1 /*
2 * Copyright (C) 2010, Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
17 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include "third_party/blink/public/platform/web_audio_bus.h"
26
27 #include "base/memory/scoped_refptr.h"
28 #include "third_party/blink/renderer/platform/audio/audio_bus.h"
29
30 namespace blink {
31
Initialize(unsigned number_of_channels,size_t length,double sample_rate)32 void WebAudioBus::Initialize(unsigned number_of_channels,
33 size_t length,
34 double sample_rate) {
35 scoped_refptr<AudioBus> audio_bus =
36 AudioBus::Create(number_of_channels, length);
37 audio_bus->SetSampleRate(sample_rate);
38
39 if (private_)
40 private_->Release();
41
42 audio_bus->AddRef();
43 private_ = audio_bus.get();
44 }
45
ResizeSmaller(size_t new_length)46 void WebAudioBus::ResizeSmaller(size_t new_length) {
47 DCHECK(private_);
48 if (private_) {
49 DCHECK_LE(new_length, length());
50 private_->ResizeSmaller(new_length);
51 }
52 }
53
Reset()54 void WebAudioBus::Reset() {
55 if (private_) {
56 private_->Release();
57 private_ = nullptr;
58 }
59 }
60
NumberOfChannels() const61 unsigned WebAudioBus::NumberOfChannels() const {
62 if (!private_)
63 return 0;
64 return private_->NumberOfChannels();
65 }
66
length() const67 size_t WebAudioBus::length() const {
68 if (!private_)
69 return 0;
70 return private_->length();
71 }
72
SampleRate() const73 double WebAudioBus::SampleRate() const {
74 if (!private_)
75 return 0;
76 return private_->SampleRate();
77 }
78
ChannelData(unsigned channel_index)79 float* WebAudioBus::ChannelData(unsigned channel_index) {
80 if (!private_)
81 return nullptr;
82 DCHECK_LT(channel_index, NumberOfChannels());
83 return private_->Channel(channel_index)->MutableData();
84 }
85
Release()86 scoped_refptr<AudioBus> WebAudioBus::Release() {
87 scoped_refptr<AudioBus> audio_bus(private_);
88 private_->Release();
89 private_ = nullptr;
90 return audio_bus;
91 }
92
93 } // namespace blink
94