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FFmpeg/libavcodec/svq1.h

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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 svq1.h

  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. typedef struct {

  46.     int width;

  47.     int height;

  48. } svq1_frame_size_t;

  49. 

  50. uint16_t ff_svq1_packet_checksum (const uint8_t *data, const int length,

  51.                                   int value);

  52. 

  53. extern const int8_t* const ff_svq1_inter_codebooks[6];

  54. extern const int8_t* const ff_svq1_intra_codebooks[6];

  55. 

  56. extern const uint8_t ff_svq1_block_type_vlc[4][2];

  57. extern const uint8_t ff_svq1_intra_multistage_vlc[6][8][2];

  58. extern const uint8_t ff_svq1_inter_multistage_vlc[6][8][2];

  59. extern const uint16_t ff_svq1_intra_mean_vlc[256][2];

  60. extern const uint16_t ff_svq1_inter_mean_vlc[512][2];

  61. 

  62. extern const svq1_frame_size_t ff_svq1_frame_size_table[8];

  63. 

  64. #endif /* AVCODEC_SVQ1_H */