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/*
Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "test.h"
#include "lib/content_factory.h"
#include "lib/dcp_content.h"
#include "lib/film.h"
#include "lib/video_encoding.h"
#ifdef DCPOMATIC_LINUX
#include <boost/process.hpp>
#endif
#include <boost/test/unit_test.hpp>
using std::make_shared;
using std::shared_ptr;
using std::string;
using std::vector;
static
float
mbits_per_second(shared_ptr<const Film> film)
{
auto const mxf = find_file(film->dir(film->dcp_name()), "mpeg2");
auto const size = boost::filesystem::file_size(mxf);
auto const seconds = film->length().seconds();
return ((size * 8) / seconds) / 1e6;
}
#ifdef DCPOMATIC_LINUX
#ifdef DCPOMATIC_BOOST_PROCESS_V1
static
string
bitrate_in_header(shared_ptr<const Film> film)
{
namespace bp = boost::process;
bp::ipstream stream;
bp::child child(boost::process::search_path("mediainfo"), find_file(film->dir(film->dcp_name()), "mpeg2"), bp::std_out > stream);
string line;
string rate;
while (child.running() && std::getline(stream, line)) {
if (line.substr(0, 10) == "Bit rate ") {
auto colon = line.find(":");
if (colon != string::npos) {
rate = line.substr(colon + 2);
}
}
}
child.wait();
return rate;
}
#else
static
string
bitrate_in_header(shared_ptr<const Film> film)
{
namespace bp = boost::process::v2;
boost::asio::io_context context;
boost::asio::readable_pipe out{context};
bp::process child(context, bp::environment::find_executable("mediainfo"), { find_file(film->dir(film->dcp_name()), "mpeg2").string() }, bp::process_stdio{{}, out, {}});
string output;
boost::system::error_code ec;
while (child.running()) {
string block;
boost::asio::read(out, boost::asio::dynamic_buffer(block), ec);
output += block;
if (ec && ec == boost::asio::error::eof) {
break;
}
}
vector<string> lines;
boost::algorithm::split(lines, output, boost::is_any_of("\n"));
string rate;
for (auto const& line: lines) {
if (line.substr(0, 10) == "Bit rate ") {
auto colon = line.find(":");
if (colon != string::npos) {
rate = line.substr(colon + 2);
}
}
}
child.wait();
return rate;
}
#endif
#endif
BOOST_AUTO_TEST_CASE(mpeg2_video_bitrate1)
{
auto content = content_factory(TestPaths::private_data() / "boon_telly.mkv");
auto film = new_test_film("mpeg2_video_bitrate", content);
film->set_video_bit_rate(VideoEncoding::MPEG2, 25000000);
film->set_video_encoding(VideoEncoding::MPEG2);
film->set_interop(true);
make_and_verify_dcp(
film,
{ dcp::VerificationNote::Code::INVALID_STANDARD },
false, false
);
BOOST_CHECK_CLOSE(mbits_per_second(film), 25.0047, 0.001);
#ifdef DCPOMATIC_LINUX
BOOST_CHECK_EQUAL(bitrate_in_header(film), "25.0 Mb/s");
#endif
}
BOOST_AUTO_TEST_CASE(mpeg2_video_bitrate2)
{
auto content = make_shared<DCPContent>(TestPaths::private_data() / "JourneyToJah_TLR-1_F_EN-DE-FR_CH_51_2K_LOK_20140225_DGL_SMPTE_OV");
auto film = new_test_film("mpeg2_video_bitrate", { content });
film->set_video_bit_rate(VideoEncoding::MPEG2, 5000000);
film->set_video_encoding(VideoEncoding::MPEG2);
film->set_interop(true);
make_and_verify_dcp(
film,
{ dcp::VerificationNote::Code::INVALID_STANDARD },
false, false
);
BOOST_CHECK_CLOSE(mbits_per_second(film), 5.01890659, 0.1);
#ifdef DCPOMATIC_LINUX
BOOST_CHECK_EQUAL(bitrate_in_header(film), "5 000 kb/s");
#endif
}
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