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 "lib/util.h"
  25 #include <dcp/key.h>
  26 extern "C" {
  27 #include <libavformat/avformat.h>
  28 #include <libavutil/aes_ctr.h>
  29 }
  30 #include <boost/filesystem.hpp>
  31 #include <boost/optional.hpp>
  32 #include <openssl/rand.h>
  33 #include <getopt.h>
  34 #include <sys/stat.h>
  35 #include <sys/types.h>
  36 #include <string>
  37 #include <iostream>
  38
  39 using std::string;
  40 using std::cerr;
  41 using std::cout;
  42 using boost::optional;
  43
  44 static void
  45 help (string n)
  46 {
  47         cerr << "Syntax: " << n << " [OPTION] <FILE>\n"
  48              << "  -v, --version        show DCP-o-matic version\n"
  49              << "  -h, --help           show this help\n"
  50              << "  -o, --output         output directory\n"
  51              << "  -f, --format         output format (mov or mp4; defaults to mov)\n"
  52              << "\n"
  53              << "<FILE> is the unencrypted .mp4 file.\n";
  54 }
  55
  56 int
  57 main (int argc, char* argv[])
  58 {
  59         optional<boost::filesystem::path> output;
  60         optional<boost::filesystem::path> format;
  61
  62         int option_index = 0;
  63         while (true) {
  64                 static struct option long_options[] = {
  65                         { "version", no_argument, 0, 'v'},
  66                         { "help", no_argument, 0, 'h'},
  67                         { "output", required_argument, 0, 'o'},
  68                         { "format", required_argument, 0, 'f'},
  69                 };
  70
  71                 int c = getopt_long (argc, argv, "vho:f:", long_options, &option_index);
  72
  73                 if (c == -1) {
  74                         break;
  75                 }
  76
  77                 switch (c) {
  78                 case 'v':
  79                         cout << "dcpomatic version " << dcpomatic_version << " " << dcpomatic_git_commit << "\n";
  80                         exit (EXIT_SUCCESS);
  81                 case 'h':
  82                         help (argv[0]);
  83                         exit (EXIT_SUCCESS);
  84                 case 'o':
  85                         output = optarg;
  86                         break;
  87                 case 'f':
  88                         format = optarg;
  89                         break;
  90                 }
  91         }
  92
  93         if (optind >= argc) {
  94                 help (argv[0]);
  95                 exit (EXIT_FAILURE);
  96         }
  97
  98         if (!output) {
  99                 cerr << "You must specify --output-media or -o\n";
 100                 exit (EXIT_FAILURE);
 101         }
 102
 103         if (!format) {
 104                 format = "mov";
 105         }
 106
 107         if (*format != "mov" && *format != "mp4") {
 108                 cerr << "Invalid format specified: must be mov or mp4\n";
 109                 exit (EXIT_FAILURE);
 110         }
 111
 112         boost::filesystem::path input = argv[optind];
 113         boost::filesystem::path output_mp4 = *output / (input.filename().string() + ".ecinema");
 114
 115         if (!boost::filesystem::is_directory(*output)) {
 116                 boost::filesystem::create_directory (*output);
 117         }
 118
 119         av_register_all ();
 120
 121         AVFormatContext* input_fc = avformat_alloc_context ();
 122         if (avformat_open_input(&input_fc, input.string().c_str(), 0, 0) < 0) {
 123                 cerr << "Could not open input file\n";
 124                 exit (EXIT_FAILURE);
 125         }
 126
 127         if (avformat_find_stream_info (input_fc, 0) < 0) {
 128                 cerr << "Could not read stream information\n";
 129                 exit (EXIT_FAILURE);
 130         }
 131
 132         AVFormatContext* output_fc;
 133         avformat_alloc_output_context2 (&output_fc, av_guess_format(format->c_str(), 0, 0), 0, 0);
 134
 135         for (uint32_t i = 0; i < input_fc->nb_streams; ++i) {
 136                 AVStream* is = input_fc->streams[i];
 137                 AVStream* os = avformat_new_stream (output_fc, is->codec->codec);
 138                 if (avcodec_copy_context (os->codec, is->codec) < 0) {
 139                         cerr << "Could not set up output stream.\n";
 140                         exit (EXIT_FAILURE);
 141                 }
 142
 143                 switch (os->codec->codec_type) {
 144                 case AVMEDIA_TYPE_VIDEO:
 145                         os->time_base = is->time_base;
 146                         os->avg_frame_rate = is->avg_frame_rate;
 147                         os->r_frame_rate = is->r_frame_rate;
 148                         os->sample_aspect_ratio = is->sample_aspect_ratio;
 149                         os->codec->time_base = is->codec->time_base;
 150                         os->codec->framerate = is->codec->framerate;
 151                         os->codec->pix_fmt = is->codec->pix_fmt;
 152                         break;
 153                 case AVMEDIA_TYPE_AUDIO:
 154                         os->codec->sample_fmt = is->codec->sample_fmt;
 155                         os->codec->bits_per_raw_sample = is->codec->bits_per_raw_sample;
 156                         os->codec->sample_rate = is->codec->sample_rate;
 157                         os->codec->channel_layout = is->codec->channel_layout;
 158                         os->codec->channels = is->codec->channels;
 159                         break;
 160                 default:
 161                         /* XXX */
 162                         break;
 163                 }
 164         }
 165
 166         if (avio_open2 (&output_fc->pb, output_mp4.string().c_str(), AVIO_FLAG_WRITE, 0, 0) < 0) {
 167                 cerr << "Could not open output file `" << output_mp4.string() << "'\n";
 168                 exit (EXIT_FAILURE);
 169         }
 170
 171         dcp::Key key (AES_CTR_KEY_SIZE);
 172         AVDictionary* options = 0;
 173         av_dict_set (&options, "encryption_key", key.hex().c_str(), 0);
 174         /* XXX: is this OK? */
 175         av_dict_set (&options, "encryption_kid", "00000000000000000000000000000000", 0);
 176         av_dict_set (&options, "encryption_scheme", "cenc-aes-ctr", 0);
 177
 178         string id = dcp::make_uuid ();
 179         if (av_dict_set(&output_fc->metadata, SWAROOP_ID_TAG, id.c_str(), 0) < 0) {
 180                 cerr << "Could not write ID to output.\n";
 181                 exit (EXIT_FAILURE);
 182         }
 183
 184         if (avformat_write_header (output_fc, &options) < 0) {
 185                 cerr << "Could not write header to output.\n";
 186                 exit (EXIT_FAILURE);
 187         }
 188
 189         AVPacket packet;
 190         while (av_read_frame(input_fc, &packet) >= 0) {
 191                 AVStream* is = input_fc->streams[packet.stream_index];
 192                 AVStream* os = output_fc->streams[packet.stream_index];
 193                 packet.pts = av_rescale_q_rnd(packet.pts, is->time_base, os->time_base, (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
 194                 packet.dts = av_rescale_q_rnd(packet.dts, is->time_base, os->time_base, (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
 195                 packet.duration = av_rescale_q(packet.duration, is->time_base, os->time_base);
 196                 packet.pos = -1;
 197                 if (av_interleaved_write_frame (output_fc, &packet) < 0) {
 198                         cerr << "Could not write frame to output.\n";
 199                         exit (EXIT_FAILURE);
 200                 }
 201         }
 202
 203         av_write_trailer (output_fc);
 204
 205         avformat_free_context (input_fc);
 206         avformat_free_context (output_fc);
 207
 208         DecryptedECinemaKDM decrypted_kdm (id, output_mp4.filename().string(), key);
 209         EncryptedECinemaKDM encrypted_kdm = decrypted_kdm.encrypt (Config::instance()->decryption_chain()->leaf());
 210         cout << encrypted_kdm.as_xml() << "\n";
 211 }