| // 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/logging.h" |
| #include "base/message_loop/message_loop_proxy.h" |
| #include "build/build_config.h" |
| #include "content/child/child_process.h" |
| #include "content/common/media/audio_messages.h" |
| #include "content/renderer/media/audio_message_filter.h" |
| #include "content/renderer/pepper/audio_helper.h" |
| #include "content/renderer/render_thread_impl.h" |
| #include "media/base/audio_hardware_config.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_view_id, |
| 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_view_id, |
| source_render_frame_id, |
| client)) { |
| // Balanced by Release invoked in |
| // PepperPlatformAudioOutput::ShutDownOnIOThread(). |
| audio_output->AddRef(); |
| return audio_output.get(); |
| } |
| return NULL; |
| } |
| |
| bool PepperPlatformAudioOutput::StartPlayback() { |
| if (ipc_) { |
| io_message_loop_proxy_->PostTask( |
| FROM_HERE, |
| base::Bind(&PepperPlatformAudioOutput::StartPlaybackOnIOThread, this)); |
| return true; |
| } |
| return false; |
| } |
| |
| bool PepperPlatformAudioOutput::StopPlayback() { |
| if (ipc_) { |
| io_message_loop_proxy_->PostTask( |
| FROM_HERE, |
| base::Bind(&PepperPlatformAudioOutput::StopPlaybackOnIOThread, this)); |
| 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_ = NULL; |
| io_message_loop_proxy_->PostTask( |
| FROM_HERE, |
| base::Bind(&PepperPlatformAudioOutput::ShutDownOnIOThread, this)); |
| } |
| |
| void PepperPlatformAudioOutput::OnStateChanged( |
| media::AudioOutputIPCDelegate::State state) {} |
| |
| void PepperPlatformAudioOutput::OnStreamCreated( |
| base::SharedMemoryHandle handle, |
| base::SyncSocket::Handle socket_handle, |
| int length) { |
| #if defined(OS_WIN) |
| DCHECK(handle); |
| DCHECK(socket_handle); |
| #else |
| DCHECK_NE(-1, handle.fd); |
| DCHECK_NE(-1, socket_handle); |
| #endif |
| DCHECK(length); |
| |
| if (base::MessageLoopProxy::current().get() == |
| main_message_loop_proxy_.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, length, socket_handle); |
| } else { |
| main_message_loop_proxy_->PostTask( |
| FROM_HERE, |
| base::Bind(&PepperPlatformAudioOutput::OnStreamCreated, |
| this, |
| handle, |
| socket_handle, |
| length)); |
| } |
| } |
| |
| 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_(NULL), |
| main_message_loop_proxy_(base::MessageLoopProxy::current()), |
| io_message_loop_proxy_(ChildProcess::current()->io_message_loop_proxy()) { |
| } |
| |
| bool PepperPlatformAudioOutput::Initialize(int sample_rate, |
| int frames_per_buffer, |
| int source_render_view_id, |
| int source_render_frame_id, |
| AudioHelper* client) { |
| DCHECK(client); |
| client_ = client; |
| |
| RenderThreadImpl* const render_thread = RenderThreadImpl::current(); |
| ipc_ = render_thread->audio_message_filter()->CreateAudioOutputIPC( |
| source_render_view_id, 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_message_loop_proxy_->PostTask( |
| FROM_HERE, |
| base::Bind( |
| &PepperPlatformAudioOutput::InitializeOnIOThread, this, params)); |
| return true; |
| } |
| |
| void PepperPlatformAudioOutput::InitializeOnIOThread( |
| const media::AudioParameters& params) { |
| DCHECK(io_message_loop_proxy_->BelongsToCurrentThread()); |
| const int kSessionId = 0; |
| if (ipc_) |
| ipc_->CreateStream(this, params, kSessionId); |
| } |
| |
| void PepperPlatformAudioOutput::StartPlaybackOnIOThread() { |
| DCHECK(io_message_loop_proxy_->BelongsToCurrentThread()); |
| if (ipc_) |
| ipc_->PlayStream(); |
| } |
| |
| void PepperPlatformAudioOutput::StopPlaybackOnIOThread() { |
| DCHECK(io_message_loop_proxy_->BelongsToCurrentThread()); |
| if (ipc_) |
| ipc_->PauseStream(); |
| } |
| |
| void PepperPlatformAudioOutput::ShutDownOnIOThread() { |
| DCHECK(io_message_loop_proxy_->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 |