1 files changed, 407 insertions, 0 deletions
diff --git a/src/lib/ffmpeg_content.cc b/src/lib/ffmpeg_content.cc
new file mode 100644
index 000000000..de967c045
--- /dev/null
+++ b/src/lib/ffmpeg_content.cc
@@ -0,0 +1,407 @@
+/*
+    Copyright (C) 2013 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.
+
+*/
+
+#include <libcxml/cxml.h>
+#include "ffmpeg_content.h"
+#include "ffmpeg_examiner.h"
+#include "compose.hpp"
+#include "job.h"
+#include "util.h"
+#include "filter.h"
+#include "film.h"
+#include "log.h"
+
+#include "i18n.h"
+
+using std::string;
+using std::stringstream;
+using std::vector;
+using std::list;
+using std::cout;
+using std::pair;
+using boost::shared_ptr;
+using boost::lexical_cast;
+
+int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
+int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
+int const FFmpegContentProperty::AUDIO_STREAMS = 102;
+int const FFmpegContentProperty::AUDIO_STREAM = 103;
+int const FFmpegContentProperty::FILTERS = 104;
+
+FFmpegContent::FFmpegContent (shared_ptr<const Film> f, boost::filesystem::path p)
+	: Content (f, p)
+	, VideoContent (f, p)
+	, AudioContent (f, p)
+	, SubtitleContent (f, p)
+{
+
+}
+
+FFmpegContent::FFmpegContent (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
+	: Content (f, node)
+	, VideoContent (f, node)
+	, AudioContent (f, node)
+	, SubtitleContent (f, node)
+{
+	list<shared_ptr<cxml::Node> > c = node->node_children ("SubtitleStream");
+	for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
+		_subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (*i)));
+		if ((*i)->optional_number_child<int> ("Selected")) {
+			_subtitle_stream = _subtitle_streams.back ();
+		}
+	}
+
+	c = node->node_children ("AudioStream");
+	for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
+		_audio_streams.push_back (shared_ptr<FFmpegAudioStream> (new FFmpegAudioStream (*i)));
+		if ((*i)->optional_number_child<int> ("Selected")) {
+			_audio_stream = _audio_streams.back ();
+		}
+	}
+
+	c = node->node_children ("Filter");
+	for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
+		_filters.push_back (Filter::from_id ((*i)->content ()));
+	}
+
+	_first_video = node->optional_number_child<double> ("FirstVideo");
+}
+
+void
+FFmpegContent::as_xml (xmlpp::Node* node) const
+{
+	node->add_child("Type")->add_child_text ("FFmpeg");
+	Content::as_xml (node);
+	VideoContent::as_xml (node);
+	AudioContent::as_xml (node);
+	SubtitleContent::as_xml (node);
+
+	boost::mutex::scoped_lock lm (_mutex);
+
+	for (vector<shared_ptr<FFmpegSubtitleStream> >::const_iterator i = _subtitle_streams.begin(); i != _subtitle_streams.end(); ++i) {
+		xmlpp::Node* t = node->add_child("SubtitleStream");
+		if (_subtitle_stream && *i == _subtitle_stream) {
+			t->add_child("Selected")->add_child_text("1");
+		}
+		(*i)->as_xml (t);
+	}
+
+	for (vector<shared_ptr<FFmpegAudioStream> >::const_iterator i = _audio_streams.begin(); i != _audio_streams.end(); ++i) {
+		xmlpp::Node* t = node->add_child("AudioStream");
+		if (_audio_stream && *i == _audio_stream) {
+			t->add_child("Selected")->add_child_text("1");
+		}
+		(*i)->as_xml (t);
+	}
+
+	for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
+		node->add_child("Filter")->add_child_text ((*i)->id ());
+	}
+
+	if (_first_video) {
+		node->add_child("FirstVideo")->add_child_text (lexical_cast<string> (_first_video.get ()));
+	}
+}
+
+void
+FFmpegContent::examine (shared_ptr<Job> job)
+{
+	job->set_progress_unknown ();
+
+	Content::examine (job);
+
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+
+	shared_ptr<FFmpegExaminer> examiner (new FFmpegExaminer (shared_from_this ()));
+
+	VideoContent::Frame video_length = 0;
+	video_length = examiner->video_length ();
+	film->log()->log (String::compose ("Video length obtained from header as %1 frames", video_length));
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+
+		_video_length = video_length;
+
+		_subtitle_streams = examiner->subtitle_streams ();
+		if (!_subtitle_streams.empty ()) {
+			_subtitle_stream = _subtitle_streams.front ();
+		}
+		
+		_audio_streams = examiner->audio_streams ();
+		if (!_audio_streams.empty ()) {
+			_audio_stream = _audio_streams.front ();
+		}
+
+		_first_video = examiner->first_video ();
+	}
+
+	take_from_video_examiner (examiner);
+
+	signal_changed (ContentProperty::LENGTH);
+	signal_changed (FFmpegContentProperty::SUBTITLE_STREAMS);
+	signal_changed (FFmpegContentProperty::SUBTITLE_STREAM);
+	signal_changed (FFmpegContentProperty::AUDIO_STREAMS);
+	signal_changed (FFmpegContentProperty::AUDIO_STREAM);
+	signal_changed (AudioContentProperty::AUDIO_CHANNELS);
+}
+
+string
+FFmpegContent::summary () const
+{
+	/* Get the string() here so that the name does not have quotes around it */
+	return String::compose (_("%1 [movie]"), path().filename().string());
+}
+
+string
+FFmpegContent::technical_summary () const
+{
+	string as = "none";
+	if (_audio_stream) {
+		as = String::compose ("id %1", _audio_stream->id);
+	}
+
+	string ss = "none";
+	if (_subtitle_stream) {
+		ss = String::compose ("id %1", _subtitle_stream->id);
+	}
+
+	pair<string, string> filt = Filter::ffmpeg_strings (_filters);
+	
+	return Content::technical_summary() + " - "
+		+ VideoContent::technical_summary() + " - "
+		+ AudioContent::technical_summary() + " - "
+		+ String::compose (
+			"ffmpeg: audio %1, subtitle %2, filters %3 %4", as, ss, filt.first, filt.second
+			);
+}
+
+string
+FFmpegContent::information () const
+{
+	if (video_length() == 0 || video_frame_rate() == 0) {
+		return "";
+	}
+	
+	stringstream s;
+	
+	s << String::compose (_("%1 frames; %2 frames per second"), video_length(), video_frame_rate()) << "\n";
+	s << VideoContent::information ();
+
+	return s.str ();
+}
+
+void
+FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_subtitle_stream = s;
+	}
+
+	signal_changed (FFmpegContentProperty::SUBTITLE_STREAM);
+}
+
+void
+FFmpegContent::set_audio_stream (shared_ptr<FFmpegAudioStream> s)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_audio_stream = s;
+	}
+
+	signal_changed (FFmpegContentProperty::AUDIO_STREAM);
+}
+
+AudioContent::Frame
+FFmpegContent::audio_length () const
+{
+	int const cafr = content_audio_frame_rate ();
+	int const vfr  = video_frame_rate ();
+	VideoContent::Frame const vl = video_length ();
+
+	boost::mutex::scoped_lock lm (_mutex);
+	if (!_audio_stream) {
+		return 0;
+	}
+	
+	return video_frames_to_audio_frames (vl, cafr, vfr);
+}
+
+int
+FFmpegContent::audio_channels () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	
+	if (!_audio_stream) {
+		return 0;
+	}
+
+	return _audio_stream->channels;
+}
+
+int
+FFmpegContent::content_audio_frame_rate () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+
+	if (!_audio_stream) {
+		return 0;
+	}
+
+	return _audio_stream->frame_rate;
+}
+
+int
+FFmpegContent::output_audio_frame_rate () const
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+	
+	/* Resample to a DCI-approved sample rate */
+	double t = dcp_audio_frame_rate (content_audio_frame_rate ());
+
+	FrameRateConversion frc (video_frame_rate(), film->video_frame_rate());
+
+	/* Compensate if the DCP is being run at a different frame rate
+	   to the source; that is, if the video is run such that it will
+	   look different in the DCP compared to the source (slower or faster).
+	   skip/repeat doesn't come into effect here.
+	*/
+
+	if (frc.change_speed) {
+		t *= video_frame_rate() * frc.factor() / film->video_frame_rate();
+	}
+
+	return rint (t);
+}
+
+bool
+operator== (FFmpegSubtitleStream const & a, FFmpegSubtitleStream const & b)
+{
+	return a.id == b.id;
+}
+
+bool
+operator== (FFmpegAudioStream const & a, FFmpegAudioStream const & b)
+{
+	return a.id == b.id;
+}
+
+FFmpegAudioStream::FFmpegAudioStream (shared_ptr<const cxml::Node> node)
+	: mapping (node->node_child ("Mapping"))
+{
+	name = node->string_child ("Name");
+	id = node->number_child<int> ("Id");
+	frame_rate = node->number_child<int> ("FrameRate");
+	channels = node->number_child<int64_t> ("Channels");
+	first_audio = node->optional_number_child<double> ("FirstAudio");
+}
+
+void
+FFmpegAudioStream::as_xml (xmlpp::Node* root) const
+{
+	root->add_child("Name")->add_child_text (name);
+	root->add_child("Id")->add_child_text (lexical_cast<string> (id));
+	root->add_child("FrameRate")->add_child_text (lexical_cast<string> (frame_rate));
+	root->add_child("Channels")->add_child_text (lexical_cast<string> (channels));
+	if (first_audio) {
+		root->add_child("FirstAudio")->add_child_text (lexical_cast<string> (first_audio.get ()));
+	}
+	mapping.as_xml (root->add_child("Mapping"));
+}
+
+/** Construct a SubtitleStream from a value returned from to_string().
+ *  @param t String returned from to_string().
+ *  @param v State file version.
+ */
+FFmpegSubtitleStream::FFmpegSubtitleStream (shared_ptr<const cxml::Node> node)
+{
+	name = node->string_child ("Name");
+	id = node->number_child<int> ("Id");
+}
+
+void
+FFmpegSubtitleStream::as_xml (xmlpp::Node* root) const
+{
+	root->add_child("Name")->add_child_text (name);
+	root->add_child("Id")->add_child_text (lexical_cast<string> (id));
+}
+
+Time
+FFmpegContent::full_length () const
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+	
+	FrameRateConversion frc (video_frame_rate (), film->video_frame_rate ());
+	return video_length() * frc.factor() * TIME_HZ / film->video_frame_rate ();
+}
+
+AudioMapping
+FFmpegContent::audio_mapping () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+
+	if (!_audio_stream) {
+		return AudioMapping ();
+	}
+
+	return _audio_stream->mapping;
+}
+
+void
+FFmpegContent::set_filters (vector<Filter const *> const & filters)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_filters = filters;
+	}
+
+	signal_changed (FFmpegContentProperty::FILTERS);
+}
+
+void
+FFmpegContent::set_audio_mapping (AudioMapping m)
+{
+	audio_stream()->mapping = m;
+	signal_changed (AudioContentProperty::AUDIO_MAPPING);
+}
+
+string
+FFmpegContent::identifier () const
+{
+	stringstream s;
+
+	s << VideoContent::identifier();
+
+	boost::mutex::scoped_lock lm (_mutex);
+
+	if (_subtitle_stream) {
+		s << "_" << _subtitle_stream->id;
+	}
+
+	for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
+		s << "_" << (*i)->id ();
+	}
+
+	return s.str ();
+}
+