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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* OMAP3 ISP snapshot test application
*
* Copyright (C) 2012 Ideas on board SPRL
*
* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define _BSD_SOURCE
#include <errno.h>
#include <setjmp.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <jpeglib.h>
#include "isp/tools.h"
#include "isp/v4l2-pool.h"
#include "jpeg.h"
struct jpeg {
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr error;
unsigned int width;
unsigned int height;
uint8_t *buffer;
jmp_buf jump;
};
static void jpeg_error_exit(j_common_ptr cinfo)
{
struct jpeg *jpeg = container_of(cinfo, struct jpeg, cinfo);
longjmp(jpeg->jump, 1);
}
int jpeg_save(struct jpeg *jpeg, FILE *file, struct v4l2_video_buffer *buffer)
{
JSAMPROW rows_y[DCTSIZE];
JSAMPROW rows_u[DCTSIZE];
JSAMPROW rows_v[DCTSIZE];
JSAMPARRAY image[3];
unsigned int width;
unsigned int height;
uint8_t *planes[3];
unsigned int x;
unsigned int y;
uint8_t *mem;
unsigned int i;
/* Convert the YUYV input buffer to a planar format for JPEG
* compression.
*/
width = (jpeg->width + 2 * DCTSIZE - 1) / (2 * DCTSIZE) * (2 * DCTSIZE);
height = (jpeg->height + DCTSIZE - 1) / DCTSIZE * DCTSIZE;
planes[0] = jpeg->buffer;
planes[1] = jpeg->buffer + width * height;
planes[2] = jpeg->buffer + 3 * width / 2 * height;
mem = buffer->mem;
for (y = 0; y < jpeg->height; ++y) {
for (x = 0; x < jpeg->width; x += 2) {
planes[0][x] = *mem++;
planes[1][x/2] = *mem++;
planes[0][x+1] = *mem++;
planes[2][x/2] = *mem++;
}
planes[0] += width;
planes[1] += width / 2;
planes[2] += width / 2;
}
/* Now perform JPEG compression. */
if (setjmp(jpeg->jump))
return -EIO;
jpeg_stdio_dest(&jpeg->cinfo, file);
jpeg_start_compress(&jpeg->cinfo, TRUE);
rows_y[0] = jpeg->buffer;
rows_u[0] = jpeg->buffer + width * height;
rows_v[0] = jpeg->buffer + 3 * width / 2 * height;
for (i = 1; i < DCTSIZE; ++i) {
rows_y[i] = rows_y[i-1] + width;
rows_u[i] = rows_u[i-1] + width / 2;
rows_v[i] = rows_v[i-1] + width / 2;
}
image[0] = rows_y;
image[1] = rows_u;
image[2] = rows_v;
while (jpeg->cinfo.next_scanline < jpeg->height) {
unsigned int written;
written = jpeg_write_raw_data(&jpeg->cinfo, image, DCTSIZE);
for (i = 0; i < DCTSIZE; ++i) {
rows_y[i] += width * written;
rows_u[i] += width / 2 * written;
rows_v[i] += width / 2 * written;
}
}
jpeg_finish_compress(&jpeg->cinfo);
return 0;
}
static int jpeg_init_compressor(struct jpeg *jpeg)
{
jpeg->cinfo.err = jpeg_std_error(&jpeg->error);
jpeg->error.error_exit = jpeg_error_exit;
if (setjmp(jpeg->jump)) {
jpeg_destroy_compress(&jpeg->cinfo);
jpeg->cinfo.err = NULL;
printf("Unable to create JPEG compression handler.\n");
return -EIO;
}
jpeg_create_compress(&jpeg->cinfo);
jpeg->cinfo.image_width = jpeg->width;
jpeg->cinfo.image_height = jpeg->height;
jpeg->cinfo.input_components = 3;
jpeg->cinfo.in_color_space = JCS_YCbCr;
jpeg_set_defaults(&jpeg->cinfo);
jpeg_set_quality(&jpeg->cinfo, 80, TRUE);
jpeg->cinfo.raw_data_in = TRUE;
jpeg_set_colorspace(&jpeg->cinfo, JCS_YCbCr);
jpeg->cinfo.comp_info[0].h_samp_factor = 2;
jpeg->cinfo.comp_info[0].v_samp_factor = 1;
jpeg->cinfo.comp_info[1].h_samp_factor = 1;
jpeg->cinfo.comp_info[1].v_samp_factor = 1;
jpeg->cinfo.comp_info[2].h_samp_factor = 1;
jpeg->cinfo.comp_info[2].v_samp_factor = 1;
return 0;
}
struct jpeg *jpeg_init(const struct v4l2_mbus_framefmt *format)
{
unsigned int width;
unsigned int height;
struct jpeg *jpeg;
jpeg = malloc(sizeof *jpeg);
if (jpeg == NULL)
return NULL;
memset(jpeg, 0, sizeof *jpeg);
jpeg->width = format->width;
jpeg->height = format->height;
if (jpeg_init_compressor(jpeg) < 0) {
free(jpeg);
return NULL;
}
/* Allocate a temporary buffer to hold the planar YUV image.
*
* All planes must be padded to the DCT block size horizontally
* and vertically. The luma plane must thus be padded to twice
* the DCT block size horizontally as the chroma planes are
* subsampled by 2 in the horizontal direction. For simplicity,
* pad all planes to twice the DCT block size horizontally.
*/
width = (format->width + 2 * DCTSIZE - 1) / (2 * DCTSIZE) * (2 * DCTSIZE);
height = (format->height + DCTSIZE - 1) / DCTSIZE * DCTSIZE;
jpeg->buffer = malloc(width * height * 2);
if (jpeg->buffer == NULL) {
jpeg_destroy_compress(&jpeg->cinfo);
jpeg->cinfo.err = NULL;
free(jpeg);
printf("Unable to allocate memory for JPEG compressor.\n");
return NULL;
}
return jpeg;
}
void jpeg_cleanup(struct jpeg *jpeg)
{
if (jpeg->cinfo.err != NULL) {
jpeg_destroy_compress(&jpeg->cinfo);
jpeg->cinfo.err = NULL;
}
free(jpeg->buffer);
free(jpeg);
}
|
