/*! * \copy *     Copyright (c)  2008-2013, Cisco Systems *     All rights reserved. * *     Redistribution and use in source and binary forms, with or without *     modification, are permitted provided that the following conditions *     are met: * *        * Redistributions of source code must retain the above copyright *          notice, this list of conditions and the following disclaimer. * *        * Redistributions in binary form must reproduce the above copyright *          notice, this list of conditions and the following disclaimer in *          the documentation and/or other materials provided with the *          distribution. * *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *     COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, *     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER *     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT *     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN *     ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE *     POSSIBILITY OF SUCH DAMAGE. * * *  decoder_core.h * *  Abstract *      Encapsulative core interfaces * *  History *      07/10/2008 Created * *****************************************************************************/#ifndef WELS_DECODER_CORE_H__#define WELS_DECODER_CORE_H__ #include "typedefs.h"#include "wels_common_basis.h"#include "decoder_context.h" #include "codec_def.h" /* * InitBsBuffer * Memory allocation for Bitstream Buffer * return: *  0 - success; otherwise returned error_no defined in error_no.h. */int32_t InitBsBuffer (PWelsDecoderContext pCtx); /* * ExpandBsBuffer * Expand current BS buffer and copy its content * new buffer size will consider input size as a reference * return: *  0 - success; otherwise returned error_no defined in error_no.h. */int32_t ExpandBsBuffer (PWelsDecoderContext pCtx, const int32_t kiSrcLen); /* * ExpandBsLenBuffer * Expand current BS length buffer to double size or maximum, due to max slice number exceeding * Parameter: * kiCurrLen: current value of total nal number (including non-VCL nal) * return: *  0 - success; otherwise returned error_no defined in error_no.h. */int32_t ExpandBsLenBuffer (PWelsDecoderContext pCtx, const int32_t kiCurrLen); /* * CheckBsBuffer * Check if current buffer size is enough */int32_t CheckBsBuffer (PWelsDecoderContext pCtx, const int32_t kiSrcLen); /* * WelsInitStaticMemory * Memory request for introduced data at decoder start * Especially for: * rbsp_au_buffer, cur_dq_layer_ptr and ref_dq_layer_ptr in MB info cache. * return: *  0 - success; otherwise returned error_no defined in error_no.h. */int32_t WelsInitStaticMemory (PWelsDecoderContext pCtx); /* * WelsFreeStaticMemory * Free memory introduced in WelsInitStaticMemory at destruction of decoder. * */void WelsFreeStaticMemory (PWelsDecoderContext pCtx); /*! * \brief   request memory when maximal picture width and height are available */int32_t InitialDqLayersContext (PWelsDecoderContext pCtx, const int32_t kiMaxWidth, const int32_t kiMaxHeight); /*! * \brief   free dq layer context memory related */void UninitialDqLayersContext (PWelsDecoderContext pCtx); /* *  DecodeNalHeaderExt *  Trigger condition: NAL_UNIT_TYPE = NAL_UNIT_PREFIX or NAL_UNIT_CODED_SLICE_EXT *  Parameter: *  pNal:   target NALUnit ptr *  pSrc:   NAL Unit bitstream */void DecodeNalHeaderExt (PNalUnit pNal, uint8_t* pSrc); /* *  ParseSliceHeaderSyntaxs *  Parse slice header of bitstream */int32_t ParseSliceHeaderSyntaxs (PWelsDecoderContext pCtx, PBitStringAux pBs, const bool kbExtensionFlag);/* *  Copy relative syntax elements of NALUnitHeaderExt, sRefPicBaseMarking and bStoreRefBasePicFlag in prefix nal unit. *  pSrc:   mark as decoded prefix NAL *  pDst:   succeeded VCL NAL based AVC (I/P Slice) */bool PrefetchNalHeaderExtSyntax (PWelsDecoderContext pCtx, PNalUnit const kpDst, PNalUnit const kpSrc); /** WelsDecodeInitAccessUnitStart* check and (re)allocate picture buffers on new sequence begin*  bit_len:    size in bit length of data*  buf_len:    size in byte length of data*  coded_au:   mark an Access Unit decoding finished* return:*  0 - success; otherwise returned error_no defined in error_no.h*/int32_t WelsDecodeInitAccessUnitStart (PWelsDecoderContext pCtx, SBufferInfo* pDstInfo);/** AllocPicBuffOnNewSeqBegin* check and (re)allocate picture buffers on new sequence begin* return:*  0 - success; otherwise returned error_no defined in error_no.h*/int32_t AllocPicBuffOnNewSeqBegin (PWelsDecoderContext pCtx); /** InitConstructAccessUnit* Init before constructing an access unit for given input bitstream, maybe partial NAL Unit, one or more Units are involved to* joint a collective access unit.* parameter\*  SBufferInfo:    Buffer info* return:*  0 - success; otherwise returned error_no defined in error_no.h*/int32_t InitConstructAccessUnit (PWelsDecoderContext pCtx, SBufferInfo* pDstInfo); /* * ConstructAccessUnit * construct an access unit for given input bitstream, maybe partial NAL Unit, one or more Units are involved to * joint a collective access unit. * parameter\ *  buf:        bitstream data buffer *  bit_len:    size in bit length of data *  buf_len:    size in byte length of data *  coded_au:   mark an Access Unit decoding finished * return: *  0 - success; otherwise returned error_no defined in error_no.h */int32_t ConstructAccessUnit (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferInfo* pDstInfo);  /* * DecodeCurrentAccessUnit * Decode current access unit when current AU is completed. */int32_t DecodeCurrentAccessUnit (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferInfo* pDstInfo); /* * Check if frame is completed and EC is required */bool CheckAndFinishLastPic (PWelsDecoderContext pCtx, uint8_t** pDst, SBufferInfo* pDstInfo);/* *  Prepare current dq layer context initialization. */void WelsDqLayerDecodeStart (PWelsDecoderContext pCtx, PNalUnit pCurNal, PSps pSps, PPps pPps);  int32_t WelsDecodeAccessUnitStart (PWelsDecoderContext pCtx);void WelsDecodeAccessUnitEnd (PWelsDecoderContext pCtx);void DecodeFinishUpdate (PWelsDecoderContext pCtx); void ForceResetCurrentAccessUnit (PAccessUnit pAu);void ForceClearCurrentNal (PAccessUnit pAu); bool CheckRefPicturesComplete (PWelsDecoderContext pCtx); // Check whether all ref pictures are complete void ForceResetParaSetStatusAndAUList (PWelsDecoderContext pCtx); #endif//WELS_DECODER_CORE_H__