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98 lines
2.8 KiB
98 lines
2.8 KiB
/* |
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* Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of |
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* the algorithm used |
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* |
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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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/** |
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* @file |
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* huffyuv codec for libavcodec. |
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*/ |
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#ifndef AVCODEC_HUFFYUV_H |
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#define AVCODEC_HUFFYUV_H |
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#include <stdint.h> |
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#include "avcodec.h" |
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#include "bswapdsp.h" |
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#include "get_bits.h" |
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#include "huffyuvdsp.h" |
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#include "huffyuvencdsp.h" |
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#include "put_bits.h" |
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#include "lossless_videodsp.h" |
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#define VLC_BITS 12 |
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#define MAX_BITS 16 |
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#define MAX_N (1<<MAX_BITS) |
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#define MAX_VLC_N 16384 |
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typedef enum Predictor { |
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LEFT = 0, |
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PLANE, |
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MEDIAN, |
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} Predictor; |
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typedef struct HYuvContext { |
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AVCodecContext *avctx; |
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Predictor predictor; |
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GetBitContext gb; |
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PutBitContext pb; |
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int interlaced; |
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int decorrelate; |
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int bitstream_bpp; |
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int version; |
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int yuy2; //use yuy2 instead of 422P |
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int bgr32; //use bgr32 instead of bgr24 |
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int bps; |
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int n; // 1<<bps |
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int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N)) |
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int alpha; |
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int chroma; |
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int yuv; |
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int chroma_h_shift; |
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int chroma_v_shift; |
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int width, height; |
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int flags; |
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int context; |
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int picture_number; |
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int last_slice_end; |
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uint8_t *temp[3]; |
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uint16_t *temp16[3]; ///< identical to temp but 16bit type |
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uint64_t stats[4][MAX_VLC_N]; |
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uint8_t len[4][MAX_VLC_N]; |
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uint32_t bits[4][MAX_VLC_N]; |
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uint32_t pix_bgr_map[1<<VLC_BITS]; |
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VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA |
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uint8_t *bitstream_buffer; |
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unsigned int bitstream_buffer_size; |
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BswapDSPContext bdsp; |
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HuffYUVDSPContext hdsp; |
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HuffYUVEncDSPContext hencdsp; |
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LLVidDSPContext llviddsp; |
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} HYuvContext; |
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void ff_huffyuv_common_init(AVCodecContext *s); |
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void ff_huffyuv_common_end(HYuvContext *s); |
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int ff_huffyuv_alloc_temp(HYuvContext *s); |
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int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n); |
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#endif /* AVCODEC_HUFFYUV_H */
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