Implementation of ppapi audio.

webkit/plugins/ppapi/ppb_audio_input_impl.cc

+// Copyright (c) 2011 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 "base/logging.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/dev/ppb_audio_input_dev.h"
+#include "ppapi/shared_impl/resource_tracker.h"
+#include "ppapi/shared_impl/tracker_base.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_audio_config_api.h"
+#include "ppapi/thunk/thunk.h"
+#include "webkit/plugins/ppapi/common.h"
+#include "webkit/plugins/ppapi/resource_helper.h"
+#include "webkit/plugins/ppapi/ppb_audio_input_impl.h"
+
+using ppapi::thunk::EnterResourceNoLock;
+using ppapi::thunk::PPB_AudioInput_API;
+using ppapi::thunk::PPB_AudioConfig_API;
+
+namespace webkit {
+namespace ppapi {
+
+// PPB_AudioInput_Impl ---------------------------------------------------------
+
+PPB_AudioInput_Impl::PPB_AudioInput_Impl(PP_Instance instance)
+    : Resource(instance),
+      audio_input_(NULL) {
+}
+
+PPB_AudioInput_Impl::~PPB_AudioInput_Impl() {
+  // Calling ShutDown() makes sure StreamCreated cannot be called anymore and
+  // releases the audio data associated with the pointer. Note however, that
+  // until ShutDown returns, StreamCreated may still be called. This will be
+  // OK since we'll just immediately clean up the data it stored later in this
+  // destructor.
+  if (audio_input_) {
+    audio_input_->ShutDown();
+    audio_input_ = NULL;
+  }
+}
+
+// static
+PP_Resource PPB_AudioInput_Impl::Create(PP_Instance instance,
+                                   PP_Resource config,
+                                   PPB_AudioInput_Callback audio_input_callback,
+                                   void* user_data) {
+  scoped_refptr<PPB_AudioInput_Impl>
+    audio_input(new PPB_AudioInput_Impl(instance));
+  if (!audio_input->Init(config, audio_input_callback, user_data))
+    return 0;
+  return audio_input->GetReference();
+}
+
+PPB_AudioInput_API* PPB_AudioInput_Impl::AsPPB_AudioInput_API() {
+  return this;
+}
+
+bool PPB_AudioInput_Impl::Init(PP_Resource config,
+                               PPB_AudioInput_Callback callback,
+                               void* user_data) {
+  // Validate the config and keep a reference to it.
+  EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
+  if (enter.failed())
+    return false;
+  config_ = config;
+
+  if (!callback)
+    return false;
+  SetCallback(callback, user_data);
+
+  PluginDelegate* plugin_delegate = ResourceHelper::GetPluginDelegate(this);
+  if (!plugin_delegate)
+    return false;
+
+  // When the stream is created, we'll get called back on StreamCreated().
+  CHECK(!audio_input_);
+  audio_input_ = plugin_delegate->CreateAudioInput(
+      enter.object()->GetSampleRate(),
+      enter.object()->GetSampleFrameCount(),
+      this);
+  return audio_input_ != NULL;
+}
+
+PP_Resource PPB_AudioInput_Impl::GetCurrentConfig() {
+  // AddRef on behalf of caller, while keeping a ref for ourselves.
+  ::ppapi::TrackerBase::Get()->GetResourceTracker()->AddRefResource(config_);
+  return config_;
+}
+
+PP_Bool PPB_AudioInput_Impl::StartCapture() {
+  if (!audio_input_)
+    return PP_FALSE;
+  if (capturing())
+    return PP_TRUE;
+  SetStartCaptureState();
+  return BoolToPPBool(audio_input_->StartCapture());
+}
+
+PP_Bool PPB_AudioInput_Impl::StopCapture() {
+  if (!audio_input_)
+    return PP_FALSE;
+  if (!capturing())
+    return PP_TRUE;
+  if (!audio_input_->StopCapture())
+    return PP_FALSE;
+  SetStopCaptureState();
+  return PP_TRUE;
+}
+
+int32_t PPB_AudioInput_Impl::OpenTrusted(PP_Resource config,
+    PP_CompletionCallback create_callback) {
+  // Validate the config and keep a reference to it.
+  EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
+  if (enter.failed())
+    return PP_ERROR_FAILED;
+  config_ = config;
+
+  PluginDelegate* plugin_delegate = ResourceHelper::GetPluginDelegate(this);
+  if (!plugin_delegate)
+    return PP_ERROR_FAILED;
+
+  // When the stream is created, we'll get called back on StreamCreated().
+  DCHECK(!audio_input_);
+  audio_input_ = plugin_delegate->CreateAudioInput(
+      enter.object()->GetSampleRate(),
+      enter.object()->GetSampleFrameCount(),
+      this);
+
+  if (!audio_input_)
+    return PP_ERROR_FAILED;
+
+  // At this point, we are guaranteeing ownership of the completion
+  // callback.  Audio promises to fire the completion callback
+  // once and only once.
+  SetCallbackInfo(true, create_callback);
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t PPB_AudioInput_Impl::GetSyncSocket(int* sync_socket) {
+    return AudioHelper::GetSyncSocket(sync_socket);
+}
+
+int32_t PPB_AudioInput_Impl::GetSharedMemory(int* shm_handle,
+                                             uint32_t* shm_size) {
+    return AudioHelper::GetSharedMemory(shm_handle, shm_size);
+}
+
+void PPB_AudioInput_Impl::OnSetStreamInfo(
+        base::SharedMemoryHandle shared_memory_handle,
+        size_t shared_memory_size,
+        base::SyncSocket::Handle socket_handle) {
+    SetStreamInfo(shared_memory_handle, shared_memory_size, socket_handle);
+}
+
+void PPB_AudioInput_Impl::StreamCreated(
+        base::SharedMemoryHandle shared_memory_handle,
+        size_t shared_memory_size,
+        base::SyncSocket::Handle socket_handle) {
+    StreamCreated_(shared_memory_handle, shared_memory_size, socket_handle);
+}
+
+}  // namespace ppapi
+}  // namespace webkit