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/*
* Common Ut Video header
* Copyright (c) 2011 Konstantin Shishkov
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_UTVIDEO_H
#define AVCODEC_UTVIDEO_H
/**
* @file
* Common Ut Video header
*/
#include "libavutil/common.h"
#include "avcodec.h"
#include "bswapdsp.h"
#include "huffyuvencdsp.h"
enum {
PRED_NONE = 0,
PRED_LEFT,
PRED_GRADIENT,
PRED_MEDIAN,
};
enum {
COMP_NONE = 0,
COMP_HUFF,
};
/*
* "Original format" markers.
* Based on values gotten from the official VFW encoder.
* They are not used during decoding, but they do have
* an informative role on seeing what was input
* to the encoder.
*/
enum {
UTVIDEO_RGB = MKTAG(0x00, 0x00, 0x01, 0x18),
UTVIDEO_RGBA = MKTAG(0x00, 0x00, 0x02, 0x18),
UTVIDEO_420 = MKTAG('Y', 'V', '1', '2'),
UTVIDEO_422 = MKTAG('Y', 'U', 'Y', '2'),
};
/* Mapping of libavcodec prediction modes to Ut Video's */
extern const int ff_ut_pred_order[5];
/* Order of RGB(A) planes in Ut Video */
extern const int ff_ut_rgb_order[4];
typedef struct UtvideoContext {
const AVClass *class;
AVCodecContext *avctx;
BswapDSPContext bdsp;
HuffYUVEncDSPContext hdsp;
uint32_t frame_info_size, flags, frame_info;
int planes;
int slices;
int compression;
int interlaced;
int frame_pred;
ptrdiff_t slice_stride;
uint8_t *slice_bits, *slice_buffer[4];
int slice_bits_size;
} UtvideoContext;
typedef struct HuffEntry {
uint8_t sym;
uint8_t len;
uint32_t code;
} HuffEntry;
/* Compare huffman tree nodes */
int ff_ut_huff_cmp_len(const void *a, const void *b);
#endif /* AVCODEC_UTVIDEO_H */
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