X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fffmpeg.cc;h=503f8e51cf13b146d25d81d443688428a87e5f97;hp=fa369dda429c9342c2b08eed7a4b74ee50a38c35;hb=fc1441eeaa3c0805c37809685ea7a3f5ca173666;hpb=8c7a308c03e4b4196b4e2379a26d432b100ae2b1 diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc index fa369dda4..503f8e51c 100644 --- a/src/lib/ffmpeg.cc +++ b/src/lib/ffmpeg.cc @@ -1,101 +1,136 @@ /* - Copyright (C) 2013-2014 Carl Hetherington + Copyright (C) 2013-2021 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 "exceptions.h" +#include "util.h" +#include "log.h" +#include "dcpomatic_log.h" +#include "ffmpeg_subtitle_stream.h" +#include "ffmpeg_audio_stream.h" +#include "digester.h" +#include "compose.hpp" +#include "config.h" +#include extern "C" { #include #include #include } -#include -#include "ffmpeg.h" -#include "ffmpeg_content.h" -#include "ffmpeg_audio_stream.h" -#include "ffmpeg_subtitle_stream.h" -#include "exceptions.h" -#include "util.h" +#include +#include #include "i18n.h" + using std::string; using std::cout; -using boost::shared_ptr; +using std::cerr; +using std::vector; +using std::shared_ptr; +using boost::optional; using dcp::raw_convert; +using namespace dcpomatic; + boost::mutex FFmpeg::_mutex; -FFmpeg::FFmpeg (boost::shared_ptr c) + +FFmpeg::FFmpeg (std::shared_ptr c) : _ffmpeg_content (c) - , _avio_buffer (0) - , _avio_buffer_size (4096) - , _avio_context (0) - , _format_context (0) - , _frame (0) - , _video_stream (-1) { setup_general (); setup_decoders (); } + FFmpeg::~FFmpeg () { boost::mutex::scoped_lock lm (_mutex); - for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { - avcodec_close (_format_context->streams[i]->codec); + for (auto& i: _codec_context) { + avcodec_free_context (&i); } av_frame_free (&_frame); avformat_close_input (&_format_context); } + static int avio_read_wrapper (void* data, uint8_t* buffer, int amount) { return reinterpret_cast(data)->avio_read (buffer, amount); } + static int64_t avio_seek_wrapper (void* data, int64_t offset, int whence) { return reinterpret_cast(data)->avio_seek (offset, whence); } + +void +FFmpeg::ffmpeg_log_callback (void* ptr, int level, const char* fmt, va_list vl) +{ + if (level > AV_LOG_WARNING) { + return; + } + + char line[1024]; + static int prefix = 0; + av_log_format_line (ptr, level, fmt, vl, line, sizeof (line), &prefix); + string str (line); + boost::algorithm::trim (str); + dcpomatic_log->log (String::compose ("FFmpeg: %1", str), LogEntry::TYPE_GENERAL); +} + + 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. + */ + av_log_set_callback (FFmpeg::ffmpeg_log_callback); _file_group.set_paths (_ffmpeg_content->paths ()); - _avio_buffer = static_cast (wrapped_av_malloc (_avio_buffer_size)); + _avio_buffer = static_cast (wrapped_av_malloc(_avio_buffer_size)); _avio_context = avio_alloc_context (_avio_buffer, _avio_buffer_size, 0, this, avio_read_wrapper, 0, avio_seek_wrapper); + if (!_avio_context) { + throw std::bad_alloc (); + } _format_context = avformat_alloc_context (); + if (!_format_context) { + throw std::bad_alloc (); + } _format_context->pb = _avio_context; - - AVDictionary* options = 0; - /* These durations are in microseconds, and represent how far into the content file - we will look for streams. - */ - 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 ()); + + AVDictionary* options = nullptr; + int e = avformat_open_input (&_format_context, 0, 0, &options); + if (e < 0) { + throw OpenFileError (_ffmpeg_content->path(0).string(), e, OpenFileError::READ); } if (avformat_find_stream_info (_format_context, 0) < 0) { @@ -104,29 +139,49 @@ FFmpeg::setup_general () /* Find video stream */ + 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) { - _video_stream = i; + auto s = _format_context->streams[i]; + if (s->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && avcodec_find_decoder(s->codecpar->codec_id)) { + if (s->avg_frame_rate.num > 0 && s->avg_frame_rate.den > 0) { + /* This is definitely our video stream */ + _video_stream = i; + } else { + /* This is our video stream if we don't get a better offer */ + video_stream_undefined_frame_rate = i; + } } } - if (_video_stream < 0) { - throw DecodeError (N_("could not find video stream")); + /* 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 && video_stream_undefined_frame_rate) { + _video_stream = video_stream_undefined_frame_rate.get(); + } + + /* Ignore video streams with crazy frame rates. These are usually things like album art on MP3s. */ + if (_video_stream && av_q2d(av_guess_frame_rate(_format_context, _format_context->streams[_video_stream.get()], 0)) > 1000) { + _video_stream = optional(); } - /* Hack: if the AVStreams have zero IDs, put some in. We - use the IDs so that we can cope with VOBs, in which streams + /* Hack: if the AVStreams have duplicate IDs, replace them with our + own. We use the IDs so that we can cope with VOBs, in which streams move about in index but remain with the same ID in different - VOBs. However, some files have all-zero IDs, hence this hack. + VOBs. However, some files have duplicate IDs, hence this hack. */ - - uint32_t i = 0; - while (i < _format_context->nb_streams && _format_context->streams[i]->id == 0) { - ++i; + + bool duplicates = false; + for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { + for (uint32_t j = i + 1; j < _format_context->nb_streams; ++j) { + if (_format_context->streams[i]->id == _format_context->streams[j]->id) { + duplicates = true; + } + } } - if (i == _format_context->nb_streams) { + if (duplicates) { /* Put in our own IDs */ for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { _format_context->streams[i]->id = i; @@ -135,67 +190,165 @@ FFmpeg::setup_general () _frame = av_frame_alloc (); if (_frame == 0) { - throw DecodeError (N_("could not allocate frame")); + throw std::bad_alloc (); } } + void FFmpeg::setup_decoders () { boost::mutex::scoped_lock lm (_mutex); + _codec_context.resize (_format_context->nb_streams); for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { - AVCodecContext* context = _format_context->streams[i]->codec; - - AVCodec* codec = avcodec_find_decoder (context->codec_id); + auto codec = avcodec_find_decoder (_format_context->streams[i]->codecpar->codec_id); if (codec) { - if (avcodec_open2 (context, codec, 0) < 0) { - throw DecodeError (N_("could not open decoder")); + auto context = avcodec_alloc_context3 (codec); + if (!context) { + throw std::bad_alloc (); + } + _codec_context[i] = context; + + int r = avcodec_parameters_to_context (context, _format_context->streams[i]->codecpar); + if (r < 0) { + throw DecodeError ("avcodec_parameters_to_context", "FFmpeg::setup_decoders", r); } - } - /* We are silently ignoring any failures to find suitable decoders here */ + context->thread_count = 8; + context->thread_type = FF_THREAD_FRAME | FF_THREAD_SLICE; + + AVDictionary* options = nullptr; + /* 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). + */ + 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); + /* Enable following of links in files */ + av_dict_set_int (&options, "enable_drefs", 1, 0); + + r = avcodec_open2 (context, codec, &options); + if (r < 0) { + throw DecodeError (N_("avcodec_open2"), N_("FFmpeg::setup_decoders"), r); + } + } else { + dcpomatic_log->log (String::compose ("No codec found for stream %1", i), LogEntry::TYPE_WARNING); + } } } -AVCodecContext * -FFmpeg::video_codec_context () const -{ - return _format_context->streams[_video_stream]->codec; -} AVCodecContext * -FFmpeg::audio_codec_context () const +FFmpeg::video_codec_context () const { - if (!_ffmpeg_content->audio_stream ()) { - return 0; + if (!_video_stream) { + return nullptr; } - - return _ffmpeg_content->audio_stream()->stream(_format_context)->codec; + + return _codec_context[_video_stream.get()]; } + AVCodecContext * FFmpeg::subtitle_codec_context () const { - if (!_ffmpeg_content->subtitle_stream ()) { - return 0; + auto str = _ffmpeg_content->subtitle_stream(); + if (!str) { + return nullptr; } - - return _ffmpeg_content->subtitle_stream()->stream(_format_context)->codec; + + return _codec_context[str->index(_format_context)]; } + int FFmpeg::avio_read (uint8_t* buffer, int const amount) { return _file_group.read (buffer, amount); } + int64_t FFmpeg::avio_seek (int64_t const pos, int whence) { if (whence == AVSEEK_SIZE) { return _file_group.length (); } - + return _file_group.seek (pos, whence); } + + +FFmpegSubtitlePeriod +FFmpeg::subtitle_period (AVPacket const* packet, AVStream const* stream, AVSubtitle const & sub) +{ + auto const packet_time = ContentTime::from_seconds (packet->pts * av_q2d(stream->time_base)); + + if (sub.end_display_time == 0 || 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 */ + + auto po = ContentTime::min (); + + if (first_video) { + po = - first_video.get (); + } + + for (auto 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) { + auto const fvc = first_video.get() + po; + po += fvc.ceil (video_frame_rate) - fvc; + } + + return po; +}