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
|
/*
* filter_fps.c
*
* Copyright 2003, 2004 Christopher Cramer
*
* This file is part of transcode, a video stream processing tool
*
* transcode 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, or (at your option)
* any later version.
*
* transcode 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 transcode; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#define MOD_NAME "filter_fps.so"
#define MOD_VERSION "v1.1 (2004-05-01)"
#define MOD_CAP "convert video frame rate, gets defaults from -f and --export_fps"
#define MOD_AUTHOR "Christopher Cramer"
#include "transcode.h"
#include "filter.h"
#include "libtc/libtc.h"
#include "libtc/optstr.h"
static int
parse_options(char *options, int *pre, double *infps, double *outfps)
{
char *p, *pbase, *q, *r;
size_t len;
vob_t *vob;
int default_pre, i;
/* defaults from -f and --export_fps */
vob = tc_get_vob();
if (!vob) return -1;
*infps = vob->fps;
*outfps = vob->ex_fps;
default_pre = 1;
if (!options || !*options) return 0;
if (!strcmp(options, "help")) {
tc_log_info(MOD_NAME, "(%s) help\n"
"This filter converts the video frame rate, by repeating or dropping frames.\n"
"options: <input fps>:<output fps>\n"
"example: -J fps=25:29.97 will convert from PAL to NTSC\n"
"In addition to the frame rate options, you may also specify pre or post.\n"
"If no rate options are given, defaults or -f/--export_fps/--export_frc will\n"
"be used.\n"
"If no pre or post options are given, decreasing rates will preprocess and\n"
"increasing rates will postprocess.\n"
, MOD_CAP);
return -1;
}
len = strlen(options);
p = pbase = malloc(len + 1);
ac_memcpy(p, options, len);
p[len] = '\0';
i = 0;
do {
q = memchr(p, ':', len);
if (q) *q++ = '\0';
if (!strcmp(p, "pre")) {
*pre = 1;
default_pre = 0;
} else if (!strncmp(p, "pre=", 4) && *(p + 4)) {
*pre = strtol(p + 4, &r, 0);
if (r == p) return -1;
default_pre = 0;
} else if (!strcmp(p, "post")) {
*pre = 0;
default_pre = 0;
} else if (!strncmp(p, "post=", 5) && *(p + 5)) {
*pre = !strtol(p + 4, &r, 0);
if (r == p) return -1;
default_pre = 0;
} else {
if (i == 0) {
*infps = strtod(p, &r);
if (r == p) return -1;
} else if (i == 1) {
*outfps = strtod(p, &r);
if (r == p) return -1;
} else return -1;
i++;
}
} while (q && (p = q));
free(pbase);
if (default_pre) {
if (*infps > *outfps) *pre = 1;
else if (*infps < *outfps) *pre = 0;
}
return 0;
}
int
tc_filter(frame_list_t *ptr_, char *options)
{
vframe_list_t *ptr = (vframe_list_t *)ptr_;
static double infps, outfps;
static unsigned long framesin = 0, framesout = 0;
static int pre = 0;
if(ptr->tag & TC_FILTER_GET_CONFIG) {
optstr_filter_desc (options, MOD_NAME, MOD_CAP, MOD_VERSION,
"Christopher Cramer", "VRYEO", "1");
return 0;
}
if(ptr->tag & TC_FILTER_INIT) {
if (verbose) tc_log_info(MOD_NAME, "%s %s",
MOD_VERSION, MOD_CAP);
if (parse_options(options, &pre, &infps, &outfps) == -1)
return -1;
if (verbose && options) tc_log_info(MOD_NAME, "options=%s",
options);
if (verbose && !options) tc_log_info(MOD_NAME, "no options");
if (verbose) tc_log_info(MOD_NAME, "converting from %g fps to %g fps,"
" %sprocessing", infps, outfps, pre ? "pre" : "post");
return 0;
}
if (ptr->tag & TC_VIDEO && ((pre && ptr->tag & TC_PRE_S_PROCESS)
|| (!pre && ptr->tag & TC_POST_S_PROCESS))) {
if (infps > outfps) {
if ((double)++framesin / infps >
(double)framesout / outfps)
framesout++;
else ptr->attributes |= TC_FRAME_IS_SKIPPED;
return 0;
} else if (infps < outfps) {
if (!(ptr->attributes & TC_FRAME_WAS_CLONED))
framesin++;
if ((double)framesin / infps >
(double)++framesout / outfps)
ptr->attributes |= TC_FRAME_IS_CLONED;
}
}
return 0;
}
|
