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