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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 | ||
42 | #define VLC_BITS 12 | |
43 | ||
44 | #define MAX_BITS 16 | |
45 | #define MAX_N (1<<MAX_BITS) | |
46 | #define MAX_VLC_N 16384 | |
47 | ||
48 | typedef enum Predictor { | |
49 | LEFT = 0, | |
50 | PLANE, | |
51 | MEDIAN, | |
52 | } Predictor; | |
53 | ||
54 | typedef struct HYuvContext { | |
55 | AVClass *class; | |
56 | AVCodecContext *avctx; | |
57 | Predictor predictor; | |
58 | GetBitContext gb; | |
59 | PutBitContext pb; | |
60 | int interlaced; | |
61 | int decorrelate; | |
62 | int bitstream_bpp; | |
63 | int version; | |
64 | int yuy2; //use yuy2 instead of 422P | |
65 | int bgr32; //use bgr32 instead of bgr24 | |
66 | int bps; | |
67 | int n; // 1<<bps | |
68 | int vlc_n; // number of vlc codes (FFMIN(1<<bps, MAX_VLC_N)) | |
69 | int alpha; | |
70 | int chroma; | |
71 | int yuv; | |
72 | int chroma_h_shift; | |
73 | int chroma_v_shift; | |
74 | int width, height; | |
75 | int flags; | |
76 | int context; | |
77 | int picture_number; | |
78 | int last_slice_end; | |
79 | uint8_t *temp[3]; | |
80 | uint16_t *temp16[3]; ///< identical to temp but 16bit type | |
81 | uint64_t stats[4][MAX_VLC_N]; | |
82 | uint8_t len[4][MAX_VLC_N]; | |
83 | uint32_t bits[4][MAX_VLC_N]; | |
84 | uint32_t pix_bgr_map[1<<VLC_BITS]; | |
85 | VLC vlc[8]; //Y,U,V,A,YY,YU,YV,AA | |
86 | uint8_t *bitstream_buffer; | |
87 | unsigned int bitstream_buffer_size; | |
88 | BswapDSPContext bdsp; | |
89 | HuffYUVDSPContext hdsp; | |
90 | HuffYUVEncDSPContext hencdsp; | |
91 | LLVidDSPContext llviddsp; | |
92 | int non_determ; // non-deterministic, multi-threaded encoder allowed | |
93 | } HYuvContext; | |
94 | ||
95 | void ff_huffyuv_common_init(AVCodecContext *s); | |
96 | void ff_huffyuv_common_end(HYuvContext *s); | |
97 | int ff_huffyuv_alloc_temp(HYuvContext *s); | |
98 | int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n); | |
99 | ||
100 | #endif /* AVCODEC_HUFFYUV_H */ |