2 * Canopus HQ/HQA decoder
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_HQ_HQA_H
22 #define AVCODEC_HQ_HQA_H
27 #include "bytestream.h"
28 #include "hq_hqadsp.h"
31 #define NUM_HQ_AC_ENTRIES 746
32 #define NUM_HQ_PROFILES 22
33 #define NUM_HQ_QUANTS 16
35 typedef struct HQContext {
36 AVCodecContext *avctx;
37 HQDSPContext hqhqadsp;
42 DECLARE_ALIGNED(16, int16_t, block)[12][64];
45 typedef struct HQProfile {
46 const uint8_t *perm_tab;
52 extern const int32_t * const ff_hq_quants[16][2][4];
53 extern const HQProfile ff_hq_profile[NUM_HQ_PROFILES];
55 extern const uint8_t ff_hq_ac_skips[NUM_HQ_AC_ENTRIES];
56 extern const int16_t ff_hq_ac_syms [NUM_HQ_AC_ENTRIES];
58 int ff_hq_init_vlcs(HQContext *c);
60 #endif /* AVCODEC_HQ_HQA_H */