X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Flib%2Fffmpeg_examiner.cc;h=719e7a2b0863e085fcb6a0308d73e345c8df1bcb;hb=69f25e496ba409c02aa27b1e07dfcde34c86a32b;hp=3de62ad079738748f8edaa223faa0a8e562fc663;hpb=09806bc8d6a48fc79d923ec1cdf6f90176bf8b6a;p=dcpomatic.git diff --git a/src/lib/ffmpeg_examiner.cc b/src/lib/ffmpeg_examiner.cc index 3de62ad07..719e7a2b0 100644 --- a/src/lib/ffmpeg_examiner.cc +++ b/src/lib/ffmpeg_examiner.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2013 Carl Hetherington + Copyright (C) 2013-2015 Carl Hetherington This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -20,21 +20,32 @@ extern "C" { #include #include +#include +#include } #include "ffmpeg_examiner.h" #include "ffmpeg_content.h" +#include "job.h" +#include "ffmpeg_audio_stream.h" +#include "ffmpeg_subtitle_stream.h" +#include "util.h" +#include "safe_stringstream.h" +#include +#include #include "i18n.h" using std::string; using std::cout; using std::max; -using std::stringstream; using boost::shared_ptr; using boost::optional; -FFmpegExaminer::FFmpegExaminer (shared_ptr c) +/** @param job job that the examiner is operating in, or 0 */ +FFmpegExaminer::FFmpegExaminer (shared_ptr c, shared_ptr job) : FFmpeg (c) + , _video_length (0) + , _need_video_length (false) { /* Find audio and subtitle streams */ @@ -49,7 +60,7 @@ FFmpegExaminer::FFmpegExaminer (shared_ptr c) if (s->codec->channel_layout == 0) { s->codec->channel_layout = av_get_default_channel_layout (s->codec->channels); } - + _audio_streams.push_back ( shared_ptr ( new FFmpegAudioStream (audio_stream_name (s), s->id, s->codec->sample_rate, s->codec->channels) @@ -61,70 +72,182 @@ FFmpegExaminer::FFmpegExaminer (shared_ptr c) } } - /* Run through until we find the first audio (for each stream) and video */ + /* See if the header has duration information in it */ + _need_video_length = _format_context->duration == AV_NOPTS_VALUE; + if (!_need_video_length) { + _video_length = (double (_format_context->duration) / AV_TIME_BASE) * video_frame_rate().get (); + } + + if (job) { + if (_need_video_length) { + job->sub (_("Finding length and subtitles")); + } else { + job->sub (_("Finding subtitles")); + } + } - while (1) { + /* Run through until we find: + * - the first video. + * - the first audio for each stream. + * - the subtitle periods for each stream. + * + * We have to note subtitle periods as otherwise we have no way of knowing + * where we should look for subtitles (video and audio are always present, + * so they are ok). + */ + + int64_t const len = _file_group.length (); + while (true) { int r = av_read_frame (_format_context, &_packet); if (r < 0) { break; } - int frame_finished; + if (job) { + if (len > 0) { + job->set_progress (float (_format_context->pb->pos) / len); + } else { + job->set_progress_unknown (); + } + } AVCodecContext* context = _format_context->streams[_packet.stream_index]->codec; - if (_packet.stream_index == _video_stream && !_first_video) { - if (avcodec_decode_video2 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) { - _first_video = frame_time (_format_context->streams[_video_stream]); + if (_packet.stream_index == _video_stream) { + video_packet (context); + } + + bool got_all_audio = true; + + for (size_t i = 0; i < _audio_streams.size(); ++i) { + if (_audio_streams[i]->uses_index (_format_context, _packet.stream_index)) { + audio_packet (context, _audio_streams[i]); } - } else { - for (size_t i = 0; i < _audio_streams.size(); ++i) { - if (_audio_streams[i]->uses_index (_format_context, _packet.stream_index) && !_audio_streams[i]->first_audio) { - if (avcodec_decode_audio4 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) { - _audio_streams[i]->first_audio = frame_time (_audio_streams[i]->stream (_format_context)); - } - } + if (!_audio_streams[i]->first_audio) { + got_all_audio = false; } } - bool have_all_audio = true; - size_t i = 0; - while (i < _audio_streams.size() && have_all_audio) { - have_all_audio = _audio_streams[i]->first_audio; - ++i; + for (size_t i = 0; i < _subtitle_streams.size(); ++i) { + if (_subtitle_streams[i]->uses_index (_format_context, _packet.stream_index)) { + subtitle_packet (context, _subtitle_streams[i]); + } } av_free_packet (&_packet); - - if (_first_video && have_all_audio) { + + if (_first_video && got_all_audio && _subtitle_streams.empty ()) { + /* All done */ break; } } + + for (LastSubtitleMap::const_iterator i = _last_subtitle_start.begin(); i != _last_subtitle_start.end(); ++i) { + if (i->second) { + i->first->add_subtitle ( + ContentTimePeriod ( + i->second.get (), + ContentTime::from_frames (video_length(), video_frame_rate().get_value_or (24)) + ) + ); + } + } + + /* We just added subtitles to our streams without taking the PTS offset into account; + this is because we might not know the PTS offset when the first subtitle is seen. + Now we know the PTS offset so we can apply it to those subtitles. + */ + if (video_frame_rate()) { + BOOST_FOREACH (shared_ptr i, _subtitle_streams) { + i->add_offset (pts_offset (_audio_streams, _first_video, video_frame_rate().get())); + } + } +} + +void +FFmpegExaminer::video_packet (AVCodecContext* context) +{ + if (_first_video && !_need_video_length) { + return; + } + + int frame_finished; + if (avcodec_decode_video2 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) { + if (!_first_video) { + _first_video = frame_time (_format_context->streams[_video_stream]); + } + if (_need_video_length) { + _video_length = frame_time ( + _format_context->streams[_video_stream] + ).get_value_or (ContentTime ()).frames_round (video_frame_rate().get ()); + } + } +} + +void +FFmpegExaminer::audio_packet (AVCodecContext* context, shared_ptr stream) +{ + if (stream->first_audio) { + return; + } + + int frame_finished; + if (avcodec_decode_audio4 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) { + stream->first_audio = frame_time (stream->stream (_format_context)); + } +} + +void +FFmpegExaminer::subtitle_packet (AVCodecContext* context, shared_ptr stream) +{ + int frame_finished; + AVSubtitle sub; + if (avcodec_decode_subtitle2 (context, &sub, &frame_finished, &_packet) >= 0 && frame_finished) { + FFmpegSubtitlePeriod const period = subtitle_period (sub); + LastSubtitleMap::iterator last = _last_subtitle_start.find (stream); + if (last != _last_subtitle_start.end() && last->second) { + /* We have seen the start of a subtitle but not yet the end. Whatever this is + finishes the previous subtitle, so add it */ + stream->add_subtitle (ContentTimePeriod (last->second.get (), period.from)); + if (sub.num_rects == 0) { + /* This is a `proper' end-of-subtitle */ + _last_subtitle_start[stream] = optional (); + } else { + /* This is just another subtitle, so we start again */ + _last_subtitle_start[stream] = period.from; + } + } else if (sub.num_rects == 1) { + if (period.to) { + stream->add_subtitle (ContentTimePeriod (period.from, period.to.get ())); + } else { + _last_subtitle_start[stream] = period.from; + } + } + avsubtitle_free (&sub); + } } optional FFmpegExaminer::frame_time (AVStream* s) const { optional t; - + int64_t const bet = av_frame_get_best_effort_timestamp (_frame); if (bet != AV_NOPTS_VALUE) { - t = ContentTime (bet * av_q2d (s->time_base)); + t = ContentTime::from_seconds (bet * av_q2d (s->time_base)); } return t; } -float +optional FFmpegExaminer::video_frame_rate () const { - AVStream* s = _format_context->streams[_video_stream]; - - if (s->avg_frame_rate.num && s->avg_frame_rate.den) { - return av_q2d (s->avg_frame_rate); - } - - return av_q2d (s->r_frame_rate); + /* This use of r_frame_rate is debateable; there's a few different + * frame rates in the format context, but this one seems to be the most + * reliable. + */ + return av_q2d (av_stream_get_r_frame_rate (_format_context->streams[_video_stream])); } dcp::Size @@ -134,17 +257,27 @@ FFmpegExaminer::video_size () const } /** @return Length according to our content's header */ -ContentTime +Frame FFmpegExaminer::video_length () const { - ContentTime const length = ContentTime::from_seconds (double (_format_context->duration) / AV_TIME_BASE); - return ContentTime (1, length.get ()); + return max (Frame (1), _video_length); +} + +optional +FFmpegExaminer::sample_aspect_ratio () const +{ + AVRational sar = av_guess_sample_aspect_ratio (_format_context, _format_context->streams[_video_stream], 0); + if (sar.num == 0) { + /* I assume this means that we don't know */ + return optional (); + } + return double (sar.num) / sar.den; } string FFmpegExaminer::audio_stream_name (AVStream* s) const { - stringstream n; + SafeStringStream n; n << stream_name (s); @@ -160,7 +293,7 @@ FFmpegExaminer::audio_stream_name (AVStream* s) const string FFmpegExaminer::subtitle_stream_name (AVStream* s) const { - stringstream n; + SafeStringStream n; n << stream_name (s); @@ -174,14 +307,14 @@ FFmpegExaminer::subtitle_stream_name (AVStream* s) const string FFmpegExaminer::stream_name (AVStream* s) const { - stringstream n; + SafeStringStream n; if (s->metadata) { AVDictionaryEntry const * lang = av_dict_get (s->metadata, "language", 0, 0); if (lang) { n << lang->value; } - + AVDictionaryEntry const * title = av_dict_get (s->metadata, "title", 0, 0); if (title) { if (!n.str().empty()) { @@ -193,3 +326,92 @@ FFmpegExaminer::stream_name (AVStream* s) const return n.str (); } + +int +FFmpegExaminer::bits_per_pixel () const +{ + return av_get_bits_per_pixel (av_pix_fmt_desc_get (video_codec_context()->pix_fmt)); +} + +bool +FFmpegExaminer::yuv () const +{ + switch (video_codec_context()->pix_fmt) { + case AV_PIX_FMT_YUV420P: + case AV_PIX_FMT_YUYV422: + case AV_PIX_FMT_YUV422P: + case AV_PIX_FMT_YUV444P: + case AV_PIX_FMT_YUV410P: + case AV_PIX_FMT_YUV411P: + case AV_PIX_FMT_YUVJ420P: + case AV_PIX_FMT_YUVJ422P: + case AV_PIX_FMT_YUVJ444P: + case AV_PIX_FMT_UYVY422: + case AV_PIX_FMT_UYYVYY411: + case AV_PIX_FMT_NV12: + case AV_PIX_FMT_NV21: + case AV_PIX_FMT_YUV440P: + case AV_PIX_FMT_YUVJ440P: + case AV_PIX_FMT_YUVA420P: + case AV_PIX_FMT_YUV420P16LE: + case AV_PIX_FMT_YUV420P16BE: + case AV_PIX_FMT_YUV422P16LE: + case AV_PIX_FMT_YUV422P16BE: + case AV_PIX_FMT_YUV444P16LE: + case AV_PIX_FMT_YUV444P16BE: + case AV_PIX_FMT_YUV420P9BE: + case AV_PIX_FMT_YUV420P9LE: + case AV_PIX_FMT_YUV420P10BE: + case AV_PIX_FMT_YUV420P10LE: + case AV_PIX_FMT_YUV422P10BE: + case AV_PIX_FMT_YUV422P10LE: + case AV_PIX_FMT_YUV444P9BE: + case AV_PIX_FMT_YUV444P9LE: + case AV_PIX_FMT_YUV444P10BE: + case AV_PIX_FMT_YUV444P10LE: + case AV_PIX_FMT_YUV422P9BE: + case AV_PIX_FMT_YUV422P9LE: + case AV_PIX_FMT_YUVA422P_LIBAV: + case AV_PIX_FMT_YUVA444P_LIBAV: + case AV_PIX_FMT_YUVA420P9BE: + case AV_PIX_FMT_YUVA420P9LE: + case AV_PIX_FMT_YUVA422P9BE: + case AV_PIX_FMT_YUVA422P9LE: + case AV_PIX_FMT_YUVA444P9BE: + case AV_PIX_FMT_YUVA444P9LE: + case AV_PIX_FMT_YUVA420P10BE: + case AV_PIX_FMT_YUVA420P10LE: + case AV_PIX_FMT_YUVA422P10BE: + case AV_PIX_FMT_YUVA422P10LE: + case AV_PIX_FMT_YUVA444P10BE: + case AV_PIX_FMT_YUVA444P10LE: + case AV_PIX_FMT_YUVA420P16BE: + case AV_PIX_FMT_YUVA420P16LE: + case AV_PIX_FMT_YUVA422P16BE: + case AV_PIX_FMT_YUVA422P16LE: + case AV_PIX_FMT_YUVA444P16BE: + case AV_PIX_FMT_YUVA444P16LE: + case AV_PIX_FMT_NV16: + case AV_PIX_FMT_NV20LE: + case AV_PIX_FMT_NV20BE: + case AV_PIX_FMT_YVYU422: + case AV_PIX_FMT_YUVA444P: + case AV_PIX_FMT_YUVA422P: + case AV_PIX_FMT_YUV420P12BE: + case AV_PIX_FMT_YUV420P12LE: + case AV_PIX_FMT_YUV420P14BE: + case AV_PIX_FMT_YUV420P14LE: + case AV_PIX_FMT_YUV422P12BE: + case AV_PIX_FMT_YUV422P12LE: + case AV_PIX_FMT_YUV422P14BE: + case AV_PIX_FMT_YUV422P14LE: + case AV_PIX_FMT_YUV444P12BE: + case AV_PIX_FMT_YUV444P12LE: + case AV_PIX_FMT_YUV444P14BE: + case AV_PIX_FMT_YUV444P14LE: + case AV_PIX_FMT_YUVJ411P: + return true; + default: + return false; + } +}