2 Copyright (C) 2013 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 #include <libcxml/cxml.h>
21 #include "ffmpeg_content.h"
22 #include "ffmpeg_examiner.h"
23 #include "compose.hpp"
33 using std::stringstream;
37 using boost::shared_ptr;
38 using boost::lexical_cast;
40 int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
41 int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
42 int const FFmpegContentProperty::AUDIO_STREAMS = 102;
43 int const FFmpegContentProperty::AUDIO_STREAM = 103;
44 int const FFmpegContentProperty::FILTERS = 104;
46 FFmpegContent::FFmpegContent (shared_ptr<const Film> f, boost::filesystem::path p)
54 FFmpegContent::FFmpegContent (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
56 , VideoContent (f, node)
57 , AudioContent (f, node)
59 list<shared_ptr<cxml::Node> > c = node->node_children ("SubtitleStream");
60 for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
61 _subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (*i)));
62 if ((*i)->optional_number_child<int> ("Selected")) {
63 _subtitle_stream = _subtitle_streams.back ();
67 c = node->node_children ("AudioStream");
68 for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
69 _audio_streams.push_back (shared_ptr<FFmpegAudioStream> (new FFmpegAudioStream (*i)));
70 if ((*i)->optional_number_child<int> ("Selected")) {
71 _audio_stream = _audio_streams.back ();
75 c = node->node_children ("Filter");
76 for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
77 _filters.push_back (Filter::from_id ((*i)->content ()));
80 _first_video = node->optional_number_child<Time> ("FirstVideo");
83 FFmpegContent::FFmpegContent (FFmpegContent const & o)
87 , _subtitle_streams (o._subtitle_streams)
88 , _subtitle_stream (o._subtitle_stream)
89 , _audio_streams (o._audio_streams)
90 , _audio_stream (o._audio_stream)
96 FFmpegContent::as_xml (xmlpp::Node* node) const
98 node->add_child("Type")->add_child_text ("FFmpeg");
99 Content::as_xml (node);
100 VideoContent::as_xml (node);
101 AudioContent::as_xml (node);
103 boost::mutex::scoped_lock lm (_mutex);
105 for (vector<shared_ptr<FFmpegSubtitleStream> >::const_iterator i = _subtitle_streams.begin(); i != _subtitle_streams.end(); ++i) {
106 xmlpp::Node* t = node->add_child("SubtitleStream");
107 if (_subtitle_stream && *i == _subtitle_stream) {
108 t->add_child("Selected")->add_child_text("1");
113 for (vector<shared_ptr<FFmpegAudioStream> >::const_iterator i = _audio_streams.begin(); i != _audio_streams.end(); ++i) {
114 xmlpp::Node* t = node->add_child("AudioStream");
115 if (_audio_stream && *i == _audio_stream) {
116 t->add_child("Selected")->add_child_text("1");
121 for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
122 node->add_child("Filter")->add_child_text ((*i)->id ());
126 node->add_child("FirstVideo")->add_child_text (lexical_cast<string> (_first_video.get ()));
131 FFmpegContent::examine (shared_ptr<Job> job)
133 job->set_progress_unknown ();
135 Content::examine (job);
137 shared_ptr<const Film> film = _film.lock ();
140 shared_ptr<FFmpegExaminer> examiner (new FFmpegExaminer (shared_from_this ()));
142 ContentVideoFrame video_length = 0;
143 video_length = examiner->video_length ();
144 film->log()->log (String::compose ("Video length obtained from header as %1 frames", video_length));
147 boost::mutex::scoped_lock lm (_mutex);
149 _video_length = video_length;
151 _subtitle_streams = examiner->subtitle_streams ();
152 if (!_subtitle_streams.empty ()) {
153 _subtitle_stream = _subtitle_streams.front ();
156 _audio_streams = examiner->audio_streams ();
157 if (!_audio_streams.empty ()) {
158 _audio_stream = _audio_streams.front ();
161 _first_video = examiner->first_video ();
164 take_from_video_examiner (examiner);
166 signal_changed (ContentProperty::LENGTH);
167 signal_changed (FFmpegContentProperty::SUBTITLE_STREAMS);
168 signal_changed (FFmpegContentProperty::SUBTITLE_STREAM);
169 signal_changed (FFmpegContentProperty::AUDIO_STREAMS);
170 signal_changed (FFmpegContentProperty::AUDIO_STREAM);
171 signal_changed (AudioContentProperty::AUDIO_CHANNELS);
175 FFmpegContent::summary () const
177 return String::compose (_("Movie: %1"), file().filename().string());
181 FFmpegContent::information () const
183 if (video_length() == 0 || video_frame_rate() == 0) {
189 s << String::compose (_("%1 frames; %2 frames per second"), video_length(), video_frame_rate()) << "\n";
190 s << VideoContent::information ();
196 FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
199 boost::mutex::scoped_lock lm (_mutex);
200 _subtitle_stream = s;
203 signal_changed (FFmpegContentProperty::SUBTITLE_STREAM);
207 FFmpegContent::set_audio_stream (shared_ptr<FFmpegAudioStream> s)
210 boost::mutex::scoped_lock lm (_mutex);
214 signal_changed (FFmpegContentProperty::AUDIO_STREAM);
218 FFmpegContent::audio_length () const
220 int const cafr = content_audio_frame_rate ();
221 int const vfr = video_frame_rate ();
222 ContentVideoFrame const vl = video_length ();
224 boost::mutex::scoped_lock lm (_mutex);
225 if (!_audio_stream) {
229 return video_frames_to_audio_frames (vl, cafr, vfr);
233 FFmpegContent::audio_channels () const
235 boost::mutex::scoped_lock lm (_mutex);
237 if (!_audio_stream) {
241 return _audio_stream->channels;
245 FFmpegContent::content_audio_frame_rate () const
247 boost::mutex::scoped_lock lm (_mutex);
249 if (!_audio_stream) {
253 return _audio_stream->frame_rate;
257 FFmpegContent::output_audio_frame_rate () const
259 shared_ptr<const Film> film = _film.lock ();
262 /* Resample to a DCI-approved sample rate */
263 double t = dcp_audio_frame_rate (content_audio_frame_rate ());
265 FrameRateConversion frc (video_frame_rate(), film->dcp_video_frame_rate());
267 /* Compensate if the DCP is being run at a different frame rate
268 to the source; that is, if the video is run such that it will
269 look different in the DCP compared to the source (slower or faster).
270 skip/repeat doesn't come into effect here.
273 if (frc.change_speed) {
274 t *= video_frame_rate() * frc.factor() / film->dcp_video_frame_rate();
281 operator== (FFmpegSubtitleStream const & a, FFmpegSubtitleStream const & b)
287 operator== (FFmpegAudioStream const & a, FFmpegAudioStream const & b)
292 FFmpegAudioStream::FFmpegAudioStream (shared_ptr<const cxml::Node> node)
294 name = node->string_child ("Name");
295 id = node->number_child<int> ("Id");
296 frame_rate = node->number_child<int> ("FrameRate");
297 channels = node->number_child<int64_t> ("Channels");
298 mapping = AudioMapping (node->node_child ("Mapping"));
299 start = node->optional_number_child<Time> ("Start");
303 FFmpegAudioStream::as_xml (xmlpp::Node* root) const
305 root->add_child("Name")->add_child_text (name);
306 root->add_child("Id")->add_child_text (lexical_cast<string> (id));
307 root->add_child("FrameRate")->add_child_text (lexical_cast<string> (frame_rate));
308 root->add_child("Channels")->add_child_text (lexical_cast<string> (channels));
310 root->add_child("Start")->add_child_text (lexical_cast<string> (start));
312 mapping.as_xml (root->add_child("Mapping"));
315 /** Construct a SubtitleStream from a value returned from to_string().
316 * @param t String returned from to_string().
317 * @param v State file version.
319 FFmpegSubtitleStream::FFmpegSubtitleStream (shared_ptr<const cxml::Node> node)
321 name = node->string_child ("Name");
322 id = node->number_child<int> ("Id");
326 FFmpegSubtitleStream::as_xml (xmlpp::Node* root) const
328 root->add_child("Name")->add_child_text (name);
329 root->add_child("Id")->add_child_text (lexical_cast<string> (id));
333 FFmpegContent::clone () const
335 return shared_ptr<Content> (new FFmpegContent (*this));
339 FFmpegContent::length () const
341 shared_ptr<const Film> film = _film.lock ();
344 FrameRateConversion frc (video_frame_rate (), film->dcp_video_frame_rate ());
345 return video_length() * frc.factor() * TIME_HZ / film->dcp_video_frame_rate ();
349 FFmpegContent::audio_mapping () const
351 boost::mutex::scoped_lock lm (_mutex);
353 if (!_audio_stream) {
354 return AudioMapping ();
357 return _audio_stream->mapping;
361 FFmpegContent::set_filters (vector<Filter const *> const & filters)
364 boost::mutex::scoped_lock lm (_mutex);
368 signal_changed (FFmpegContentProperty::FILTERS);
372 FFmpegContent::set_audio_mapping (AudioMapping m)
374 audio_stream()->mapping = m;
375 signal_changed (AudioContentProperty::AUDIO_MAPPING);