123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687 |
- // Copyright (c) 2012 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 "remoting/host/audio_capturer_linux.h"
- #include <stdint.h>
- #include <utility>
- #include "base/check.h"
- #include "base/files/file_path.h"
- #include "base/lazy_instance.h"
- #include "base/memory/ptr_util.h"
- #include "remoting/proto/audio.pb.h"
- namespace remoting {
- namespace {
- base::LazyInstance<scoped_refptr<AudioPipeReader>>::Leaky
- g_pulseaudio_pipe_sink_reader = LAZY_INSTANCE_INITIALIZER;
- } // namespace
- // TODO(wez): Remove this and have the DesktopEnvironmentFactory own the
- // AudioPipeReader rather than having it process-global.
- // See crbug.com/161373 and crbug.com/104544.
- void AudioCapturerLinux::InitializePipeReader(
- scoped_refptr<base::SingleThreadTaskRunner> task_runner,
- const base::FilePath& pipe_name) {
- scoped_refptr<AudioPipeReader> pipe_reader;
- if (!pipe_name.empty())
- pipe_reader = AudioPipeReader::Create(task_runner, pipe_name);
- g_pulseaudio_pipe_sink_reader.Get() = pipe_reader;
- }
- AudioCapturerLinux::AudioCapturerLinux(
- scoped_refptr<AudioPipeReader> pipe_reader)
- : pipe_reader_(pipe_reader),
- silence_detector_(0) {
- }
- AudioCapturerLinux::~AudioCapturerLinux() {
- pipe_reader_->RemoveObserver(this);
- }
- bool AudioCapturerLinux::Start(const PacketCapturedCallback& callback) {
- callback_ = callback;
- silence_detector_.Reset(AudioPipeReader::kSamplingRate,
- AudioPipeReader::kChannels);
- pipe_reader_->AddObserver(this);
- return true;
- }
- void AudioCapturerLinux::OnDataRead(
- scoped_refptr<base::RefCountedString> data) {
- DCHECK(!callback_.is_null());
- if (silence_detector_.IsSilence(
- reinterpret_cast<const int16_t*>(data->data().data()),
- data->data().size() / sizeof(int16_t) / AudioPipeReader::kChannels)) {
- return;
- }
- std::unique_ptr<AudioPacket> packet(new AudioPacket());
- packet->add_data(data->data());
- packet->set_encoding(AudioPacket::ENCODING_RAW);
- packet->set_sampling_rate(AudioPipeReader::kSamplingRate);
- packet->set_bytes_per_sample(AudioPipeReader::kBytesPerSample);
- packet->set_channels(AudioPipeReader::kChannels);
- callback_.Run(std::move(packet));
- }
- bool AudioCapturer::IsSupported() {
- return g_pulseaudio_pipe_sink_reader.Get().get() != nullptr;
- }
- std::unique_ptr<AudioCapturer> AudioCapturer::Create() {
- scoped_refptr<AudioPipeReader> reader =
- g_pulseaudio_pipe_sink_reader.Get();
- if (!reader.get())
- return nullptr;
- return base::WrapUnique(new AudioCapturerLinux(reader));
- }
- } // namespace remoting
|