Back-port v2's rename and slight extension of FrameRateConversion.

[dcpomatic.git] / src / lib / audio_content.cc

diff --git a/src/lib/audio_content.cc b/src/lib/audio_content.cc
index 04823d1e6f12a0aa653a6c6a0f3a3c9ae57af29c..7d77154e17eaf044be7e5e9e9ea9751ede18f306 100644 (file)
--- a/src/lib/audio_content.cc
+++ b/src/lib/audio_content.cc
@@ -18,19 +18,23 @@
 */
 
 #include <libcxml/cxml.h>
+#include <libdcp/raw_convert.h>
 #include "audio_content.h"
 #include "analyse_audio_job.h"
 #include "job_manager.h"
 #include "film.h"
 #include "exceptions.h"
+#include "config.h"
+#include "frame_rate_change.h"
 
 #include "i18n.h"
 
 using std::string;
+using std::cout;
 using std::vector;
 using boost::shared_ptr;
-using boost::lexical_cast;
 using boost::dynamic_pointer_cast;
+using libdcp::raw_convert;
 
 int const AudioContentProperty::AUDIO_CHANNELS = 200;
 int const AudioContentProperty::AUDIO_LENGTH = 201;
@@ -42,7 +46,7 @@ int const AudioContentProperty::AUDIO_MAPPING = 205;
 AudioContent::AudioContent (shared_ptr<const Film> f, Time s)
        : Content (f, s)
        , _audio_gain (0)
-       , _audio_delay (0)
+       , _audio_delay (Config::instance()->default_audio_delay ())
 {
 
 }
@@ -50,7 +54,7 @@ AudioContent::AudioContent (shared_ptr<const Film> f, Time s)
 AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
        : Content (f, p)
        , _audio_gain (0)
-       , _audio_delay (0)
+       , _audio_delay (Config::instance()->default_audio_delay ())
 {
 
 }
@@ -58,8 +62,6 @@ AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
 AudioContent::AudioContent (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
        : Content (f, node)
 {
-       LocaleGuard lg;
-       
        _audio_gain = node->number_child<float> ("AudioGain");
        _audio_delay = node->number_child<int> ("AudioDelay");
 }
@@ -89,11 +91,9 @@ AudioContent::AudioContent (shared_ptr<const Film> f, vector<shared_ptr<Content>
 void
 AudioContent::as_xml (xmlpp::Node* node) const
 {
-       LocaleGuard lg;
-       
        boost::mutex::scoped_lock lm (_mutex);
-       node->add_child("AudioGain")->add_child_text (lexical_cast<string> (_audio_gain));
-       node->add_child("AudioDelay")->add_child_text (lexical_cast<string> (_audio_delay));
+       node->add_child("AudioGain")->add_child_text (raw_convert<string> (_audio_gain));
+       node->add_child("AudioDelay")->add_child_text (raw_convert<string> (_audio_delay));
 }
 
 
@@ -119,17 +119,17 @@ AudioContent::set_audio_delay (int d)
        signal_changed (AudioContentProperty::AUDIO_DELAY);
 }
 
-void
+boost::signals2::connection
 AudioContent::analyse_audio (boost::function<void()> finished)
 {
        shared_ptr<const Film> film = _film.lock ();
-       if (!film) {
-               return;
-       }
+       assert (film);
        
        shared_ptr<AnalyseAudioJob> job (new AnalyseAudioJob (film, dynamic_pointer_cast<AudioContent> (shared_from_this())));
-       job->Finished.connect (finished);
+       boost::signals2::connection c = job->Finished.connect (finished);
        JobManager::instance()->add (job);
+
+       return c;
 }
 
 boost::filesystem::path
@@ -140,7 +140,9 @@ AudioContent::audio_analysis_path () const
                return boost::filesystem::path ();
        }
 
-       return film->audio_analysis_path (dynamic_pointer_cast<const AudioContent> (shared_from_this ()));
+       boost::filesystem::path p = film->audio_analysis_dir ();
+       p /= digest() + "_" + audio_mapping().digest();
+       return p;
 }
 
 string
@@ -148,3 +150,28 @@ AudioContent::technical_summary () const
 {
        return String::compose ("audio: channels %1, length %2, raw rate %3, out rate %4", audio_channels(), audio_length(), content_audio_frame_rate(), output_audio_frame_rate());
 }
+
+int
+AudioContent::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 ());
+
+       FrameRateChange 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 /= frc.speed_up;
+       }
+
+       return rint (t);
+}
+