1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 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 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 19 /******************* 20 * Implementation of a FIFO structure for queueing OMX buffers and commands. 21 ********************/ 22 23 24 #ifndef PV_OMX_QUEUE_H_INCLUDED 25 #define PV_OMX_QUEUE_H_INCLUDED 26 27 #ifndef OSCL_MEM_H_INCLUDED 28 #include "oscl_mem.h" 29 #endif 30 31 #ifndef OMX_Types_h 32 #include "OMX_Types.h" 33 #endif 34 35 #ifndef OMX_Core_h 36 #include "OMX_Core.h" 37 #endif 38 39 /* Queue Depth i.e maximum number of elements */ 40 #define MAX_QUEUE_ELEMENTS 12 41 42 43 /* Queue Element Type */ 44 struct QueueElement 45 { 46 QueueElement* pQueueNext; 47 void* pData; 48 }; 49 50 typedef struct QueueType 51 { 52 QueueElement* pFirst; /** Queue Front */ 53 QueueElement* pLast; /** Queue Rear (last filled element of queue) */ 54 OMX_S32 NumElem; /** Number of elements currently in the queue */ 55 OMX_S32 NumElemAdded; /** Number of elements added extra at run time*/ 56 } QueueType; 57 58 59 60 //QUEUE OPERATIONS 61 62 /* Queue initialization routine */ 63 OSCL_IMPORT_REF OMX_ERRORTYPE QueueInit(QueueType* aQueue); 64 65 /* Queue deinitialization routine */ 66 OSCL_IMPORT_REF void QueueDeinit(QueueType* aQueue); 67 68 /* Function to queue an element in the given queue*/ 69 OSCL_IMPORT_REF OMX_ERRORTYPE Queue(QueueType* aQueue, void* aData); 70 71 /* Function to dequeue an element from the given queue 72 * Returns NULL if the queue is empty */ 73 OSCL_IMPORT_REF void* DeQueue(QueueType* aQueue); 74 75 /* Function to get number of elements currently in the queue */ 76 OSCL_IMPORT_REF OMX_S32 GetQueueNumElem(QueueType* aQueue); 77 78 /* Add new element in the queue if required */ 79 OSCL_IMPORT_REF OMX_BOOL AddQueueElem(QueueType* aQueue); 80 81 #endif //#ifndef PV_OMX_QUEUE_H_INCLUDED 82