PPB_AudioInput_Dev: support multiple audio input devices - Part 1.

ppapi/shared_impl/ppb_audio_input_shared.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 "ppapi/shared_impl/ppb_audio_input_shared.h"
 
 #include "base/logging.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
+#include "ppapi/shared_impl/ppb_device_ref_shared.h"
+#include "ppapi/shared_impl/resource_tracker.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_audio_config_api.h"
 
 namespace ppapi {
 
-PPB_AudioInput_Shared::PPB_AudioInput_Shared()
-    : capturing_(false),
+namespace {
+
+void IgnoredCompletionCallback(void* user_data, int32_t result) {
+  // Do nothing.
+}
+
+}  // namespace
+
+PPB_AudioInput_Shared::PPB_AudioInput_Shared(const HostResource& audio_input)
+    : Resource(OBJECT_IS_PROXY, audio_input),
+      open_state_(BEFORE_OPEN),
+      capturing_(false),
       shared_memory_size_(0),
-      callback_(NULL),
-      user_data_(NULL) {
+      audio_input_callback_(NULL),
+      user_data_(NULL),
+      devices_(NULL),
+      resource_object_type_(OBJECT_IS_PROXY) {
+}
+
+PPB_AudioInput_Shared::PPB_AudioInput_Shared(PP_Instance instance)
+    : Resource(OBJECT_IS_IMPL, instance),
+      open_state_(BEFORE_OPEN),
+      capturing_(false),
+      shared_memory_size_(0),
+      audio_input_callback_(NULL),
+      user_data_(NULL),
+      devices_(NULL),
+      resource_object_type_(OBJECT_IS_IMPL) {
 }
 
 PPB_AudioInput_Shared::~PPB_AudioInput_Shared() {
+  DCHECK(open_state_ == CLOSED);
+}
+
+thunk::PPB_AudioInput_API* PPB_AudioInput_Shared::AsPPB_AudioInput_API() {
+  return this;
+}
+
+int32_t PPB_AudioInput_Shared::EnumerateDevices(
+    PP_Resource* devices,
+    PP_CompletionCallback callback) {
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+  if (TrackedCallback::IsPending(enumerate_devices_callback_))
+    return PP_ERROR_INPROGRESS;
+
+  return InternalEnumerateDevices(devices, callback);
+}
+
+int32_t PPB_AudioInput_Shared::Open(
+    const std::string& device_id,
+    PP_Resource config,
+    PPB_AudioInput_Callback audio_input_callback,
+    void* user_data,
+    PP_CompletionCallback callback) {
+  if (!audio_input_callback)
+    return PP_ERROR_BADARGUMENT;
+
+  return CommonOpen(device_id, config, audio_input_callback, user_data,
+                    callback);
+}
+
+PP_Resource PPB_AudioInput_Shared::GetCurrentConfig() {
+  // AddRef for the caller.
+  if (config_.get())
+    PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(config_);
+  return config_;
+}
+
+PP_Bool PPB_AudioInput_Shared::StartCapture() {
+  if (open_state_ == CLOSED || (open_state_ == BEFORE_OPEN &&
+                                !TrackedCallback::IsPending(open_callback_))) {
+    return PP_FALSE;
+  }
+  if (capturing_)
+    return PP_TRUE;
+
+  return InternalStartCapture();
+}
+
+PP_Bool PPB_AudioInput_Shared::StopCapture() {
+  if (open_state_ == CLOSED || (open_state_ == BEFORE_OPEN &&
+                                !TrackedCallback::IsPending(open_callback_))) {
+    return PP_FALSE;
+  }
+  if (!capturing_)
+    return PP_TRUE;
+
+  return InternalStopCapture();
+}
+
+void PPB_AudioInput_Shared::Close() {
+  if (open_state_ == CLOSED)
+    return;
+
+  open_state_ = CLOSED;
+  InternalClose();
+
   // Closing the socket causes the thread to exit - wait for it.
   if (socket_.get())
     socket_->Close();
   if (audio_input_thread_.get()) {
     audio_input_thread_->Join();
     audio_input_thread_.reset();
   }
+
+  if (TrackedCallback::IsPending(open_callback_))
+    open_callback_->PostAbort();
 }
 
-void PPB_AudioInput_Shared::SetCallback(PPB_AudioInput_Callback callback,
-                                        void* user_data) {
-  callback_ = callback;
-  user_data_ = user_data;
+void PPB_AudioInput_Shared::OnEnumerateDevicesComplete(
+    int32_t result,
+    const std::vector<DeviceRefData>& devices) {
+  DCHECK(TrackedCallback::IsPending(enumerate_devices_callback_));
+
+  if (result == PP_OK && devices_) {
+    *devices_ = PPB_DeviceRef_Shared::CreateResourceArray(
+        resource_object_type_, pp_instance(), devices);
+  }
+  devices_ = NULL;
+
+  TrackedCallback::ClearAndRun(&enumerate_devices_callback_, result);
+}
+
+void PPB_AudioInput_Shared::OnOpenComplete(
+    int32_t result,
+    base::SharedMemoryHandle shared_memory_handle,
+    size_t shared_memory_size,
+    base::SyncSocket::Handle socket_handle) {
+  if (open_state_ == BEFORE_OPEN && result == PP_OK) {
+    open_state_ = OPENED;
+    SetStreamInfo(shared_memory_handle, shared_memory_size, socket_handle);
+  } else {
+    // Clean up the handles.
+    base::SyncSocket temp_socket(socket_handle);
+    base::SharedMemory temp_mem(shared_memory_handle, false);
+  }
+
+  // The callback may have been aborted by Close().
+  if (TrackedCallback::IsPending(open_callback_))
+    TrackedCallback::ClearAndRun(&open_callback_, result);
+}
+
+// static
+PP_CompletionCallback PPB_AudioInput_Shared::MakeIgnoredCompletionCallback() {
+  return PP_MakeCompletionCallback(&IgnoredCompletionCallback, NULL);
 }
 
 void PPB_AudioInput_Shared::SetStartCaptureState() {
   DCHECK(!capturing_);
   DCHECK(!audio_input_thread_.get());
 
   // If the socket doesn't exist, that means that the plugin has started before
   // the browser has had a chance to create all the shared memory info and
-  // notify us. This is a common case. In this case, we just set the playing_
+  // notify us. This is a common case. In this case, we just set the capturing_
   // flag and the capture will automatically start when that data is available
   // in SetStreamInfo.
-  if (socket_.get())
+  if (audio_input_callback_ && socket_.get())
     StartThread();
   capturing_ = true;
 }
 
 void PPB_AudioInput_Shared::SetStopCaptureState() {
   DCHECK(capturing_);
 
   if (audio_input_thread_.get()) {
     audio_input_thread_->Join();
     audio_input_thread_.reset();
   }
   capturing_ = false;
 }
 
 void PPB_AudioInput_Shared::SetStreamInfo(
     base::SharedMemoryHandle shared_memory_handle,
     size_t shared_memory_size,
     base::SyncSocket::Handle socket_handle) {
   socket_.reset(new base::SyncSocket(socket_handle));
   shared_memory_.reset(new base::SharedMemory(shared_memory_handle, false));
   shared_memory_size_ = shared_memory_size;
 
-  if (callback_) {
+  if (audio_input_callback_) {
     shared_memory_->Map(shared_memory_size_);
 
-    // In common case StartCapture() was called before StreamCreated().
+    // StartCapture() may be called before SetSreamInfo().
     if (capturing_)
       StartThread();
   }
 }
 
 void PPB_AudioInput_Shared::StartThread() {
-  DCHECK(callback_);
+  DCHECK(audio_input_callback_);
   DCHECK(!audio_input_thread_.get());
   audio_input_thread_.reset(new base::DelegateSimpleThread(
       this, "plugin_audio_input_thread"));
   audio_input_thread_->Start();
 }
 
 void PPB_AudioInput_Shared::Run() {
   int pending_data;
   void* buffer = shared_memory_->memory();
 
   while (sizeof(pending_data) == socket_->Receive(&pending_data,
                                                   sizeof(pending_data)) &&
          pending_data >= 0) {
-    callback_(buffer, shared_memory_size_, user_data_);
+    audio_input_callback_(buffer, shared_memory_size_, user_data_);
   }
 }
 
+int32_t PPB_AudioInput_Shared::CommonOpen(
+    const std::string& device_id,
+    PP_Resource config,
+    PPB_AudioInput_Callback audio_input_callback,
+    void* user_data,
+    PP_CompletionCallback callback) {
+  if (open_state_ != BEFORE_OPEN)
+    return PP_ERROR_FAILED;
+
+  thunk::EnterResourceNoLock<thunk::PPB_AudioConfig_API> enter_config(config,
+                                                                      true);
+  if (enter_config.failed())
+    return PP_ERROR_BADARGUMENT;
+
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+
+  if (TrackedCallback::IsPending(open_callback_))
+    return PP_ERROR_INPROGRESS;
+
+  config_ = config;
+  audio_input_callback_ = audio_input_callback;
+  user_data_ = user_data;
+
+  return InternalOpen(device_id, enter_config.object()->GetSampleRate(),
+                      enter_config.object()->GetSampleFrameCount(), callback);
+}
+
 }  // namespace ppapi