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https://github.com/FFmpeg/FFmpeg.git
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3485332bf9
Decodes YUV 4:2:2 10-bit and RGB 12-bit files. Older files with more subbands, skips, Bayer, alpha not supported. Alpha requires addition of GBRAP12 pixel format.
113 lines
2.3 KiB
C
113 lines
2.3 KiB
C
/*
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* Copyright (c) 2015 Kieran Kunhya
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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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#ifndef AVCODEC_CFHD_H
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#define AVCODEC_CFHD_H
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#include <stdint.h>
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#include "libavutil/avassert.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#define VLC_BITS 9
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#define NB_VLC_TABLE_9 (71+3)
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#define NB_VLC_TABLE_18 (263+1)
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typedef struct CFHD_RL_VLC_ELEM {
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int16_t level;
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int8_t len;
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uint16_t run;
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} CFHD_RL_VLC_ELEM;
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#define DWT_LEVELS 3
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typedef struct SubBand {
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int level;
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int orientation;
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int stride;
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int a_width;
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int width;
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int a_height;
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int height;
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int pshift;
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int quant;
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uint8_t *ibuf;
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} SubBand;
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typedef struct Plane {
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int width;
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int height;
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ptrdiff_t stride;
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int16_t *idwt_buf;
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int16_t *idwt_tmp;
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/* TODO: merge this into SubBand structure */
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int16_t *subband[10];
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int16_t *l_h[8];
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SubBand band[DWT_LEVELS][4];
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} Plane;
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typedef struct CFHDContext {
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AVCodecContext *avctx;
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CFHD_RL_VLC_ELEM table_9_rl_vlc[2088];
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VLC vlc_9;
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CFHD_RL_VLC_ELEM table_18_rl_vlc[4572];
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VLC vlc_18;
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GetBitContext gb;
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int chroma_x_shift;
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int chroma_y_shift;
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int coded_width;
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int coded_height;
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int a_width;
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int a_height;
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int bpc;
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int channel_cnt;
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int subband_cnt;
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int channel_num;
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uint8_t lowpass_precision;
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uint16_t quantisation;
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int wavelet_depth;
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int pshift;
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int codebook;
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int subband_num;
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int level;
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int subband_num_actual;
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uint8_t prescale_shift[3];
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Plane plane[4];
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} CFHDContext;
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int ff_cfhd_init_vlcs(CFHDContext *s);
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#endif /* AVCODEC_CFHD_H */
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