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109 lines
3.4 KiB
109 lines
3.4 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_INTRAX8_H |
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#define AVCODEC_INTRAX8_H |
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#include "blockdsp.h" |
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#include "get_bits.h" |
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#include "mpegvideo.h" |
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#include "idctdsp.h" |
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#include "intrax8dsp.h" |
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#include "wmv2dsp.h" |
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#include "mpegpicture.h" |
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typedef struct IntraX8Context { |
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VLC *j_ac_vlc[4]; // they point to the static j_mb_vlc |
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VLC *j_orient_vlc; |
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VLC *j_dc_vlc[3]; |
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int use_quant_matrix; |
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// set by ff_intrax8_common_init |
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uint8_t *prediction_table; // 2 * (mb_w * 2) |
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ScanTable scantable[3]; |
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WMV2DSPContext wdsp; |
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uint8_t idct_permutation[64]; |
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AVCodecContext *avctx; |
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//set by the caller codec |
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MpegEncContext * s; |
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IntraX8DSPContext dsp; |
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IDCTDSPContext idsp; |
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BlockDSPContext bdsp; |
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int quant; |
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int dquant; |
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int qsum; |
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int loopfilter; |
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AVFrame *frame; |
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GetBitContext *gb; |
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// calculated per frame |
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int quant_dc_chroma; |
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int divide_quant_dc_luma; |
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int divide_quant_dc_chroma; |
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uint8_t *dest[3]; |
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uint8_t scratchpad[42]; // size of the block is fixed (8x8 plus padding) |
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// changed per block |
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int edges; |
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int flat_dc; |
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int predicted_dc; |
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int raw_orient; |
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int chroma_orient; |
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int orient; |
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int est_run; |
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} IntraX8Context; |
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/** |
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* Initialize IntraX8 frame decoder. |
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* Requires valid MpegEncContext with valid s->mb_width before calling. |
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* @param avctx pointer to AVCodecContext |
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* @param w pointer to IntraX8Context |
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* @param idsp pointer to IDCTDSPContext |
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* @param s pointer to MpegEncContext of the parent codec |
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* @return 0 on success, a negative AVERROR value on error |
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*/ |
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int ff_intrax8_common_init(AVCodecContext *avctx, |
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IntraX8Context *w, IDCTDSPContext *idsp, |
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MpegEncContext *const s); |
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/** |
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* Destroy IntraX8 frame structure. |
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* @param w pointer to IntraX8Context |
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*/ |
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void ff_intrax8_common_end(IntraX8Context *w); |
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/** |
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* Decode single IntraX8 frame. |
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* The parent codec must call ff_mpv_frame_start() before calling this function. |
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* The parent codec must call ff_mpv_frame_end() after calling this function. |
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* This function does not use ff_mpv_decode_mb(). |
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* lowres decoding is theoretically impossible. |
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* @param w pointer to IntraX8Context |
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* @param pict the output Picture containing an AVFrame |
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* @param gb open bitstream reader |
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* @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1. |
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* @param quant_offset offset away from zero |
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* @param loopfilter enable filter after decoding a block |
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*/ |
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int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict, |
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GetBitContext *gb, |
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int quant, int halfpq, int loopfilter); |
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#endif /* AVCODEC_INTRAX8_H */
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