webm_parser/tests/segment_parser_test.cc - platform/external/libwebm - Git at Google


            
            // Copyright (c) 2016 The WebM project authors. All Rights Reserved.

            
            //

            
            // Use of this source code is governed by a BSD-style license

            
            // that can be found in the LICENSE file in the root of the source

            
            // tree. An additional intellectual property rights grant can be found

            
            // in the file PATENTS.  All contributing project authors may

            
            // be found in the AUTHORS file in the root of the source tree.

            
            #include "src/segment_parser.h"


            #include <cstdint>


            #include "gmock/gmock.h"

            
            #include "gtest/gtest.h"


            #include "test_utils/element_parser_test.h"

            
            #include "webm/id.h"

            
            #include "webm/status.h"


            using testing::_;

            
            using testing::DoAll;

            
            using testing::InSequence;

            
            using testing::NotNull;

            
            using testing::Return;

            
            using testing::SetArgPointee;


            using webm::Action;

            
            using webm::Ancestory;

            
            using webm::ElementMetadata;

            
            using webm::ElementParserTest;

            
            using webm::Id;

            
            using webm::SegmentParser;

            
            using webm::Status;


            namespace {


            class SegmentParserTest

            
                : public ElementParserTest<SegmentParser, Id::kSegment> {};


            TEST_F(SegmentParserTest, EmptyParse) {

            
              {

            
                InSequence dummy;


                EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull())).Times(1);

            
                EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);

            
              }


              ParseAndVerify();

            
            }


            TEST_F(SegmentParserTest, EmptyParseWithDelayedStart) {

            
              {

            
                InSequence dummy;


                EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull()))

            
                    .WillOnce(Return(Status(Status::kOkPartial)))

            
                    .WillOnce(DoAll(SetArgPointee<1>(Action::kRead),

            
                                    Return(Status(Status::kOkCompleted))));


                EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);

            
              }


              IncrementalParseAndVerify();

            
            }


            TEST_F(SegmentParserTest, DefaultValues) {

            
              SetReaderData({

            
                  0x11, 0x4D, 0x9B, 0x74,  // ID = 0x114D9B74 (SeekHead).

            
                  0x80,  // Size = 0.


                  0x15, 0x49, 0xA9, 0x66,  // ID = 0x1549A966 (Info).

            
                  0x80,  // Size = 0.


                  0x1F, 0x43, 0xB6, 0x75,  // ID = 0x1F43B675 (Cluster).

            
                  0x80,  // Size = 0.


                  0x16, 0x54, 0xAE, 0x6B,  // ID = 0x1654AE6B (Tracks).

            
                  0x80,  // Size = 0.


                  0x1C, 0x53, 0xBB, 0x6B,  // ID = 0x1C53BB6B (Cues).

            
                  0x80,  // Size = 0.


                  0x10, 0x43, 0xA7, 0x70,  // ID = 0x1043A770 (Chapters).

            
                  0x80,  // Size = 0.


                  0x12, 0x54, 0xC3, 0x67,  // ID = 0x1254C367 (Tags).

            
                  0x80,  // Size = 0.

            
              });


              {

            
                InSequence dummy;


                EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull())).Times(1);


                ElementMetadata metadata = {Id::kInfo, 5, 0, 5};

            
                EXPECT_CALL(callback_, OnInfo(metadata, _)).Times(1);


                metadata = {Id::kCluster, 5, 0, 10};

            
                EXPECT_CALL(callback_, OnClusterBegin(metadata, _, NotNull())).Times(1);

            
                EXPECT_CALL(callback_, OnClusterEnd(metadata, _)).Times(1);


                EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);

            
              }


              ParseAndVerify();

            
            }


            TEST_F(SegmentParserTest, RepeatedValues) {

            
              SetReaderData({

            
                  // Mutliple SeekHead elements.

            
                  0x11, 0x4D, 0x9B, 0x74,  // ID = 0x114D9B74 (SeekHead).

            
                  0x8D,  // Size = 13.


                  0x4D, 0xBB,  //   ID = 0x4DBB (Seek).

            
                  0x10, 0x00, 0x00, 0x07,  //   Size = 7.


                  0x53, 0xAC,  //     ID = 0x53AC (SeekPosition).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x01,  //     Body (value = 1).


                  0x11, 0x4D, 0x9B, 0x74,  // ID = 0x114D9B74 (SeekHead).

            
                  0x8D,  // Size = 13.


                  0x4D, 0xBB,  //   ID = 0x4DBB (Seek).

            
                  0x10, 0x00, 0x00, 0x07,  //   Size = 7.


                  0x53, 0xAC,  //     ID = 0x53AC (SeekPosition).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x02,  //     Body (value = 2).


                  // Multiple Info elements.

            
                  0x15, 0x49, 0xA9, 0x66,  // ID = 0x1549A966 (Info).

            
                  0x88,  // Size = 8.


                  0x2A, 0xD7, 0xB1,  //   ID = 0x2AD7B1 (TimecodeScale).

            
                  0x10, 0x00, 0x00, 0x01,  //   Size = 1.

            
                  0x01,  //   Body (value = 1).


                  0x15, 0x49, 0xA9, 0x66,  // ID = 0x1549A966 (Info).

            
                  0x88,  // Size = 8.


                  0x2A, 0xD7, 0xB1,  //   ID = 0x2AD7B1 (TimecodeScale).

            
                  0x10, 0x00, 0x00, 0x01,  //   Size = 1.

            
                  0x02,  //   Body (value = 2).


                  // Multiple Cluster elements.

            
                  0x1F, 0x43, 0xB6, 0x75,  // ID = 0x1F43B675 (Cluster).

            
                  0x86,  // Size = 6.


                  0xE7,  //   ID = 0xE7 (Timecode).

            
                  0x10, 0x00, 0x00, 0x01,  //   Size = 1.

            
                  0x01,  //   Body (value = 1).


                  0x1F, 0x43, 0xB6, 0x75,  // ID = 0x1F43B675 (Cluster).

            
                  0x86,  // Size = 6.


                  0xE7,  //   ID = 0xE7 (Timecode).

            
                  0x10, 0x00, 0x00, 0x01,  //   Size = 1.

            
                  0x02,  //   Body (value = 2).


                  // Multiple Tracks elements.

            
                  0x16, 0x54, 0xAE, 0x6B,  // ID = 0x1654AE6B (Tracks).

            
                  0x8B,  // Size = 11.


                  0xAE,  //   ID = 0xAE (TrackEntry).

            
                  0x10, 0x00, 0x00, 0x06,  //   Size = 6.


                  0xD7,  //     ID = 0xD7 (TrackNumber).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x01,  //     Body (value = 1).


                  0x16, 0x54, 0xAE, 0x6B,  // ID = 0x1654AE6B (Tracks).

            
                  0x8B,  // Size = 11.


                  0xAE,  //   ID = 0xAE (TrackEntry).

            
                  0x10, 0x00, 0x00, 0x06,  //   Size = 6.


                  0xD7,  //     ID = 0xD7 (TrackNumber).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x02,  //     Body (value = 2).


                  // Single Cues element.

            
                  0x1C, 0x53, 0xBB, 0x6B,  // ID = 0x1C53BB6B (Cues).

            
                  0x8B,  // Size = 11.


                  0xBB,  //   ID = 0xBB (CuePoint).

            
                  0x10, 0x00, 0x00, 0x06,  //   Size = 6.


                  0xB3,  //     ID = 0xB3 (CueTime).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x01,  //     Body (value = 1).


                  // Single Chapters element.

            
                  0x10, 0x43, 0xA7, 0x70,  // ID = 0x1043A770 (Chapters).

            
                  0x8D,  // Size = 13.


                  0x45, 0xB9,  //   ID = 0x45B9 (EditionEntry).

            
                  0x10, 0x00, 0x00, 0x07,  //   Size = 7.


                  0x45, 0xBC,  //     ID = 0x45BC (EditionUID).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x01,  //     Body (value = 1).


                  // Multiple Tags elements.

            
                  0x12, 0x54, 0xC3, 0x67,  // ID = 0x1254C367 (Tags).

            
                  0x93,  // Size = 19.


                  0x73, 0x73,  //   ID = 0x7373 (Tag).

            
                  0x10, 0x00, 0x00, 0x0D,  //   Size = 13.


                  0x63, 0xC0,  //     ID = 0x63C0 (Targets).

            
                  0x10, 0x00, 0x00, 0x07,  //     Size = 7.


                  0x68, 0xCA,  //       ID = 0x68CA (TargetTypeValue).

            
                  0x10, 0x00, 0x00, 0x01,  //       Size = 1.

            
                  0x01,  //       Body (value = 1).


                  0x12, 0x54, 0xC3, 0x67,  // ID = 0x1254C367 (Tags).

            
                  0x93,  // Size = 19.


                  0x73, 0x73,  //   ID = 0x7373 (Tag).

            
                  0x10, 0x00, 0x00, 0x0D,  //   Size = 13.


                  0x63, 0xC0,  //     ID = 0x63C0 (Targets).

            
                  0x10, 0x00, 0x00, 0x07,  //     Size = 7.


                  0x68, 0xCA,  //       ID = 0x68CA (TargetTypeValue).

            
                  0x10, 0x00, 0x00, 0x01,  //       Size = 1.

            
                  0x02,  //       Body (value = 2).

            
              });


              {

            
                InSequence dummy;


                EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull())).Times(1);


                EXPECT_CALL(callback_, OnSeek(_, _)).Times(2);


                EXPECT_CALL(callback_, OnInfo(_, _)).Times(2);


                EXPECT_CALL(callback_, OnClusterBegin(_, _, NotNull())).Times(1);

            
                EXPECT_CALL(callback_, OnClusterEnd(_, _)).Times(1);


                EXPECT_CALL(callback_, OnClusterBegin(_, _, NotNull())).Times(1);

            
                EXPECT_CALL(callback_, OnClusterEnd(_, _)).Times(1);


                EXPECT_CALL(callback_, OnTrackEntry(_, _)).Times(2);


                EXPECT_CALL(callback_, OnCuePoint(_, _)).Times(1);


                EXPECT_CALL(callback_, OnEditionEntry(_, _)).Times(1);


                EXPECT_CALL(callback_, OnTag(_, _)).Times(2);


                EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);

            
              }


              ParseAndVerify();

            
            }


            TEST_F(SegmentParserTest, Skip) {

            
              SetReaderData({

            
                  0x1F, 0x43, 0xB6, 0x75,  // ID = 0x1F43B675 (Cluster).

            
                  0x80,  // Size = 0.

            
              });


              {

            
                InSequence dummy;


                EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull()))

            
                    .WillOnce(Return(Status(Status::kOkPartial)))

            
                    .WillOnce(DoAll(SetArgPointee<1>(Action::kSkip),

            
                                    Return(Status(Status::kOkCompleted))));


                EXPECT_CALL(callback_, OnClusterBegin(_, _, _)).Times(0);

            
                EXPECT_CALL(callback_, OnClusterEnd(_, _)).Times(0);


                EXPECT_CALL(callback_, OnSegmentEnd(_)).Times(0);

            
              }


              IncrementalParseAndVerify();

            
            }


            TEST_F(SegmentParserTest, Seek) {

            
              SetReaderData({

            
                  // We start the reader at the beginning of a FlagInterlaced element

            
                  // (skipping its ID and size, as they're passed into InitAfterSeek).

            
                  // FlagInterlaced, StereoMode, and AlphaMode are all part of the Video

            
                  // element, with the ancestory: Segment -> Tracks -> TrackEntry -> Video.

            
                  0x01,  // Body (value = 1).


                  0x53, 0xB8,  // ID = 0x53B8 (StereoMode).

            
                  0x10, 0x00, 0x00, 0x01,  // Size = 1.

            
                  0x02,  // Body (value = 2).


                  0x53, 0xC0,  // ID = 0x53C0 (AlphaMode).

            
                  0x10, 0x00, 0x00, 0x01,  // Size = 1.

            
                  0x03,  // Body (value = 3).


                  // Single Cues element.

            
                  0x1C, 0x53, 0xBB, 0x6B,  // ID = 0x1C53BB6B (Cues).

            
                  0x8B,  // Size = 11.


                  0xBB,  //   ID = 0xBB (CuePoint).

            
                  0x10, 0x00, 0x00, 0x06,  //   Size = 6.


                  0xB3,  //     ID = 0xB3 (CueTime).

            
                  0x10, 0x00, 0x00, 0x01,  //     Size = 1.

            
                  0x01,  //     Body (value = 1).

            
              });


              const ElementMetadata flag_interlaced_metadata = {Id::kFlagInterlaced, 0, 1,

            
                                                                0};


              EXPECT_CALL(callback_, OnSegmentBegin(_, _)).Times(0);

            
              {

            
                InSequence dummy;


                EXPECT_CALL(callback_, OnElementBegin(flag_interlaced_metadata, NotNull()))

            
                    .Times(1);


                ElementMetadata metadata = {Id::kStereoMode, 6, 1, 1};

            
                EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);


                metadata = {Id::kAlphaMode, 6, 1, 8};

            
                EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);


                EXPECT_CALL(callback_, OnTrackEntry(_, _)).Times(1);


                metadata = {Id::kCues, 5, 11, 15};

            
                EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);


                metadata = {Id::kCuePoint, 5, 6, 20};

            
                EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);


                metadata = {Id::kCueTime, 5, 1, 25};

            
                EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);


                EXPECT_CALL(callback_, OnCuePoint(_, _)).Times(1);


                EXPECT_CALL(callback_, OnSegmentEnd(_)).Times(1);

            
              }


              Ancestory ancestory;

            
              ASSERT_TRUE(Ancestory::ById(flag_interlaced_metadata.id, &ancestory));

            
              ancestory = ancestory.next();  // Skip the Segment ancestor.


              parser_.InitAfterSeek(ancestory, flag_interlaced_metadata);


              std::uint64_t num_bytes_read = 0;

            
              const Status status = parser_.Feed(&callback_, &reader_, &num_bytes_read);

            
              EXPECT_EQ(Status::kOkCompleted, status.code);

            
              EXPECT_EQ(reader_.size(), num_bytes_read);

            
            }


            }  // namespace
	// Copyright (c) 2016 The WebM project authors. All Rights Reserved.
	//
	// Use of this source code is governed by a BSD-style license
	// that can be found in the LICENSE file in the root of the source
	// tree. An additional intellectual property rights grant can be found
	// in the file PATENTS. All contributing project authors may
	// be found in the AUTHORS file in the root of the source tree.
	#include "src/segment_parser.h"

	#include <cstdint>

	#include "gmock/gmock.h"
	#include "gtest/gtest.h"

	#include "test_utils/element_parser_test.h"
	#include "webm/id.h"
	#include "webm/status.h"

	using testing::_;
	using testing::DoAll;
	using testing::InSequence;
	using testing::NotNull;
	using testing::Return;
	using testing::SetArgPointee;

	using webm::Action;
	using webm::Ancestory;
	using webm::ElementMetadata;
	using webm::ElementParserTest;
	using webm::Id;
	using webm::SegmentParser;
	using webm::Status;

	namespace {

	class SegmentParserTest
	: public ElementParserTest<SegmentParser, Id::kSegment> {};

	TEST_F(SegmentParserTest, EmptyParse) {
	{
	InSequence dummy;

	EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull())).Times(1);
	EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);
	}

	ParseAndVerify();
	}

	TEST_F(SegmentParserTest, EmptyParseWithDelayedStart) {
	{
	InSequence dummy;

	EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull()))
	.WillOnce(Return(Status(Status::kOkPartial)))
	.WillOnce(DoAll(SetArgPointee<1>(Action::kRead),
	Return(Status(Status::kOkCompleted))));

	EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);
	}

	IncrementalParseAndVerify();
	}

	TEST_F(SegmentParserTest, DefaultValues) {
	SetReaderData({
	0x11, 0x4D, 0x9B, 0x74, // ID = 0x114D9B74 (SeekHead).
	0x80, // Size = 0.

	0x15, 0x49, 0xA9, 0x66, // ID = 0x1549A966 (Info).
	0x80, // Size = 0.

	0x1F, 0x43, 0xB6, 0x75, // ID = 0x1F43B675 (Cluster).
	0x80, // Size = 0.

	0x16, 0x54, 0xAE, 0x6B, // ID = 0x1654AE6B (Tracks).
	0x80, // Size = 0.

	0x1C, 0x53, 0xBB, 0x6B, // ID = 0x1C53BB6B (Cues).
	0x80, // Size = 0.

	0x10, 0x43, 0xA7, 0x70, // ID = 0x1043A770 (Chapters).
	0x80, // Size = 0.

	0x12, 0x54, 0xC3, 0x67, // ID = 0x1254C367 (Tags).
	0x80, // Size = 0.
	});

	{
	InSequence dummy;

	EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull())).Times(1);

	ElementMetadata metadata = {Id::kInfo, 5, 0, 5};
	EXPECT_CALL(callback_, OnInfo(metadata, _)).Times(1);

	metadata = {Id::kCluster, 5, 0, 10};
	EXPECT_CALL(callback_, OnClusterBegin(metadata, _, NotNull())).Times(1);
	EXPECT_CALL(callback_, OnClusterEnd(metadata, _)).Times(1);

	EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);
	}

	ParseAndVerify();
	}

	TEST_F(SegmentParserTest, RepeatedValues) {
	SetReaderData({
	// Mutliple SeekHead elements.
	0x11, 0x4D, 0x9B, 0x74, // ID = 0x114D9B74 (SeekHead).
	0x8D, // Size = 13.

	0x4D, 0xBB, // ID = 0x4DBB (Seek).
	0x10, 0x00, 0x00, 0x07, // Size = 7.

	0x53, 0xAC, // ID = 0x53AC (SeekPosition).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	0x11, 0x4D, 0x9B, 0x74, // ID = 0x114D9B74 (SeekHead).
	0x8D, // Size = 13.

	0x4D, 0xBB, // ID = 0x4DBB (Seek).
	0x10, 0x00, 0x00, 0x07, // Size = 7.

	0x53, 0xAC, // ID = 0x53AC (SeekPosition).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x02, // Body (value = 2).

	// Multiple Info elements.
	0x15, 0x49, 0xA9, 0x66, // ID = 0x1549A966 (Info).
	0x88, // Size = 8.

	0x2A, 0xD7, 0xB1, // ID = 0x2AD7B1 (TimecodeScale).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	0x15, 0x49, 0xA9, 0x66, // ID = 0x1549A966 (Info).
	0x88, // Size = 8.

	0x2A, 0xD7, 0xB1, // ID = 0x2AD7B1 (TimecodeScale).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x02, // Body (value = 2).

	// Multiple Cluster elements.
	0x1F, 0x43, 0xB6, 0x75, // ID = 0x1F43B675 (Cluster).
	0x86, // Size = 6.

	0xE7, // ID = 0xE7 (Timecode).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	0x1F, 0x43, 0xB6, 0x75, // ID = 0x1F43B675 (Cluster).
	0x86, // Size = 6.

	0xE7, // ID = 0xE7 (Timecode).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x02, // Body (value = 2).

	// Multiple Tracks elements.
	0x16, 0x54, 0xAE, 0x6B, // ID = 0x1654AE6B (Tracks).
	0x8B, // Size = 11.

	0xAE, // ID = 0xAE (TrackEntry).
	0x10, 0x00, 0x00, 0x06, // Size = 6.

	0xD7, // ID = 0xD7 (TrackNumber).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	0x16, 0x54, 0xAE, 0x6B, // ID = 0x1654AE6B (Tracks).
	0x8B, // Size = 11.

	0xAE, // ID = 0xAE (TrackEntry).
	0x10, 0x00, 0x00, 0x06, // Size = 6.

	0xD7, // ID = 0xD7 (TrackNumber).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x02, // Body (value = 2).

	// Single Cues element.
	0x1C, 0x53, 0xBB, 0x6B, // ID = 0x1C53BB6B (Cues).
	0x8B, // Size = 11.

	0xBB, // ID = 0xBB (CuePoint).
	0x10, 0x00, 0x00, 0x06, // Size = 6.

	0xB3, // ID = 0xB3 (CueTime).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	// Single Chapters element.
	0x10, 0x43, 0xA7, 0x70, // ID = 0x1043A770 (Chapters).
	0x8D, // Size = 13.

	0x45, 0xB9, // ID = 0x45B9 (EditionEntry).
	0x10, 0x00, 0x00, 0x07, // Size = 7.

	0x45, 0xBC, // ID = 0x45BC (EditionUID).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	// Multiple Tags elements.
	0x12, 0x54, 0xC3, 0x67, // ID = 0x1254C367 (Tags).
	0x93, // Size = 19.

	0x73, 0x73, // ID = 0x7373 (Tag).
	0x10, 0x00, 0x00, 0x0D, // Size = 13.

	0x63, 0xC0, // ID = 0x63C0 (Targets).
	0x10, 0x00, 0x00, 0x07, // Size = 7.

	0x68, 0xCA, // ID = 0x68CA (TargetTypeValue).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).

	0x12, 0x54, 0xC3, 0x67, // ID = 0x1254C367 (Tags).
	0x93, // Size = 19.

	0x73, 0x73, // ID = 0x7373 (Tag).
	0x10, 0x00, 0x00, 0x0D, // Size = 13.

	0x63, 0xC0, // ID = 0x63C0 (Targets).
	0x10, 0x00, 0x00, 0x07, // Size = 7.

	0x68, 0xCA, // ID = 0x68CA (TargetTypeValue).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x02, // Body (value = 2).
	});

	{
	InSequence dummy;

	EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull())).Times(1);

	EXPECT_CALL(callback_, OnSeek(_, _)).Times(2);

	EXPECT_CALL(callback_, OnInfo(_, _)).Times(2);

	EXPECT_CALL(callback_, OnClusterBegin(_, _, NotNull())).Times(1);
	EXPECT_CALL(callback_, OnClusterEnd(_, _)).Times(1);

	EXPECT_CALL(callback_, OnClusterBegin(_, _, NotNull())).Times(1);
	EXPECT_CALL(callback_, OnClusterEnd(_, _)).Times(1);

	EXPECT_CALL(callback_, OnTrackEntry(_, _)).Times(2);

	EXPECT_CALL(callback_, OnCuePoint(_, _)).Times(1);

	EXPECT_CALL(callback_, OnEditionEntry(_, _)).Times(1);

	EXPECT_CALL(callback_, OnTag(_, _)).Times(2);

	EXPECT_CALL(callback_, OnSegmentEnd(metadata_)).Times(1);
	}

	ParseAndVerify();
	}

	TEST_F(SegmentParserTest, Skip) {
	SetReaderData({
	0x1F, 0x43, 0xB6, 0x75, // ID = 0x1F43B675 (Cluster).
	0x80, // Size = 0.
	});

	{
	InSequence dummy;

	EXPECT_CALL(callback_, OnSegmentBegin(metadata_, NotNull()))
	.WillOnce(Return(Status(Status::kOkPartial)))
	.WillOnce(DoAll(SetArgPointee<1>(Action::kSkip),
	Return(Status(Status::kOkCompleted))));

	EXPECT_CALL(callback_, OnClusterBegin(_, _, _)).Times(0);
	EXPECT_CALL(callback_, OnClusterEnd(_, _)).Times(0);

	EXPECT_CALL(callback_, OnSegmentEnd(_)).Times(0);
	}

	IncrementalParseAndVerify();
	}

	TEST_F(SegmentParserTest, Seek) {
	SetReaderData({
	// We start the reader at the beginning of a FlagInterlaced element
	// (skipping its ID and size, as they're passed into InitAfterSeek).
	// FlagInterlaced, StereoMode, and AlphaMode are all part of the Video
	// element, with the ancestory: Segment -> Tracks -> TrackEntry -> Video.
	0x01, // Body (value = 1).

	0x53, 0xB8, // ID = 0x53B8 (StereoMode).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x02, // Body (value = 2).

	0x53, 0xC0, // ID = 0x53C0 (AlphaMode).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x03, // Body (value = 3).

	// Single Cues element.
	0x1C, 0x53, 0xBB, 0x6B, // ID = 0x1C53BB6B (Cues).
	0x8B, // Size = 11.

	0xBB, // ID = 0xBB (CuePoint).
	0x10, 0x00, 0x00, 0x06, // Size = 6.

	0xB3, // ID = 0xB3 (CueTime).
	0x10, 0x00, 0x00, 0x01, // Size = 1.
	0x01, // Body (value = 1).
	});

	const ElementMetadata flag_interlaced_metadata = {Id::kFlagInterlaced, 0, 1,
	0};

	EXPECT_CALL(callback_, OnSegmentBegin(_, _)).Times(0);
	{
	InSequence dummy;

	EXPECT_CALL(callback_, OnElementBegin(flag_interlaced_metadata, NotNull()))
	.Times(1);

	ElementMetadata metadata = {Id::kStereoMode, 6, 1, 1};
	EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);

	metadata = {Id::kAlphaMode, 6, 1, 8};
	EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);

	EXPECT_CALL(callback_, OnTrackEntry(_, _)).Times(1);

	metadata = {Id::kCues, 5, 11, 15};
	EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);

	metadata = {Id::kCuePoint, 5, 6, 20};
	EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);

	metadata = {Id::kCueTime, 5, 1, 25};
	EXPECT_CALL(callback_, OnElementBegin(metadata, NotNull())).Times(1);

	EXPECT_CALL(callback_, OnCuePoint(_, _)).Times(1);

	EXPECT_CALL(callback_, OnSegmentEnd(_)).Times(1);
	}

	Ancestory ancestory;
	ASSERT_TRUE(Ancestory::ById(flag_interlaced_metadata.id, &ancestory));
	ancestory = ancestory.next(); // Skip the Segment ancestor.

	parser_.InitAfterSeek(ancestory, flag_interlaced_metadata);

	std::uint64_t num_bytes_read = 0;
	const Status status = parser_.Feed(&callback_, &reader_, &num_bytes_read);
	EXPECT_EQ(Status::kOkCompleted, status.code);
	EXPECT_EQ(reader_.size(), num_bytes_read);
	}

	} // namespace