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dirac.h
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1 /*
2  * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3  * Copyright (C) 2009 David Conrad
4  * Copyright (C) 2011 Jordi Ortiz
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #ifndef AVCODEC_DIRAC_H
24 #define AVCODEC_DIRAC_H
25 
26 /**
27  * @file
28  * Interface to Dirac Decoder/Encoder
29  * @author Marco Gerards <marco@gnu.org>
30  * @author David Conrad
31  * @author Jordi Ortiz
32  */
33 
34 #include "avcodec.h"
35 
36 /**
37  * The spec limits the number of wavelet decompositions to 4 for both
38  * level 1 (VC-2) and 128 (long-gop default).
39  * 5 decompositions is the maximum before >16-bit buffers are needed.
40  * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
41  * the others to 4 decompositions (or 3 for the fidelity filter).
42  *
43  * We use this instead of MAX_DECOMPOSITIONS to save some memory.
44  */
45 #define MAX_DWT_LEVELS 5
46 
47 /**
48  * Parse code values:
49  *
50  * Dirac Specification ->
51  * 9.6.1 Table 9.1
52  *
53  * VC-2 Specification ->
54  * 10.4.1 Table 10.1
55  */
56 
73  DIRAC_PCODE_MAGIC = 0x42424344,
74 };
75 
76 typedef struct DiracVersionInfo {
77  int major;
78  int minor;
80 
81 typedef struct AVDiracSeqHeader {
82  unsigned width;
83  unsigned height;
84  uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
85 
88 
89  uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
90  uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
91 
92  uint16_t clean_width;
93  uint16_t clean_height;
96 
97  uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
98  uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
99 
100  int profile;
101  int level;
102 
105 
111 
115 
116 /**
117  * Parse a Dirac sequence header.
118  *
119  * @param dsh this function will allocate and fill an AVDiracSeqHeader struct
120  * and write it into this pointer. The caller must free it with
121  * av_free().
122  * @param buf the data buffer
123  * @param buf_size the size of the data buffer in bytes
124  * @param log_ctx if non-NULL, this function will log errors here
125  * @return 0 on success, a negative AVERROR code on failure
126  */
128  const uint8_t *buf, size_t buf_size,
129  void *log_ctx);
130 
131 #endif /* AVCODEC_DIRAC_H */
uint8_t interlaced
Definition: dirac.h:86
enum AVColorRange color_range
Definition: dirac.h:107
enum AVColorTransferCharacteristic color_trc
Definition: dirac.h:109
DiracVersionInfo version
Definition: dirac.h:112
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:404
uint8_t top_field_first
Definition: dirac.h:87
uint8_t
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:429
AVRational sample_aspect_ratio
Definition: dirac.h:104
AVColorRange
MPEG vs JPEG YUV range.
Definition: pixfmt.h:449
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:385
uint8_t pixel_range_index
index into dirac_pixel_range_presets[]
Definition: dirac.h:97
AVRational framerate
Definition: dirac.h:103
uint8_t chroma_format
0: 444 1: 422 2: 420
Definition: dirac.h:84
uint16_t clean_height
Definition: dirac.h:93
enum AVColorSpace colorspace
Definition: dirac.h:110
uint16_t clean_width
Definition: dirac.h:92
uint8_t color_spec_index
index into dirac_color_spec_presets[]
Definition: dirac.h:98
uint8_t frame_rate_index
index into dirac_frame_rate[]
Definition: dirac.h:89
Libavcodec external API header.
enum AVPixelFormat pix_fmt
Definition: dirac.h:106
uint16_t clean_right_offset
Definition: dirac.h:95
DiracParseCodes
Parse code values:
Definition: dirac.h:57
void * buf
Definition: avisynth_c.h:553
rational number numerator/denominator
Definition: rational.h:43
uint16_t clean_left_offset
Definition: dirac.h:94
unsigned height
Definition: dirac.h:83
uint8_t aspect_ratio_index
index into dirac_aspect_ratio[]
Definition: dirac.h:90
enum AVColorPrimaries color_primaries
Definition: dirac.h:108
int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh, const uint8_t *buf, size_t buf_size, void *log_ctx)
Parse a Dirac sequence header.
Definition: dirac.c:398
unsigned width
Definition: dirac.h:82
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60