2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/examine_content_job.cc
21 * @brief A class to run through content at high speed to find its length.
24 #include <boost/filesystem.hpp>
25 #include "examine_content_job.h"
27 #include "decoder_factory.h"
29 #include "imagemagick_encoder.h"
30 #include "transcoder.h"
33 #include "video_decoder.h"
38 using boost::shared_ptr;
40 ExamineContentJob::ExamineContentJob (shared_ptr<Film> f, shared_ptr<Job> req)
46 ExamineContentJob::~ExamineContentJob ()
51 ExamineContentJob::name () const
53 if (_film->name().empty ()) {
54 return "Examine content";
57 return String::compose ("Examine content of %1", _film->name());
61 ExamineContentJob::run ()
63 float progress_remaining = 1;
65 /* Set the film's length to either
66 a) a length judged by running through the content or
67 b) the length from a decoder's header.
70 if (!_film->trust_content_header()) {
71 /* Decode the content to get an accurate length */
73 /* We don't want to use any existing length here, as progress
76 _film->unset_length ();
78 shared_ptr<Options> o (new Options ("", "", ""));
79 o->out_size = Size (512, 512);
80 o->apply_crop = false;
81 o->decode_audio = false;
85 pair<shared_ptr<VideoDecoder>, shared_ptr<AudioDecoder> > decoders = decoder_factory (_film, o, this);
87 set_progress_unknown ();
88 while (!decoders.first->pass()) {
92 _film->set_length (decoders.first->video_frame());
94 _film->log()->log (String::compose ("Video length examined as %1 frames", _film->length().get()));
98 progress_remaining -= 0.5;
102 /* Get a quick decoder to get the content's length from its header.
103 It would have been nice to just use the thumbnail transcoder's decoder,
104 but that's a bit fiddly, and this isn't too expensive.
107 shared_ptr<Options> o (new Options ("", "", ""));
108 o->out_size = Size (1024, 1024);
109 pair<shared_ptr<VideoDecoder>, shared_ptr<AudioDecoder> > d = decoder_factory (_film, o, 0);
110 _film->set_length (d.first->length());
112 _film->log()->log (String::compose ("Video length obtained from header as %1 frames", _film->length().get()));
115 /* Now make thumbnails for it */
117 descend (progress_remaining);
120 shared_ptr<Options> o (new Options (_film->dir ("thumbs"), ".png", ""));
121 o->out_size = _film->size ();
122 o->apply_crop = false;
123 o->decode_audio = false;
124 o->decode_video_skip = _film->length().get() / 128;
125 o->decode_subtitles = true;
126 shared_ptr<ImageMagickEncoder> e (new ImageMagickEncoder (_film, o));
127 Transcoder w (_film, o, this, e);
130 /* Now set the film's length from the transcoder's decoder, since we
131 went to all the trouble of going through the content.
134 _film->set_length (w.video_decoder()->video_frame());
136 } catch (std::exception& e) {
140 set_error (e.what ());
141 set_state (FINISHED_ERROR);
146 string const tdir = _film->dir ("thumbs");
147 vector<SourceFrame> thumbs;
149 for (boost::filesystem::directory_iterator i = boost::filesystem::directory_iterator (tdir); i != boost::filesystem::directory_iterator(); ++i) {
151 /* Aah, the sweet smell of progress */
152 #if BOOST_FILESYSTEM_VERSION == 3
153 string const l = boost::filesystem::path(*i).leaf().generic_string();
155 string const l = i->leaf ();
158 size_t const d = l.find (".png");
159 size_t const t = l.find (".tmp");
160 if (d != string::npos && t == string::npos) {
161 thumbs.push_back (atoi (l.substr (0, d).c_str()));
165 sort (thumbs.begin(), thumbs.end());
166 _film->set_thumbs (thumbs);
170 set_state (FINISHED_OK);