/*
- 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
*/
#include <libcxml/cxml.h>
+#include <dcp/raw_convert.h>
#include "audio_content.h"
#include "analyse_audio_job.h"
#include "job_manager.h"
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;
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");
}
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));
}
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()
);
}
+
+void
+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);
+}