1/*
2 *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11// Unit tests for FilePlayer.
12
13#include "webrtc/modules/utility/interface/file_player.h"
14
15#include <stdio.h>
16#include <string>
17
18#include "gflags/gflags.h"
19#include "testing/gtest/include/gtest/gtest.h"
20#include "webrtc/base/md5digest.h"
21#include "webrtc/base/stringencode.h"
22#include "webrtc/test/testsupport/fileutils.h"
23
24DEFINE_bool(file_player_output, false, "Generate reference files.");
25
26namespace webrtc {
27
28class FilePlayerTest : public ::testing::Test {
29 protected:
30  static const uint32_t kId = 0;
31  static const FileFormats kFileFormat = kFileFormatWavFile;
32  static const int kSampleRateHz = 8000;
33
34  FilePlayerTest()
35      : player_(FilePlayer::CreateFilePlayer(kId, kFileFormat)),
36        output_file_(NULL) {}
37
38  virtual void SetUp() OVERRIDE {
39    if (FLAGS_file_player_output) {
40      std::string output_file =
41          webrtc::test::OutputPath() + "file_player_unittest_out.pcm";
42      output_file_ = fopen(output_file.c_str(), "wb");
43      ASSERT_TRUE(output_file_ != NULL);
44    }
45  }
46
47  virtual void TearDown() OVERRIDE {
48    if (output_file_)
49      fclose(output_file_);
50  }
51
52  ~FilePlayerTest() { FilePlayer::DestroyFilePlayer(player_); }
53
54  void PlayFileAndCheck(const std::string& input_file,
55                        const std::string& ref_checksum,
56                        int output_length_ms) {
57    const float kScaling = 1;
58    ASSERT_EQ(0,
59              player_->StartPlayingFile(
60                  input_file.c_str(), false, 0, kScaling, 0, 0, NULL));
61    rtc::Md5Digest checksum;
62    for (int i = 0; i < output_length_ms / 10; ++i) {
63      int16_t out[10 * kSampleRateHz / 1000] = {0};
64      int num_samples;
65      EXPECT_EQ(0,
66                player_->Get10msAudioFromFile(out, num_samples, kSampleRateHz));
67      checksum.Update(out, num_samples * sizeof(out[0]));
68      if (FLAGS_file_player_output) {
69        ASSERT_EQ(static_cast<size_t>(num_samples),
70                  fwrite(out, sizeof(out[0]), num_samples, output_file_));
71      }
72    }
73    char checksum_result[rtc::Md5Digest::kSize];
74    EXPECT_EQ(rtc::Md5Digest::kSize,
75              checksum.Finish(checksum_result, rtc::Md5Digest::kSize));
76    EXPECT_EQ(ref_checksum,
77              rtc::hex_encode(checksum_result, sizeof(checksum_result)));
78  }
79
80  FilePlayer* player_;
81  FILE* output_file_;
82};
83
84TEST_F(FilePlayerTest, PlayWavPcmuFile) {
85  const std::string kFileName =
86      test::ResourcePath("utility/encapsulated_pcmu_8khz", "wav");
87  // The file is longer than this, but keeping the output shorter limits the
88  // runtime for the test.
89  const int kOutputLengthMs = 10000;
90  const std::string kRefChecksum = "c74e7fd432d439b1311e1c16815b3e9a";
91
92  PlayFileAndCheck(kFileName, kRefChecksum, kOutputLengthMs);
93}
94
95TEST_F(FilePlayerTest, PlayWavPcm16File) {
96  const std::string kFileName =
97      test::ResourcePath("utility/encapsulated_pcm16b_8khz", "wav");
98  // The file is longer than this, but keeping the output shorter limits the
99  // runtime for the test.
100  const int kOutputLengthMs = 10000;
101  const std::string kRefChecksum = "e41d7e1dac8aeae9f21e8e03cd7ecd71";
102
103  PlayFileAndCheck(kFileName, kRefChecksum, kOutputLengthMs);
104}
105
106}  // namespace webrtc
107