X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fffmpeg.cc;h=2038d6a8590f2e6df8a2d9c7301ac92251be05c4;hb=fc4956d144ed0869fe2fa1737adc21104bb47836;hp=bba6424847855f9a603d13ddcd3a245be988ddb5;hpb=6b62e9c77b2a45fd1d7084626f2bb2949e832e5f;p=dcpomatic.git diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc index bba642484..2038d6a85 100644 --- a/src/lib/ffmpeg.cc +++ b/src/lib/ffmpeg.cc @@ -1,19 +1,20 @@ /* - 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 . */ @@ -22,23 +23,30 @@ #include "film.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. */ @@ -124,8 +129,9 @@ 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 (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) { @@ -134,7 +140,7 @@ 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]; @@ -152,12 +158,8 @@ 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 @@ -199,12 +201,16 @@ 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")); @@ -218,7 +224,11 @@ FFmpeg::setup_decoders () 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 * @@ -262,3 +272,115 @@ FFmpeg::subtitle_period (AVSubtitle const & sub) packet_time + ContentTime::from_seconds (sub.end_display_time / 1e3) ); } + +string +FFmpeg::subtitle_id (AVSubtitle const & sub) +{ + Digester digester; + digester.add (sub.pts); + for (unsigned int i = 0; i < sub.num_rects; ++i) { + AVSubtitleRect* rect = sub.rects[i]; + if (rect->type == SUBTITLE_BITMAP) { + digester.add (rect->x); + digester.add (rect->y); + digester.add (rect->w); + digester.add (rect->h); +#ifdef DCPOMATIC_HAVE_AVSUBTITLERECT_PICT + int const line = rect->pict.linesize[0]; + for (int j = 0; j < rect->h; ++j) { + digester.add (rect->pict.data[0] + j * line, line); + } +#else + int const line = rect->linesize[0]; + for (int j = 0; j < rect->h; ++j) { + digester.add (rect->data[0] + j * line, line); + } +#endif + } else if (rect->type == SUBTITLE_TEXT) { + digester.add (string (rect->text)); + } else if (rect->type == SUBTITLE_ASS) { + digester.add (string (rect->ass)); + } + } + return digester.get (); +} + +/** @return true if sub starts a new image subtitle */ +bool +FFmpeg::subtitle_starts_image (AVSubtitle const & sub) +{ + bool image = false; + bool text = false; + + for (unsigned int i = 0; i < sub.num_rects; ++i) { + switch (sub.rects[i]->type) { + case SUBTITLE_BITMAP: + image = true; + break; + case SUBTITLE_TEXT: + case SUBTITLE_ASS: + text = true; + break; + default: + break; + } + } + + /* We can't cope with mixed image/text in one AVSubtitle */ + DCPOMATIC_ASSERT (!image || !text); + + return image; +} + +/** 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; +}