src/tools/dcpomatic_ecinema.cc

   1 /*
   2     Copyright (C) 2018-2019 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   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.
  10
  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.
  15
  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/>.
  18
  19 */
  20
  21 #include "lib/version.h"
  22 #include "lib/decrypted_ecinema_kdm.h"
  23 #include "lib/config.h"
  24 #include <dcp/key.h>
  25 extern "C" {
  26 #include <libavformat/avformat.h>
  27 #include <libavutil/aes_ctr.h>
  28 }
  29 #include <boost/filesystem.hpp>
  30 #include <boost/optional.hpp>
  31 #include <openssl/rand.h>
  32 #include <getopt.h>
  33 #include <sys/stat.h>
  34 #include <sys/types.h>
  35 #include <string>
  36 #include <iostream>
  37
  38 using std::string;
  39 using std::cerr;
  40 using std::cout;
  41 using boost::optional;
  42
  43 static void
  44 help (string n)
  45 {
  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"
  50              << "\n"
  51              << "<FILE> is the unencrypted .mp4 file.\n";
  52 }
  53
  54 int
  55 main (int argc, char* argv[])
  56 {
  57         optional<boost::filesystem::path> output;
  58
  59         int option_index = 0;
  60         while (true) {
  61                 static struct option long_options[] = {
  62                         { "version", no_argument, 0, 'v'},
  63                         { "help", no_argument, 0, 'h'},
  64                         { "output", required_argument, 0, 'o'},
  65                 };
  66
  67                 int c = getopt_long (argc, argv, "vho:", long_options, &option_index);
  68
  69                 if (c == -1) {
  70                         break;
  71                 }
  72
  73                 switch (c) {
  74                 case 'v':
  75                         cout << "dcpomatic version " << dcpomatic_version << " " << dcpomatic_git_commit << "\n";
  76                         exit (EXIT_SUCCESS);
  77                 case 'h':
  78                         help (argv[0]);
  79                         exit (EXIT_SUCCESS);
  80                 case 'o':
  81                         output = optarg;
  82                         break;
  83                 }
  84         }
  85
  86         if (optind >= argc) {
  87                 help (argv[0]);
  88                 exit (EXIT_FAILURE);
  89         }
  90
  91         if (!output) {
  92                 cerr << "You must specify --output-media or -o\n";
  93                 exit (EXIT_FAILURE);
  94         }
  95
  96         boost::filesystem::path input = argv[optind];
  97         boost::filesystem::path output_mp4 = *output / (input.filename().string() + ".ecinema");
  98
  99         if (!boost::filesystem::is_directory(*output)) {
 100                 boost::filesystem::create_directory (*output);
 101         }
 102
 103         av_register_all ();
 104
 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";
 108                 exit (EXIT_FAILURE);
 109         }
 110
 111         if (avformat_find_stream_info (input_fc, 0) < 0) {
 112                 cerr << "Could not read stream information\n";
 113                 exit (EXIT_FAILURE);
 114         }
 115
 116         AVFormatContext* output_fc;
 117         avformat_alloc_output_context2 (&output_fc, av_guess_format("mp4", 0, 0), 0, 0);
 118
 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";
 124                         exit (EXIT_FAILURE);
 125                 }
 126
 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;
 136                         break;
 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;
 143                         break;
 144                 default:
 145                         /* XXX */
 146                         break;
 147                 }
 148         }
 149
 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";
 152                 exit (EXIT_FAILURE);
 153         }
 154
 155         dcp::Key key (AES_CTR_KEY_SIZE);
 156         AVDictionary* options = 0;
 157         av_dict_set (&options, "encryption_key", key.hex().c_str(), 0);
 158
 159         if (avformat_write_header (output_fc, &options) < 0) {
 160                 cerr << "Could not write header to output.\n";
 161                 exit (EXIT_FAILURE);
 162         }
 163
 164         AVPacket packet;
 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);
 171                 packet.pos = -1;
 172                 if (av_interleaved_write_frame (output_fc, &packet) < 0) {
 173                         cerr << "Could not write frame to output.\n";
 174                         exit (EXIT_FAILURE);
 175                 }
 176         }
 177
 178         av_write_trailer (output_fc);
 179
 180         avformat_free_context (input_fc);
 181         avformat_free_context (output_fc);
 182
 183         DecryptedECinemaKDM decrypted_kdm (key);
 184         EncryptedECinemaKDM encrypted_kdm = decrypted_kdm.encrypt (Config::instance()->decryption_chain());
 185         cout << encrypted_kdm.as_xml() << "\n";
 186 }