1 files changed, 283 insertions, 0 deletions
diff --git a/src/lib/player.cc b/src/lib/player.cc
new file mode 100644
index 000000000..635b67cad
--- /dev/null
+++ b/src/lib/player.cc
@@ -0,0 +1,283 @@
+/*
+    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 "player.h"
+#include "film.h"
+#include "ffmpeg_decoder.h"
+#include "ffmpeg_content.h"
+#include "imagemagick_decoder.h"
+#include "imagemagick_content.h"
+#include "sndfile_decoder.h"
+#include "sndfile_content.h"
+#include "playlist.h"
+#include "job.h"
+
+using std::list;
+using std::cout;
+using boost::shared_ptr;
+using boost::weak_ptr;
+using boost::dynamic_pointer_cast;
+
+Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
+	: _film (f)
+	, _playlist (p)
+	, _video (true)
+	, _audio (true)
+	, _subtitles (true)
+	, _have_valid_decoders (false)
+{
+	_playlist->Changed.connect (bind (&Player::playlist_changed, this));
+	_playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2));
+}
+
+void
+Player::disable_video ()
+{
+	_video = false;
+}
+
+void
+Player::disable_audio ()
+{
+	_audio = false;
+}
+
+void
+Player::disable_subtitles ()
+{
+	_subtitles = false;
+}
+
+bool
+Player::pass ()
+{
+	if (!_have_valid_decoders) {
+		setup_decoders ();
+		_have_valid_decoders = true;
+	}
+	
+	bool done = true;
+	
+	if (_video_decoder != _video_decoders.end ()) {
+		if ((*_video_decoder)->pass ()) {
+			_video_decoder++;
+		}
+		
+		if (_video_decoder != _video_decoders.end ()) {
+			done = false;
+		}
+	}
+
+	if (_playlist->audio_from() == Playlist::AUDIO_SNDFILE) {
+		for (list<shared_ptr<SndfileDecoder> >::iterator i = _sndfile_decoders.begin(); i != _sndfile_decoders.end(); ++i) {
+			if (!(*i)->pass ()) {
+				done = false;
+			}
+		}
+
+		Audio (_audio_buffers, _audio_time.get());
+		_audio_buffers.reset ();
+		_audio_time = boost::none;
+	}
+
+	return done;
+}
+
+void
+Player::set_progress (shared_ptr<Job> job)
+{
+	/* Assume progress can be divined from how far through the video we are */
+
+	if (_video_decoder == _video_decoders.end() || !_playlist->video_length()) {
+		return;
+	}
+	
+	ContentVideoFrame p = 0;
+	list<shared_ptr<VideoDecoder> >::iterator i = _video_decoders.begin ();
+	while (i != _video_decoders.end() && i != _video_decoder) {
+		p += (*i)->video_length ();
+	}
+
+	job->set_progress (float ((*_video_decoder)->video_frame ()) / _playlist->video_length ());
+}
+
+void
+Player::process_video (shared_ptr<Image> i, bool same, shared_ptr<Subtitle> s, double t)
+{
+	/* XXX: this time will need mangling to add on the offset of the start of the content */
+	Video (i, same, s, t);
+}
+
+void
+Player::process_audio (weak_ptr<const AudioContent> c, shared_ptr<AudioBuffers> b, double t)
+{
+	/* XXX: this time will need mangling to add on the offset of the start of the content */
+	AudioMapping mapping = _film->audio_mapping ();
+	if (!_audio_buffers) {
+		_audio_buffers.reset (new AudioBuffers (mapping.dcp_channels(), b->frames ()));
+		_audio_buffers->make_silent ();
+		_audio_time = t;
+	}
+
+	for (int i = 0; i < b->channels(); ++i) {
+		list<libdcp::Channel> dcp = mapping.content_to_dcp (AudioMapping::Channel (c, i));
+		for (list<libdcp::Channel>::iterator j = dcp.begin(); j != dcp.end(); ++j) {
+			_audio_buffers->accumulate (b, i, static_cast<int> (*j));
+		}
+	}
+
+	if (_playlist->audio_from() == Playlist::AUDIO_FFMPEG) {
+		/* We can just emit this audio now as it will all be here */
+		Audio (_audio_buffers, t);
+		_audio_buffers.reset ();
+		_audio_time = boost::none;
+	}
+}
+
+/** @return true on error */
+bool
+Player::seek (double t)
+{
+	if (!_have_valid_decoders) {
+		setup_decoders ();
+		_have_valid_decoders = true;
+	}
+
+	/* Find the decoder that contains this position */
+	_video_decoder = _video_decoders.begin ();
+	while (_video_decoder != _video_decoders.end ()) {
+		double const this_length = double ((*_video_decoder)->video_length()) / _film->video_frame_rate ();
+		if (t < this_length) {
+			break;
+		}
+		t -= this_length;
+		++_video_decoder;
+	}
+	
+	if (_video_decoder != _video_decoders.end()) {
+		(*_video_decoder)->seek (t);
+	} else {
+		return true;
+	}
+
+	/* XXX: don't seek audio because we don't need to... */
+
+	return false;
+}
+
+
+void
+Player::seek_back ()
+{
+	/* XXX */
+}
+
+void
+Player::seek_forward ()
+{
+	/* XXX */
+}
+
+
+void
+Player::setup_decoders ()
+{
+	_video_decoders.clear ();
+	_video_decoder = _video_decoders.end ();
+	_sndfile_decoders.clear ();
+	
+	if (_video) {
+		list<shared_ptr<const VideoContent> > vc = _playlist->video ();
+		for (list<shared_ptr<const VideoContent> >::iterator i = vc.begin(); i != vc.end(); ++i) {
+
+			shared_ptr<VideoDecoder> d;
+			
+			/* XXX: into content? */
+			
+			shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
+			if (fc) {
+				shared_ptr<FFmpegDecoder> fd (
+					new FFmpegDecoder (
+						_film, fc, _video,
+						_audio && _playlist->audio_from() == Playlist::AUDIO_FFMPEG,
+						_subtitles
+						)
+					);
+
+				if (_playlist->audio_from() == Playlist::AUDIO_FFMPEG) {
+					fd->Audio.connect (bind (&Player::process_audio, this, fc, _1, _2));
+				}
+
+				d = fd;
+			}
+
+			shared_ptr<const ImageMagickContent> ic = dynamic_pointer_cast<const ImageMagickContent> (*i);
+			if (ic) {
+				d.reset (new ImageMagickDecoder (_film, ic));
+			}
+
+			d->connect_video (shared_from_this ());
+			_video_decoders.push_back (d);
+		}
+
+		_video_decoder = _video_decoders.begin ();
+	}
+
+	if (_audio && _playlist->audio_from() == Playlist::AUDIO_SNDFILE) {
+		list<shared_ptr<const SndfileContent> > sc = _playlist->sndfile ();
+		for (list<shared_ptr<const SndfileContent> >::iterator i = sc.begin(); i != sc.end(); ++i) {
+			shared_ptr<SndfileDecoder> d (new SndfileDecoder (_film, *i));
+			_sndfile_decoders.push_back (d);
+			d->Audio.connect (bind (&Player::process_audio, this, *i, _1, _2));
+		}
+	}
+}
+
+double
+Player::last_video_time () const
+{
+	double t = 0;
+	for (list<shared_ptr<VideoDecoder> >::const_iterator i = _video_decoders.begin(); i != _video_decoder; ++i) {
+		t += (*i)->video_length() / (*i)->video_frame_rate ();
+	}
+
+	return t + (*_video_decoder)->last_content_time ();
+}
+
+void
+Player::content_changed (weak_ptr<Content> w, int p)
+{
+	shared_ptr<Content> c = w.lock ();
+	if (!c) {
+		return;
+	}
+
+	if (p == VideoContentProperty::VIDEO_LENGTH) {
+		if (dynamic_pointer_cast<FFmpegContent> (c)) {
+			/* FFmpeg content length changes are serious; we need new decoders */
+			_have_valid_decoders = false;
+		}
+	}
+}
+
+void
+Player::playlist_changed ()
+{
+	_have_valid_decoders = false;
+}