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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 "content/renderer/pepper/ppb_audio_impl.h"
#include "base/logging.h"
#include "content/renderer/pepper/pepper_audio_controller.h"
#include "content/renderer/pepper/pepper_platform_audio_output.h"
#include "content/renderer/pepper/pepper_plugin_instance_impl.h"
#include "content/renderer/pepper/plugin_instance_throttler_impl.h"
#include "content/renderer/render_frame_impl.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"
using ppapi::PpapiGlobals;
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_Audio_API;
using ppapi::thunk::PPB_AudioConfig_API;
using ppapi::TrackedCallback;
namespace content {
// PPB_Audio_Impl --------------------------------------------------------------
PPB_Audio_Impl::PPB_Audio_Impl(PP_Instance instance)
: Resource(ppapi::OBJECT_IS_IMPL, instance),
audio_(nullptr),
playback_throttled_(false) {
PepperPluginInstanceImpl* plugin_instance =
static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (plugin_instance && plugin_instance->throttler()) {
plugin_instance->throttler()->AddObserver(this);
}
}
PPB_Audio_Impl::~PPB_Audio_Impl() {
PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (instance) {
if (instance->throttler()) {
instance->throttler()->RemoveObserver(this);
}
instance->audio_controller().RemoveInstance(this);
}
// 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_ = nullptr;
}
}
PPB_Audio_API* PPB_Audio_Impl::AsPPB_Audio_API() { return this; }
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;
// If plugin is in power saver mode, defer audio IPC communication.
PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (instance && instance->throttler() &&
instance->throttler()->power_saver_enabled()) {
instance->throttler()->NotifyAudioThrottled();
playback_throttled_ = true;
return PP_TRUE;
}
if (instance)
instance->audio_controller().AddInstance(this);
SetStartPlaybackState();
return PP_FromBool(audio_->StartPlayback());
}
PP_Bool PPB_Audio_Impl::StopPlayback() {
if (!audio_)
return PP_FALSE;
if (playback_throttled_) {
// If a start playback request is still deferred, we must fulfill it first
// to shut down the audio thread correctly.
StartDeferredPlayback();
}
PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (instance)
instance->audio_controller().RemoveInstance(this);
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;
PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (!instance)
return PP_ERROR_FAILED;
// When the stream is created, we'll get called back on StreamCreated().
DCHECK(!audio_);
audio_ = PepperPlatformAudioOutput::Create(
static_cast<int>(enter.object()->GetSampleRate()),
static_cast<int>(enter.object()->GetSampleFrameCount()),
instance->render_frame()->GetRoutingID(),
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(base::SharedMemory** shm,
uint32_t* shm_size) {
return GetSharedMemoryImpl(shm, shm_size);
}
void PPB_Audio_Impl::OnSetStreamInfo(
base::SharedMemoryHandle shared_memory_handle,
size_t shared_memory_size,
base::SyncSocket::Handle socket_handle) {
EnterResourceNoLock<PPB_AudioConfig_API> enter(config_, true);
SetStreamInfo(pp_instance(),
shared_memory_handle,
shared_memory_size,
socket_handle,
enter.object()->GetSampleRate(),
enter.object()->GetSampleFrameCount());
}
void PPB_Audio_Impl::OnThrottleStateChange() {
PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (playback_throttled_ && instance && instance->throttler() &&
!instance->throttler()->power_saver_enabled()) {
// If we have become unthrottled, and we have a pending playback, start it.
StartDeferredPlayback();
}
}
void PPB_Audio_Impl::StartDeferredPlayback() {
DCHECK(playback_throttled_);
playback_throttled_ = false;
PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
PepperPluginInstance::Get(pp_instance()));
if (instance)
instance->audio_controller().AddInstance(this);
SetStartPlaybackState();
audio_->StartPlayback();
}
void PPB_Audio_Impl::SetVolume(double volume) {
if (audio_)
audio_->SetVolume(volume);
}
} // namespace content
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