags & kDefaultSampleFlagsPresentMask) {
+  } else if (tfhd.flags & TrackFragmentHeader::kDefaultSampleFlagsPresentMask) {
     flags = tfhd.default_sample_flags;
   } else {
     flags = trex.default_sample_flags;
   }
-  sample_info->is_keyframe = !(flags & kNonKeySampleMask);
+  sample_info->is_keyframe = !(flags & TrackFragmentHeader::kNonKeySampleMask);
 }
 
 // In well-structured encrypted media, each track run will be immediately
@@ -396,6 +397,7 @@ bool TrackRunIterator::AuxInfoNeedsToBeCached() {
   return is_encrypted() && aux_info_size() > 0 && cenc_info_.size() == 0;
 }
 
+// TODO(kqyang): Revisit later. We might not need to cache cenc info.
 // This implementation currently only caches CENC auxiliary info.
 bool TrackRunIterator::CacheAuxInfo(const uint8* buf, int buf_size) {
   RCHECK(AuxInfoNeedsToBeCached() && buf_size >= aux_info_size());
@@ -525,8 +527,9 @@ scoped_ptr<DecryptConfig> TrackRunIterator::GetDecryptConfig() {
   const FrameCENCInfo& cenc_info = cenc_info_[sample_idx];
   DCHECK(is_encrypted() && !AuxInfoNeedsToBeCached());
 
-  if (!cenc_info.subsamples.empty() && (cenc_info.GetTotalSizeOfSubsamples() !=
+  const size_t total_size_of_subsamples = cenc_info.GetTotalSizeOfSubsamples();
-                                        static_cast<size_t>(sample_size()))) {
+  if (total_size_of_subsamples != 0 &&
+      total_size_of_subsamples != static_cast<size_t>(sample_size())) {
     LOG(ERROR) << "Incorrect CENC subsample size.";
     return scoped_ptr<DecryptConfig>();
   }
@@ -534,9 +537,9 @@ scoped_ptr<DecryptConfig> TrackRunIterator::GetDecryptConfig() {
   const std::vector<uint8>& kid = track_encryption().default_kid;
   return scoped_ptr<DecryptConfig>(new DecryptConfig(
       std::string(reinterpret_cast<const char*>(&kid[0]), kid.size()),
-      std::string(cenc_info.iv.begin(), cenc_info.iv.end()),
+      std::string(cenc_info.iv().begin(), cenc_info.iv().end()),
       0,  // No offset to start of media data in MP4 using CENC.
-      cenc_info.subsamples));
+      cenc_info.subsamples()));
 }
 
 }  // namespace mp4

media/mp4/track_run_iterator_unittest.cc

@@ -82,7 +82,8 @@ class TrackRunIteratorTest : public testing::Test {
     moof.tracks.resize(2);
     moof.tracks[0].decode_time.decode_time = 0;
     moof.tracks[0].header.track_id = 1;
-    moof.tracks[0].header.flags = kDefaultSampleFlagsPresentMask;
+    moof.tracks[0].header.flags =
+        TrackFragmentHeader::kDefaultSampleFlagsPresentMask;
     moof.tracks[0].header.default_sample_duration = 1024;
     moof.tracks[0].header.default_sample_size = 4;
     moof.tracks[0].runs.resize(2);
@@ -103,7 +104,8 @@ class TrackRunIteratorTest : public testing::Test {
     SetAscending(&moof.tracks[1].runs[0].sample_durations);
     moof.tracks[1].runs[0].sample_flags.resize(10);
     for (size_t i = 1; i < moof.tracks[1].runs[0].sample_flags.size(); i++) {
-      moof.tracks[1].runs[0].sample_flags[i] = kNonKeySampleMask;
+      moof.tracks[1].runs[0].sample_flags[i] =
+          TrackFragmentHeader::kNonKeySampleMask;
     }
 
     return moof;
@@ -211,7 +213,8 @@ TEST_F(TrackRunIteratorTest, BasicOperationTest) {
 TEST_F(TrackRunIteratorTest, TrackExtendsDefaultsTest) {
   moov_.extends.tracks[0].default_sample_duration = 50;
   moov_.extends.tracks[0].default_sample_size = 3;
-  moov_.extends.tracks[0].default_sample_flags = kNonKeySampleMask;
+  moov_.extends.tracks[0].default_sample_flags =
+      TrackFragmentHeader::kNonKeySampleMask;
   iter_.reset(new TrackRunIterator(&moov_));
   MovieFragment moof = CreateFragment();
   moof.tracks[0].header.flags = 0;
@@ -233,8 +236,10 @@ TEST_F(TrackRunIteratorTest, FirstSampleFlagTest) {
   // defaults for all subsequent samples
   iter_.reset(new TrackRunIterator(&moov_));
   MovieFragment moof = CreateFragment();
-  moof.tracks[1].header.flags = kDefaultSampleFlagsPresentMask;
+  moof.tracks[1].header.flags =
-  moof.tracks[1].header.default_sample_flags = kNonKeySampleMask;
+      TrackFragmentHeader::kDefaultSampleFlagsPresentMask;
+  moof.tracks[1].header.default_sample_flags =
+      TrackFragmentHeader::kNonKeySampleMask;
   moof.tracks[1].runs[0].sample_flags.resize(1);
   ASSERT_TRUE(iter_->Init(moof));
   iter_->AdvanceRun();