1 /*
2 * Copyright (c) 2015 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 #include "webrtc/common_audio/audio_ring_buffer.h"
12
13 #include "testing/gtest/include/gtest/gtest.h"
14 #include "webrtc/common_audio/channel_buffer.h"
15
16 namespace webrtc {
17
18 class AudioRingBufferTest :
19 public ::testing::TestWithParam< ::testing::tuple<int, int, int, int> > {
20 };
21
ReadAndWriteTest(const ChannelBuffer<float> & input,size_t num_write_chunk_frames,size_t num_read_chunk_frames,size_t buffer_frames,ChannelBuffer<float> * output)22 void ReadAndWriteTest(const ChannelBuffer<float>& input,
23 size_t num_write_chunk_frames,
24 size_t num_read_chunk_frames,
25 size_t buffer_frames,
26 ChannelBuffer<float>* output) {
27 const size_t num_channels = input.num_channels();
28 const size_t total_frames = input.num_frames();
29 AudioRingBuffer buf(num_channels, buffer_frames);
30 rtc::scoped_ptr<float* []> slice(new float* [num_channels]);
31
32 size_t input_pos = 0;
33 size_t output_pos = 0;
34 while (input_pos + buf.WriteFramesAvailable() < total_frames) {
35 // Write until the buffer is as full as possible.
36 while (buf.WriteFramesAvailable() >= num_write_chunk_frames) {
37 buf.Write(input.Slice(slice.get(), input_pos), num_channels,
38 num_write_chunk_frames);
39 input_pos += num_write_chunk_frames;
40 }
41 // Read until the buffer is as empty as possible.
42 while (buf.ReadFramesAvailable() >= num_read_chunk_frames) {
43 EXPECT_LT(output_pos, total_frames);
44 buf.Read(output->Slice(slice.get(), output_pos), num_channels,
45 num_read_chunk_frames);
46 output_pos += num_read_chunk_frames;
47 }
48 }
49
50 // Write and read the last bit.
51 if (input_pos < total_frames) {
52 buf.Write(input.Slice(slice.get(), input_pos), num_channels,
53 total_frames - input_pos);
54 }
55 if (buf.ReadFramesAvailable()) {
56 buf.Read(output->Slice(slice.get(), output_pos), num_channels,
57 buf.ReadFramesAvailable());
58 }
59 EXPECT_EQ(0u, buf.ReadFramesAvailable());
60 }
61
TEST_P(AudioRingBufferTest,ReadDataMatchesWrittenData)62 TEST_P(AudioRingBufferTest, ReadDataMatchesWrittenData) {
63 const size_t kFrames = 5000;
64 const size_t num_channels = ::testing::get<3>(GetParam());
65
66 // Initialize the input data to an increasing sequence.
67 ChannelBuffer<float> input(kFrames, static_cast<int>(num_channels));
68 for (size_t i = 0; i < num_channels; ++i)
69 for (size_t j = 0; j < kFrames; ++j)
70 input.channels()[i][j] = (i + 1) * (j + 1);
71
72 ChannelBuffer<float> output(kFrames, static_cast<int>(num_channels));
73 ReadAndWriteTest(input,
74 ::testing::get<0>(GetParam()),
75 ::testing::get<1>(GetParam()),
76 ::testing::get<2>(GetParam()),
77 &output);
78
79 // Verify the read data matches the input.
80 for (size_t i = 0; i < num_channels; ++i)
81 for (size_t j = 0; j < kFrames; ++j)
82 EXPECT_EQ(input.channels()[i][j], output.channels()[i][j]);
83 }
84
85 INSTANTIATE_TEST_CASE_P(
86 AudioRingBufferTest, AudioRingBufferTest,
87 ::testing::Combine(::testing::Values(10, 20, 42), // num_write_chunk_frames
88 ::testing::Values(1, 10, 17), // num_read_chunk_frames
89 ::testing::Values(100, 256), // buffer_frames
90 ::testing::Values(1, 4))); // num_channels
91
TEST_F(AudioRingBufferTest,MoveReadPosition)92 TEST_F(AudioRingBufferTest, MoveReadPosition) {
93 const size_t kNumChannels = 1;
94 const float kInputArray[] = {1, 2, 3, 4};
95 const size_t kNumFrames = sizeof(kInputArray) / sizeof(*kInputArray);
96 ChannelBuffer<float> input(kNumFrames, kNumChannels);
97 input.SetDataForTesting(kInputArray, kNumFrames);
98 AudioRingBuffer buf(kNumChannels, kNumFrames);
99 buf.Write(input.channels(), kNumChannels, kNumFrames);
100
101 buf.MoveReadPositionForward(3);
102 ChannelBuffer<float> output(1, kNumChannels);
103 buf.Read(output.channels(), kNumChannels, 1);
104 EXPECT_EQ(4, output.channels()[0][0]);
105 buf.MoveReadPositionBackward(3);
106 buf.Read(output.channels(), kNumChannels, 1);
107 EXPECT_EQ(2, output.channels()[0][0]);
108 }
109
110 } // namespace webrtc
111