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
|
/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/examine_content_job.cc
* @brief A class to run through content at high speed to find its length.
*/
#include <boost/filesystem.hpp>
#include "examine_content_job.h"
#include "options.h"
#include "decoder_factory.h"
#include "decoder.h"
#include "imagemagick_encoder.h"
#include "transcoder.h"
#include "log.h"
#include "film.h"
#include "video_decoder.h"
using std::string;
using std::vector;
using std::pair;
using boost::shared_ptr;
ExamineContentJob::ExamineContentJob (shared_ptr<Film> f, shared_ptr<Job> req)
: Job (f, req)
{
}
ExamineContentJob::~ExamineContentJob ()
{
}
string
ExamineContentJob::name () const
{
if (_film->name().empty ()) {
return "Examine content";
}
return String::compose ("Examine content of %1", _film->name());
}
void
ExamineContentJob::run ()
{
float progress_remaining = 1;
/* Set the film's length to either
a) a length judged by running through the content or
b) the length from a decoder's header.
*/
if (!_film->trust_content_header()) {
/* Decode the content to get an accurate length */
/* We don't want to use any existing length here, as progress
will be messed up.
*/
_film->unset_length ();
shared_ptr<Options> o (new Options ("", "", ""));
o->out_size = Size (512, 512);
o->apply_crop = false;
o->decode_audio = false;
descend (0.5);
pair<shared_ptr<VideoDecoder>, shared_ptr<AudioDecoder> > decoders = decoder_factory (_film, o, this);
set_progress_unknown ();
while (!decoders.first->pass()) {
/* keep going */
}
_film->set_length (decoders.first->video_frame());
_film->log()->log (String::compose ("Video length examined as %1 frames", _film->length().get()));
ascend ();
progress_remaining -= 0.5;
} else {
/* Get a quick decoder to get the content's length from its header.
It would have been nice to just use the thumbnail transcoder's decoder,
but that's a bit fiddly, and this isn't too expensive.
*/
shared_ptr<Options> o (new Options ("", "", ""));
o->out_size = Size (1024, 1024);
pair<shared_ptr<VideoDecoder>, shared_ptr<AudioDecoder> > d = decoder_factory (_film, o, 0);
_film->set_length (d.first->length());
_film->log()->log (String::compose ("Video length obtained from header as %1 frames", _film->length().get()));
}
/* Now make thumbnails for it */
descend (progress_remaining);
try {
shared_ptr<Options> o (new Options (_film->dir ("thumbs"), ".png", ""));
o->out_size = _film->size ();
o->apply_crop = false;
o->decode_audio = false;
o->decode_video_skip = _film->length().get() / 128;
o->decode_subtitles = true;
shared_ptr<ImageMagickEncoder> e (new ImageMagickEncoder (_film, o));
Transcoder w (_film, o, this, e);
w.go ();
/* Now set the film's length from the transcoder's decoder, since we
went to all the trouble of going through the content.
*/
_film->set_length (w.video_decoder()->video_frame());
} catch (std::exception& e) {
ascend ();
set_progress (1);
set_error (e.what ());
set_state (FINISHED_ERROR);
return;
}
string const tdir = _film->dir ("thumbs");
vector<SourceFrame> thumbs;
for (boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator (tdir); i != boost::filesystem::directory_iterator(); ++i) {
/* Aah, the sweet smell of progress */
#if BOOST_FILESYSTEM_VERSION == 3
string const l = boost::filesystem::path(*i).leaf().generic_string();
#else
string const l = i->leaf ();
#endif
size_t const d = l.find (".png");
size_t const t = l.find (".tmp");
if (d != string::npos && t == string::npos) {
thumbs.push_back (atoi (l.substr (0, d).c_str()));
}
}
sort (thumbs.begin(), thumbs.end());
_film->set_thumbs (thumbs);
ascend ();
set_progress (1);
set_state (FINISHED_OK);
}
|
