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  1. /*
  2.  * SVQ1 decoder
  3.  * ported to MPlayer by Arpi <arpi@thot.banki.hu>
  4.  * ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
  5.  *
  6.  * Copyright (C) 2002 the xine project
  7.  * Copyright (C) 2002 the ffmpeg project
  8.  *
  9.  * SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
  10.  *
  11.  * This file is part of FFmpeg.
  12.  *
  13.  * FFmpeg is free software; you can redistribute it and/or
  14.  * modify it under the terms of the GNU Lesser General Public
  15.  * License as published by the Free Software Foundation; either
  16.  * version 2.1 of the License, or (at your option) any later version.
  17.  *
  18.  * FFmpeg is distributed in the hope that it will be useful,
  19.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21.  * Lesser General Public License for more details.
  22.  *
  23.  * You should have received a copy of the GNU Lesser General Public
  24.  * License along with FFmpeg; if not, write to the Free Software
  25.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  26.  */
  27.  
  28. /**
  29.  * @file
  30.  * Sorenson Vector Quantizer #1 (SVQ1) video codec.
  31.  * For more information of the SVQ1 algorithm, visit:
  32.  *   http://www.pcisys.net/~melanson/codecs/
  33.  */
  34.  
  35. #ifndef AVCODEC_SVQ1_H
  36. #define AVCODEC_SVQ1_H
  37.  
  38. #include <stdint.h>
  39.  
  40. #define SVQ1_BLOCK_SKIP         0
  41. #define SVQ1_BLOCK_INTER        1
  42. #define SVQ1_BLOCK_INTER_4V     2
  43. #define SVQ1_BLOCK_INTRA        3
  44.  
  45. uint16_t ff_svq1_packet_checksum(const uint8_t *data,
  46.                                  const int length, int value);
  47.  
  48. extern const int8_t *const ff_svq1_inter_codebooks[6];
  49. extern const int8_t *const ff_svq1_intra_codebooks[6];
  50.  
  51. extern const uint8_t ff_svq1_block_type_vlc[4][2];
  52. extern const uint8_t ff_svq1_intra_multistage_vlc[6][8][2];
  53. extern const uint8_t ff_svq1_inter_multistage_vlc[6][8][2];
  54. extern const uint16_t ff_svq1_intra_mean_vlc[256][2];
  55. extern const uint16_t ff_svq1_inter_mean_vlc[512][2];
  56.  
  57. extern const uint16_t ff_svq1_frame_size_table[7][2];
  58.  
  59. #endif /* AVCODEC_SVQ1_H */
  60.