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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/audio_helper.h"
#include "base/logging.h"
#include "content/common/pepper_file_util.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/pp_errors.h"
using ppapi::TrackedCallback;
namespace content {
// AudioHelper -----------------------------------------------------------------
AudioHelper::AudioHelper() : shared_memory_size_for_create_callback_(0) {}
AudioHelper::~AudioHelper() {}
int32_t AudioHelper::GetSyncSocketImpl(int* sync_socket) {
if (socket_for_create_callback_) {
*sync_socket = IntegerFromSyncSocketHandle(
socket_for_create_callback_->handle());
return PP_OK;
}
return PP_ERROR_FAILED;
}
int32_t AudioHelper::GetSharedMemoryImpl(base::SharedMemory** shm,
uint32_t* shm_size) {
if (shared_memory_for_create_callback_) {
*shm = shared_memory_for_create_callback_.get();
*shm_size = shared_memory_size_for_create_callback_;
return PP_OK;
}
return PP_ERROR_FAILED;
}
void AudioHelper::StreamCreated(base::SharedMemoryHandle shared_memory_handle,
size_t shared_memory_size,
base::SyncSocket::Handle socket_handle) {
if (TrackedCallback::IsPending(create_callback_)) {
// Trusted side of proxy can specify a callback to receive 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));
create_callback_->Run(PP_OK);
// 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 {
OnSetStreamInfo(shared_memory_handle, shared_memory_size, socket_handle);
}
}
void AudioHelper::SetCreateCallback(
scoped_refptr<ppapi::TrackedCallback> create_callback) {
DCHECK(!TrackedCallback::IsPending(create_callback_));
create_callback_ = create_callback;
}
} // namespace content
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