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  1. /*
  2.  * Canopus HQ/HQA decoder
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  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.
  10.  *
  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.
  15.  *
  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
  19.  */
  20.  
  21. #ifndef AVCODEC_HQ_HQA_H
  22. #define AVCODEC_HQ_HQA_H
  23.  
  24. #include <stdint.h>
  25.  
  26. #include "avcodec.h"
  27. #include "get_bits.h"
  28. #include "bytestream.h"
  29. #include "hq_hqadsp.h"
  30.  
  31. #define NUM_HQ_AC_ENTRIES 746
  32. #define NUM_HQ_PROFILES   22
  33. #define NUM_HQ_QUANTS     16
  34.  
  35. typedef struct HQContext {
  36.     AVCodecContext *avctx;
  37.     HQDSPContext hqhqadsp;
  38.     GetByteContext gbc;
  39.  
  40.     VLC hq_ac_vlc;
  41.     VLC hqa_cbp_vlc;
  42.     DECLARE_ALIGNED(16, int16_t, block)[12][64];
  43. } HQContext;
  44.  
  45. typedef struct HQProfile {
  46.     const uint8_t *perm_tab;
  47.     int width, height;
  48.     int num_slices;
  49.     int tab_w, tab_h;
  50. } HQProfile;
  51.  
  52. extern const int32_t * const ff_hq_quants[16][2][4];
  53. extern const HQProfile ff_hq_profile[NUM_HQ_PROFILES];
  54.  
  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];
  57.  
  58. int ff_hq_init_vlcs(HQContext *c);
  59.  
  60. #endif /* AVCODEC_HQ_HQA_H */
  61.