src/tools/dcpomatic_ecinema.cc

   1 /*
   2     Copyright (C) 2018 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 extern "C" {
  23 #include <libavformat/avformat.h>
  24 }
  25 #include <boost/filesystem.hpp>
  26 #include <boost/optional.hpp>
  27 #include <getopt.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #include <string>
  31 #include <iostream>
  32
  33 using std::string;
  34 using std::cerr;
  35 using std::cout;
  36 using boost::optional;
  37
  38 static void
  39 help (string n)
  40 {
  41         cerr << "Syntax: " << n << " [OPTION] <FILE>\n"
  42              << "  -v, --version        show DCP-o-matic version\n"
  43              << "  -h, --help           show this help\n"
  44              << "\n"
  45              << "<FILE> is the unencrypted .mp4 file.\n";
  46 }
  47
  48 int
  49 main (int argc, char* argv[])
  50 {
  51         optional<boost::filesystem::path> output;
  52
  53         int option_index = 0;
  54         while (true) {
  55                 static struct option long_options[] = {
  56                         { "version", no_argument, 0, 'v'},
  57                         { "help", no_argument, 0, 'h'},
  58                         { "output", required_argument, 0, 'o'},
  59                 };
  60
  61                 int c = getopt_long (argc, argv, "vho:", long_options, &option_index);
  62
  63                 if (c == -1) {
  64                         break;
  65                 }
  66
  67                 switch (c) {
  68                 case 'v':
  69                         cout << "dcpomatic version " << dcpomatic_version << " " << dcpomatic_git_commit << "\n";
  70                         exit (EXIT_SUCCESS);
  71                 case 'h':
  72                         help (argv[0]);
  73                         exit (EXIT_SUCCESS);
  74                 case 'o':
  75                         output = optarg;
  76                         break;
  77                 }
  78         }
  79
  80         if (optind >= argc) {
  81                 help (argv[0]);
  82                 exit (EXIT_FAILURE);
  83         }
  84
  85         if (!output) {
  86                 cerr << "You must specify --output or -o\n";
  87                 exit (EXIT_FAILURE);
  88         }
  89
  90         boost::filesystem::path input = argv[optind];
  91         boost::filesystem::path output_mp4 = *output / (input.filename().string() + ".ecinema");
  92
  93         if (!boost::filesystem::is_directory(*output)) {
  94                 boost::filesystem::create_directory (*output);
  95         }
  96
  97         av_register_all ();
  98
  99         AVFormatContext* input_fc = avformat_alloc_context ();
 100         if (avformat_open_input(&input_fc, input.string().c_str(), 0, 0) < 0) {
 101                 cerr << "Could not open input file\n";
 102                 exit (EXIT_FAILURE);
 103         }
 104
 105         if (avformat_find_stream_info (input_fc, 0) < 0) {
 106                 cerr << "Could not read stream information\n";
 107                 exit (EXIT_FAILURE);
 108         }
 109
 110         AVFormatContext* output_fc;
 111         avformat_alloc_output_context2 (&output_fc, av_guess_format("mp4", 0, 0), 0, 0);
 112
 113         for (uint32_t i = 0; i < input_fc->nb_streams; ++i) {
 114                 AVStream* is = input_fc->streams[i];
 115                 AVStream* os = avformat_new_stream (output_fc, is->codec->codec);
 116                 if (avcodec_copy_context (os->codec, is->codec) < 0) {
 117                         cerr << "Could not set up output stream.\n";
 118                         exit (EXIT_FAILURE);
 119                 }
 120
 121                 switch (os->codec->codec_type) {
 122                 case AVMEDIA_TYPE_VIDEO:
 123                         os->time_base = is->time_base;
 124                         os->avg_frame_rate = is->avg_frame_rate;
 125                         os->r_frame_rate = is->r_frame_rate;
 126                         os->sample_aspect_ratio = is->sample_aspect_ratio;
 127                         os->codec->time_base = is->codec->time_base;
 128                         os->codec->framerate = is->codec->framerate;
 129                         os->codec->pix_fmt = is->codec->pix_fmt;
 130                         break;
 131                 case AVMEDIA_TYPE_AUDIO:
 132                         os->codec->sample_fmt = is->codec->sample_fmt;
 133                         os->codec->bits_per_raw_sample = is->codec->bits_per_raw_sample;
 134                         os->codec->sample_rate = is->codec->sample_rate;
 135                         os->codec->channel_layout = is->codec->channel_layout;
 136                         os->codec->channels = is->codec->channels;
 137                         break;
 138                 default:
 139                         /* XXX */
 140                         break;
 141                 }
 142         }
 143
 144         if (avio_open2 (&output_fc->pb, output_mp4.string().c_str(), AVIO_FLAG_WRITE, 0, 0) < 0) {
 145                 cerr << "Could not open output file `" << output_mp4.string() << "'\n";
 146                 exit (EXIT_FAILURE);
 147         }
 148
 149         if (avformat_write_header (output_fc, 0) < 0) {
 150                 cerr << "Could not write header to output.\n";
 151                 exit (EXIT_FAILURE);
 152         }
 153
 154         AVPacket packet;
 155         while (av_read_frame(input_fc, &packet) >= 0) {
 156                 AVStream* is = input_fc->streams[packet.stream_index];
 157                 AVStream* os = output_fc->streams[packet.stream_index];
 158                 packet.pts = av_rescale_q_rnd(packet.pts, is->time_base, os->time_base, (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
 159                 packet.dts = av_rescale_q_rnd(packet.dts, is->time_base, os->time_base, (AVRounding) (AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
 160                 packet.duration = av_rescale_q(packet.duration, is->time_base, os->time_base);
 161                 packet.pos = -1;
 162                 if (av_interleaved_write_frame (output_fc, &packet) < 0) {
 163                         cerr << "Could not write frame to output.\n";
 164                         exit (EXIT_FAILURE);
 165                 }
 166         }
 167
 168         av_write_trailer (output_fc);
 169
 170         avformat_free_context (input_fc);
 171         avformat_free_context (output_fc);
 172 }