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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* img_encoder.cc
*
* Mon Nov 15 19:45:07 CET 2004
* Copyright 2004 Bent Bisballe
* deva@aasimon.org
****************************************************************************/
/*
* Originally from:
* RTVideoRec Realtime video recoder and encoder for Linux
*
* Copyright (C) 2004 B. Stultiens
* Copyright (C) 2004 Koen Otter and Glenn van der Meyden
*/
/*
* This file is part of MIaV.
*
* MIaV 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.
*
* MIaV 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 MIaV; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/*
* $Id$
*/
/*
* $Log$
* Revision 1.9 2005/05/26 12:48:36 deva
* *** empty log message ***
*
* Revision 1.8 2005/05/07 10:25:34 deva
*
* Removed ffmpeg code from img_encoder and corrected decoding errors in mov_encoder
*
* Revision 1.7 2005/05/03 08:31:59 deva
* Removed the error object, and replaced it with a more generic info object.
*
* Revision 1.6 2005/05/01 09:56:26 deva
* Added Id and Log tags to all files
*/
#include "img_encoder.h"
#include <stdio.h>
#include "debug.h"
// Use libdv
#include <libdv/dv.h>
#include <libdv/dv_types.h>
ImgEncoder::ImgEncoder()
{
}
ImgEncoder::~ImgEncoder()
{
}
void ImgEncoder::encode(Frame *dvframe,
char *filename,
int quality)
{
// Append suffix..
char fname[256];
sprintf(fname, "%s.jpg", filename);
unsigned char rgb[720*576*4];
getRGB(dvframe, rgb);
writeJPEGFile(fname, quality, (JSAMPLE*)rgb, 720, 576);
}
///////////////////////////////////////////////////////////////////////////////////////////
void ImgEncoder::writeJPEGFile(char *filename,
int quality,
JSAMPLE * image_buffer, // Points to large array of R,G,B-order data
int image_width, // Number of columns in image
int image_height // Number of rows in image
)
{
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE * outfile; // target file
JSAMPROW row_pointer[1]; // pointer to JSAMPLE row[s]
int row_stride; // physical row width in image buffer
// Step 1: allocate and initialize JPEG compression object
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
// Step 2: specify data destination (eg, a file)
if ((outfile = fopen(filename, "wb")) == NULL) {
fprintf(stderr, "can't open %s\n", filename);
exit(1);
}
jpeg_stdio_dest(&cinfo, outfile);
// Step 3: set parameters for compression
cinfo.image_width = image_width; // image width and height, in pixels
cinfo.image_height = image_height;
cinfo.input_components = 3; // # of color components per pixel
//typedef enum {
// JCS_UNKNOWN, // error/unspecified
// JCS_GRAYSCALE, // monochrome
// JCS_RGB, // red/green/blue
// JCS_YCbCr, // Y/Cb/Cr (also known as YUV)
// JCS_CMYK, // C/M/Y/K
// JCS_YCCK // Y/Cb/Cr/K
//} J_COLOR_SPACE;
cinfo.in_color_space = JCS_RGB; // colorspace of input image
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE); // limit to baseline-JPEG values
// Step 4: Start compressor
jpeg_start_compress(&cinfo, TRUE);
// Step 5: while (scan lines remain to be written)
row_stride = image_width * 3; // JSAMPLEs per row in image_buffer
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
(void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
// Step 6: Finish compression
jpeg_finish_compress(&cinfo);
fclose(outfile);
// Step 7: release JPEG compression object
jpeg_destroy_compress(&cinfo);
}
void ImgEncoder::getRGB(Frame *frame, unsigned char *rgb)
{
unsigned char *pixels[3];
int pitches[3];
pixels[ 0 ] = rgb;
pixels[ 1 ] = NULL;
pixels[ 2 ] = NULL;
pitches[ 0 ] = 720 * 3;
pitches[ 1 ] = 0;
pitches[ 2 ] = 0;
dv_decoder_t *decoder = dv_decoder_new(FALSE/*this value is unused*/, FALSE, FALSE);
decoder->quality = DV_QUALITY_BEST;
dv_parse_header(decoder, frame->data);
decoder->system = e_dv_system_625_50; // PAL lines, PAL framerate
decoder->sampling = e_dv_sample_422; // 4 bytes y, 2 bytes u, 2 bytes v
decoder->std = e_dv_std_iec_61834;
decoder->num_dif_seqs = 12;
// libdv img decode to rgb
dv_decode_full_frame(decoder,
frame->data,
e_dv_color_rgb,
pixels,
pitches);
dv_decoder_free(decoder);
}
|
