X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_content.cc;h=e8fd4bbd39d0e93813bd78b325624307e60e4750;hb=308488324dbc4d8b709d3fb1dc9fee0479346c21;hp=83a43f3bd2eae6ee48a54594adf313403dca8df2;hpb=ad49361b303d1ceff7048fa0e89ba609ca9ce376;p=dcpomatic.git

diff --git a/src/lib/audio_content.cc b/src/lib/audio_content.cc
index 83a43f3bd..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));
 }
 
 
@@ -141,35 +138,51 @@ 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 ();
+	return p;
 }
 
 string
 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());
+	return String::compose (
+		"audio: channels %1, length %2, content rate %3, resampled rate %4",
+		audio_channels(),
+		audio_length().seconds(),
+		audio_frame_rate(),
+		resampled_audio_frame_rate()
+		);
+}
+
+void
+AudioContent::set_audio_mapping (AudioMapping)
+{
+	signal_changed (AudioContentProperty::AUDIO_MAPPING);
 }
 
-/** Note: this is not particularly fast, as the FrameRateChange lookup
- *  is not very intelligent.
- *
- *  @param t Some duration to convert.
- *  @param at The time within the DCP to get the active frame rate change from; i.e. a point at which
- *  the `controlling' video content is active.
+/** @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.
  */
-AudioContent::Frame
-AudioContent::time_to_content_audio_frames (DCPTime t, DCPTime at) const
+int
+AudioContent::resampled_audio_frame_rate () const
 {
 	shared_ptr<const Film> film = _film.lock ();
 	assert (film);
 	
-	/* Consider the case where we're running a 25fps video at 24fps (i.e. slow)
-	   Our audio is at 44.1kHz.  We will resample it to 48000 * 25 / 24 and then
-	   run it at 48kHz (i.e. slow, to match).
+	/* Resample to a DCI-approved sample rate */
+	double t = dcp_audio_frame_rate (audio_frame_rate ());
 
-	   After 1 second, we'll have run the equivalent of 44.1kHz * 24 / 25 samples
-	   in the source.
+	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).
 	*/
-	
-	return rint (t * content_audio_frame_rate() * film->active_frame_rate_change(at).speed_up / TIME_HZ);
+
+	if (frc.change_speed) {
+		t /= frc.speed_up;
+	}
+
+	return rint (t);
 }