X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fffmpeg.cc;h=1502b3de96148d76a94b4d1a8d5f2fb4ea3dd082;hb=9c44c5fa8eaf00ef4e61c08273b8df55047ac082;hp=4eee089928480577a12948b52c23497d383bcdba;hpb=a6a4671df0a6405f1ec8b03eebab90f55c909625;p=dcpomatic.git diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc index 4eee08992..1502b3de9 100644 --- a/src/lib/ffmpeg.cc +++ b/src/lib/ffmpeg.cc @@ -1,44 +1,52 @@ /* - Copyright (C) 2013-2015 Carl Hetherington + Copyright (C) 2013-2016 Carl Hetherington - This program is free software; you can redistribute it and/or modify + 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. - This program is distributed in the hope that it will be useful, + 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 this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + along with DCP-o-matic. If not, see . */ #include "ffmpeg.h" #include "ffmpeg_content.h" #include "film.h" -#include "ffmpeg_audio_stream.h" -#include "ffmpeg_subtitle_stream.h" #include "exceptions.h" #include "util.h" -#include "raw_convert.h" #include "log.h" +#include "ffmpeg_subtitle_stream.h" +#include "ffmpeg_audio_stream.h" +#include "digester.h" +#include "compose.hpp" +#include extern "C" { #include #include #include } #include +#include +#include #include "i18n.h" using std::string; using std::cout; using std::cerr; +using std::vector; using boost::shared_ptr; +using boost::optional; +using dcp::raw_convert; boost::mutex FFmpeg::_mutex; boost::weak_ptr FFmpeg::_ffmpeg_log; @@ -50,7 +58,6 @@ FFmpeg::FFmpeg (boost::shared_ptr c) , _avio_context (0) , _format_context (0) , _frame (0) - , _video_stream (-1) { setup_general (); setup_decoders (); @@ -94,7 +101,7 @@ FFmpeg::ffmpeg_log_callback (void* ptr, int level, const char* fmt, va_list vl) if (log) { string str (line); boost::algorithm::trim (str); - log->log (String::compose ("FFmpeg: %1", str), Log::TYPE_GENERAL); + log->log (String::compose ("FFmpeg: %1", str), LogEntry::TYPE_GENERAL); } else { cerr << line; } @@ -103,8 +110,6 @@ FFmpeg::ffmpeg_log_callback (void* ptr, int level, const char* fmt, va_list vl) void FFmpeg::setup_general () { - av_register_all (); - /* This might not work too well in some cases of multiple FFmpeg decoders, but it's probably good enough. */ @@ -123,9 +128,13 @@ FFmpeg::setup_general () */ av_dict_set (&options, "analyzeduration", raw_convert (5 * 60 * 1000000).c_str(), 0); av_dict_set (&options, "probesize", raw_convert (5 * 60 * 1000000).c_str(), 0); + if (_ffmpeg_content->decryption_key()) { + av_dict_set (&options, "decryption_key", _ffmpeg_content->decryption_key()->c_str(), 0); + } - if (avformat_open_input (&_format_context, 0, 0, &options) < 0) { - throw OpenFileError (_ffmpeg_content->path(0).string ()); + int e = avformat_open_input (&_format_context, 0, 0, &options); + if (e < 0) { + throw OpenFileError (_ffmpeg_content->path(0).string(), e, true); } if (avformat_find_stream_info (_format_context, 0) < 0) { @@ -134,11 +143,11 @@ FFmpeg::setup_general () /* Find video stream */ - int video_stream_undefined_frame_rate = -1; + optional video_stream_undefined_frame_rate; for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { AVStream* s = _format_context->streams[i]; - if (s->codec->codec_type == AVMEDIA_TYPE_VIDEO) { + if (s->codec->codec_type == AVMEDIA_TYPE_VIDEO && avcodec_find_decoder(s->codec->codec_id)) { if (s->avg_frame_rate.num > 0 && s->avg_frame_rate.den > 0) { /* This is definitely our video stream */ _video_stream = i; @@ -152,12 +161,8 @@ FFmpeg::setup_general () /* Files from iTunes sometimes have two video streams, one with the avg_frame_rate.num and .den set to zero. Only use such a stream if there is no alternative. */ - if (_video_stream == -1 && video_stream_undefined_frame_rate != -1) { - _video_stream = video_stream_undefined_frame_rate; - } - - if (_video_stream < 0) { - throw DecodeError (N_("could not find video stream")); + if (!_video_stream && video_stream_undefined_frame_rate) { + _video_stream = video_stream_undefined_frame_rate.get(); } /* Hack: if the AVStreams have duplicate IDs, replace them with our @@ -199,26 +204,37 @@ FFmpeg::setup_decoders () AVCodec* codec = avcodec_find_decoder (context->codec_id); if (codec) { + AVDictionary* options = 0; /* This option disables decoding of DCA frame footers in our patched version of FFmpeg. I believe these footers are of no use to us, and they can cause problems when FFmpeg fails to decode them (mantis #352). */ - AVDictionary* options = 0; av_dict_set (&options, "disable_footer", "1", 0); + /* This allows decoding of some DNxHR 444 and HQX files; see + https://trac.ffmpeg.org/ticket/5681 + */ + av_dict_set_int (&options, "strict", FF_COMPLIANCE_EXPERIMENTAL, 0); if (avcodec_open2 (context, codec, &options) < 0) { throw DecodeError (N_("could not open decoder")); } + } else { + shared_ptr log = _ffmpeg_log.lock (); + if (log) { + log->log (String::compose ("No codec found for stream %1", i), LogEntry::TYPE_WARNING); + } } - - /* We are silently ignoring any failures to find suitable decoders here */ } } AVCodecContext * FFmpeg::video_codec_context () const { - return _format_context->streams[_video_stream]->codec; + if (!_video_stream) { + return 0; + } + + return _format_context->streams[_video_stream.get()]->codec; } AVCodecContext * @@ -246,3 +262,72 @@ FFmpeg::avio_seek (int64_t const pos, int whence) return _file_group.seek (pos, whence); } + +FFmpegSubtitlePeriod +FFmpeg::subtitle_period (AVSubtitle const & sub) +{ + ContentTime const packet_time = ContentTime::from_seconds (static_cast (sub.pts) / AV_TIME_BASE); + + if (sub.end_display_time == static_cast (-1)) { + /* End time is not known */ + return FFmpegSubtitlePeriod (packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3)); + } + + return FFmpegSubtitlePeriod ( + packet_time + ContentTime::from_seconds (sub.start_display_time / 1e3), + packet_time + ContentTime::from_seconds (sub.end_display_time / 1e3) + ); +} + +/** Compute the pts offset to use given a set of audio streams and some video details. + * Sometimes these parameters will have just been determined by an Examiner, sometimes + * they will have been retrieved from a piece of Content, hence the need for this method + * in FFmpeg. + */ +ContentTime +FFmpeg::pts_offset (vector > audio_streams, optional first_video, double video_frame_rate) const +{ + /* Audio and video frame PTS values may not start with 0. We want + to fiddle them so that: + + 1. One of them starts at time 0. + 2. The first video PTS value ends up on a frame boundary. + + Then we remove big initial gaps in PTS and we allow our + insertion of black frames to work. + + We will do: + audio_pts_to_use = audio_pts_from_ffmpeg + pts_offset; + video_pts_to_use = video_pts_from_ffmpeg + pts_offset; + */ + + /* First, make one of them start at 0 */ + + ContentTime po = ContentTime::min (); + + if (first_video) { + po = - first_video.get (); + } + + BOOST_FOREACH (shared_ptr i, audio_streams) { + if (i->first_audio) { + po = max (po, - i->first_audio.get ()); + } + } + + /* If the offset is positive we would be pushing things from a -ve PTS to be played. + I don't think we ever want to do that, as it seems things at -ve PTS are not meant + to be seen (use for alignment bars etc.); see mantis #418. + */ + if (po > ContentTime ()) { + po = ContentTime (); + } + + /* Now adjust so that the video pts starts on a frame */ + if (first_video) { + ContentTime const fvc = first_video.get() + po; + po += fvc.ceil (video_frame_rate) - fvc; + } + + return po; +}