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// 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 "webkit/plugins/ppapi/ppb_audio_impl.h"
#include "base/logging.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/ppb_audio.h"
#include "ppapi/c/ppb_audio_config.h"
#include "ppapi/c/trusted/ppb_audio_trusted.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"
namespace webkit {
namespace ppapi {
// PPB_AudioConfig -------------------------------------------------------------
PPB_AudioConfig_Impl::PPB_AudioConfig_Impl(PluginInstance* instance)
: Resource(instance) {
}
PPB_AudioConfig_Impl::~PPB_AudioConfig_Impl() {
}
::ppapi::thunk::PPB_AudioConfig_API*
PPB_AudioConfig_Impl::AsPPB_AudioConfig_API() {
return this;
}
// PPB_Audio_Impl --------------------------------------------------------------
PPB_Audio_Impl::PPB_Audio_Impl(PluginInstance* instance)
: Resource(instance),
config_id_(0),
audio_(NULL),
create_callback_pending_(false) {
create_callback_ = PP_MakeCompletionCallback(NULL, NULL);
}
PPB_Audio_Impl::~PPB_Audio_Impl() {
if (config_id_)
ResourceTracker::Get()->UnrefResource(config_id_);
// 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;
}
// If the completion callback hasn't fired yet, do so here
// with an error condition.
if (create_callback_pending_) {
PP_RunCompletionCallback(&create_callback_, PP_ERROR_ABORTED);
create_callback_pending_ = false;
}
}
::ppapi::thunk::PPB_Audio_API* PPB_Audio_Impl::AsPPB_Audio_API() {
return this;
}
::ppapi::thunk::PPB_AudioTrusted_API* PPB_Audio_Impl::AsPPB_AudioTrusted_API() {
return this;
}
bool PPB_Audio_Impl::Init(PP_Resource config_id,
PPB_Audio_Callback callback, void* user_data) {
// Validate the config and keep a reference to it.
::ppapi::thunk::EnterResourceNoLock< ::ppapi::thunk::PPB_AudioConfig_API>
enter(config_id, true);
if (enter.failed())
return false;
config_id_ = config_id;
ResourceTracker::Get()->AddRefResource(config_id);
if (!callback)
return false;
SetCallback(callback, user_data);
// When the stream is created, we'll get called back on StreamCreated().
CHECK(!audio_);
audio_ = instance()->delegate()->CreateAudio(
enter.object()->GetSampleRate(),
enter.object()->GetSampleFrameCount(),
this);
return audio_ != NULL;
}
PP_Resource PPB_Audio_Impl::GetCurrentConfig() {
// AddRef on behalf of caller.
ResourceTracker::Get()->AddRefResource(config_id_);
return config_id_;
}
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::OpenTrusted(PP_Resource config_id,
PP_CompletionCallback create_callback) {
// Validate the config and keep a reference to it.
::ppapi::thunk::EnterResourceNoLock< ::ppapi::thunk::PPB_AudioConfig_API>
enter(config_id, true);
if (enter.failed())
return false;
config_id_ = config_id;
ResourceTracker::Get()->AddRefResource(config_id);
// When the stream is created, we'll get called back on StreamCreated().
DCHECK(!audio_);
audio_ = instance()->delegate()->CreateAudio(
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.
create_callback_ = create_callback;
create_callback_pending_ = true;
return PP_OK_COMPLETIONPENDING;
}
int32_t PPB_Audio_Impl::GetSyncSocket(int* sync_socket) {
if (socket_for_create_callback_.get()) {
#if defined(OS_POSIX)
*sync_socket = socket_for_create_callback_->handle();
#elif defined(OS_WIN)
*sync_socket = reinterpret_cast<int>(socket_for_create_callback_->handle());
#else
#error "Platform not supported."
#endif
return PP_OK;
}
return PP_ERROR_FAILED;
}
int32_t PPB_Audio_Impl::GetSharedMemory(int* shm_handle, uint32_t* shm_size) {
if (shared_memory_for_create_callback_.get()) {
#if defined(OS_POSIX)
*shm_handle = shared_memory_for_create_callback_->handle().fd;
#elif defined(OS_WIN)
*shm_handle = reinterpret_cast<int>(
shared_memory_for_create_callback_->handle());
#else
#error "Platform not supported."
#endif
*shm_size = shared_memory_size_for_create_callback_;
return PP_OK;
}
return PP_ERROR_FAILED;
}
void PPB_Audio_Impl::StreamCreated(
base::SharedMemoryHandle shared_memory_handle,
size_t shared_memory_size,
base::SyncSocket::Handle socket_handle) {
if (create_callback_pending_) {
// Trusted side of proxy can specify a callback to recieve handles. In
// this case we don't need to map any data or start the thread since it
// will be handled by the proxy.
shared_memory_for_create_callback_.reset(
new base::SharedMemory(shared_memory_handle, false));
shared_memory_size_for_create_callback_ = shared_memory_size;
socket_for_create_callback_.reset(new base::SyncSocket(socket_handle));
PP_RunCompletionCallback(&create_callback_, 0);
create_callback_pending_ = false;
// It might be nice to close the handles here to free up some system
// resources, but we can't since there's a race condition. The handles must
// be valid until they're sent over IPC, which is done from the I/O thread
// which will often get done after this code executes. We could do
// something more elaborate like an ACK from the plugin or post a task to
// the I/O thread and back, but this extra complexity doesn't seem worth it
// just to clean up these handles faster.
} else {
SetStreamInfo(shared_memory_handle, shared_memory_size, socket_handle);
}
}
} // namespace ppapi
} // namespace webkit
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