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// 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 "content/renderer/pepper/pepper_platform_audio_output.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "build/build_config.h"
#include "content/child/child_process.h"
#include "content/renderer/media/audio_output_ipc_factory.h"
#include "content/renderer/pepper/audio_helper.h"
#include "ppapi/shared_impl/ppb_audio_config_shared.h"
namespace content {
// static
PepperPlatformAudioOutput* PepperPlatformAudioOutput::Create(
int sample_rate,
int frames_per_buffer,
int source_render_frame_id,
AudioHelper* client) {
scoped_refptr<PepperPlatformAudioOutput> audio_output(
new PepperPlatformAudioOutput());
if (audio_output->Initialize(sample_rate,
frames_per_buffer,
source_render_frame_id,
client)) {
// Balanced by Release invoked in
// PepperPlatformAudioOutput::ShutDownOnIOThread().
audio_output->AddRef();
return audio_output.get();
}
return nullptr;
}
bool PepperPlatformAudioOutput::StartPlayback() {
if (ipc_) {
io_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&PepperPlatformAudioOutput::StartPlaybackOnIOThread,
this));
return true;
}
return false;
}
bool PepperPlatformAudioOutput::StopPlayback() {
if (ipc_) {
io_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&PepperPlatformAudioOutput::StopPlaybackOnIOThread,
this));
return true;
}
return false;
}
bool PepperPlatformAudioOutput::SetVolume(double volume) {
if (ipc_) {
io_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&PepperPlatformAudioOutput::SetVolumeOnIOThread, this,
volume));
return true;
}
return false;
}
void PepperPlatformAudioOutput::ShutDown() {
// Called on the main thread to stop all audio callbacks. We must only change
// the client on the main thread, and the delegates from the I/O thread.
client_ = nullptr;
io_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&PepperPlatformAudioOutput::ShutDownOnIOThread, this));
}
void PepperPlatformAudioOutput::OnError() {}
void PepperPlatformAudioOutput::OnDeviceAuthorized(
media::OutputDeviceStatus device_status,
const media::AudioParameters& output_params,
const std::string& matched_device_id) {
NOTREACHED();
}
void PepperPlatformAudioOutput::OnStreamCreated(
base::SharedMemoryHandle handle,
base::SyncSocket::Handle socket_handle) {
DCHECK(handle.IsValid());
#if defined(OS_WIN)
DCHECK(socket_handle);
#else
DCHECK_NE(-1, socket_handle);
#endif
DCHECK(handle.GetSize());
if (base::ThreadTaskRunnerHandle::Get().get() == main_task_runner_.get()) {
// Must dereference the client only on the main thread. Shutdown may have
// occurred while the request was in-flight, so we need to NULL check.
if (client_)
client_->StreamCreated(handle, handle.GetSize(), socket_handle);
} else {
main_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&PepperPlatformAudioOutput::OnStreamCreated,
this, handle, socket_handle));
}
}
void PepperPlatformAudioOutput::OnIPCClosed() { ipc_.reset(); }
PepperPlatformAudioOutput::~PepperPlatformAudioOutput() {
// Make sure we have been shut down. Warning: this will usually happen on
// the I/O thread!
DCHECK(!ipc_);
DCHECK(!client_);
}
PepperPlatformAudioOutput::PepperPlatformAudioOutput()
: client_(nullptr),
main_task_runner_(base::ThreadTaskRunnerHandle::Get()),
io_task_runner_(ChildProcess::current()->io_task_runner()) {}
bool PepperPlatformAudioOutput::Initialize(int sample_rate,
int frames_per_buffer,
int source_render_frame_id,
AudioHelper* client) {
DCHECK(client);
client_ = client;
ipc_ = AudioOutputIPCFactory::get()->CreateAudioOutputIPC(
source_render_frame_id);
CHECK(ipc_);
media::AudioParameters params(media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
media::CHANNEL_LAYOUT_STEREO,
sample_rate,
ppapi::kBitsPerAudioOutputSample,
frames_per_buffer);
io_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&PepperPlatformAudioOutput::InitializeOnIOThread, this,
params));
return true;
}
void PepperPlatformAudioOutput::InitializeOnIOThread(
const media::AudioParameters& params) {
DCHECK(io_task_runner_->BelongsToCurrentThread());
if (ipc_)
ipc_->CreateStream(this, params);
}
void PepperPlatformAudioOutput::StartPlaybackOnIOThread() {
DCHECK(io_task_runner_->BelongsToCurrentThread());
if (ipc_)
ipc_->PlayStream();
}
void PepperPlatformAudioOutput::SetVolumeOnIOThread(double volume) {
DCHECK(io_task_runner_->BelongsToCurrentThread());
if (ipc_)
ipc_->SetVolume(volume);
}
void PepperPlatformAudioOutput::StopPlaybackOnIOThread() {
DCHECK(io_task_runner_->BelongsToCurrentThread());
if (ipc_)
ipc_->PauseStream();
}
void PepperPlatformAudioOutput::ShutDownOnIOThread() {
DCHECK(io_task_runner_->BelongsToCurrentThread());
// Make sure we don't call shutdown more than once.
if (!ipc_)
return;
ipc_->CloseStream();
ipc_.reset();
Release(); // Release for the delegate, balances out the reference taken in
// PepperPlatformAudioOutput::Create.
}
} // namespace content
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