media/formats/mp4/h264_annex_b_to_avc_bitstream_converter_unittest.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/formats/mp4/h264_annex_b_to_avc_bitstream_converter.h"

#include <stdint.h>

#include <memory>

#include "base/files/file.h"
#include "base/path_service.h"
#include "media/formats/mp4/box_definitions.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace {

std::vector<uint8_t> ReadTestFile(std::string name) {
  base::FilePath path;
  base::PathService::Get(base::DIR_SOURCE_ROOT, &path);
  path = path.Append(FILE_PATH_LITERAL(
                         "media/formats/mp4/h264_annex_b_fuzz_corpus"))
             .AppendASCII(name);
  base::File f(path, base::File::FLAG_OPEN | base::File::FLAG_READ);
  DCHECK(f.IsValid()) << "path: " << path.AsUTF8Unsafe();
  auto size = f.GetLength();

  std::vector<uint8_t> result(size);
  if (size > 0)
    f.ReadAtCurrentPosAndCheck(result);
  return result;
}

}  // namespace

namespace media {

TEST(H264AnnexBToAvcBitstreamConverterTest, Success) {
  std::string chunks[] = {
      "chunk1-config-idr.bin", "chunk2-non-idr.bin",
      "chunk3-non-idr.bin",    "chunk4-non-idr.bin",
      "chunk5-non-idr.bin",    "chunk6-config-idr.bin",
      "chunk7-non-idr.bin",    "pps_neq_sps_config_idr.bin"};
  H264AnnexBToAvcBitstreamConverter converter;

  for (std::string& name : chunks) {
    SCOPED_TRACE(name);
    auto input = ReadTestFile(name);
    SCOPED_TRACE(input.size());
    std::vector<uint8_t> output;
    size_t desired_size = 0;
    bool config_changed = false;

    auto status =
        converter.ConvertChunk(input, output, &config_changed, &desired_size);
    ASSERT_EQ(status.code(), MP4Status::Codes::kBufferTooSmall);
    output.resize(desired_size);

    status = converter.ConvertChunk(input, output, &config_changed, nullptr);
    EXPECT_TRUE(status.is_ok()) << status.message();

    auto& config = converter.GetCurrentConfig();
    if (name.find("config") != std::string::npos) {
      // Chunks with configuration
      EXPECT_TRUE(config_changed);

      EXPECT_EQ(config.version, 1);
      EXPECT_EQ(config.profile_indication, 66);
      EXPECT_EQ(config.profile_compatibility, 3);
      EXPECT_EQ(config.avc_level, 30);
      EXPECT_EQ(config.length_size, 4);
      EXPECT_EQ(config.sps_list.size(), 1ul);
      EXPECT_EQ(config.pps_list.size(), 1ul);
    } else {
      EXPECT_FALSE(config_changed);
    }

    std::vector<uint8_t> config_bin;
    EXPECT_TRUE(config.Serialize(config_bin)) << " file: " << name;
  }
}

// Tests that stream can contain multiple picture parameter sets and switch
// between them without having to reconfigure the decoder.
TEST(H264AnnexBToAvcBitstreamConverterTest, PPS_SwitchWithoutReconfig) {
  std::vector<uint8_t> sps{0x00, 0x00, 0x00, 0x01, 0x27, 0x42, 0x00, 0x1E,
                           0x89, 0x8A, 0x12, 0x05, 0x01, 0x7F, 0xCA, 0x80};
  std::vector<uint8_t> pps1{0x00, 0x00, 0x00, 0x01, 0x28, 0xce, 0x3c, 0x80};
  std::vector<uint8_t> pps2{0x00, 0x00, 0x00, 0x01, 0x28, 0x53, 0x8f, 0x20};
  std::vector<uint8_t> pps3{0x00, 0x00, 0x00, 0x01, 0x28, 0x73, 0x8F, 0x20};
  std::vector<uint8_t> first_frame_idr{
      0x00, 0x00, 0x00, 0x01, 0x25, 0xb4, 0x00, 0x10, 0x00, 0x24, 0xff,
      0xff, 0xf8, 0x7a, 0x28, 0x00, 0x08, 0x0a, 0x7b, 0xdd
      // Encoded data omitted here, it's not important for NALU parsing
  };

  std::vector<uint8_t> first_chunk;
  first_chunk.insert(first_chunk.end(), sps.begin(), sps.end());
  first_chunk.insert(first_chunk.end(), pps1.begin(), pps1.end());
  first_chunk.insert(first_chunk.end(), pps2.begin(), pps2.end());
  first_chunk.insert(first_chunk.end(), pps3.begin(), pps3.end());
  first_chunk.insert(first_chunk.end(), first_frame_idr.begin(),
                     first_frame_idr.end());

  std::vector<uint8_t> second_non_idr_chunk{
      0x00, 0x00, 0x00, 0x01, 0x21, 0xd8, 0x00, 0x80, 0x04,
      0x95, 0x9d, 0x45, 0x70, 0xd9, 0xbe, 0x21, 0xff, 0x87,
      0x20, 0x03, 0x9c, 0x66, 0x84, 0xe1
      // Encoded data omitted here, it's not important for NALU parsing
  };

  H264AnnexBToAvcBitstreamConverter converter;
  std::vector<uint8_t> output(10000);
  bool config_changed = false;

  auto status =
      converter.ConvertChunk(first_chunk, output, &config_changed, nullptr);
  EXPECT_TRUE(status.is_ok()) << status.message();
  EXPECT_TRUE(config_changed);

  status = converter.ConvertChunk(second_non_idr_chunk, output, &config_changed,
                                  nullptr);
  EXPECT_TRUE(status.is_ok()) << status.message();
  EXPECT_FALSE(config_changed);
}

TEST(H264AnnexBToAvcBitstreamConverterTest, Failure) {
  H264AnnexBToAvcBitstreamConverter converter;

  std::vector<uint8_t> input{0x0, 0x0, 0x0, 0x1, 0x9,  0x10,
                             0x0, 0x0, 0x0, 0x1, 0x67, 0x42};
  std::vector<uint8_t> output(input.size());

  auto status = converter.ConvertChunk(input, output, nullptr, nullptr);

  ASSERT_EQ(status.code(), MP4Status::Codes::kInvalidSPS);
}

}  // namespace media