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/*
Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
This file is part of libdcp.
libdcp 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.
libdcp 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 libdcp. If not, see <http://www.gnu.org/licenses/>.
*/
/* If you are using an installed libdcp, these #includes would need to be changed to
#include <dcp/dcp.h>
#include <dcp/picture_asset.h>
... etc. ...
*/
#include "dcp.h"
#include "cpl.h"
#include "reel.h"
#include "reel_picture_asset.h"
#include "mono_j2k_picture_frame.h"
#include "mono_j2k_picture_asset.h"
#include "mono_j2k_picture_asset_reader.h"
#include "stereo_j2k_picture_asset.h"
#include "sound_asset.h"
#include "subtitle_asset.h"
#include "openjpeg_image.h"
#include "colour_conversion.h"
#include "rgb_xyz.h"
/* This DISABLE/ENABLE pair is just to ignore some warnings from Magick++.h; they
* can be removed.
*/
LIBDCP_DISABLE_WARNINGS
#include <Magick++.h>
LIBDCP_ENABLE_WARNINGS
/** @file examples/read_dcp.cc
* @brief Shows how to read a DCP.
*/
int
main ()
{
/* Unless libdcp has been installed, you need to pass a path containing the "tags" folder here */
dcp::init(boost::filesystem::path("."));
Magick::InitializeMagick(nullptr);
/* Create a DCP, specifying where our existing data is */
dcp::DCP dcp("/home/carl/Test_DCP");
/* Read the DCP to find out about it */
dcp.read();
if (dcp.all_encrypted()) {
std::cout << "DCP is encrypted.\n";
} else if (dcp.any_encrypted()) {
std::cout << "DCP is partially encrypted.\n";
} else {
std::cout << "DCP is not encrypted.\n";
}
std::cout << "DCP has " << dcp.cpls().size() << " CPLs.\n";
auto assets = dcp.assets();
std::cout << "DCP has " << assets.size() << " assets.\n";
for (auto i: assets) {
if (std::dynamic_pointer_cast<dcp::MonoJ2KPictureAsset>(i)) {
std::cout << "2D picture\n";
} else if (std::dynamic_pointer_cast<dcp::StereoJ2KPictureAsset>(i)) {
std::cout << "3D picture\n";
} else if (std::dynamic_pointer_cast<dcp::SoundAsset>(i)) {
std::cout << "Sound\n";
} else if (std::dynamic_pointer_cast<dcp::SubtitleAsset>(i)) {
std::cout << "Subtitle\n";
} else if (std::dynamic_pointer_cast<dcp::CPL>(i)) {
std::cout << "CPL\n";
}
std::cout << "\t" << i->file()->leaf().string() << "\n";
}
/* Take the first CPL */
auto cpl = dcp.cpls().front();
/* Get the picture asset in the first reel */
auto picture_asset = std::dynamic_pointer_cast<dcp::MonoJ2KPictureAsset>(
cpl->reels()[0]->main_picture()->asset()
);
/* Get a reader for it */
auto picture_asset_reader = picture_asset->start_read();
/* Get the 1000th frame of it */
auto picture_frame_j2k = picture_asset_reader->get_frame(999);
/* Get the frame as an XYZ image */
auto picture_image_xyz = picture_frame_j2k->xyz_image();
/* Convert to ARGB */
std::vector<uint8_t> rgba(picture_image_xyz->size().width * picture_image_xyz->size().height * 4);
dcp::xyz_to_rgba(picture_image_xyz, dcp::ColourConversion::srgb_to_xyz(), rgba.data(), picture_image_xyz->size().width * 4);
Magick::Image image(picture_image_xyz->size().width, picture_image_xyz->size().height, "BGRA", Magick::CharPixel, rgba.data());
image.write("frame.png");
return 0;
}
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