content/renderer/pepper/pepper_platform_audio_input.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/pepper/pepper_platform_audio_input.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/message_loop/message_loop_proxy.h"
  10 #include "build/build_config.h"
  11 #include "content/child/child_process.h"
  12 #include "content/renderer/media/audio_input_message_filter.h"
  13 #include "content/renderer/pepper/pepper_audio_input_host.h"
  14 #include "content/renderer/pepper/pepper_media_device_manager.h"
  15 #include "content/renderer/render_frame_impl.h"
  16 #include "content/renderer/render_thread_impl.h"
  17 #include "content/renderer/render_view_impl.h"
  18 #include "media/audio/audio_manager_base.h"
  19 #include "ppapi/shared_impl/ppb_audio_config_shared.h"
  20 #include "url/gurl.h"
  21
  22 namespace content {
  23
  24 // static
  25 PepperPlatformAudioInput* PepperPlatformAudioInput::Create(
  26     int render_frame_id,
  27     const std::string& device_id,
  28     const GURL& document_url,
  29     int sample_rate,
  30     int frames_per_buffer,
  31     PepperAudioInputHost* client) {
  32   scoped_refptr<PepperPlatformAudioInput> audio_input(
  33       new PepperPlatformAudioInput());
  34   if (audio_input->Initialize(render_frame_id,
  35                               device_id,
  36                               document_url,
  37                               sample_rate,
  38                               frames_per_buffer,
  39                               client)) {
  40     // Balanced by Release invoked in
  41     // PepperPlatformAudioInput::ShutDownOnIOThread().
  42     audio_input->AddRef();
  43     return audio_input.get();
  44   }
  45   return NULL;
  46 }
  47
  48 void PepperPlatformAudioInput::StartCapture() {
  49   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
  50
  51   io_message_loop_proxy_->PostTask(
  52       FROM_HERE,
  53       base::Bind(&PepperPlatformAudioInput::StartCaptureOnIOThread, this));
  54 }
  55
  56 void PepperPlatformAudioInput::StopCapture() {
  57   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
  58
  59   io_message_loop_proxy_->PostTask(
  60       FROM_HERE,
  61       base::Bind(&PepperPlatformAudioInput::StopCaptureOnIOThread, this));
  62 }
  63
  64 void PepperPlatformAudioInput::ShutDown() {
  65   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
  66
  67   // Make sure we don't call shutdown more than once.
  68   if (!client_)
  69     return;
  70
  71   // Called on the main thread to stop all audio callbacks. We must only change
  72   // the client on the main thread, and the delegates from the I/O thread.
  73   client_ = NULL;
  74   io_message_loop_proxy_->PostTask(
  75       FROM_HERE,
  76       base::Bind(&PepperPlatformAudioInput::ShutDownOnIOThread, this));
  77 }
  78
  79 void PepperPlatformAudioInput::OnStreamCreated(
  80     base::SharedMemoryHandle handle,
  81     base::SyncSocket::Handle socket_handle,
  82     int length,
  83     int total_segments) {
  84 #if defined(OS_WIN)
  85   DCHECK(handle);
  86   DCHECK(socket_handle);
  87 #else
  88   DCHECK_NE(-1, handle.fd);
  89   DCHECK_NE(-1, socket_handle);
  90 #endif
  91   DCHECK(length);
  92   // TODO(yzshen): Make use of circular buffer scheme. crbug.com/181449.
  93   DCHECK_EQ(1, total_segments);
  94
  95   if (base::MessageLoopProxy::current().get() !=
  96       main_message_loop_proxy_.get()) {
  97     // If shutdown has occurred, |client_| will be NULL and the handles will be
  98     // cleaned up on the main thread.
  99     main_message_loop_proxy_->PostTask(
 100         FROM_HERE,
 101         base::Bind(&PepperPlatformAudioInput::OnStreamCreated,
 102                    this,
 103                    handle,
 104                    socket_handle,
 105                    length,
 106                    total_segments));
 107   } else {
 108     // Must dereference the client only on the main thread. Shutdown may have
 109     // occurred while the request was in-flight, so we need to NULL check.
 110     if (client_) {
 111       client_->StreamCreated(handle, length, socket_handle);
 112     } else {
 113       // Clean up the handles.
 114       base::SyncSocket temp_socket(socket_handle);
 115       base::SharedMemory temp_shared_memory(handle, false);
 116     }
 117   }
 118 }
 119
 120 void PepperPlatformAudioInput::OnVolume(double volume) {}
 121
 122 void PepperPlatformAudioInput::OnStateChanged(
 123     media::AudioInputIPCDelegate::State state) {}
 124
 125 void PepperPlatformAudioInput::OnIPCClosed() { ipc_.reset(); }
 126
 127 PepperPlatformAudioInput::~PepperPlatformAudioInput() {
 128   // Make sure we have been shut down. Warning: this may happen on the I/O
 129   // thread!
 130   // Although these members should be accessed on a specific thread (either the
 131   // main thread or the I/O thread), it should be fine to examine their value
 132   // here.
 133   DCHECK(!ipc_);
 134   DCHECK(!client_);
 135   DCHECK(label_.empty());
 136   DCHECK(!pending_open_device_);
 137 }
 138
 139 PepperPlatformAudioInput::PepperPlatformAudioInput()
 140     : client_(NULL),
 141       main_message_loop_proxy_(base::MessageLoopProxy::current()),
 142       io_message_loop_proxy_(ChildProcess::current()->io_message_loop_proxy()),
 143       render_frame_id_(MSG_ROUTING_NONE),
 144       create_stream_sent_(false),
 145       pending_open_device_(false),
 146       pending_open_device_id_(-1) {}
 147
 148 bool PepperPlatformAudioInput::Initialize(
 149     int render_frame_id,
 150     const std::string& device_id,
 151     const GURL& document_url,
 152     int sample_rate,
 153     int frames_per_buffer,
 154     PepperAudioInputHost* client) {
 155   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 156
 157   RenderFrameImpl* const render_frame =
 158       RenderFrameImpl::FromRoutingID(render_frame_id);
 159   if (!render_frame || !client)
 160     return false;
 161
 162   render_frame_id_ = render_frame_id;
 163   client_ = client;
 164
 165   if (!GetMediaDeviceManager())
 166     return false;
 167
 168   ipc_ = RenderThreadImpl::current()
 169              ->audio_input_message_filter()
 170              ->CreateAudioInputIPC(render_frame->render_view()->GetRoutingID());
 171
 172   params_.Reset(media::AudioParameters::AUDIO_PCM_LINEAR,
 173                 media::CHANNEL_LAYOUT_MONO,
 174                 ppapi::kAudioInputChannels,
 175                 sample_rate,
 176                 ppapi::kBitsPerAudioInputSample,
 177                 frames_per_buffer);
 178
 179   // We need to open the device and obtain the label and session ID before
 180   // initializing.
 181   pending_open_device_id_ = GetMediaDeviceManager()->OpenDevice(
 182       PP_DEVICETYPE_DEV_AUDIOCAPTURE,
 183       device_id.empty() ? media::AudioManagerBase::kDefaultDeviceId : device_id,
 184       document_url,
 185       base::Bind(&PepperPlatformAudioInput::OnDeviceOpened, this));
 186   pending_open_device_ = true;
 187
 188   return true;
 189 }
 190
 191 void PepperPlatformAudioInput::InitializeOnIOThread(int session_id) {
 192   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
 193
 194   if (!ipc_)
 195     return;
 196
 197   // We will be notified by OnStreamCreated().
 198   create_stream_sent_ = true;
 199   ipc_->CreateStream(this, session_id, params_, false, 1);
 200 }
 201
 202 void PepperPlatformAudioInput::StartCaptureOnIOThread() {
 203   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
 204
 205   if (ipc_)
 206     ipc_->RecordStream();
 207 }
 208
 209 void PepperPlatformAudioInput::StopCaptureOnIOThread() {
 210   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
 211
 212   // TODO(yzshen): We cannot re-start capturing if the stream is closed.
 213   if (ipc_ && create_stream_sent_) {
 214     ipc_->CloseStream();
 215   }
 216   ipc_.reset();
 217 }
 218
 219 void PepperPlatformAudioInput::ShutDownOnIOThread() {
 220   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
 221
 222   StopCaptureOnIOThread();
 223
 224   main_message_loop_proxy_->PostTask(
 225       FROM_HERE, base::Bind(&PepperPlatformAudioInput::CloseDevice, this));
 226
 227   Release();  // Release for the delegate, balances out the reference taken in
 228               // PepperPlatformAudioInput::Create.
 229 }
 230
 231 void PepperPlatformAudioInput::OnDeviceOpened(int request_id,
 232                                               bool succeeded,
 233                                               const std::string& label) {
 234   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 235
 236   pending_open_device_ = false;
 237   pending_open_device_id_ = -1;
 238
 239   PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
 240   if (succeeded && device_manager) {
 241     DCHECK(!label.empty());
 242     label_ = label;
 243
 244     if (client_) {
 245       int session_id = device_manager->GetSessionID(
 246           PP_DEVICETYPE_DEV_AUDIOCAPTURE, label);
 247       io_message_loop_proxy_->PostTask(
 248           FROM_HERE,
 249           base::Bind(&PepperPlatformAudioInput::InitializeOnIOThread,
 250                      this,
 251                      session_id));
 252     } else {
 253       // Shutdown has occurred.
 254       CloseDevice();
 255     }
 256   } else {
 257     NotifyStreamCreationFailed();
 258   }
 259 }
 260
 261 void PepperPlatformAudioInput::CloseDevice() {
 262   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 263
 264   if (!label_.empty()) {
 265     PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
 266     if (device_manager)
 267       device_manager->CloseDevice(label_);
 268     label_.clear();
 269   }
 270   if (pending_open_device_) {
 271     PepperMediaDeviceManager* const device_manager = GetMediaDeviceManager();
 272     if (device_manager)
 273       device_manager->CancelOpenDevice(pending_open_device_id_);
 274     pending_open_device_ = false;
 275     pending_open_device_id_ = -1;
 276   }
 277 }
 278
 279 void PepperPlatformAudioInput::NotifyStreamCreationFailed() {
 280   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 281
 282   if (client_)
 283     client_->StreamCreationFailed();
 284 }
 285
 286 PepperMediaDeviceManager* PepperPlatformAudioInput::GetMediaDeviceManager() {
 287   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 288
 289   RenderFrameImpl* const render_frame =
 290       RenderFrameImpl::FromRoutingID(render_frame_id_);
 291   return render_frame ?
 292       PepperMediaDeviceManager::GetForRenderFrame(render_frame).get() : NULL;
 293 }
 294
 295 }  // namespace content