src/lib/transcode_job.cc

   1 /*
   2     Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 /** @file src/transcode_job.cc
  22  *  @brief A job which transcodes from one format to another.
  23  */
  24
  25 #include "transcode_job.h"
  26 #include "upload_job.h"
  27 #include "job_manager.h"
  28 #include "film.h"
  29 #include "transcoder.h"
  30 #include "log.h"
  31 #include "compose.hpp"
  32 #include <iostream>
  33 #include <iomanip>
  34
  35 #include "i18n.h"
  36
  37 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
  38 #define LOG_GENERAL_NC(...) _film->log()->log (__VA_ARGS__, LogEntry::TYPE_GENERAL);
  39 #define LOG_ERROR_NC(...)   _film->log()->log (__VA_ARGS__, LogEntry::TYPE_ERROR);
  40
  41 using std::string;
  42 using std::fixed;
  43 using std::setprecision;
  44 using std::cout;
  45 using boost::shared_ptr;
  46
  47 /** @param film Film to use */
  48 TranscodeJob::TranscodeJob (shared_ptr<const Film> film)
  49         : Job (film)
  50 {
  51
  52 }
  53
  54 string
  55 TranscodeJob::name () const
  56 {
  57         return String::compose (_("Transcode %1"), _film->name());
  58 }
  59
  60 string
  61 TranscodeJob::json_name () const
  62 {
  63         return N_("transcode");
  64 }
  65
  66 void
  67 TranscodeJob::run ()
  68 {
  69         try {
  70                 struct timeval start;
  71                 gettimeofday (&start, 0);
  72                 LOG_GENERAL_NC (N_("Transcode job starting"));
  73
  74                 _transcoder.reset (new Transcoder (_film, shared_from_this ()));
  75                 _transcoder->go ();
  76                 set_progress (1);
  77                 set_state (FINISHED_OK);
  78
  79                 struct timeval finish;
  80                 gettimeofday (&finish, 0);
  81
  82                 float fps = 0;
  83                 if (finish.tv_sec != start.tv_sec) {
  84                         fps = _transcoder->video_frames_enqueued() / (finish.tv_sec - start.tv_sec);
  85                 }
  86
  87                 LOG_GENERAL (N_("Transcode job completed successfully: %1 fps"), fps);
  88                 _transcoder.reset ();
  89
  90                 if (_film->upload_after_make_dcp ()) {
  91                         shared_ptr<Job> job (new UploadJob (_film));
  92                         JobManager::instance()->add (job);
  93                 }
  94
  95         } catch (...) {
  96                 _transcoder.reset ();
  97                 throw;
  98         }
  99 }
 100
 101 string
 102 TranscodeJob::status () const
 103 {
 104         if (!_transcoder) {
 105                 return Job::status ();
 106         }
 107
 108
 109         char buffer[256];
 110         if (finished() || _transcoder->finishing()) {
 111                 strncpy (buffer, Job::status().c_str(), 256);
 112         } else {
 113                 snprintf (
 114                         buffer, sizeof(buffer), "%s; %d/%" PRId64 " frames",
 115                         Job::status().c_str(),
 116                         _transcoder->video_frames_enqueued(),
 117                         _film->length().frames_round (_film->video_frame_rate ())
 118                         );
 119
 120                 float const fps = _transcoder->current_encoding_rate ();
 121                 if (fps) {
 122                         char fps_buffer[64];
 123                         /// TRANSLATORS: fps here is an abbreviation for frames per second
 124                         snprintf (fps_buffer, sizeof(fps_buffer), _("; %.1f fps"), fps);
 125                         strncat (buffer, fps_buffer, strlen(buffer) - 1);
 126                 }
 127         }
 128
 129         return buffer;
 130 }
 131
 132 /** @return Approximate remaining time in seconds */
 133 int
 134 TranscodeJob::remaining_time () const
 135 {
 136         /* _transcoder might be destroyed by the job-runner thread */
 137         shared_ptr<Transcoder> t = _transcoder;
 138
 139         if (!t || t->finishing()) {
 140                 /* We aren't doing any actual encoding so just use the job's guess */
 141                 return Job::remaining_time ();
 142         }
 143
 144         /* We're encoding so guess based on the current encoding rate */
 145
 146         float fps = t->current_encoding_rate ();
 147
 148         if (fps == 0) {
 149                 return 0;
 150         }
 151
 152         /* Compute approximate proposed length here, as it's only here that we need it */
 153         return (_film->length().frames_round (_film->video_frame_rate ()) - t->video_frames_enqueued()) / fps;
 154 }