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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/browser/renderer_host/media/audio_input_sync_writer.h"
#include <algorithm>
#include "base/process_util.h"
#include "base/shared_memory.h"
namespace content {
AudioInputSyncWriter::AudioInputSyncWriter(
base::SharedMemory* shared_memory,
int shared_memory_segment_count)
: shared_memory_(shared_memory),
shared_memory_segment_count_(shared_memory_segment_count),
current_segment_id_(0) {
DCHECK_GT(shared_memory_segment_count, 0);
DCHECK_EQ(shared_memory->requested_size() % shared_memory_segment_count, 0u);
shared_memory_segment_size_ =
shared_memory->requested_size() / shared_memory_segment_count;
}
AudioInputSyncWriter::~AudioInputSyncWriter() {}
// TODO(henrika): Combine into one method (including Write).
void AudioInputSyncWriter::UpdateRecordedBytes(uint32 bytes) {
socket_->Send(&bytes, sizeof(bytes));
}
uint32 AudioInputSyncWriter::Write(
const void* data, uint32 size, double volume) {
uint8* ptr = static_cast<uint8*>(shared_memory_->memory());
ptr += current_segment_id_ * shared_memory_segment_size_;
media::AudioInputBuffer* buffer =
reinterpret_cast<media::AudioInputBuffer*>(ptr);
buffer->params.volume = volume;
buffer->params.size = size;
memcpy(buffer->audio, data, size);
if (++current_segment_id_ >= shared_memory_segment_count_)
current_segment_id_ = 0;
return size;
}
void AudioInputSyncWriter::Close() {
socket_->Close();
}
bool AudioInputSyncWriter::Init() {
socket_.reset(new base::CancelableSyncSocket());
foreign_socket_.reset(new base::CancelableSyncSocket());
return base::CancelableSyncSocket::CreatePair(socket_.get(),
foreign_socket_.get());
}
#if defined(OS_WIN)
bool AudioInputSyncWriter::PrepareForeignSocketHandle(
base::ProcessHandle process_handle,
base::SyncSocket::Handle* foreign_handle) {
::DuplicateHandle(GetCurrentProcess(), foreign_socket_->handle(),
process_handle, foreign_handle,
0, FALSE, DUPLICATE_SAME_ACCESS);
return (*foreign_handle != 0);
}
#else
bool AudioInputSyncWriter::PrepareForeignSocketHandle(
base::ProcessHandle process_handle,
base::FileDescriptor* foreign_handle) {
foreign_handle->fd = foreign_socket_->handle();
foreign_handle->auto_close = false;
return (foreign_handle->fd != -1);
}
#endif
} // namespace content
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