X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_analysis.cc;h=7e1dc6e7884f619765c4a927bb31af85ddde9871;hb=e60bb3e51bd1508b149e6b8f6608f09b5196ae26;hp=0cf08c5bdf1b42078f571b0b6105a99572d7e66c;hpb=51b4acfbaf0e2cd8b87bb675e023d9e940febc89;p=dcpomatic.git

diff --git a/src/lib/audio_analysis.cc b/src/lib/audio_analysis.cc
index 0cf08c5bd..7e1dc6e78 100644
--- a/src/lib/audio_analysis.cc
+++ b/src/lib/audio_analysis.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2015 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
@@ -17,22 +17,27 @@
 
 */
 
+#include "audio_analysis.h"
+#include "cross.h"
+#include "util.h"
+#include "raw_convert.h"
+#include <libxml++/libxml++.h>
+#include <boost/filesystem.hpp>
+#include <boost/foreach.hpp>
 #include <stdint.h>
 #include <cmath>
-#include <cassert>
-#include <fstream>
-#include <boost/filesystem.hpp>
-#include "audio_analysis.h"
+#include <cstdio>
+#include <iostream>
+#include <inttypes.h>
 
 using std::ostream;
 using std::istream;
 using std::string;
-using std::ofstream;
-using std::ifstream;
 using std::vector;
 using std::cout;
 using std::max;
 using std::list;
+using boost::shared_ptr;
 
 AudioPoint::AudioPoint ()
 {
@@ -41,55 +46,75 @@ AudioPoint::AudioPoint ()
 	}
 }
 
-AudioPoint::AudioPoint (istream& s)
+AudioPoint::AudioPoint (cxml::ConstNodePtr node)
+{
+	_data[PEAK] = node->number_child<float> ("Peak");
+	_data[RMS] = node->number_child<float> ("RMS");
+}
+
+AudioPoint::AudioPoint (AudioPoint const & other)
 {
 	for (int i = 0; i < COUNT; ++i) {
-		s >> _data[i];
+		_data[i] = other._data[i];
 	}
 }
 
-void
-AudioPoint::write (ostream& s) const
+AudioPoint &
+AudioPoint::operator= (AudioPoint const & other)
 {
+	if (this == &other) {
+		return *this;
+	}
+
 	for (int i = 0; i < COUNT; ++i) {
-		s << _data[i] << "\n";
+		_data[i] = other._data[i];
 	}
+
+	return *this;
+}
+
+void
+AudioPoint::as_xml (xmlpp::Element* parent) const
+{
+	parent->add_child ("Peak")->add_child_text (raw_convert<string> (_data[PEAK]));
+	parent->add_child ("RMS")->add_child_text (raw_convert<string> (_data[RMS]));
 }
-	
 
 AudioAnalysis::AudioAnalysis (int channels)
 {
 	_data.resize (channels);
 }
 
-AudioAnalysis::AudioAnalysis (string filename)
+AudioAnalysis::AudioAnalysis (boost::filesystem::path filename)
 {
-	ifstream f (filename.c_str ());
+	cxml::Document f ("AudioAnalysis");
+	f.read_file (filename);
 
-	int channels;
-	f >> channels;
-	_data.resize (channels);
+	BOOST_FOREACH (cxml::NodePtr i, f.node_children ("Channel")) {
+		vector<AudioPoint> channel;
 
-	for (int i = 0; i < channels; ++i) {
-		int points;
-		f >> points;
-		for (int j = 0; j < points; ++j) {
-			_data[i].push_back (AudioPoint (f));
+		BOOST_FOREACH (cxml::NodePtr j, i->node_children ("Point")) {
+			channel.push_back (AudioPoint (j));
 		}
+
+		_data.push_back (channel);
 	}
+
+	_peak = f.number_child<float> ("Peak");
+	_peak_time = DCPTime (f.number_child<DCPTime::Type> ("PeakTime"));
 }
 
 void
 AudioAnalysis::add_point (int c, AudioPoint const & p)
 {
-	assert (c < channels ());
+	DCPOMATIC_ASSERT (c < channels ());
 	_data[c].push_back (p);
 }
 
 AudioPoint
 AudioAnalysis::get_point (int c, int p) const
 {
-	assert (p < points (c));
+	DCPOMATIC_ASSERT (p < points (c));
 	return _data[c][p];
 }
 
@@ -102,50 +127,27 @@ AudioAnalysis::channels () const
 int
 AudioAnalysis::points (int c) const
 {
-	assert (c < channels ());
+	DCPOMATIC_ASSERT (c < channels ());
 	return _data[c].size ();
 }
 
 void
-AudioAnalysis::write (string filename)
+AudioAnalysis::write (boost::filesystem::path filename)
 {
-	string tmp = filename + ".tmp";
-	
-	ofstream f (tmp.c_str ());
-	f << _data.size() << "\n";
-	for (vector<vector<AudioPoint> >::iterator i = _data.begin(); i != _data.end(); ++i) {
-		f << i->size () << "\n";
-		for (vector<AudioPoint>::iterator j = i->begin(); j != i->end(); ++j) {
-			j->write (f);
+	shared_ptr<xmlpp::Document> doc (new xmlpp::Document);
+	xmlpp::Element* root = doc->create_root_node ("AudioAnalysis");
+
+	BOOST_FOREACH (vector<AudioPoint>& i, _data) {
+		xmlpp::Element* channel = root->add_child ("Channel");
+		BOOST_FOREACH (AudioPoint& j, i) {
+			j.as_xml (channel->add_child ("Point"));
 		}
 	}
 
-	f.close ();
-	boost::filesystem::rename (tmp, filename);
-}
-
-float
-AudioAnalysis::smooth (list<float> const & data, AudioPoint::Type t)
-{
-	float val;
-
-	switch (t) {
-	case AudioPoint::PEAK:
-		/* XXX: fall-off, or something...? */
-		val = -200;
-		for (list<float>::const_iterator i = data.begin(); i != data.end(); ++i) {
-			val = max (val, *i);
-		}
-		return val;
-	case AudioPoint::RMS:
-		val = 0;
-		for (list<float>::const_iterator i = data.begin(); i != data.end(); ++i) {
-			val += pow (*i, 2);
-		}
-		return sqrt (val / data.size());
-	default:
-		assert (false);
+	if (_peak) {
+		root->add_child("Peak")->add_child_text (raw_convert<string> (_peak.get ()));
+		root->add_child("PeakTime")->add_child_text (raw_convert<string> (_peak_time.get().get ()));
 	}
 
-	return 0;
+	doc->write_to_file_formatted (filename.string ());
 }