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- /*
- * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
- *
- * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
- * the algorithm used
- *
- * 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
- * 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- /**
- * @file
- * huffyuv codec for libavcodec.
- */
- #ifndef AVCODEC_HUFFYUV_H
- #define AVCODEC_HUFFYUV_H
- #include <stdint.h>
- #include "avcodec.h"
- #include "bswapdsp.h"
- #include "get_bits.h"
- #include "huffyuvdsp.h"
- #include "huffyuvencdsp.h"
- #include "put_bits.h"
- #include "lossless_videodsp.h"
- #include "lossless_videoencdsp.h"
- #define VLC_BITS 12
- #define MAX_BITS 16
- #define MAX_N (1<<MAX_BITS)
- #define MAX_VLC_N 16384
- typedef enum Predictor {
- LEFT = 0,
- PLANE,
- MEDIAN,
- } Predictor;
- typedef struct HYuvContext {
- AVClass *class;
- AVCodecContext *avctx;
- Predictor predictor;
- GetBitContext gb;
- PutBitContext pb;
- int interlaced;
- int decorrelate;
- int bitstream_bpp;
- int version;
- int yuy2; //use yuy2 instead of 422P
- int bgr32; //use bgr32 instead of bgr24
- int bps;
- int n; // 1<<bps
- int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N))
- int alpha;
- int chroma;
- int yuv;
- int chroma_h_shift;
- int chroma_v_shift;
- int width, height;
- int flags;
- int context;
- int picture_number;
- int last_slice_end;
- uint8_t *temp[3];
- uint16_t *temp16[3]; ///< identical to temp but 16bit type
- uint64_t stats[4][MAX_VLC_N];
- uint8_t len[4][MAX_VLC_N];
- uint32_t bits[4][MAX_VLC_N];
- uint32_t pix_bgr_map[1<<VLC_BITS];
- VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA
- uint8_t *bitstream_buffer;
- unsigned int bitstream_buffer_size;
- BswapDSPContext bdsp;
- HuffYUVDSPContext hdsp;
- HuffYUVEncDSPContext hencdsp;
- LLVidDSPContext llviddsp;
- LLVidEncDSPContext llvidencdsp;
- int non_determ; // non-deterministic, multi-threaded encoder allowed
- } HYuvContext;
- void ff_huffyuv_common_init(AVCodecContext *s);
- void ff_huffyuv_common_end(HYuvContext *s);
- int ff_huffyuv_alloc_temp(HYuvContext *s);
- int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n);
- #endif /* AVCODEC_HUFFYUV_H */
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