X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_content.cc;h=e8fd4bbd39d0e93813bd78b325624307e60e4750;hb=308488324dbc4d8b709d3fb1dc9fee0479346c21;hp=c84f5713011d5a02ffd7636262eafb092a9f19e2;hpb=ee161be0fb0e93d77d34fb3f13fd562a76738a07;p=dcpomatic.git

diff --git a/src/lib/audio_content.cc b/src/lib/audio_content.cc
index c84f57130..e8fd4bbd3 100644
--- a/src/lib/audio_content.cc
+++ b/src/lib/audio_content.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2014 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
@@ -18,6 +18,7 @@
 */
 
 #include <libcxml/cxml.h>
+#include <dcp/raw_convert.h>
 #include "audio_content.h"
 #include "analyse_audio_job.h"
 #include "job_manager.h"
@@ -30,8 +31,8 @@
 using std::string;
 using std::vector;
 using boost::shared_ptr;
-using boost::lexical_cast;
 using boost::dynamic_pointer_cast;
+using dcp::raw_convert;
 
 int const AudioContentProperty::AUDIO_CHANNELS = 200;
 int const AudioContentProperty::AUDIO_LENGTH = 201;
@@ -59,8 +60,6 @@ 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");
 }
@@ -90,11 +89,9 @@ 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));
 }
 
 
@@ -150,11 +147,11 @@ string
 AudioContent::technical_summary () const
 {
 	return String::compose (
-		"audio: channels %1, length %2, raw rate %3, out rate %4",
+		"audio: channels %1, length %2, content rate %3, resampled rate %4",
 		audio_channels(),
 		audio_length().seconds(),
-		content_audio_frame_rate(),
-		output_audio_frame_rate()
+		audio_frame_rate(),
+		resampled_audio_frame_rate()
 		);
 }
 
@@ -163,3 +160,29 @@ AudioContent::set_audio_mapping (AudioMapping)
 {
 	signal_changed (AudioContentProperty::AUDIO_MAPPING);
 }
+
+/** @return the frame rate that this content should be resampled to in order
+ *  that it is in sync with the active video content at its start time.
+ */
+int
+AudioContent::resampled_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 (audio_frame_rate ());
+
+	FrameRateChange frc = film->active_frame_rate_change (position ());
+
+	/* 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).
+	*/
+
+	if (frc.change_speed) {
+		t /= frc.speed_up;
+	}
+
+	return rint (t);
+}