2 Copyright (C) 2018-2019 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "lib/version.h"
22 #include "lib/decrypted_ecinema_kdm.h"
23 #include "lib/config.h"
26 #include <libavformat/avformat.h>
27 #include <libavutil/aes_ctr.h>
29 #include <boost/filesystem.hpp>
30 #include <boost/optional.hpp>
31 #include <openssl/rand.h>
34 #include <sys/types.h>
41 using boost::optional;
46 cerr << "Syntax: " << n << " [OPTION] <FILE>\n"
47 << " -v, --version show DCP-o-matic version\n"
48 << " -h, --help show this help\n"
49 << " -o, --output output directory\n"
51 << "<FILE> is the unencrypted .mp4 file.\n";
55 main (int argc, char* argv[])
57 optional<boost::filesystem::path> output;
61 static struct option long_options[] = {
62 { "version", no_argument, 0, 'v'},
63 { "help", no_argument, 0, 'h'},
64 { "output", required_argument, 0, 'o'},
67 int c = getopt_long (argc, argv, "vho:", long_options, &option_index);
75 cout << "dcpomatic version " << dcpomatic_version << " " << dcpomatic_git_commit << "\n";
92 cerr << "You must specify --output-media or -o\n";
96 boost::filesystem::path input = argv[optind];
97 boost::filesystem::path output_mp4 = *output / (input.filename().string() + ".ecinema");
99 if (!boost::filesystem::is_directory(*output)) {
100 boost::filesystem::create_directory (*output);
105 AVFormatContext* input_fc = avformat_alloc_context ();
106 if (avformat_open_input(&input_fc, input.string().c_str(), 0, 0) < 0) {
107 cerr << "Could not open input file\n";
111 if (avformat_find_stream_info (input_fc, 0) < 0) {
112 cerr << "Could not read stream information\n";
116 AVFormatContext* output_fc;
117 avformat_alloc_output_context2 (&output_fc, av_guess_format("mp4", 0, 0), 0, 0);
119 for (uint32_t i = 0; i < input_fc->nb_streams; ++i) {
120 AVStream* is = input_fc->streams[i];
121 AVStream* os = avformat_new_stream (output_fc, is->codec->codec);
122 if (avcodec_copy_context (os->codec, is->codec) < 0) {
123 cerr << "Could not set up output stream.\n";
127 switch (os->codec->codec_type) {
128 case AVMEDIA_TYPE_VIDEO:
129 os->time_base = is->time_base;
130 os->avg_frame_rate = is->avg_frame_rate;
131 os->r_frame_rate = is->r_frame_rate;
132 os->sample_aspect_ratio = is->sample_aspect_ratio;
133 os->codec->time_base = is->codec->time_base;
134 os->codec->framerate = is->codec->framerate;
135 os->codec->pix_fmt = is->codec->pix_fmt;
137 case AVMEDIA_TYPE_AUDIO:
138 os->codec->sample_fmt = is->codec->sample_fmt;
139 os->codec->bits_per_raw_sample = is->codec->bits_per_raw_sample;
140 os->codec->sample_rate = is->codec->sample_rate;
141 os->codec->channel_layout = is->codec->channel_layout;
142 os->codec->channels = is->codec->channels;
150 if (avio_open2 (&output_fc->pb, output_mp4.string().c_str(), AVIO_FLAG_WRITE, 0, 0) < 0) {
151 cerr << "Could not open output file `" << output_mp4.string() << "'\n";
155 dcp::Key key (AES_CTR_KEY_SIZE);
156 AVDictionary* options = 0;
157 av_dict_set (&options, "encryption_key", key.hex().c_str(), 0);
159 if (avformat_write_header (output_fc, &options) < 0) {
160 cerr << "Could not write header to output.\n";
165 while (av_read_frame(input_fc, &packet) >= 0) {
166 AVStream* is = input_fc->streams[packet.stream_index];
167 AVStream* os = output_fc->streams[packet.stream_index];
168 packet.pts = av_rescale_q_rnd(packet.pts, is->time_base, os->time_base, (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
169 packet.dts = av_rescale_q_rnd(packet.dts, is->time_base, os->time_base, (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
170 packet.duration = av_rescale_q(packet.duration, is->time_base, os->time_base);
172 if (av_interleaved_write_frame (output_fc, &packet) < 0) {
173 cerr << "Could not write frame to output.\n";
178 av_write_trailer (output_fc);
180 avformat_free_context (input_fc);
181 avformat_free_context (output_fc);
183 DecryptedECinemaKDM decrypted_kdm (key);
184 EncryptedECinemaKDM encrypted_kdm = decrypted_kdm.encrypt (Config::instance()->decryption_chain()->leaf());
185 cout << encrypted_kdm.as_xml() << "\n";