1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_EFFECTCBASESHARED_H
18#define ANDROID_EFFECTCBASESHARED_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/threads.h>
24
25namespace android {
26
27// ----------------------------------------------------------------------------
28
29// Size of buffer used to exchange parameters between application and mediaserver processes.
30#define EFFECT_PARAM_BUFFER_SIZE 1024
31
32
33// Shared memory area used to exchange parameters between application and mediaserver
34// process.
35struct effect_param_cblk_t
36{
37                Mutex       lock;
38    volatile    uint32_t    clientIndex;    // Current read/write index for application
39    volatile    uint32_t    serverIndex;    // Current read/write index for mediaserver
40                uint8_t*    buffer;         // start of parameter buffer
41
42                effect_param_cblk_t()
43                    : lock(Mutex::SHARED), clientIndex(0), serverIndex(0) {}
44};
45
46
47// ----------------------------------------------------------------------------
48
49}; // namespace android
50
51#endif // ANDROID_EFFECTCBASESHARED_H
52