22526c1f55
Based on work by Kostya Shishkov <kostya.shishkov@gmail.com>. Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/*
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* Canopus HQ/HQA decoder
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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_HQ_HQA_H
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#define AVCODEC_HQ_HQA_H
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#include <stdint.h>
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#include "avcodec.h"
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#include "get_bits.h"
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#include "bytestream.h"
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#include "hq_hqadsp.h"
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#define NUM_HQ_AC_ENTRIES 746
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#define NUM_HQ_PROFILES 22
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#define NUM_HQ_QUANTS 16
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typedef struct HQContext {
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AVCodecContext *avctx;
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HQDSPContext hqhqadsp;
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GetByteContext gbc;
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VLC hq_ac_vlc;
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VLC hqa_cbp_vlc;
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DECLARE_ALIGNED(16, int16_t, block)[12][64];
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} HQContext;
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typedef struct HQProfile {
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const uint8_t *perm_tab;
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int width, height;
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int num_slices;
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int tab_w, tab_h;
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} HQProfile;
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extern const int32_t * const ff_hq_quants[16][2][4];
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extern const HQProfile ff_hq_profile[NUM_HQ_PROFILES];
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extern const uint8_t ff_hq_ac_skips[NUM_HQ_AC_ENTRIES];
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extern const int16_t ff_hq_ac_syms [NUM_HQ_AC_ENTRIES];
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int ff_hq_init_vlcs(HQContext *c);
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#endif /* AVCODEC_HQ_HQA_H */
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