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 "modules/audio_coding/codecs/opus/test/audio_ring_buffer.h"
12
13 #include "common_audio/ring_buffer.h"
14 #include "rtc_base/checks.h"
15
16 // This is a simple multi-channel wrapper over the ring_buffer.h C interface.
17
18 namespace webrtc {
19
AudioRingBuffer(size_t channels,size_t max_frames)20 AudioRingBuffer::AudioRingBuffer(size_t channels, size_t max_frames) {
21 buffers_.reserve(channels);
22 for (size_t i = 0; i < channels; ++i)
23 buffers_.push_back(WebRtc_CreateBuffer(max_frames, sizeof(float)));
24 }
25
~AudioRingBuffer()26 AudioRingBuffer::~AudioRingBuffer() {
27 for (auto* buf : buffers_)
28 WebRtc_FreeBuffer(buf);
29 }
30
Write(const float * const * data,size_t channels,size_t frames)31 void AudioRingBuffer::Write(const float* const* data,
32 size_t channels,
33 size_t frames) {
34 RTC_DCHECK_EQ(buffers_.size(), channels);
35 for (size_t i = 0; i < channels; ++i) {
36 const size_t written = WebRtc_WriteBuffer(buffers_[i], data[i], frames);
37 RTC_CHECK_EQ(written, frames);
38 }
39 }
40
Read(float * const * data,size_t channels,size_t frames)41 void AudioRingBuffer::Read(float* const* data, size_t channels, size_t frames) {
42 RTC_DCHECK_EQ(buffers_.size(), channels);
43 for (size_t i = 0; i < channels; ++i) {
44 const size_t read =
45 WebRtc_ReadBuffer(buffers_[i], nullptr, data[i], frames);
46 RTC_CHECK_EQ(read, frames);
47 }
48 }
49
ReadFramesAvailable() const50 size_t AudioRingBuffer::ReadFramesAvailable() const {
51 // All buffers have the same amount available.
52 return WebRtc_available_read(buffers_[0]);
53 }
54
WriteFramesAvailable() const55 size_t AudioRingBuffer::WriteFramesAvailable() const {
56 // All buffers have the same amount available.
57 return WebRtc_available_write(buffers_[0]);
58 }
59
MoveReadPositionForward(size_t frames)60 void AudioRingBuffer::MoveReadPositionForward(size_t frames) {
61 for (auto* buf : buffers_) {
62 const size_t moved =
63 static_cast<size_t>(WebRtc_MoveReadPtr(buf, static_cast<int>(frames)));
64 RTC_CHECK_EQ(moved, frames);
65 }
66 }
67
MoveReadPositionBackward(size_t frames)68 void AudioRingBuffer::MoveReadPositionBackward(size_t frames) {
69 for (auto* buf : buffers_) {
70 const size_t moved = static_cast<size_t>(
71 -WebRtc_MoveReadPtr(buf, -static_cast<int>(frames)));
72 RTC_CHECK_EQ(moved, frames);
73 }
74 }
75
76 } // namespace webrtc
77