aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Canopus HQ/HQA 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_HQ_HQA_H
#define AVCODEC_HQ_HQA_H
#include <stdint.h>
#include "avcodec.h"
#include "bytestream.h"
#include "hq_hqadsp.h"
#include "vlc.h"
#define NUM_HQ_AC_ENTRIES 746
#define NUM_HQ_PROFILES 22
#define NUM_HQ_QUANTS 16
typedef struct HQContext {
AVCodecContext *avctx;
HQDSPContext hqhqadsp;
GetByteContext gbc;
VLC hq_ac_vlc;
VLC hqa_cbp_vlc;
DECLARE_ALIGNED(16, int16_t, block)[12][64];
} HQContext;
typedef struct HQProfile {
const uint8_t *perm_tab;
int width, height;
int num_slices;
int tab_w, tab_h;
} HQProfile;
extern const int32_t * const ff_hq_quants[16][2][4];
extern const HQProfile ff_hq_profile[NUM_HQ_PROFILES];
extern const uint8_t ff_hq_ac_skips[NUM_HQ_AC_ENTRIES];
extern const int16_t ff_hq_ac_syms [NUM_HQ_AC_ENTRIES];
int ff_hq_init_vlcs(HQContext *c);
#endif /* AVCODEC_HQ_HQA_H */
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