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// Copyright (c) 2006-2009 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 "base/message_loop.h"
#include "base/process.h"
#include "chrome/browser/renderer_host/audio_renderer_host.h"
AudioRendererHost::IPCAudioSource::IPCAudioSource(
AudioRendererHost* host,
int32 id,
AudioOutputStream* stream,
IPC::Message::Sender* sender,
base::ProcessHandle process,
size_t packet_size)
: host_(host),
id_(id),
stream_(stream),
sender_(sender) {
// Make sure we can create and map the shared memory.
DCHECK(shared_memory_.Create(L"", false, false, packet_size) &&
shared_memory_.Map(packet_size));
// Also make sure we can create the buffer and share to render process.
DCHECK(shared_memory_.ShareToProcess(process, &foreign_memory_handle_));
}
AudioRendererHost::IPCAudioSource::~IPCAudioSource() {
}
size_t AudioRendererHost::IPCAudioSource::OnMoreData(AudioOutputStream* stream,
void* dest,
size_t max_size) {
// TODO(hclam): send an IPC message to renderer provided with a
// SharedMemoryHandle for audio renderer inside render process to fill in.
// We should sleep until we receive a notification from render process that
// the buffer is ready or this source is closed or an error is encountered.
// Stuff do there here:
// 1. Prepare the SharedMemory.
// 2. Send an IPC.
// 3. Wait until we receive notification.
return 0;
}
void AudioRendererHost::IPCAudioSource::OnClose(AudioOutputStream* stream) {
// TODO(hclam): should set a flag here and wakes up the thread waiting for
// audio buffer. Should also make sure this call come from the thread as this
// object is created.
// Stuff to do here:
// 1. Send an IPC to renderer about close complete.
// 2. Remove this object from host.
host_->DestroySource(id_);
}
void AudioRendererHost::IPCAudioSource::OnError(AudioOutputStream* stream,
int code) {
// TODO(hclam): make sure this method is received in the same thread as this
// object is created and remove this object and from the map gracefully.
// Stuff to do here:
// 1. Send an IPC to renderer about the error.
// 2. Close the stream so it would get closed.
// TODO(cpu): make sure it is safe to close() in this method.
stream_->Close();
}
void AudioRendererHost::IPCAudioSource::NotifyPacketReady() {
// TODO(hclam): wake the thread waiting for buffer.
}
AudioRendererHost::AudioRendererHost(MessageLoop* message_loop)
: next_id_(INVALID_ID+1),
io_loop_(message_loop) {
// Make sure we perform actual initialization operations in the thread where
// this object should live.
io_loop_->PostTask(FROM_HERE,
NewRunnableMethod(this, &AudioRendererHost::OnInitialized));
}
AudioRendererHost::~AudioRendererHost() {
}
int AudioRendererHost::CreateStream(
IPC::Message::Sender* sender, base::ProcessHandle handle,
AudioManager::Format format, int channels, int sample_rate,
int bits_per_sample, size_t packet_size) {
DCHECK(MessageLoop::current() == io_loop_);
// Create the stream in the first place.
AudioOutputStream* stream = AudioManager::GetAudioManager()->MakeAudioStream(
format, channels, sample_rate, bits_per_sample);
if (!stream)
return INVALID_ID;
// Try to open the stream if we can create it.
if (stream->Open(packet_size)) {
// Create the containing IPCAudioSource and save it to the map.
IPCAudioSource* source =
new IPCAudioSource(this, next_id_++, stream, sender, handle,
packet_size);
sources_.AddWithID(source, source->id());
return source->id();
}
return INVALID_ID;
}
bool AudioRendererHost::Start(int stream_id) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
source->stream()->Start(source);
return true;
}
return false;
}
bool AudioRendererHost::Stop(int stream_id) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
source->stream()->Stop();
return true;
}
return false;
}
bool AudioRendererHost::Close(int stream_id) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
source->stream()->Close();
return true;
}
return false;
}
bool AudioRendererHost::SetVolume(
int stream_id, double left_channel, double right_channel) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
source->stream()->SetVolume(left_channel, right_channel);
}
return false;
}
bool AudioRendererHost::GetVolume(
int stream_id, double* left_channel, double* right_channel) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
source->stream()->GetVolume(left_channel, right_channel);
return true;
}
return false;
}
void AudioRendererHost::NotifyPacketReady(int stream_id) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
source->NotifyPacketReady();
}
}
void AudioRendererHost::DestroyAllStreams() {
DCHECK(MessageLoop::current() == io_loop_);
// TODO(hclam): iterate on the map, close and delete every stream, and clear
// the map.
}
void AudioRendererHost::DestroySource(int stream_id) {
DCHECK(MessageLoop::current() == io_loop_);
IPCAudioSource* source = sources_.Lookup(stream_id);
if (source) {
sources_.Remove(stream_id);
delete source;
}
}
void AudioRendererHost::Destroy() {
// Post a message to the thread where this object should live and do the
// actual operations there.
io_loop_->PostTask(
FROM_HERE, NewRunnableMethod(this, &AudioRendererHost::OnDestroyed));
}
void AudioRendererHost::OnInitialized() {
DCHECK(MessageLoop::current() == io_loop_);
// Increase the ref count of this object so it is active until we do
// Release().
AddRef();
// Also create the AudioManager singleton in this thread.
// TODO(hclam): figure out a better location to initialize the AudioManager
// singleton.
AudioManager::GetAudioManager();
}
void AudioRendererHost::OnDestroyed() {
DCHECK(MessageLoop::current() == io_loop_);
// Destroy audio streams only in the thread it should happen.
// TODO(hclam): make sure we don't call IPC::Message::Sender inside
// IPCAudioSource because it is most likely be destroyed.
DestroyAllStreams();
// Decrease the reference to this object, which may lead to self-destruction.
Release();
}
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