JeVois  1.21
JeVois Smart Embedded Machine Vision Toolkit
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Jpeg.C
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1// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2//
3// JeVois Smart Embedded Machine Vision Toolkit - Copyright (C) 2016 by Laurent Itti, the University of Southern
4// California (USC), and iLab at USC. See http://iLab.usc.edu and http://jevois.org for information about this project.
5//
6// This file is part of the JeVois Smart Embedded Machine Vision Toolkit. This program is free software; you can
7// redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
8// Foundation, version 2. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
10// License for more details. You should have received a copy of the GNU General Public License along with this program;
11// if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
12//
13// Contact information: Laurent Itti - 3641 Watt Way, HNB-07A - Los Angeles, CA 90089-2520 - USA.
14// Tel: +1 213 740 3527 - itti@pollux.usc.edu - http://iLab.usc.edu - http://jevois.org
15// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
16/*! \file */
17
18#include <jevois/Image/Jpeg.H>
19#include <turbojpeg.h>
20#include <stddef.h> // for size_t
21
22// ####################################################################################################
24{ itsCompressor = tjInitCompress(); }
25
26// ####################################################################################################
28{ tjDestroy(itsCompressor); }
29
30// ####################################################################################################
32{ return itsCompressor; }
33
34// ####################################################################################################
35void jevois::convertYUYVtoYUV422(unsigned char const * src, int width, int height, unsigned char * dst)
36{
37 size_t const sz = width * height;
38 unsigned char * uptr = dst + sz;
39 unsigned char * vptr = uptr + sz / 4;
40 size_t const sz2 = sz / 2;
41
42 for (size_t i = 0; i < sz2; ++i)
43 {
44 *dst++ = *src++;
45 *uptr++ = *src++;
46 *dst++ = *src++;
47 *vptr++ = *src++;
48 }
49}
50
51// ####################################################################################################
52unsigned long jevois::compressBGRtoJpeg(unsigned char const * src, int width, int height, unsigned char * dst,
53 int quality)
54{
55 unsigned long jpegsize = width * height * 2; // allocated output buffer size
56
57 tjhandle compressor = jevois::JpegCompressor::instance().compressor();
58
59 tjCompress2(compressor, const_cast<unsigned char *>(src), width, 0, height, TJPF_BGR,
60 &dst, &jpegsize, TJSAMP_422, quality, TJFLAG_FASTDCT);
61
62 return jpegsize;
63}
64
65// ####################################################################################################
66unsigned long jevois::compressRGBtoJpeg(unsigned char const * src, int width, int height, unsigned char * dst,
67 int quality)
68{
69 unsigned long jpegsize = width * height * 2; // allocated output buffer size
70
71 tjhandle compressor = jevois::JpegCompressor::instance().compressor();
72
73 tjCompress2(compressor, const_cast<unsigned char *>(src), width, 0, height, TJPF_RGB,
74 &dst, &jpegsize, TJSAMP_422, quality, TJFLAG_FASTDCT);
75
76 return jpegsize;
77}
78
79// ####################################################################################################
80unsigned long jevois::compressRGBAtoJpeg(unsigned char const * src, int width, int height, unsigned char * dst,
81 int quality)
82{
83 unsigned long jpegsize = width * height * 2; // allocated output buffer size
84
85 tjhandle compressor = jevois::JpegCompressor::instance().compressor();
86
87 tjCompress2(compressor, const_cast<unsigned char *>(src), width, 0, height, TJPF_RGBA,
88 &dst, &jpegsize, TJSAMP_422, quality, TJFLAG_FASTDCT);
89
90 return jpegsize;
91}
92
93// ####################################################################################################
94unsigned long jevois::compressGRAYtoJpeg(unsigned char const * src, int width, int height, unsigned char * dst,
95 int quality)
96{
97 unsigned long jpegsize = width * height * 2; // allocated output buffer size
98
99 tjhandle compressor = jevois::JpegCompressor::instance().compressor();
100
101 tjCompress2(compressor, const_cast<unsigned char *>(src), width, 0, height, TJPF_GRAY,
102 &dst, &jpegsize, TJSAMP_422, quality, TJFLAG_FASTDCT);
103
104 return jpegsize;
105}
106
107// ####################################################################################################
108void jevois::compressBGRtoJpeg(cv::Mat const & src, RawImage & dst, int quality)
109{
110 dst.buf->setBytesUsed(jevois::compressBGRtoJpeg(src.data, src.cols, src.rows, dst.pixelsw<unsigned char>(), quality));
111}
112
113// ####################################################################################################
114void jevois::compressRGBtoJpeg(cv::Mat const & src, RawImage & dst, int quality)
115{
116 dst.buf->setBytesUsed(jevois::compressRGBtoJpeg(src.data, src.cols, src.rows, dst.pixelsw<unsigned char>(), quality));
117}
118
119// ####################################################################################################
120void jevois::compressRGBAtoJpeg(cv::Mat const & src, RawImage & dst, int quality)
121{
122 dst.buf->setBytesUsed(jevois::compressRGBAtoJpeg(src.data, src.cols,src.rows, dst.pixelsw<unsigned char>(), quality));
123}
124
125// ####################################################################################################
126void jevois::compressGRAYtoJpeg(cv::Mat const & src, RawImage & dst, int quality)
127{
128 dst.buf->setBytesUsed(jevois::compressGRAYtoJpeg(src.data, src.cols,src.rows, dst.pixelsw<unsigned char>(), quality));
129}
void * compressor()
Access the compressor handle.
Definition Jpeg.C:31
virtual ~JpegCompressor()
Destructor, frees the turbojpeg object.
Definition Jpeg.C:27
JpegCompressor()
Constructor, create the turbojpeg object.
Definition Jpeg.C:23
A raw image as coming from a V4L2 Camera and/or being sent out to a USB Gadget.
Definition RawImage.H:111
T * pixelsw()
Shortcut access to pixels, read-write.
std::shared_ptr< VideoBuf > buf
The pixel data buffer.
Definition RawImage.H:149
static JpegCompressor & instance()
Get the global, unique instance of the class T.
unsigned long compressGRAYtoJpeg(unsigned char const *src, int width, int height, unsigned char *dst, int quality=75)
Compress raw pixel buffer to jpeg.
Definition Jpeg.C:94
unsigned long compressBGRtoJpeg(unsigned char const *src, int width, int height, unsigned char *dst, int quality=75)
Compress raw pixel buffer to jpeg.
Definition Jpeg.C:52
unsigned long compressRGBAtoJpeg(unsigned char const *src, int width, int height, unsigned char *dst, int quality=75)
Compress raw pixel buffer to jpeg.
Definition Jpeg.C:80
void convertYUYVtoYUV422(unsigned char const *src, int width, int height, unsigned char *dst)
Helper to convert from packed YUYV to planar YUV422.
Definition Jpeg.C:35
unsigned long compressRGBtoJpeg(unsigned char const *src, int width, int height, unsigned char *dst, int quality=75)
Compress raw pixel buffer to jpeg.
Definition Jpeg.C:66