text: // Copyright 2020 The Chromium Authors. 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/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(), StatusCode::kH264BufferTooSmall);
      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;
    }
  }
  
  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(), StatusCode::kH264ParsingError);
  }
  
  }  // namespace media
  