text: /******************************************************************************
  *
  * Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
  *
  * 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.
  *
  ******************************************************************************/
  /**
  *******************************************************************************
  * @file
  *  ihevc_buf_mgr.h
  *
  * @brief
  *  Function declarations used for buffer management
  *
  * @author
  *  Srinivas T
  *
  * @remarks
  *  None
  *
  *******************************************************************************
  */
  #ifndef _BUF_MGR_H_
  #define _BUF_MGR_H_
  
  #define BUF_MGR_MAX_CNT 64
  
  #define BUF_MGR_DEC         1
  #define BUF_MGR_REF         (1 << 1)
  #define BUF_MGR_DISP        (1 << 2)
  
  typedef struct
  {
      /**
       * max_buf_cnt
       */
      UWORD32 u4_max_buf_cnt;
  
      /**
       * active_buf_cnt
       */
      UWORD32 u4_active_buf_cnt;
      /**
       *  au4_status[BUF_MGR_MAX_CNT]
       */
      UWORD32 au4_status[BUF_MGR_MAX_CNT];
      /* The last three bit of status are:    */
      /* Bit 0 - DEC                          */
      /* Bit 1 - REF                          */
      /* Bit 2 - DISP                         */
  
      void    *apv_ptr[BUF_MGR_MAX_CNT];
  }buf_mgr_t;
  
  // intializes the buffer API structure
  void ihevc_buf_mgr_init(
                  buf_mgr_t *ps_buf_mgr);
  
  // Add buffer to buffer manager. 0: success, -1: fail (u4_active_buf_cnt has reached u4_max_buf_cnt)
  WORD32 ihevc_buf_mgr_add(
                  buf_mgr_t *ps_buf_mgr,
                  void *pv_ptr,
                  WORD32 buf_id);
  
  // this function will set the buffer status to DEC
  void* ihevc_buf_mgr_get_next_free(
                  buf_mgr_t *ps_buf_mgr,
                  WORD32 *pi4_id);
  
  // this function will check if there are any free buffers
  WORD32 ihevc_buf_mgr_check_free(
                  buf_mgr_t *ps_buf_mgr);
  
  // mask will have who released it: DISP:REF:DEC
  WORD32 ihevc_buf_mgr_release(
                  buf_mgr_t *ps_buf_mgr,
                  WORD32 id,
                  UWORD32 mask);
  
  // sets the status to one or all of DISP:REF:DEC
  WORD32 ihevc_buf_mgr_set_status(
                  buf_mgr_t *ps_buf_mgr,
                  WORD32 id,
                  UWORD32 mask);
  
  // Gets status of the buffer
  UWORD32 ihevc_buf_mgr_get_status(
                  buf_mgr_t *ps_buf_mgr,
                  WORD32 id);
  
  // pass the ID - buffer will be returned
  void* ihevc_buf_mgr_get_buf(
                  buf_mgr_t *ps_buf_mgr,
                  WORD32 id);
  
  // will return number of active buffers
  UWORD32 ihevc_buf_mgr_get_num_active_buf(
                  buf_mgr_t *ps_buf_mgr);
  
  
  
  #endif  //_BUF_MGR_H_
  