718273c47f976ca30450eeecbc910d427cfc6202
[libav.git] / libavcodec / utvideo.h
1 /*
2 * Common Ut Video header
3 * Copyright (c) 2011 Konstantin Shishkov
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef AVCODEC_UTVIDEO_H
23 #define AVCODEC_UTVIDEO_H
24
25 /**
26 * @file
27 * Common Ut Video header
28 */
29
30 #include "libavutil/common.h"
31 #include "avcodec.h"
32 #include "bswapdsp.h"
33 #include "huffyuvencdsp.h"
34
35 enum {
36 PRED_NONE = 0,
37 PRED_LEFT,
38 PRED_GRADIENT,
39 PRED_MEDIAN,
40 };
41
42 enum {
43 COMP_NONE = 0,
44 COMP_HUFF,
45 };
46
47 /*
48 * "Original format" markers.
49 * Based on values gotten from the official VFW encoder.
50 * They are not used during decoding, but they do have
51 * an informative role on seeing what was input
52 * to the encoder.
53 */
54 enum {
55 UTVIDEO_RGB = MKTAG(0x00, 0x00, 0x01, 0x18),
56 UTVIDEO_RGBA = MKTAG(0x00, 0x00, 0x02, 0x18),
57 UTVIDEO_420 = MKTAG('Y', 'V', '1', '2'),
58 UTVIDEO_422 = MKTAG('Y', 'U', 'Y', '2'),
59 };
60
61 /* Mapping of libavcodec prediction modes to Ut Video's */
62 extern const int ff_ut_pred_order[5];
63
64 /* Order of RGB(A) planes in Ut Video */
65 extern const int ff_ut_rgb_order[4];
66
67 typedef struct UtvideoContext {
68 AVCodecContext *avctx;
69 BswapDSPContext bdsp;
70 HuffYUVEncDSPContext hdsp;
71
72 uint32_t frame_info_size, flags, frame_info;
73 int planes;
74 int slices;
75 int compression;
76 int interlaced;
77 int frame_pred;
78
79 int slice_stride;
80 uint8_t *slice_bits, *slice_buffer[4];
81 int slice_bits_size;
82 } UtvideoContext;
83
84 typedef struct HuffEntry {
85 uint8_t sym;
86 uint8_t len;
87 uint32_t code;
88 } HuffEntry;
89
90 /* Compare huffman tree nodes */
91 int ff_ut_huff_cmp_len(const void *a, const void *b);
92
93 #endif /* AVCODEC_UTVIDEO_H */