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shaka-packager/packager/media/formats/mp2t/ts_writer_unittest.cc

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// Copyright 2016 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 or at
// https://developers.google.com/open-source/licenses/bsd
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include "packager/base/files/file_path.h"
#include "packager/base/files/file_util.h"
#include "packager/media/base/audio_stream_info.h"
#include "packager/media/base/buffer_writer.h"
#include "packager/media/base/video_stream_info.h"
#include "packager/media/formats/mp2t/pes_packet.h"
#include "packager/media/formats/mp2t/program_map_table_writer.h"
#include "packager/media/formats/mp2t/ts_writer.h"
using ::testing::InSequence;
using ::testing::Return;
using ::testing::_;
namespace shaka {
namespace media {
namespace mp2t {
namespace {
const int kTsPacketSize = 188;
const Codec kCodecForTesting = kCodecH264;
class MockProgramMapTableWriter : public ProgramMapTableWriter {
public:
MockProgramMapTableWriter() : ProgramMapTableWriter(kCodecForTesting) {}
~MockProgramMapTableWriter() override = default;
MOCK_METHOD1(EncryptedSegmentPmt, bool(BufferWriter* writer));
MOCK_METHOD1(ClearSegmentPmt, bool(BufferWriter* writer));
private:
MockProgramMapTableWriter(const MockProgramMapTableWriter&) = delete;
MockProgramMapTableWriter& operator=(const MockProgramMapTableWriter&) =
delete;
bool WriteDescriptors(BufferWriter* writer) const override { return true; }
};
// This is not a real TS Packet. But is used to check that the result from the
// MockProgramMapTableWriter is used at the right place.
const uint8_t kMockPmtWriterData[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23,
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53,
0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B,
0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83,
0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9B,
0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF, 0xB0, 0xB1, 0xB2, 0xB3,
0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA, 0xBB,
};
ACTION(WriteOnePmt) {
BufferWriter* writer = arg0;
writer->AppendArray(kMockPmtWriterData, arraysize(kMockPmtWriterData));
return true;
}
ACTION(WriteTwoPmts) {
BufferWriter* writer = arg0;
writer->AppendArray(kMockPmtWriterData, arraysize(kMockPmtWriterData));
writer->AppendArray(kMockPmtWriterData, arraysize(kMockPmtWriterData));
return true;
}
} // namespace
class TsWriterTest : public ::testing::Test {
protected:
// Checks whether |actual|'s prefix matches with |prefix| and the suffix
// matches with |suffix|. If there is padding, then padding_length specifies
// how long the padding is between prefix and suffix.
// |actual| must be at least 188 bytes long.
void ExpectTsPacketEqual(const uint8_t* prefix,
size_t prefix_size,
int padding_length,
const uint8_t* suffix,
size_t suffix_size,
const uint8_t* actual) {
std::vector<uint8_t> actual_prefix(actual, actual + prefix_size);
EXPECT_EQ(std::vector<uint8_t>(prefix, prefix + prefix_size),
actual_prefix);
// Padding until the payload.
for (size_t i = prefix_size; i < kTsPacketSize - suffix_size; ++i) {
EXPECT_EQ(0xFF, actual[i]) << "at index " << i;
}
std::vector<uint8_t> actual_suffix(actual + prefix_size + padding_length,
actual + kTsPacketSize);
EXPECT_EQ(std::vector<uint8_t>(suffix, suffix + suffix_size),
actual_suffix);
}
};
// Verify that PAT and PMT are correct for clear segment.
// This test covers verifies the PAT, and since it doesn't change, other tests
// shouldn't have to check this.
TEST_F(TsWriterTest, ClearH264Psi) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_)).WillOnce(WriteOnePmt());
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
// 2 TS Packets one for PAT and the fake PMT data.
ASSERT_EQ(376u, buffer_writer.Size());
const uint8_t kExpectedPatPrefix[] = {
0x47, // Sync byte.
0x40, // payload_unit_start_indicator set.
0x00, // pid.
0x30, // Adaptation field and payload are both present. counter = 0.
0xA6, // Adaptation Field length.
0x00, // All adaptation field flags 0.
};
const int kExpectedPatPrefixSize = arraysize(kExpectedPatPrefix);
const uint8_t kExpectedPatPayload[] = {
0x00, // pointer field
0x00,
0xB0, // The last 2 '00' assumes that this PAT is not very long.
0x0D, // Length of the rest of this array.
0x00, 0x00, // Transport stream ID is 0.
0xC1, // version number 0, current next indicator 1.
0x00, // section number
0x00, // last section number
// program number -> PMT PID mapping.
0x00, 0x01, // program number is 1.
0xE0, // first 3 bits is reserved.
0x20, // PMT PID.
// CRC32.
0xf9, 0x62, 0xf5, 0x8b,
};
EXPECT_NO_FATAL_FAILURE(ExpectTsPacketEqual(
kExpectedPatPrefix, kExpectedPatPrefixSize, 165, kExpectedPatPayload,
arraysize(kExpectedPatPayload), buffer_writer.Buffer()));
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + kTsPacketSize,
kTsPacketSize));
}
TEST_F(TsWriterTest, ClearAacPmt) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_)).WillOnce(WriteOnePmt());
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
// 2 TS Packets. PAT, PMT.
ASSERT_EQ(376u, buffer_writer.Size());
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + kTsPacketSize,
kTsPacketSize));
}
// The stream is flaged with will_be_encrypted. Verify that 2 PMTs are created.
// One for clear lead and another for encrypted segments that follow.
TEST_F(TsWriterTest, ClearLeadH264Pmt) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_))
.WillOnce(WriteTwoPmts());
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
ASSERT_EQ(564u, buffer_writer.Size());
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + kTsPacketSize,
kTsPacketSize));
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + 2 * kTsPacketSize,
kTsPacketSize));
}
TEST_F(TsWriterTest, ClearSegmentPmtFailure) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_)).WillOnce(Return(false));
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_FALSE(ts_writer.NewSegment(&buffer_writer));
}
// Check the encrypted segments' PMT (after clear lead).
TEST_F(TsWriterTest, EncryptedSegmentsH264Pmt) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
InSequence s;
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_)).WillOnce(Return(true));
EXPECT_CALL(*mock_pmt_writer, EncryptedSegmentPmt(_)).WillOnce(WriteOnePmt());
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
buffer_writer.Clear();
// Overwrite the file but as encrypted segment.
ts_writer.SignalEncrypted();
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
ASSERT_EQ(376u, buffer_writer.Size());
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + kTsPacketSize,
kTsPacketSize));
}
TEST_F(TsWriterTest, EncryptedSegmentPmtFailure) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
InSequence s;
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_)).WillOnce(Return(true));
EXPECT_CALL(*mock_pmt_writer, EncryptedSegmentPmt(_)).WillOnce(Return(false));
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
ts_writer.SignalEncrypted();
EXPECT_FALSE(ts_writer.NewSegment(&buffer_writer));
}
// Same as ClearLeadH264Pmt but for AAC.
TEST_F(TsWriterTest, ClearLeadAacPmt) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_))
.WillOnce(WriteTwoPmts());
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
ASSERT_EQ(564u, buffer_writer.Size());
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + kTsPacketSize,
kTsPacketSize));
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + 2 * kTsPacketSize,
kTsPacketSize));
}
// Same as EncryptedSegmentsH264Pmt but for AAC.
TEST_F(TsWriterTest, EncryptedSegmentsAacPmt) {
std::unique_ptr<MockProgramMapTableWriter> mock_pmt_writer(
new MockProgramMapTableWriter());
InSequence s;
EXPECT_CALL(*mock_pmt_writer, ClearSegmentPmt(_)).WillOnce(Return(true));
EXPECT_CALL(*mock_pmt_writer, EncryptedSegmentPmt(_)).WillOnce(WriteOnePmt());
BufferWriter buffer_writer;
TsWriter ts_writer(std::move(mock_pmt_writer));
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
buffer_writer.Clear();
// Overwrite the file but as encrypted segment.
ts_writer.SignalEncrypted();
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
ASSERT_EQ(376u, buffer_writer.Size());
EXPECT_EQ(0, memcmp(kMockPmtWriterData, buffer_writer.Buffer() + kTsPacketSize,
kTsPacketSize));
}
TEST_F(TsWriterTest, AddPesPacket) {
TsWriter ts_writer(std::unique_ptr<ProgramMapTableWriter>(
new VideoProgramMapTableWriter(kCodecForTesting)));
BufferWriter buffer_writer;
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
std::unique_ptr<PesPacket> pes(new PesPacket());
pes->set_stream_id(0xE0);
pes->set_pts(0x900);
pes->set_dts(0x900);
const uint8_t kAnyData[] = {
0x12, 0x88, 0x4f, 0x4a,
};
pes->mutable_data()->assign(kAnyData, kAnyData + arraysize(kAnyData));
EXPECT_TRUE(ts_writer.AddPesPacket(std::move(pes), &buffer_writer));
// 3 TS Packets. PAT, PMT, and PES.
ASSERT_EQ(564u, buffer_writer.Size());
const int kPesStartPosition = 376;
// Prefix of the expected output. Rest of the packet should be filled with
// padding.
const uint8_t kExpectedOutputPrefix[] = {
0x47, // Sync byte.
0x40, // payload_unit_start_indicator set.
0x50, // pid.
0x30, // Adaptation field and payload are both present. counter = 0.
0xA0, // Adaptation Field length.
0x10, // pcr flag.
0x00, 0x00, 0x04, 0x80, 0x00, 0x00, // PCR.
};
const uint8_t kExpectedPayload[] = {
0x00, 0x00, 0x01, // Start code.
0xE0, // stream id.
0x00, 0x11, // PES_packet_length.
0x80, // Flags.
0xC0, // PTS and DTS both present.
0x0A, // PES_header_data_length.
0x31, // Since PTS is 0 this is '0011' (fixed) and marker bit at LSB.
0x00, // PTS leading bits 0.
0x01, // PTS 0 followed by marker bit.
0x12, // PTS 0x900 shifted.
0x01, // PTS 0 followed by marker bit.
0x11, // Fixed '0001' followed by marker bit at LSB.
0x00, // DTS leading bits 0.
0x01, // DTS 0 followed by marker bit.
0x12, // DTS 0x900 shifted.
0x01, // DTS 0 followed by marker bit.
0x12, 0x88, 0x4f, 0x4a, // Payload.
};
EXPECT_NO_FATAL_FAILURE(ExpectTsPacketEqual(
kExpectedOutputPrefix, arraysize(kExpectedOutputPrefix), 153,
kExpectedPayload, arraysize(kExpectedPayload),
buffer_writer.Buffer() + kPesStartPosition));
}
// Verify that PES packet > 64KiB can be handled.
TEST_F(TsWriterTest, BigPesPacket) {
TsWriter ts_writer(std::unique_ptr<ProgramMapTableWriter>(
new VideoProgramMapTableWriter(kCodecForTesting)));
BufferWriter buffer_writer;
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
std::unique_ptr<PesPacket> pes(new PesPacket());
pes->set_pts(0);
pes->set_dts(0);
// A little over 2 TS Packets (3 TS Packets).
const std::vector<uint8_t> big_data(400, 0x23);
*pes->mutable_data() = big_data;
EXPECT_TRUE(ts_writer.AddPesPacket(std::move(pes), &buffer_writer));
// The first TsPacket can only carry
// 177 (TS packet size - header - adaptation_field) - 19 (PES header data) =
// 158 bytes of the PES packet payload.
// So this should create
// 2 + 1 + ceil((400 - 158) / 184) = 5 TsPackets.
// Where 184 is the maxium payload of a TS packet.
EXPECT_EQ(5u * 188, buffer_writer.Size());
// Check continuity counter.
EXPECT_EQ(0, (buffer_writer.Buffer()[2 * 188 + 3] & 0xF));
EXPECT_EQ(1, (buffer_writer.Buffer()[3 * 188 + 3] & 0xF));
EXPECT_EQ(2, (buffer_writer.Buffer()[4 * 188 + 3] & 0xF));
}
// Bug found in code review. It should check whether PTS is present not whether
// PTS (implicilty) cast to bool is true.
TEST_F(TsWriterTest, PesPtsZeroNoDts) {
TsWriter ts_writer(std::unique_ptr<ProgramMapTableWriter>(
new VideoProgramMapTableWriter(kCodecForTesting)));
BufferWriter buffer_writer;
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
std::unique_ptr<PesPacket> pes(new PesPacket());
pes->set_stream_id(0xE0);
pes->set_pts(0x0);
const uint8_t kAnyData[] = {
0x12, 0x88, 0x4F, 0x4A,
};
pes->mutable_data()->assign(kAnyData, kAnyData + arraysize(kAnyData));
EXPECT_TRUE(ts_writer.AddPesPacket(std::move(pes), &buffer_writer));
// 3 TS Packets. PAT, PMT, and PES.
ASSERT_EQ(564u, buffer_writer.Size());
const int kPesStartPosition = 376;
// Prefix of the expected output. Rest of the packet should be filled with
// padding.
const uint8_t kExpectedOutputPrefix[] = {
0x47, // Sync byte.
0x40, // payload_unit_start_indicator set.
0x50, // pid.
0x30, // Adaptation field and payload are both present. counter = 0.
0xA5, // Adaptation Field length.
0x10, // pcr flag.
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // PCR.
};
const uint8_t kExpectedPayload[] = {
0x00, 0x00, 0x01, // Start code.
0xE0, // stream id.
0x00, 0x0C, // PES_packet_length.
0x80, // Flags.
0x80, // Only PTS present.
0x05, // PES_header_data_length.
0x21, // Since PTS is 0 this is '0010' (fixed) and marker bit at LSB.
0x00, // PTS 0.
0x01, // PTS 0 followed by marker bit.
0x00, // PTS 0.
0x01, // PTS 0 followed by marker bit.
0x12, 0x88, 0x4F, 0x4A, // Payload.
};
EXPECT_NO_FATAL_FAILURE(ExpectTsPacketEqual(
kExpectedOutputPrefix, arraysize(kExpectedOutputPrefix), 158,
kExpectedPayload, arraysize(kExpectedPayload),
buffer_writer.Buffer() + kPesStartPosition));
}
// Verify that TS packet with payload 183 is handled correctly, e.g.
// adaptation_field_length should be 0.
TEST_F(TsWriterTest, TsPacketPayload183Bytes) {
TsWriter ts_writer(std::unique_ptr<ProgramMapTableWriter>(
new VideoProgramMapTableWriter(kCodecForTesting)));
BufferWriter buffer_writer;
EXPECT_TRUE(ts_writer.NewSegment(&buffer_writer));
std::unique_ptr<PesPacket> pes(new PesPacket());
pes->set_stream_id(0xE0);
pes->set_pts(0x00);
pes->set_dts(0x00);
// Note that first TS packet will have adaptation fields with PCR, so make
// payload big enough so that second PES packet's payload is 183.
// First TS packet can carry 157 bytes of PES payload. The next one should
// carry 183 bytes.
std::vector<uint8_t> pes_payload(157 + 183, 0xAF);
*pes->mutable_data() = pes_payload;
EXPECT_TRUE(ts_writer.AddPesPacket(std::move(pes), &buffer_writer));
const uint8_t kExpectedOutputPrefix[] = {
0x47, // Sync byte.
0x00, // payload_unit_start_indicator set.
0x50, // pid.
0x31, // Adaptation field and payload are both present. counter = 0.
0x00, // Adaptation Field length, 1 byte padding.
};
// 4 TsPackets. PAT, PMT, TsPacket with PES header, TsPacket rest of PES
// payload.
ASSERT_EQ(752u, buffer_writer.Size());
const int kPesStartPosition = 564;
std::vector<uint8_t> actual_prefix(buffer_writer.Buffer() + kPesStartPosition,
buffer_writer.Buffer() + kPesStartPosition + 5);
EXPECT_EQ(
std::vector<uint8_t>(kExpectedOutputPrefix, kExpectedOutputPrefix + 5),
actual_prefix);
}
} // namespace mp2t
} // namespace media
} // namespace shaka
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