media/filters/h264_parser_unittest.cc

// Copyright 2014 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 "base/command_line.h"
#include "base/files/memory_mapped_file.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "media/base/test_data_util.h"
#include "media/filters/h264_parser.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace media {

TEST(H264ParserTest, StreamFileParsing) {
  base::FilePath file_path = GetTestDataFilePath("test-25fps.h264");
  // Number of NALUs in the test stream to be parsed.
  int num_nalus = 759;

  base::MemoryMappedFile stream;
  ASSERT_TRUE(stream.Initialize(file_path))
      << "Couldn't open stream file: " << file_path.MaybeAsASCII();

  H264Parser parser;
  parser.SetStream(stream.data(), stream.length());

  // Parse until the end of stream/unsupported stream/error in stream is found.
  int num_parsed_nalus = 0;
  while (true) {
    media::H264SliceHeader shdr;
    media::H264SEIMessage sei_msg;
    H264NALU nalu;
    H264Parser::Result res = parser.AdvanceToNextNALU(&nalu);
    if (res == H264Parser::kEOStream) {
      DVLOG(1) << "Number of successfully parsed NALUs before EOS: "
               << num_parsed_nalus;
      ASSERT_EQ(num_nalus, num_parsed_nalus);
      return;
    }
    ASSERT_EQ(res, H264Parser::kOk);

    ++num_parsed_nalus;

    int id;
    switch (nalu.nal_unit_type) {
      case H264NALU::kIDRSlice:
      case H264NALU::kNonIDRSlice:
        ASSERT_EQ(parser.ParseSliceHeader(nalu, &shdr), H264Parser::kOk);
        break;

      case H264NALU::kSPS:
        ASSERT_EQ(parser.ParseSPS(&id), H264Parser::kOk);
        break;

      case H264NALU::kPPS:
        ASSERT_EQ(parser.ParsePPS(&id), H264Parser::kOk);
        break;

      case H264NALU::kSEIMessage:
        ASSERT_EQ(parser.ParseSEI(&sei_msg), H264Parser::kOk);
        break;

      default:
        // Skip unsupported NALU.
        DVLOG(4) << "Skipping unsupported NALU";
        break;
    }
  }
}

}  // namespace media