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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_AUDIO_TRACK_SHARED_H
#define ANDROID_AUDIO_TRACK_SHARED_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/threads.h>
namespace android {
// ----------------------------------------------------------------------------
#define MAX_SAMPLE_RATE 65535
#define THREAD_PRIORITY_AUDIO_CLIENT (ANDROID_PRIORITY_AUDIO)
struct audio_track_cblk_t
{
enum {
SEQUENCE_MASK = 0xFFFFFF00,
BUFFER_MASK = 0x000000FF
};
Mutex lock;
Condition cv;
volatile uint32_t user;
volatile uint32_t server;
volatile union {
uint16_t volume[2];
uint32_t volumeLR;
};
uint16_t sampleRate;
uint16_t reserved;
void* buffers;
size_t size;
audio_track_cblk_t();
uint32_t stepUser(int bufferCount);
bool stepServer(int bufferCount);
void* buffer(int id) const;
};
// ----------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_AUDIO_TRACK_SHARED_H
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