ppapi/proxy/audio_input_resource.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 "ppapi/proxy/audio_input_resource.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "ipc/ipc_platform_file.h"
  10 #include "media/audio/audio_parameters.h"
  11 #include "ppapi/c/pp_errors.h"
  12 #include "ppapi/proxy/ppapi_messages.h"
  13 #include "ppapi/proxy/resource_message_params.h"
  14 #include "ppapi/proxy/serialized_handle.h"
  15 #include "ppapi/shared_impl/ppapi_globals.h"
  16 #include "ppapi/shared_impl/ppb_audio_config_shared.h"
  17 #include "ppapi/shared_impl/resource_tracker.h"
  18 #include "ppapi/shared_impl/tracked_callback.h"
  19 #include "ppapi/thunk/enter.h"
  20 #include "ppapi/thunk/ppb_audio_config_api.h"
  21
  22 namespace ppapi {
  23 namespace proxy {
  24
  25 AudioInputResource::AudioInputResource(
  26     Connection connection,
  27     PP_Instance instance)
  28     : PluginResource(connection, instance),
  29       open_state_(BEFORE_OPEN),
  30       capturing_(false),
  31       shared_memory_size_(0),
  32       audio_input_callback_0_3_(NULL),
  33       audio_input_callback_(NULL),
  34       user_data_(NULL),
  35       enumeration_helper_(this),
  36       bytes_per_second_(0) {
  37   SendCreate(RENDERER, PpapiHostMsg_AudioInput_Create());
  38 }
  39
  40 AudioInputResource::~AudioInputResource() {
  41   Close();
  42 }
  43
  44 thunk::PPB_AudioInput_API* AudioInputResource::AsPPB_AudioInput_API() {
  45   return this;
  46 }
  47
  48 void AudioInputResource::OnReplyReceived(
  49     const ResourceMessageReplyParams& params,
  50     const IPC::Message& msg) {
  51   if (!enumeration_helper_.HandleReply(params, msg))
  52     PluginResource::OnReplyReceived(params, msg);
  53 }
  54
  55 int32_t AudioInputResource::EnumerateDevices(
  56     const PP_ArrayOutput& output,
  57     scoped_refptr<TrackedCallback> callback) {
  58   return enumeration_helper_.EnumerateDevices(output, callback);
  59 }
  60
  61 int32_t AudioInputResource::MonitorDeviceChange(
  62     PP_MonitorDeviceChangeCallback callback,
  63     void* user_data) {
  64   return enumeration_helper_.MonitorDeviceChange(callback, user_data);
  65 }
  66
  67 int32_t AudioInputResource::Open0_3(
  68     PP_Resource device_ref,
  69     PP_Resource config,
  70     PPB_AudioInput_Callback_0_3 audio_input_callback_0_3,
  71     void* user_data,
  72     scoped_refptr<TrackedCallback> callback) {
  73   return CommonOpen(device_ref, config, audio_input_callback_0_3, NULL,
  74                     user_data, callback);
  75 }
  76
  77 int32_t AudioInputResource::Open(PP_Resource device_ref,
  78                                  PP_Resource config,
  79                                  PPB_AudioInput_Callback audio_input_callback,
  80                                  void* user_data,
  81                                  scoped_refptr<TrackedCallback> callback) {
  82   return CommonOpen(device_ref, config, NULL, audio_input_callback, user_data,
  83                     callback);
  84 }
  85
  86 PP_Resource AudioInputResource::GetCurrentConfig() {
  87   // AddRef for the caller.
  88   if (config_.get())
  89     PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(config_);
  90   return config_;
  91 }
  92
  93 PP_Bool AudioInputResource::StartCapture() {
  94   if (open_state_ == CLOSED || (open_state_ == BEFORE_OPEN &&
  95                                 !TrackedCallback::IsPending(open_callback_))) {
  96     return PP_FALSE;
  97   }
  98   if (capturing_)
  99     return PP_TRUE;
 100
 101   capturing_ = true;
 102   // Return directly if the audio input device hasn't been opened. Capturing
 103   // will be started once the open operation is completed.
 104   if (open_state_ == BEFORE_OPEN)
 105     return PP_TRUE;
 106
 107   StartThread();
 108
 109   Post(RENDERER, PpapiHostMsg_AudioInput_StartOrStop(true));
 110   return PP_TRUE;
 111 }
 112
 113 PP_Bool AudioInputResource::StopCapture() {
 114   if (open_state_ == CLOSED)
 115     return PP_FALSE;
 116   if (!capturing_)
 117     return PP_TRUE;
 118
 119   // If the audio input device hasn't been opened, set |capturing_| to false and
 120   // return directly.
 121   if (open_state_ == BEFORE_OPEN) {
 122     capturing_ = false;
 123     return PP_TRUE;
 124   }
 125
 126   Post(RENDERER, PpapiHostMsg_AudioInput_StartOrStop(false));
 127
 128   StopThread();
 129   capturing_ = false;
 130
 131   return PP_TRUE;
 132 }
 133
 134 void AudioInputResource::Close() {
 135   if (open_state_ == CLOSED)
 136     return;
 137
 138   open_state_ = CLOSED;
 139   Post(RENDERER, PpapiHostMsg_AudioInput_Close());
 140   StopThread();
 141
 142   if (TrackedCallback::IsPending(open_callback_))
 143     open_callback_->PostAbort();
 144 }
 145
 146 void AudioInputResource::LastPluginRefWasDeleted() {
 147   enumeration_helper_.LastPluginRefWasDeleted();
 148 }
 149
 150 void AudioInputResource::OnPluginMsgOpenReply(
 151     const ResourceMessageReplyParams& params) {
 152   if (open_state_ == BEFORE_OPEN && params.result() == PP_OK) {
 153     IPC::PlatformFileForTransit socket_handle_for_transit =
 154         IPC::InvalidPlatformFileForTransit();
 155     params.TakeSocketHandleAtIndex(0, &socket_handle_for_transit);
 156     base::SyncSocket::Handle socket_handle =
 157         IPC::PlatformFileForTransitToPlatformFile(socket_handle_for_transit);
 158     CHECK(socket_handle != base::SyncSocket::kInvalidHandle);
 159
 160     SerializedHandle serialized_shared_memory_handle =
 161         params.TakeHandleOfTypeAtIndex(1, SerializedHandle::SHARED_MEMORY);
 162     CHECK(serialized_shared_memory_handle.IsHandleValid());
 163
 164     open_state_ = OPENED;
 165     SetStreamInfo(serialized_shared_memory_handle.shmem(),
 166                   serialized_shared_memory_handle.size(),
 167                   socket_handle);
 168   } else {
 169     capturing_ = false;
 170   }
 171
 172   // The callback may have been aborted by Close().
 173   if (TrackedCallback::IsPending(open_callback_))
 174     open_callback_->Run(params.result());
 175 }
 176
 177 void AudioInputResource::SetStreamInfo(
 178     base::SharedMemoryHandle shared_memory_handle,
 179     size_t shared_memory_size,
 180     base::SyncSocket::Handle socket_handle) {
 181   socket_.reset(new base::CancelableSyncSocket(socket_handle));
 182   shared_memory_.reset(new base::SharedMemory(shared_memory_handle, false));
 183   shared_memory_size_ = shared_memory_size;
 184
 185   if (!shared_memory_->Map(shared_memory_size_)) {
 186     PpapiGlobals::Get()->LogWithSource(
 187         pp_instance(),
 188         PP_LOGLEVEL_WARNING,
 189         std::string(),
 190         "Failed to map shared memory for PPB_AudioInput_Shared.");
 191   }
 192
 193   // There is a pending capture request before SetStreamInfo().
 194   if (capturing_) {
 195     // Set |capturing_| to false so that the state looks consistent to
 196     // StartCapture(), which will reset it to true.
 197     capturing_ = false;
 198     StartCapture();
 199   }
 200 }
 201
 202 void AudioInputResource::StartThread() {
 203   // Don't start the thread unless all our state is set up correctly.
 204   if ((!audio_input_callback_0_3_ && !audio_input_callback_) ||
 205       !socket_.get() || !capturing_ || !shared_memory_->memory()) {
 206     return;
 207   }
 208   DCHECK(!audio_input_thread_.get());
 209   audio_input_thread_.reset(new base::DelegateSimpleThread(
 210       this, "plugin_audio_input_thread"));
 211   audio_input_thread_->Start();
 212 }
 213
 214 void AudioInputResource::StopThread() {
 215   // Shut down the socket to escape any hanging |Receive|s.
 216   if (socket_.get())
 217     socket_->Shutdown();
 218   if (audio_input_thread_.get()) {
 219     audio_input_thread_->Join();
 220     audio_input_thread_.reset();
 221   }
 222 }
 223
 224 void AudioInputResource::Run() {
 225   // The shared memory represents AudioInputBufferParameters and the actual data
 226   // buffer.
 227   media::AudioInputBuffer* buffer =
 228       static_cast<media::AudioInputBuffer*>(shared_memory_->memory());
 229   uint32_t data_buffer_size =
 230       shared_memory_size_ - sizeof(media::AudioInputBufferParameters);
 231   int pending_data;
 232
 233   while (sizeof(pending_data) == socket_->Receive(&pending_data,
 234                                                   sizeof(pending_data)) &&
 235          pending_data >= 0) {
 236     // While closing the stream, we may receive buffers whose size is different
 237     // from |data_buffer_size|.
 238     CHECK_LE(buffer->params.size, data_buffer_size);
 239     if (buffer->params.size > 0) {
 240       if (audio_input_callback_) {
 241         PP_TimeDelta latency =
 242             static_cast<double>(pending_data) / bytes_per_second_;
 243         audio_input_callback_(&buffer->audio[0], buffer->params.size, latency,
 244                               user_data_);
 245       } else {
 246         audio_input_callback_0_3_(&buffer->audio[0], buffer->params.size,
 247                                   user_data_);
 248       }
 249     }
 250   }
 251 }
 252
 253 int32_t AudioInputResource::CommonOpen(
 254     PP_Resource device_ref,
 255     PP_Resource config,
 256     PPB_AudioInput_Callback_0_3 audio_input_callback_0_3,
 257     PPB_AudioInput_Callback audio_input_callback,
 258     void* user_data,
 259     scoped_refptr<TrackedCallback> callback) {
 260   std::string device_id;
 261   // |device_id| remains empty if |device_ref| is 0, which means the default
 262   // device.
 263   if (device_ref != 0) {
 264     thunk::EnterResourceNoLock<thunk::PPB_DeviceRef_API> enter_device_ref(
 265         device_ref, true);
 266     if (enter_device_ref.failed())
 267       return PP_ERROR_BADRESOURCE;
 268     device_id = enter_device_ref.object()->GetDeviceRefData().id;
 269   }
 270
 271   if (TrackedCallback::IsPending(open_callback_))
 272     return PP_ERROR_INPROGRESS;
 273   if (open_state_ != BEFORE_OPEN)
 274     return PP_ERROR_FAILED;
 275
 276   if (!audio_input_callback_0_3 && !audio_input_callback)
 277     return PP_ERROR_BADARGUMENT;
 278   thunk::EnterResourceNoLock<thunk::PPB_AudioConfig_API> enter_config(config,
 279                                                                       true);
 280   if (enter_config.failed())
 281     return PP_ERROR_BADARGUMENT;
 282
 283   config_ = config;
 284   audio_input_callback_0_3_ = audio_input_callback_0_3;
 285   audio_input_callback_ = audio_input_callback;
 286   user_data_ = user_data;
 287   open_callback_ = callback;
 288   bytes_per_second_ = kAudioInputChannels * (kBitsPerAudioInputSample / 8) *
 289                       enter_config.object()->GetSampleRate();
 290
 291   PpapiHostMsg_AudioInput_Open msg(
 292       device_id, enter_config.object()->GetSampleRate(),
 293       enter_config.object()->GetSampleFrameCount());
 294   Call<PpapiPluginMsg_AudioInput_OpenReply>(
 295       RENDERER, msg,
 296       base::Bind(&AudioInputResource::OnPluginMsgOpenReply,
 297                  base::Unretained(this)));
 298   return PP_OK_COMPLETIONPENDING;
 299 }
 300 }  // namespace proxy
 301 }  // namespace ppapi