diff options
Diffstat (limited to 'src/lib/audio_analysis.cc')
| -rw-r--r-- | src/lib/audio_analysis.cc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/lib/audio_analysis.cc b/src/lib/audio_analysis.cc index 6fcd97c94..10e022322 100644 --- a/src/lib/audio_analysis.cc +++ b/src/lib/audio_analysis.cc @@ -21,6 +21,8 @@ #include "cross.h" #include "util.h" #include "raw_convert.h" +#include "playlist.h" +#include "audio_content.h" #include <libxml++/libxml++.h> #include <boost/filesystem.hpp> #include <boost/foreach.hpp> @@ -38,6 +40,7 @@ using std::cout; using std::max; using std::list; using boost::shared_ptr; +using boost::dynamic_pointer_cast; AudioAnalysis::AudioAnalysis (int channels) { @@ -115,3 +118,19 @@ AudioAnalysis::write (boost::filesystem::path filename) doc->write_to_file_formatted (filename.string ()); } + +float +AudioAnalysis::gain_correction (shared_ptr<const Playlist> playlist) +{ + if (playlist->content().size() == 1 && analysis_gain ()) { + /* In this case we know that the analysis was of a single piece of content and + we know that content's gain when the analysis was run. Hence we can work out + what correction is now needed to make it look `right'. + */ + shared_ptr<const AudioContent> ac = dynamic_pointer_cast<const AudioContent> (playlist->content().front ()); + DCPOMATIC_ASSERT (ac); + return ac->audio_gain() - analysis_gain().get (); + } + + return 0.0f; +} |