ref: 719a61a653646e781b2024da890c7c6b378a6f1e
dir: /codec/decoder/core/inc/decoder_core.h/
/*! * \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__