Globally rename the header inclusion guard names.
[libav.git] / libavcodec / mjpegdec.h
1 /*
2 * MJPEG decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
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 mjpegdec.h
26 * MJPEG decoder.
27 */
28
29 #ifndef AVCODEC_MJPEGDEC_H
30 #define AVCODEC_MJPEGDEC_H
31
32 #include "avcodec.h"
33 #include "bitstream.h"
34 #include "dsputil.h"
35
36 #define MAX_COMPONENTS 4
37
38 typedef struct MJpegDecodeContext {
39 AVCodecContext *avctx;
40 GetBitContext gb;
41
42 int start_code; /* current start code */
43 int buffer_size;
44 uint8_t *buffer;
45
46 int16_t quant_matrixes[4][64];
47 VLC vlcs[2][4];
48 int qscale[4]; ///< quantizer scale calculated from quant_matrixes
49
50 int org_height; /* size given at codec init */
51 int first_picture; /* true if decoding first picture */
52 int interlaced; /* true if interlaced */
53 int bottom_field; /* true if bottom field */
54 int lossless;
55 int ls;
56 int progressive;
57 int rgb;
58 int rct; /* standard rct */
59 int pegasus_rct; /* pegasus reversible colorspace transform */
60 int bits; /* bits per component */
61
62 int maxval;
63 int near; ///< near lossless bound (si 0 for lossless)
64 int t1,t2,t3;
65 int reset; ///< context halfing intervall ?rename
66
67 int width, height;
68 int mb_width, mb_height;
69 int nb_components;
70 int component_id[MAX_COMPONENTS];
71 int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
72 int v_count[MAX_COMPONENTS];
73 int comp_index[MAX_COMPONENTS];
74 int dc_index[MAX_COMPONENTS];
75 int ac_index[MAX_COMPONENTS];
76 int nb_blocks[MAX_COMPONENTS];
77 int h_scount[MAX_COMPONENTS];
78 int v_scount[MAX_COMPONENTS];
79 int h_max, v_max; /* maximum h and v counts */
80 int quant_index[4]; /* quant table index for each component */
81 int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
82 AVFrame picture; /* picture structure */
83 int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
84 int8_t *qscale_table;
85 DECLARE_ALIGNED_16(DCTELEM, block[64]);
86 ScanTable scantable;
87 DSPContext dsp;
88
89 int restart_interval;
90 int restart_count;
91
92 int buggy_avid;
93 int cs_itu601;
94 int interlace_polarity;
95
96 int mjpb_skiptosod;
97
98 int cur_scan; /* current scan, used by JPEG-LS */
99 } MJpegDecodeContext;
100
101 int ff_mjpeg_decode_init(AVCodecContext *avctx);
102 int ff_mjpeg_decode_end(AVCodecContext *avctx);
103 int ff_mjpeg_decode_frame(AVCodecContext *avctx,
104 void *data, int *data_size,
105 const uint8_t *buf, int buf_size);
106 int ff_mjpeg_decode_dqt(MJpegDecodeContext *s);
107 int ff_mjpeg_decode_dht(MJpegDecodeContext *s);
108 int ff_mjpeg_decode_sof(MJpegDecodeContext *s);
109 int ff_mjpeg_decode_sos(MJpegDecodeContext *s);
110
111 #endif /* AVCODEC_MJPEGDEC_H */