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// 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 "webkit/plugins/ppapi/ppb_audio_impl.h"
#include "base/logging.h"
#include "media/audio/audio_output_controller.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/ppb_audio.h"
#include "ppapi/c/ppb_audio_config.h"
#include "ppapi/shared_impl/resource_tracker.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"
using ppapi::PpapiGlobals;
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_Audio_API;
using ppapi::thunk::PPB_AudioConfig_API;
using ppapi::TrackedCallback;
namespace webkit {
namespace ppapi {
// PPB_Audio_Impl --------------------------------------------------------------
PPB_Audio_Impl::PPB_Audio_Impl(PP_Instance instance)
: Resource(::ppapi::OBJECT_IS_IMPL, instance),
audio_(NULL),
sample_frame_count_(0) {
}
PPB_Audio_Impl::~PPB_Audio_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_) {
audio_->ShutDown();
audio_ = NULL;
}
}
// static
PP_Resource PPB_Audio_Impl::Create(PP_Instance instance,
PP_Resource config,
PPB_Audio_Callback audio_callback,
void* user_data) {
scoped_refptr<PPB_Audio_Impl> audio(new PPB_Audio_Impl(instance));
if (!audio->Init(config, audio_callback, user_data))
return 0;
return audio->GetReference();
}
PPB_Audio_API* PPB_Audio_Impl::AsPPB_Audio_API() {
return this;
}
bool PPB_Audio_Impl::Init(PP_Resource config,
PPB_Audio_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_);
audio_ = plugin_delegate->CreateAudioOutput(
enter.object()->GetSampleRate(), enter.object()->GetSampleFrameCount(),
this);
sample_frame_count_ = enter.object()->GetSampleFrameCount();
return audio_ != NULL;
}
PP_Resource PPB_Audio_Impl::GetCurrentConfig() {
// AddRef on behalf of caller, while keeping a ref for ourselves.
PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(config_);
return config_;
}
PP_Bool PPB_Audio_Impl::StartPlayback() {
if (!audio_)
return PP_FALSE;
if (playing())
return PP_TRUE;
SetStartPlaybackState();
return BoolToPPBool(audio_->StartPlayback());
}
PP_Bool PPB_Audio_Impl::StopPlayback() {
if (!audio_)
return PP_FALSE;
if (!playing())
return PP_TRUE;
if (!audio_->StopPlayback())
return PP_FALSE;
SetStopPlaybackState();
return PP_TRUE;
}
int32_t PPB_Audio_Impl::Open(
PP_Resource config,
scoped_refptr<TrackedCallback> 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_);
audio_ = plugin_delegate->CreateAudioOutput(
enter.object()->GetSampleRate(), enter.object()->GetSampleFrameCount(),
this);
if (!audio_)
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.
SetCreateCallback(create_callback);
return PP_OK_COMPLETIONPENDING;
}
int32_t PPB_Audio_Impl::GetSyncSocket(int* sync_socket) {
return GetSyncSocketImpl(sync_socket);
}
int32_t PPB_Audio_Impl::GetSharedMemory(int* shm_handle,
uint32_t* shm_size) {
return GetSharedMemoryImpl(shm_handle, shm_size);
}
void PPB_Audio_Impl::OnSetStreamInfo(
base::SharedMemoryHandle shared_memory_handle,
size_t shared_memory_size,
base::SyncSocket::Handle socket_handle) {
SetStreamInfo(pp_instance(), shared_memory_handle, shared_memory_size,
socket_handle, sample_frame_count_);
}
} // namespace ppapi
} // namespace webkit
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