blob: 83309d4b116139f80ebe366f03d6ad98c8b20c5d
| 1 | /* |
| 2 | * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of |
| 5 | * the algorithm used |
| 6 | * |
| 7 | * This file is part of FFmpeg. |
| 8 | * |
| 9 | * FFmpeg is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU Lesser General Public |
| 11 | * License as published by the Free Software Foundation; either |
| 12 | * version 2.1 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * FFmpeg is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with FFmpeg; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * @file |
| 26 | * huffyuv codec for libavcodec. |
| 27 | */ |
| 28 | |
| 29 | #ifndef AVCODEC_HUFFYUV_H |
| 30 | #define AVCODEC_HUFFYUV_H |
| 31 | |
| 32 | #include <stdint.h> |
| 33 | |
| 34 | #include "avcodec.h" |
| 35 | #include "bswapdsp.h" |
| 36 | #include "get_bits.h" |
| 37 | #include "huffyuvdsp.h" |
| 38 | #include "huffyuvencdsp.h" |
| 39 | #include "put_bits.h" |
| 40 | #include "lossless_videodsp.h" |
| 41 | #include "lossless_videoencdsp.h" |
| 42 | |
| 43 | #define VLC_BITS 12 |
| 44 | |
| 45 | #define MAX_BITS 16 |
| 46 | #define MAX_N (1<<MAX_BITS) |
| 47 | #define MAX_VLC_N 16384 |
| 48 | |
| 49 | typedef enum Predictor { |
| 50 | LEFT = 0, |
| 51 | PLANE, |
| 52 | MEDIAN, |
| 53 | } Predictor; |
| 54 | |
| 55 | typedef struct HYuvContext { |
| 56 | AVClass *class; |
| 57 | AVCodecContext *avctx; |
| 58 | Predictor predictor; |
| 59 | GetBitContext gb; |
| 60 | PutBitContext pb; |
| 61 | int interlaced; |
| 62 | int decorrelate; |
| 63 | int bitstream_bpp; |
| 64 | int version; |
| 65 | int yuy2; //use yuy2 instead of 422P |
| 66 | int bgr32; //use bgr32 instead of bgr24 |
| 67 | int bps; |
| 68 | int n; // 1<<bps |
| 69 | int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N)) |
| 70 | int alpha; |
| 71 | int chroma; |
| 72 | int yuv; |
| 73 | int chroma_h_shift; |
| 74 | int chroma_v_shift; |
| 75 | int width, height; |
| 76 | int flags; |
| 77 | int context; |
| 78 | int picture_number; |
| 79 | int last_slice_end; |
| 80 | uint8_t *temp[3]; |
| 81 | uint16_t *temp16[3]; ///< identical to temp but 16bit type |
| 82 | uint64_t stats[4][MAX_VLC_N]; |
| 83 | uint8_t len[4][MAX_VLC_N]; |
| 84 | uint32_t bits[4][MAX_VLC_N]; |
| 85 | uint32_t pix_bgr_map[1<<VLC_BITS]; |
| 86 | VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA |
| 87 | uint8_t *bitstream_buffer; |
| 88 | unsigned int bitstream_buffer_size; |
| 89 | BswapDSPContext bdsp; |
| 90 | HuffYUVDSPContext hdsp; |
| 91 | HuffYUVEncDSPContext hencdsp; |
| 92 | LLVidDSPContext llviddsp; |
| 93 | LLVidEncDSPContext llvidencdsp; |
| 94 | int non_determ; // non-deterministic, multi-threaded encoder allowed |
| 95 | } HYuvContext; |
| 96 | |
| 97 | void ff_huffyuv_common_init(AVCodecContext *s); |
| 98 | void ff_huffyuv_common_end(HYuvContext *s); |
| 99 | int ff_huffyuv_alloc_temp(HYuvContext *s); |
| 100 | int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n); |
| 101 | |
| 102 | #endif /* AVCODEC_HUFFYUV_H */ |
| 103 |