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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 "chrome/browser/renderer_host/audio_sync_reader.h"
#include "base/process_util.h"
#include "base/shared_memory.h"
AudioSyncReader::AudioSyncReader(base::SharedMemory* shared_memory)
: shared_memory_(shared_memory) {
}
AudioSyncReader::~AudioSyncReader() {
}
// media::AudioOutputController::SyncReader implementations.
void AudioSyncReader::UpdatePendingBytes(uint32 bytes) {
socket_->Send(&bytes, sizeof(bytes));
}
uint32 AudioSyncReader::Read(void* data, uint32 size) {
uint32 read_size = std::min(size, shared_memory_->created_size());
memcpy(data, shared_memory_->memory(), read_size);
memset(shared_memory_->memory(), 0, shared_memory_->created_size());
return read_size;
}
void AudioSyncReader::Close() {
socket_->Close();
}
bool AudioSyncReader::Init() {
base::SyncSocket* sockets[2] = {0};
if (base::SyncSocket::CreatePair(sockets)) {
socket_.reset(sockets[0]);
foreign_socket_.reset(sockets[1]);
return true;
}
return false;
}
#if defined(OS_WIN)
bool AudioSyncReader::PrepareForeignSocketHandle(
base::ProcessHandle process_handle,
base::SyncSocket::Handle* foreign_handle) {
::DuplicateHandle(GetCurrentProcess(), foreign_socket_->handle(),
process_handle, foreign_handle,
0, FALSE, DUPLICATE_SAME_ACCESS);
if (*foreign_handle != 0)
return true;
return false;
}
#else
bool AudioSyncReader::PrepareForeignSocketHandle(
base::ProcessHandle process_handle,
base::FileDescriptor* foreign_handle) {
foreign_handle->fd = foreign_socket_->handle();
foreign_handle->auto_close = false;
if (foreign_handle->fd != -1)
return true;
return false;
}
#endif
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