// Copyright (c) 2011 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/file_path.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "media/base/media.h"
#include "media/ffmpeg/ffmpeg_common.h"
#include "testing/gtest/include/gtest/gtest.h"

using base::TimeDelta;

namespace media {

static AVIndexEntry kIndexEntries[] = {
  // pos, timestamp, flags, size, min_distance
  {     0,     0, AVINDEX_KEYFRAME, 0, 0 },
  {  2000,  1000, AVINDEX_KEYFRAME, 0, 0 },
  {  3000,  2000,                0, 0, 0 },
  {  5000,  3000, AVINDEX_KEYFRAME, 0, 0 },
  {  6000,  4000,                0, 0, 0 },
  {  8000,  5000, AVINDEX_KEYFRAME, 0, 0 },
  {  9000,  6000, AVINDEX_KEYFRAME, 0, 0 },
  { 11500,  7000, AVINDEX_KEYFRAME, 0, 0 },
};

static const AVRational kTimeBase = { 1, 1000 };

class FFmpegCommonTest : public testing::Test {
 public:
  FFmpegCommonTest();
  virtual ~FFmpegCommonTest();

 protected:
  AVStream stream_;

  DISALLOW_COPY_AND_ASSIGN(FFmpegCommonTest);
};

static bool InitFFmpeg() {
  static bool initialized = false;
  if (initialized) {
    return true;
  }
  FilePath path;
  PathService::Get(base::DIR_MODULE, &path);
  return media::InitializeMediaLibrary(path);
}

FFmpegCommonTest::FFmpegCommonTest() {
  CHECK(InitFFmpeg());
  stream_.time_base = kTimeBase;
  stream_.index_entries = kIndexEntries;
  stream_.index_entries_allocated_size = sizeof(kIndexEntries);
  stream_.nb_index_entries = arraysize(kIndexEntries);
}

FFmpegCommonTest::~FFmpegCommonTest() {}

TEST_F(FFmpegCommonTest, TestTimeBaseConversions) {
  int64 test_data[][5] = {
    {1, 2, 1, 500000, 1 },
    {1, 3, 1, 333333, 1 },
    {1, 3, 2, 666667, 2 },
  };

  for (size_t i = 0; i < arraysize(test_data); ++i) {
    SCOPED_TRACE(i);

    AVRational time_base;
    time_base.num = static_cast<int>(test_data[i][0]);
    time_base.den = static_cast<int>(test_data[i][1]);

    TimeDelta time_delta = ConvertFromTimeBase(time_base, test_data[i][2]);

    EXPECT_EQ(time_delta.InMicroseconds(), test_data[i][3]);
    EXPECT_EQ(ConvertToTimeBase(time_base, time_delta), test_data[i][4]);
  }
}

}  // namespace media