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 25 namespace 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. 35 struct 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 effect_param_cblk_teffect_param_cblk_t42 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