aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Copyright (c) 2015 Kieran Kunhya
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_CFHD_H
#define AVCODEC_CFHD_H
#include <stdint.h>
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "vlc.h"
#define VLC_BITS 9
#define SUBBAND_COUNT 10
typedef struct CFHD_RL_VLC_ELEM {
int16_t level;
int8_t len;
uint16_t run;
} CFHD_RL_VLC_ELEM;
#define DWT_LEVELS 3
typedef struct SubBand {
int level;
int orientation;
ptrdiff_t stride;
int a_width;
int width;
int a_height;
int height;
int pshift;
int quant;
uint8_t *ibuf;
} SubBand;
typedef struct Plane {
int width;
int height;
ptrdiff_t stride;
int16_t *idwt_buf;
int16_t *idwt_tmp;
/* TODO: merge this into SubBand structure */
int16_t *subband[SUBBAND_COUNT];
int16_t *l_h[8];
SubBand band[DWT_LEVELS][4];
} Plane;
typedef struct Peak {
int level;
int offset;
GetByteContext base;
} Peak;
typedef struct CFHDContext {
AVCodecContext *avctx;
CFHD_RL_VLC_ELEM table_9_rl_vlc[2088];
VLC vlc_9;
CFHD_RL_VLC_ELEM table_18_rl_vlc[4572];
VLC vlc_18;
GetBitContext gb;
int coded_width;
int coded_height;
int cropped_height;
enum AVPixelFormat coded_format;
int progressive;
int a_width;
int a_height;
int a_format;
int bpc; // bits per channel/component
int channel_cnt;
int subband_cnt;
int channel_num;
uint8_t lowpass_precision;
uint16_t quantisation;
int wavelet_depth;
int pshift;
int codebook;
int difference_coding;
int subband_num;
int level;
int subband_num_actual;
uint8_t prescale_shift[3];
Plane plane[4];
Peak peak;
} CFHDContext;
int ff_cfhd_init_vlcs(CFHDContext *s);
#endif /* AVCODEC_CFHD_H */
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