aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Canopus HQX decoder
*
* 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_HQX_H
#define AVCODEC_HQX_H
#include <stdint.h>
#include "libavutil/frame.h"
#include "libavutil/mem.h"
#include "get_bits.h"
#include "hqxdsp.h"
enum HQXACMode {
HQX_AC_Q0 = 0,
HQX_AC_Q8,
HQX_AC_Q16,
HQX_AC_Q32,
HQX_AC_Q64,
HQX_AC_Q128,
NUM_HQX_AC
};
typedef struct HQXLUT {
int16_t lev;
uint8_t run;
int8_t bits;
} HQXLUT;
typedef struct HQXAC {
int lut_bits, extra_bits;
const HQXLUT *lut;
} HQXAC;
struct HQXContext;
typedef int (*mb_decode_func)(struct HQXContext *ctx,
int slice_no, int x, int y);
typedef struct HQXSlice {
GetBitContext gb;
DECLARE_ALIGNED(16, int16_t, block)[16][64];
} HQXSlice;
typedef struct HQXContext {
HQXDSPContext hqxdsp;
HQXSlice slice[16];
AVFrame *pic;
mb_decode_func decode_func;
int format, dcb, width, height;
int interlaced;
uint8_t *src;
unsigned int data_size;
uint32_t slice_off[17];
VLC cbp_vlc;
VLC dc_vlc[3];
} HQXContext;
#define HQX_DC_VLC_BITS 9
extern const HQXAC ff_hqx_ac[NUM_HQX_AC];
int ff_hqx_init_vlcs(HQXContext *ctx);
#endif /* AVCODEC_HQX_H */
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