1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//
// This file contains the C API of the encoder part of the libjpegli library,
// which is based on the C API of libjpeg, with the function names changed from
// jpeg_* to jpegli_*, while compressor object definitions are included directly
// from jpeglib.h
//
// Applications can use the libjpegli library in one of the following ways:
//
// (1) Include jpegli/encode.h and/or jpegli/decode.h, update the function
// names of the API and link against libjpegli.
//
// (2) Leave the application code unchanged, but replace the libjpeg.so library
// with the one built by this project that is API- and ABI-compatible with
// libjpeg-turbo's version of libjpeg.so.
#ifndef LIB_JPEGLI_ENCODE_H_
#define LIB_JPEGLI_ENCODE_H_
#include "lib/jpegli/common.h"
#include "lib/jpegli/types.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define jpegli_create_compress(cinfo) \
jpegli_CreateCompress((cinfo), JPEG_LIB_VERSION, \
(size_t)sizeof(struct jpeg_compress_struct))
void jpegli_CreateCompress(j_compress_ptr cinfo, int version,
size_t structsize);
void jpegli_stdio_dest(j_compress_ptr cinfo, FILE* outfile);
void jpegli_mem_dest(j_compress_ptr cinfo, unsigned char** outbuffer,
unsigned long* outsize /* NOLINT */);
void jpegli_set_defaults(j_compress_ptr cinfo);
void jpegli_default_colorspace(j_compress_ptr cinfo);
void jpegli_set_colorspace(j_compress_ptr cinfo, J_COLOR_SPACE colorspace);
void jpegli_set_quality(j_compress_ptr cinfo, int quality,
boolean force_baseline);
void jpegli_set_linear_quality(j_compress_ptr cinfo, int scale_factor,
boolean force_baseline);
#if JPEG_LIB_VERSION >= 70
void jpegli_default_qtables(j_compress_ptr cinfo, boolean force_baseline);
#endif
int jpegli_quality_scaling(int quality);
void jpegli_add_quant_table(j_compress_ptr cinfo, int which_tbl,
const unsigned int* basic_table, int scale_factor,
boolean force_baseline);
void jpegli_simple_progression(j_compress_ptr cinfo);
void jpegli_suppress_tables(j_compress_ptr cinfo, boolean suppress);
#if JPEG_LIB_VERSION >= 70
void jpegli_calc_jpeg_dimensions(j_compress_ptr cinfo);
#endif
void jpegli_copy_critical_parameters(j_decompress_ptr srcinfo,
j_compress_ptr dstinfo);
void jpegli_write_m_header(j_compress_ptr cinfo, int marker,
unsigned int datalen);
void jpegli_write_m_byte(j_compress_ptr cinfo, int val);
void jpegli_write_marker(j_compress_ptr cinfo, int marker,
const JOCTET* dataptr, unsigned int datalen);
void jpegli_write_icc_profile(j_compress_ptr cinfo, const JOCTET* icc_data_ptr,
unsigned int icc_data_len);
void jpegli_start_compress(j_compress_ptr cinfo, boolean write_all_tables);
void jpegli_write_tables(j_compress_ptr cinfo);
JDIMENSION jpegli_write_scanlines(j_compress_ptr cinfo, JSAMPARRAY scanlines,
JDIMENSION num_lines);
JDIMENSION jpegli_write_raw_data(j_compress_ptr cinfo, JSAMPIMAGE data,
JDIMENSION num_lines);
void jpegli_write_coefficients(j_compress_ptr cinfo,
jvirt_barray_ptr* coef_arrays);
void jpegli_finish_compress(j_compress_ptr cinfo);
void jpegli_abort_compress(j_compress_ptr cinfo);
void jpegli_destroy_compress(j_compress_ptr cinfo);
//
// New API functions that are not available in libjpeg
//
// NOTE: This part of the API is still experimental and will probably change in
// the future.
//
// Sets the butteraugli target distance for the compressor. This may override
// the default quantization table indexes based on jpeg colorspace, therefore
// it must be called after jpegli_set_defaults() or after the last
// jpegli_set_colorspace() or jpegli_default_colorspace() calls.
void jpegli_set_distance(j_compress_ptr cinfo, float distance,
boolean force_baseline);
// Returns the butteraugli target distance for the given quality parameter.
float jpegli_quality_to_distance(int quality);
// Enables distance parameter search to meet the given psnr target.
void jpegli_set_psnr(j_compress_ptr cinfo, float psnr, float tolerance,
float min_distance, float max_distance);
// Changes the default behaviour of the encoder in the selection of quantization
// matrices and chroma subsampling. Must be called before jpegli_set_defaults()
// because some default setting depend on the XYB mode.
void jpegli_set_xyb_mode(j_compress_ptr cinfo);
// Signals to the encoder that the pixel data that will be provided later
// through jpegli_write_scanlines() has this transfer function. This must be
// called before jpegli_set_defaults() because it changes the default
// quantization tables.
void jpegli_set_cicp_transfer_function(j_compress_ptr cinfo, int code);
void jpegli_set_input_format(j_compress_ptr cinfo, JpegliDataType data_type,
JpegliEndianness endianness);
// Sets whether or not the encoder uses adaptive quantization for creating more
// zero coefficients based on the local properties of the image.
// Enabled by default.
void jpegli_enable_adaptive_quantization(j_compress_ptr cinfo, boolean value);
// Sets the default progression parameters, where level 0 is sequential, and
// greater level value means more progression steps. Default is 2.
void jpegli_set_progressive_level(j_compress_ptr cinfo, int level);
// If this function is called before starting compression, the quality and
// linear quality parameters will be used to scale the standard quantization
// tables from Annex K of the JPEG standard. By default jpegli uses a different
// set of quantization tables and used different scaling parameters for DC and
// AC coefficients. Must be called before jpegli_set_defaults().
void jpegli_use_standard_quant_tables(j_compress_ptr cinfo);
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif
#endif // LIB_JPEGLI_ENCODE_H_
|
