Add primitive description of what the playlist is doing. Add missing de-interleave of multi-channel audio sources.

6 files changed, 89 insertions, 2 deletions

diff --git a/src/lib/film.cc b/src/lib/film.cc
index 7d1985d08..2dc97c1b3 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -1160,6 +1160,12 @@ Film::has_subtitles () const
 	return _playlist->has_subtitles ();
 }
 
+string
+Film::playlist_description () const
+{
+	return _playlist->description ();
+}
+
 void
 Film::set_audio_mapping (AudioMapping m)
 {
diff --git a/src/lib/film.h b/src/lib/film.h
index 48b0d16c5..8748e18f5 100644
--- a/src/lib/film.h
+++ b/src/lib/film.h
@@ -121,6 +121,8 @@ public:
 
 	ContentVideoFrame content_length () const;
 
+	std::string playlist_description () const;
+
 	void set_loop (int);
 	int loop () const;
 
diff --git a/src/lib/playlist.cc b/src/lib/playlist.cc
index 63b44f9d6..6913874b9 100644
--- a/src/lib/playlist.cc
+++ b/src/lib/playlist.cc
@@ -30,12 +30,15 @@
 #include "imagemagick_content.h"
 #include "job.h"
 
+#include "i18n.h"
+
 using std::list;
 using std::cout;
 using std::vector;
 using std::min;
 using std::max;
 using std::string;
+using std::stringstream;
 using boost::shared_ptr;
 using boost::weak_ptr;
 using boost::dynamic_pointer_cast;
@@ -427,3 +430,51 @@ Playlist::has_subtitles () const
 	
 	return !fc->subtitle_streams().empty();
 }
+
+string
+Playlist::description () const
+{
+	stringstream s;
+
+	if (_video.empty ()) {
+		s << _("There is no video.") << "\n";
+	} else {
+		s << _("Video will come from ");
+		list<shared_ptr<const VideoContent> >::const_iterator i = _video.begin();
+		while (i != _video.end ()) {
+			s << (*i)->file().filename().string();
+			++i;
+			if (i != _video.end ()) {
+				s << ", ";
+			}
+		}
+		if (_video.size() > 1) {
+			s << " " << _("in sequence.");
+		}
+		s << "\n";
+	}
+
+	if (_audio.empty ()) {
+		s << _("There is no audio.") << "\n";
+	} else {
+		if (_audio_from == AUDIO_FFMPEG) {
+			s << _("Audio will come from the video files.") << "\n";
+		} else {
+			s << _("Audio will come from ");
+			list<shared_ptr<const AudioContent> >::const_iterator i = _audio.begin();
+			while (i != _audio.end ()) {
+				s << (*i)->file().filename().string();
+				++i;
+				if (i != _audio.end ()) {
+					s << ", ";
+				}
+			}
+			if (_audio.size() > 1) {
+				s << _(" run simultaneously.");
+			}
+			s << "\n";
+		}
+	}
+			
+	return s.str ();
+}
diff --git a/src/lib/playlist.h b/src/lib/playlist.h
index e6acff694..cea41ab32 100644
--- a/src/lib/playlist.h
+++ b/src/lib/playlist.h
@@ -88,6 +88,8 @@ public:
 		return _content;
 	}
 
+	std::string description () const;
+
 	boost::shared_ptr<FFmpegContent> ffmpeg () const;
 
 	std::list<boost::shared_ptr<const VideoContent> > video () const {
diff --git a/src/lib/sndfile_decoder.cc b/src/lib/sndfile_decoder.cc
index 9ba972e56..dd9e654c7 100644
--- a/src/lib/sndfile_decoder.cc
+++ b/src/lib/sndfile_decoder.cc
@@ -36,6 +36,7 @@ SndfileDecoder::SndfileDecoder (shared_ptr<const Film> f, shared_ptr<const Sndfi
 	: Decoder (f)
 	, AudioDecoder (f)
 	, _sndfile_content (c)
+	, _deinterleave_buffer (0)
 {
 	_sndfile = sf_open (_sndfile_content->file().string().c_str(), SFM_READ, &_info);
 	if (!_sndfile) {
@@ -49,6 +50,7 @@ SndfileDecoder::SndfileDecoder (shared_ptr<const Film> f, shared_ptr<const Sndfi
 SndfileDecoder::~SndfileDecoder ()
 {
 	sf_close (_sndfile);
+	delete[] _deinterleave_buffer;
 }
 
 bool
@@ -59,9 +61,32 @@ SndfileDecoder::pass ()
 	*/
 	sf_count_t const block = _sndfile_content->audio_frame_rate() / 2;
 	sf_count_t const this_time = min (block, _remaining);
+
+	int const channels = _sndfile_content->audio_channels ();
 	
-	shared_ptr<AudioBuffers> audio (new AudioBuffers (_sndfile_content->audio_channels(), this_time));
-	sf_read_float (_sndfile, audio->data(0), this_time);
+	shared_ptr<AudioBuffers> audio (new AudioBuffers (channels, this_time));
+
+	if (_sndfile_content->audio_channels() == 1) {
+		/* No de-interleaving required */
+		sf_read_float (_sndfile, audio->data(0), this_time);
+	} else {
+		/* Deinterleave */
+		if (!_deinterleave_buffer) {
+			_deinterleave_buffer = new float[block * channels];
+		}
+		sf_readf_float (_sndfile, _deinterleave_buffer, this_time);
+		vector<float*> out_ptr (channels);
+		for (int i = 0; i < channels; ++i) {
+			out_ptr[i] = audio->data(i);
+		}
+		float* in_ptr = _deinterleave_buffer;
+		for (int i = 0; i < this_time; ++i) {
+			for (int j = 0; j < channels; ++j) {
+				*out_ptr[j]++ = *in_ptr++;
+			}
+		}
+	}
+		
 	audio->set_frames (this_time);
 	Audio (audio, double(_done) / audio_frame_rate());
 	_done += this_time;
diff --git a/src/lib/sndfile_decoder.h b/src/lib/sndfile_decoder.h
index 1d212cc9b..64bd2f7f5 100644
--- a/src/lib/sndfile_decoder.h
+++ b/src/lib/sndfile_decoder.h
@@ -41,4 +41,5 @@ private:
 	SF_INFO _info;
 	ContentAudioFrame _done;
 	ContentAudioFrame _remaining;
+	float* _deinterleave_buffer;
 };