| // Copyright (c) 2017 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 "ppapi/proxy/audio_output_resource.h" |
| |
| #include "base/bind.h" |
| #include "base/logging.h" |
| #include "base/numerics/safe_conversions.h" |
| #include "ipc/ipc_platform_file.h" |
| #include "media/base/audio_bus.h" |
| #include "media/base/audio_parameters.h" |
| #include "ppapi/c/pp_errors.h" |
| #include "ppapi/proxy/ppapi_messages.h" |
| #include "ppapi/proxy/resource_message_params.h" |
| #include "ppapi/proxy/serialized_handle.h" |
| #include "ppapi/shared_impl/ppapi_globals.h" |
| #include "ppapi/shared_impl/ppb_audio_config_shared.h" |
| #include "ppapi/shared_impl/resource_tracker.h" |
| #include "ppapi/shared_impl/tracked_callback.h" |
| #include "ppapi/thunk/enter.h" |
| #include "ppapi/thunk/ppb_audio_config_api.h" |
| |
| namespace ppapi { |
| namespace proxy { |
| |
| AudioOutputResource::AudioOutputResource(Connection connection, |
| PP_Instance instance) |
| : PluginResource(connection, instance), |
| open_state_(BEFORE_OPEN), |
| playing_(false), |
| shared_memory_size_(0), |
| audio_output_callback_(NULL), |
| user_data_(NULL), |
| enumeration_helper_(this), |
| bytes_per_second_(0), |
| sample_frame_count_(0), |
| client_buffer_size_bytes_(0) { |
| SendCreate(RENDERER, PpapiHostMsg_AudioOutput_Create()); |
| } |
| |
| AudioOutputResource::~AudioOutputResource() { |
| Close(); |
| } |
| |
| thunk::PPB_AudioOutput_API* AudioOutputResource::AsPPB_AudioOutput_API() { |
| return this; |
| } |
| |
| void AudioOutputResource::OnReplyReceived( |
| const ResourceMessageReplyParams& params, |
| const IPC::Message& msg) { |
| if (!enumeration_helper_.HandleReply(params, msg)) |
| PluginResource::OnReplyReceived(params, msg); |
| } |
| |
| int32_t AudioOutputResource::EnumerateDevices( |
| const PP_ArrayOutput& output, |
| scoped_refptr<TrackedCallback> callback) { |
| return enumeration_helper_.EnumerateDevices(output, callback); |
| } |
| |
| int32_t AudioOutputResource::MonitorDeviceChange( |
| PP_MonitorDeviceChangeCallback callback, |
| void* user_data) { |
| return enumeration_helper_.MonitorDeviceChange(callback, user_data); |
| } |
| |
| int32_t AudioOutputResource::Open( |
| PP_Resource device_ref, |
| PP_Resource config, |
| PPB_AudioOutput_Callback audio_output_callback, |
| void* user_data, |
| scoped_refptr<TrackedCallback> callback) { |
| return CommonOpen(device_ref, config, audio_output_callback, user_data, |
| callback); |
| } |
| |
| PP_Resource AudioOutputResource::GetCurrentConfig() { |
| // AddRef for the caller. |
| if (config_.get()) |
| PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(config_); |
| return config_; |
| } |
| |
| PP_Bool AudioOutputResource::StartPlayback() { |
| if (open_state_ == CLOSED || (open_state_ == BEFORE_OPEN && |
| !TrackedCallback::IsPending(open_callback_))) { |
| return PP_FALSE; |
| } |
| if (playing_) |
| return PP_TRUE; |
| |
| playing_ = true; |
| |
| StartThread(); |
| |
| Post(RENDERER, PpapiHostMsg_AudioOutput_StartOrStop(true)); |
| return PP_TRUE; |
| } |
| |
| PP_Bool AudioOutputResource::StopPlayback() { |
| if (open_state_ == CLOSED) |
| return PP_FALSE; |
| if (!playing_) |
| return PP_TRUE; |
| |
| // If the audio output device hasn't been opened, set |playing_| to false and |
| // return directly. |
| if (open_state_ == BEFORE_OPEN) { |
| playing_ = false; |
| return PP_TRUE; |
| } |
| |
| Post(RENDERER, PpapiHostMsg_AudioOutput_StartOrStop(false)); |
| |
| StopThread(); |
| playing_ = false; |
| |
| return PP_TRUE; |
| } |
| |
| void AudioOutputResource::Close() { |
| if (open_state_ == CLOSED) |
| return; |
| |
| open_state_ = CLOSED; |
| Post(RENDERER, PpapiHostMsg_AudioOutput_Close()); |
| StopThread(); |
| |
| if (TrackedCallback::IsPending(open_callback_)) |
| open_callback_->PostAbort(); |
| } |
| |
| void AudioOutputResource::LastPluginRefWasDeleted() { |
| enumeration_helper_.LastPluginRefWasDeleted(); |
| } |
| |
| void AudioOutputResource::OnPluginMsgOpenReply( |
| const ResourceMessageReplyParams& params) { |
| if (open_state_ == BEFORE_OPEN && params.result() == PP_OK) { |
| IPC::PlatformFileForTransit socket_handle_for_transit = |
| IPC::InvalidPlatformFileForTransit(); |
| params.TakeSocketHandleAtIndex(0, &socket_handle_for_transit); |
| base::SyncSocket::Handle socket_handle = |
| IPC::PlatformFileForTransitToPlatformFile(socket_handle_for_transit); |
| CHECK(socket_handle != base::SyncSocket::kInvalidHandle); |
| |
| SerializedHandle serialized_shared_memory_handle = |
| params.TakeHandleOfTypeAtIndex(1, |
| SerializedHandle::SHARED_MEMORY_REGION); |
| CHECK(serialized_shared_memory_handle.IsHandleValid()); |
| |
| open_state_ = OPENED; |
| SetStreamInfo(base::UnsafeSharedMemoryRegion::Deserialize( |
| serialized_shared_memory_handle.TakeSharedMemoryRegion()), |
| socket_handle); |
| } else { |
| playing_ = false; |
| } |
| |
| // The callback may have been aborted by Close(). |
| if (TrackedCallback::IsPending(open_callback_)) |
| open_callback_->Run(params.result()); |
| } |
| |
| void AudioOutputResource::SetStreamInfo( |
| base::UnsafeSharedMemoryRegion shared_memory_region, |
| base::SyncSocket::Handle socket_handle) { |
| socket_.reset(new base::CancelableSyncSocket(socket_handle)); |
| |
| // Ensure that the allocated memory is enough for the audio bus and buffer |
| // parameters. Note that there might be slightly more allocated memory as |
| // some shared memory implementations round up to the closest 2^n when |
| // allocating. |
| // Example: DCHECK_GE(8208, 8192 + 16) for |sample_frame_count_| = 2048. |
| shared_memory_size_ = media::ComputeAudioOutputBufferSize( |
| kAudioOutputChannels, sample_frame_count_); |
| DCHECK_GE(shared_memory_region.GetSize(), shared_memory_size_); |
| |
| // If we fail to map the shared memory into the caller's address space we |
| // might as well fail here since nothing will work if this is the case. |
| shared_memory_mapping_ = shared_memory_region.MapAt(0, shared_memory_size_); |
| CHECK(shared_memory_mapping_.IsValid()); |
| |
| // Create a new audio bus and wrap the audio data section in shared memory. |
| media::AudioOutputBuffer* buffer = |
| static_cast<media::AudioOutputBuffer*>(shared_memory_mapping_.memory()); |
| audio_bus_ = media::AudioBus::WrapMemory(kAudioOutputChannels, |
| sample_frame_count_, buffer->audio); |
| |
| // Setup integer audio buffer for user audio data |
| client_buffer_size_bytes_ = audio_bus_->frames() * audio_bus_->channels() * |
| kBitsPerAudioOutputSample / 8; |
| client_buffer_.reset(new uint8_t[client_buffer_size_bytes_]); |
| } |
| |
| void AudioOutputResource::StartThread() { |
| // Don't start the thread unless all our state is set up correctly. |
| if (!audio_output_callback_ || !socket_.get() || |
| !shared_memory_mapping_.memory() || !audio_bus_.get() || |
| !client_buffer_.get() || bytes_per_second_ == 0) |
| return; |
| |
| // Clear contents of shm buffer before starting audio thread. This will |
| // prevent a burst of static if for some reason the audio thread doesn't |
| // start up quickly enough. |
| memset(shared_memory_mapping_.memory(), 0, shared_memory_size_); |
| memset(client_buffer_.get(), 0, client_buffer_size_bytes_); |
| |
| DCHECK(!audio_output_thread_.get()); |
| audio_output_thread_.reset( |
| new base::DelegateSimpleThread(this, "plugin_audio_output_thread")); |
| audio_output_thread_->Start(); |
| } |
| |
| void AudioOutputResource::StopThread() { |
| // Shut down the socket to escape any hanging |Receive|s. |
| if (socket_.get()) |
| socket_->Shutdown(); |
| if (audio_output_thread_.get()) { |
| audio_output_thread_->Join(); |
| audio_output_thread_.reset(); |
| } |
| } |
| |
| void AudioOutputResource::Run() { |
| // The shared memory represents AudioOutputBufferParameters and the actual |
| // data buffer stored as an audio bus. |
| media::AudioOutputBuffer* buffer = |
| static_cast<media::AudioOutputBuffer*>(shared_memory_mapping_.memory()); |
| |
| // This is a constantly increasing counter that is used to verify on the |
| // browser side that buffers are in sync. |
| uint32_t buffer_index = 0; |
| |
| while (true) { |
| int pending_data = 0; |
| size_t bytes_read = socket_->Receive(&pending_data, sizeof(pending_data)); |
| if (bytes_read != sizeof(pending_data)) { |
| DCHECK_EQ(bytes_read, 0U); |
| break; |
| } |
| if (pending_data < 0) |
| break; |
| |
| { |
| base::TimeDelta delay = |
| base::TimeDelta::FromMicroseconds(buffer->params.delay_us); |
| |
| audio_output_callback_(client_buffer_.get(), client_buffer_size_bytes_, |
| delay.InSecondsF(), user_data_); |
| } |
| |
| // Deinterleave the audio data into the shared memory as floats. |
| audio_bus_->FromInterleaved(client_buffer_.get(), audio_bus_->frames(), |
| kBitsPerAudioOutputSample / 8); |
| |
| // Inform other side that we have read the data from the shared memory. |
| // Let the other end know which buffer we just filled. The buffer index is |
| // used to ensure the other end is getting the buffer it expects. For more |
| // details on how this works see AudioSyncReader::WaitUntilDataIsReady(). |
| ++buffer_index; |
| size_t bytes_sent = socket_->Send(&buffer_index, sizeof(buffer_index)); |
| if (bytes_sent != sizeof(buffer_index)) { |
| DCHECK_EQ(bytes_sent, 0U); |
| break; |
| } |
| } |
| } |
| |
| int32_t AudioOutputResource::CommonOpen( |
| PP_Resource device_ref, |
| PP_Resource config, |
| PPB_AudioOutput_Callback audio_output_callback, |
| void* user_data, |
| scoped_refptr<TrackedCallback> callback) { |
| std::string device_id; |
| // |device_id| remains empty if |device_ref| is 0, which means the default |
| // device. |
| if (device_ref != 0) { |
| thunk::EnterResourceNoLock<thunk::PPB_DeviceRef_API> enter_device_ref( |
| device_ref, true); |
| if (enter_device_ref.failed()) |
| return PP_ERROR_BADRESOURCE; |
| device_id = enter_device_ref.object()->GetDeviceRefData().id; |
| } |
| |
| if (TrackedCallback::IsPending(open_callback_)) |
| return PP_ERROR_INPROGRESS; |
| if (open_state_ != BEFORE_OPEN) |
| return PP_ERROR_FAILED; |
| |
| if (!audio_output_callback) |
| return PP_ERROR_BADARGUMENT; |
| thunk::EnterResourceNoLock<thunk::PPB_AudioConfig_API> enter_config(config, |
| true); |
| if (enter_config.failed()) |
| return PP_ERROR_BADARGUMENT; |
| |
| config_ = config; |
| audio_output_callback_ = audio_output_callback; |
| user_data_ = user_data; |
| open_callback_ = callback; |
| bytes_per_second_ = kAudioOutputChannels * (kBitsPerAudioOutputSample / 8) * |
| enter_config.object()->GetSampleRate(); |
| sample_frame_count_ = enter_config.object()->GetSampleFrameCount(); |
| |
| PpapiHostMsg_AudioOutput_Open msg( |
| device_id, enter_config.object()->GetSampleRate(), |
| enter_config.object()->GetSampleFrameCount()); |
| Call<PpapiPluginMsg_AudioOutput_OpenReply>( |
| RENDERER, msg, |
| base::Bind(&AudioOutputResource::OnPluginMsgOpenReply, |
| base::Unretained(this))); |
| return PP_OK_COMPLETIONPENDING; |
| } |
| } // namespace proxy |
| } // namespace ppapi |