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* SVQ1 decoder
* ported to MPlayer by Arpi <>
* ported to libavcodec by Nick Kurshev <>
* Copyright (C) 2002 the xine project
* Copyright (C) 2002 the ffmpeg project
* SVQ1 Encoder (c) 2004 Mike Melanson <>
* This file is part of FFmpeg.
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* @file libavcodec/svq1.h
* Sorenson Vector Quantizer #1 (SVQ1) video codec.
* For more information of the SVQ1 algorithm, visit:
#ifndef AVCODEC_SVQ1_H
#define AVCODEC_SVQ1_H
#include <stdint.h>
#define SVQ1_BLOCK_SKIP 0
#define SVQ1_BLOCK_INTER 1
#define SVQ1_BLOCK_INTER_4V 2
#define SVQ1_BLOCK_INTRA 3
struct svq1_frame_size {
int width;
int height;
uint16_t ff_svq1_packet_checksum (const uint8_t *data, const int length,
int value);
extern const int8_t* const ff_svq1_inter_codebooks[6];
extern const int8_t* const ff_svq1_intra_codebooks[6];
extern const uint8_t ff_svq1_block_type_vlc[4][2];
extern const uint8_t ff_svq1_intra_multistage_vlc[6][8][2];
extern const uint8_t ff_svq1_inter_multistage_vlc[6][8][2];
extern const uint16_t ff_svq1_intra_mean_vlc[256][2];
extern const uint16_t ff_svq1_inter_mean_vlc[512][2];
extern const struct svq1_frame_size ff_svq1_frame_size_table[8];
#endif /* AVCODEC_SVQ1_H */