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/*
Copyright (C) 2014-2016 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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/reel_picture_asset.h
* @brief ReelPictureAsset class.
*/
#include "reel_picture_asset.h"
#include "picture_asset.h"
#include "dcp_assert.h"
#include "raw_convert.h"
#include "compose.hpp"
#include <libcxml/cxml.h>
#include <libxml++/libxml++.h>
#include <iomanip>
#include <cmath>
using std::bad_cast;
using std::string;
using std::stringstream;
using boost::shared_ptr;
using boost::dynamic_pointer_cast;
using boost::optional;
using namespace dcp;
ReelPictureAsset::ReelPictureAsset ()
: _frame_rate (Fraction (24, 1))
, _screen_aspect_ratio (Fraction (1998, 1080))
{
}
ReelPictureAsset::ReelPictureAsset (shared_ptr<PictureAsset> asset, int64_t entry_point)
: ReelAsset (asset, asset->edit_rate(), asset->intrinsic_duration(), entry_point)
, ReelMXF (asset->key_id())
, _frame_rate (asset->frame_rate ())
, _screen_aspect_ratio (asset->screen_aspect_ratio ())
{
}
ReelPictureAsset::ReelPictureAsset (shared_ptr<const cxml::Node> node)
: ReelAsset (node)
, ReelMXF (node)
{
_frame_rate = Fraction (node->string_child ("FrameRate"));
try {
_screen_aspect_ratio = Fraction (node->string_child ("ScreenAspectRatio"));
} catch (XMLError& e) {
/* It's not a fraction */
try {
float f = node->number_child<float> ("ScreenAspectRatio");
_screen_aspect_ratio = Fraction (f * 1000, 1000);
} catch (bad_cast& e) {
}
}
}
void
ReelPictureAsset::write_to_cpl (xmlpp::Node* node, Standard standard) const
{
ReelAsset::write_to_cpl (node, standard);
/* Find <MainPicture> */
xmlpp::Node* mp = find_child (node, cpl_node_name ());
mp->add_child ("FrameRate")->add_child_text (String::compose ("%1 %2", _frame_rate.numerator, _frame_rate.denominator));
if (standard == INTEROP) {
/* Allowed values for this tag from the standard */
float allowed[] = { 1.33, 1.66, 1.77, 1.85, 2.00, 2.39 };
int const num_allowed = sizeof(allowed) / sizeof(float);
/* Actual ratio */
float ratio = float (_screen_aspect_ratio.numerator) / _screen_aspect_ratio.denominator;
/* Pick the closest and use that */
optional<float> closest;
optional<float> error;
for (int i = 0; i < num_allowed; ++i) {
float const e = fabsf (allowed[i] - ratio);
if (!closest || e < error.get()) {
closest = allowed[i];
error = e;
}
}
mp->add_child ("ScreenAspectRatio")->add_child_text (raw_convert<string> (closest.get(), 2, true));
} else {
mp->add_child ("ScreenAspectRatio")->add_child_text (
String::compose ("%1 %2", _screen_aspect_ratio.numerator, _screen_aspect_ratio.denominator)
);
}
if (key_id ()) {
/* Find <Hash> */
xmlpp::Node* hash = find_child (mp, "Hash");
mp->add_child_before (hash, "KeyId")->add_child_text ("urn:uuid:" + key_id().get ());
}
}
string
ReelPictureAsset::key_type () const
{
return "MDIK";
}
bool
ReelPictureAsset::equals (shared_ptr<const ReelAsset> other, EqualityOptions opt, NoteHandler note) const
{
if (!ReelAsset::equals (other, opt, note)) {
return false;
}
shared_ptr<const ReelPictureAsset> rpa = dynamic_pointer_cast<const ReelPictureAsset> (other);
if (!rpa) {
return false;
}
if (_frame_rate != rpa->_frame_rate) {
note (DCP_ERROR, "frame rates differ in reel");
return false;
}
if (_screen_aspect_ratio != rpa->_screen_aspect_ratio) {
note (DCP_ERROR, "screen aspect ratios differ in reel");
return false;
}
return true;
}
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