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Ethan Hugg
166
codec/decoder/core/src/pic_queue.cpp
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166
codec/decoder/core/src/pic_queue.cpp
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/*!
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* \copy
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* Copyright (c) 2009-2013, Cisco Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* \file pic_queue.c
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*
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* \brief Recycled piture queue implementation
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*
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* \date 03/13/2009 Created
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*
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*************************************************************************************
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*/
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#include <string.h>
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#include "pic_queue.h"
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#include "wels_const.h"
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#include "utils.h"
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#include "macros.h"
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#include "decoder_context.h"
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#include "codec_def.h"
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#include "mem_align.h"
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namespace WelsDec {
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void_t FreePicture( PPicture pPic );
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///////////////////////////////////Recycled queue management for pictures///////////////////////////////////
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/* ______________________________________
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-->| P0 | P1 | P2 | P3 | P4 | .. | Pn-1 |-->
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--------------------------------------
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*
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* How does it work?
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* node <- next; ++ next;
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*
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*/
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PPicture AllocPicture( PWelsDecoderContext pCtx, const int32_t kiPicWidth, const int32_t kiPicHeight )
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{
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PPicture pPic = NULL;
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int32_t iPicWidth = 0;
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int32_t iPicHeight= 0;
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int32_t iPicChromaWidth = 0;
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int32_t iPicChromaHeight = 0;
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int32_t iLumaSize = 0;
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int32_t iChromaSize = 0;
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pPic = (PPicture) WelsMalloc( sizeof(SPicture), "PPicture" );
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WELS_VERIFY_RETURN_IF( NULL, NULL == pPic );
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memset(pPic, 0, sizeof(SPicture) );
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iPicWidth = WELS_ALIGN(kiPicWidth + (PADDING_LENGTH<<1), PICTURE_RESOLUTION_ALIGNMENT);
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iPicHeight = WELS_ALIGN(kiPicHeight + (PADDING_LENGTH<<1), PICTURE_RESOLUTION_ALIGNMENT);
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iPicChromaWidth = iPicWidth >> 1;
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iPicChromaHeight = iPicHeight >> 1;
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iLumaSize = iPicWidth * iPicHeight;
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iChromaSize = iPicChromaWidth * iPicChromaHeight;
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if(pCtx->iDecoderMode == SW_MODE)
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{
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pPic->pBuffer[0] = static_cast<uint8_t*> (WelsMalloc( iLumaSize /* luma */
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+ (iChromaSize << 1) /* Cb,Cr */, "_pic->buffer[0]" ) );
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WELS_VERIFY_RETURN_PROC_IF( NULL, NULL == pPic->pBuffer[0], FreePicture(pPic) );
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pPic->iLinesize[0] = iPicWidth;
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pPic->iLinesize[1] = pPic->iLinesize[2] = iPicChromaWidth;
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pPic->pBuffer[1] = pPic->pBuffer[0] + iLumaSize;
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pPic->pBuffer[2] = pPic->pBuffer[1] + iChromaSize;
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pPic->pData[0] = pPic->pBuffer[0] + (1+pPic->iLinesize[0]) * PADDING_LENGTH;
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pPic->pData[1] = pPic->pBuffer[1] + /*WELS_ALIGN*/( ((1+pPic->iLinesize[1]) * PADDING_LENGTH) >> 1 );
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pPic->pData[2] = pPic->pBuffer[2] + /*WELS_ALIGN*/( ((1+pPic->iLinesize[2]) * PADDING_LENGTH) >> 1 );
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}
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pPic->iPlanes = 3; // yv12 in default
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pPic->iWidthInPixel = kiPicWidth;
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pPic->iHeightInPixel= kiPicHeight;
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pPic->iFrameNum = -1;
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pPic->bAvailableFlag= true;
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return pPic;
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}
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void_t FreePicture( PPicture pPic )
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{
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if ( NULL != pPic )
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{
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if ( pPic->pBuffer[0] )
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{
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WelsFree( pPic->pBuffer[0], "pPic->pBuffer[0]" );
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}
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WelsFree( pPic, "pPic" );
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pPic = NULL;
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}
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}
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PPicture PrefetchPic( PPicBuff pPicBuf )
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{
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int32_t iPicIdx = 0;
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PPicture pPic = NULL;
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if (pPicBuf->iCapacity == 0)
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{
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return NULL;
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}
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for ( iPicIdx = pPicBuf->iCurrentIdx+1; iPicIdx<pPicBuf->iCapacity ;++iPicIdx)
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{
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if (pPicBuf->ppPic[iPicIdx] !=NULL && pPicBuf->ppPic[iPicIdx]->bAvailableFlag && !pPicBuf->ppPic[iPicIdx]->bUsedAsRef)
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{
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pPic = pPicBuf->ppPic[iPicIdx];
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break;
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}
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}
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if (pPic !=NULL)
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{
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pPicBuf->iCurrentIdx = iPicIdx;
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return pPic;
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}
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for ( iPicIdx = 0 ; iPicIdx<pPicBuf->iCurrentIdx ;++iPicIdx)
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{
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if (pPicBuf->ppPic[iPicIdx] !=NULL && pPicBuf->ppPic[iPicIdx]->bAvailableFlag && !pPicBuf->ppPic[iPicIdx]->bUsedAsRef)
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{
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pPic = pPicBuf->ppPic[iPicIdx];
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break;
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}
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}
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pPicBuf->iCurrentIdx = iPicIdx;
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return pPic;
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}
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} // namespace WelsDec
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