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// Copyright (c) 2010 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/glue/plugins/pepper_audio.h"
#include "base/logging.h"
#include "third_party/ppapi/c/dev/ppb_audio_dev.h"
#include "third_party/ppapi/c/dev/ppb_audio_trusted_dev.h"
namespace pepper {
namespace {
// PPB_AudioConfig functions
PP_Resource CreateStereo16bit(PP_Module module_id, uint32_t sample_rate,
uint32_t sample_frame_count) {
PluginModule* module = PluginModule::FromPPModule(module_id);
if (!module)
return 0;
scoped_refptr<AudioConfig> config(new AudioConfig(module, sample_rate,
sample_frame_count));
return config->GetReference();
}
uint32_t GetSampleRate(PP_Resource config_id) {
scoped_refptr<AudioConfig> config = Resource::GetAs<AudioConfig>(config_id);
return config ? config->sample_rate() : 0;
}
uint32_t GetSampleFrameCount(PP_Resource config_id) {
scoped_refptr<AudioConfig> config = Resource::GetAs<AudioConfig>(config_id);
return config ? config->sample_frame_count() : 0;
}
// PPB_Audio functions
PP_Resource Create(PP_Instance instance_id, PP_Resource config_id,
PPB_Audio_Callback callback, void* user_data) {
PluginInstance* instance = PluginInstance::FromPPInstance(instance_id);
if (!instance)
return 0;
// TODO(neb): Require callback to be present for untrusted plugins.
scoped_refptr<Audio> audio(new Audio(instance->module()));
if (!audio->Init(instance->delegate(), config_id, callback, user_data))
return 0;
return audio->GetReference();
}
PP_Resource GetCurrentConfiguration(PP_Resource audio_id) {
scoped_refptr<Audio> audio = Resource::GetAs<Audio>(audio_id);
return audio ? audio->GetCurrentConfiguration() : 0;
}
bool StartPlayback(PP_Resource audio_id) {
scoped_refptr<Audio> audio = Resource::GetAs<Audio>(audio_id);
return audio ? audio->StartPlayback() : false;
}
bool StopPlayback(PP_Resource audio_id) {
scoped_refptr<Audio> audio = Resource::GetAs<Audio>(audio_id);
return audio ? audio->StopPlayback() : false;
}
// PPB_AudioTrusted functions
PP_Resource GetBuffer(PP_Resource audio_id) {
// TODO(neb): Implement me!
return 0;
}
int GetOSDescriptor(PP_Resource audio_id) {
// TODO(neb): Implement me!
return -1;
}
const PPB_AudioConfig_Dev ppb_audioconfig = {
&CreateStereo16bit,
&GetSampleRate,
&GetSampleFrameCount
};
const PPB_Audio_Dev ppb_audio = {
&Create,
&GetCurrentConfiguration,
&StartPlayback,
&StopPlayback,
};
const PPB_AudioTrusted_Dev ppb_audiotrusted = {
&GetBuffer,
&GetOSDescriptor
};
} // namespace
AudioConfig::AudioConfig(PluginModule* module, int32_t sample_rate,
int32_t sample_frame_count)
: Resource(module),
sample_rate_(sample_rate),
sample_frame_count_(sample_frame_count) {
}
const PPB_AudioConfig_Dev* AudioConfig::GetInterface() {
return &ppb_audioconfig;
}
AudioConfig* AudioConfig::AsAudioConfig() {
return this;
}
Audio::Audio(PluginModule* module)
: Resource(module),
socket_(NULL),
shared_memory_(NULL),
shared_memory_size_(0),
callback_(NULL),
user_data_(NULL) {
}
Audio::~Audio() {
// Calling ShutDown() makes sure StreamCreated cannot be called anymore.
audio_->ShutDown();
// Closing the socket causes the thread to exit - wait for it.
socket_->Close();
if (audio_thread_.get()) {
audio_thread_->Join();
audio_thread_.reset();
}
// Shared memory destructor will unmap the memory automatically.
}
const PPB_Audio_Dev* Audio::GetInterface() {
return &ppb_audio;
}
const PPB_AudioTrusted_Dev* Audio::GetTrustedInterface() {
return &ppb_audiotrusted;
}
Audio* Audio::AsAudio() {
return this;
}
bool Audio::Init(PluginDelegate* plugin_delegate, PP_Resource config_id,
PPB_Audio_Callback callback, void* user_data) {
CHECK(!audio_.get());
config_ = Resource::GetAs<AudioConfig>(config_id);
if (!config_)
return false;
callback_ = callback;
user_data_ = user_data;
// When the stream is created, we'll get called back in StreamCreated().
audio_.reset(plugin_delegate->CreateAudio(config_->sample_rate(),
config_->sample_frame_count(),
this));
return audio_.get() != NULL;
}
void Audio::StreamCreated(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_) {
shared_memory_->Map(shared_memory_size_);
audio_thread_.reset(new base::DelegateSimpleThread(this,
"plugin_audio_thread"));
audio_thread_->Start();
}
}
void Audio::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, user_data_);
}
}
} // namespace pepper
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