X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fffmpeg.cc;h=fa369dda429c9342c2b08eed7a4b74ee50a38c35;hb=cc27c2716f755305d67f1e1ba828ecf37f8405dd;hp=0d897abfaf27a8e361e22c8ebe1da7ce05a7add5;hpb=f1bf21a9c2581591ab80bfc997a22b93046f8c56;p=dcpomatic.git diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc index 0d897abfa..fa369dda4 100644 --- a/src/lib/ffmpeg.cc +++ b/src/lib/ffmpeg.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2013 Carl Hetherington + Copyright (C) 2013-2014 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 @@ -21,59 +21,81 @@ extern "C" { #include #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 "i18n.h" using std::string; -using std::stringstream; +using std::cout; using boost::shared_ptr; +using dcp::raw_convert; boost::mutex FFmpeg::_mutex; FFmpeg::FFmpeg (boost::shared_ptr c) : _ffmpeg_content (c) + , _avio_buffer (0) + , _avio_buffer_size (4096) + , _avio_context (0) , _format_context (0) , _frame (0) , _video_stream (-1) - , _video_codec_context (0) - , _video_codec (0) - , _audio_codec_context (0) - , _audio_codec (0) { setup_general (); - setup_video (); - setup_audio (); + setup_decoders (); } FFmpeg::~FFmpeg () { boost::mutex::scoped_lock lm (_mutex); - - if (_audio_codec_context) { - avcodec_close (_audio_codec_context); - } - if (_video_codec_context) { - avcodec_close (_video_codec_context); + for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { + avcodec_close (_format_context->streams[i]->codec); } - av_free (_frame); - + 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::setup_general () { av_register_all (); - if (avformat_open_input (&_format_context, _ffmpeg_content->file().string().c_str(), 0, 0) < 0) { - throw OpenFileError (_ffmpeg_content->file().string ()); + _file_group.set_paths (_ffmpeg_content->paths ()); + _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); + _format_context = avformat_alloc_context (); + _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 ()); } if (avformat_find_stream_info (_format_context, 0) < 0) { @@ -93,46 +115,87 @@ FFmpeg::setup_general () throw DecodeError (N_("could not find video stream")); } - _frame = avcodec_alloc_frame (); + /* Hack: if the AVStreams have zero IDs, put some in. 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. + */ + + uint32_t i = 0; + while (i < _format_context->nb_streams && _format_context->streams[i]->id == 0) { + ++i; + } + + if (i == _format_context->nb_streams) { + /* Put in our own IDs */ + for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { + _format_context->streams[i]->id = i; + } + } + + _frame = av_frame_alloc (); if (_frame == 0) { throw DecodeError (N_("could not allocate frame")); } } void -FFmpeg::setup_video () +FFmpeg::setup_decoders () { boost::mutex::scoped_lock lm (_mutex); - - _video_codec_context = _format_context->streams[_video_stream]->codec; - _video_codec = avcodec_find_decoder (_video_codec_context->codec_id); - if (_video_codec == 0) { - throw DecodeError (_("could not find video decoder")); - } + 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); + if (codec) { + if (avcodec_open2 (context, codec, 0) < 0) { + throw DecodeError (N_("could not open decoder")); + } + } - if (avcodec_open2 (_video_codec_context, _video_codec, 0) < 0) { - throw DecodeError (N_("could not open video decoder")); + /* We are silently ignoring any failures to find suitable decoders here */ } } -void -FFmpeg::setup_audio () +AVCodecContext * +FFmpeg::video_codec_context () const +{ + return _format_context->streams[_video_stream]->codec; +} + +AVCodecContext * +FFmpeg::audio_codec_context () const { - boost::mutex::scoped_lock lm (_mutex); - if (!_ffmpeg_content->audio_stream ()) { - return; + return 0; } + + return _ffmpeg_content->audio_stream()->stream(_format_context)->codec; +} - _audio_codec_context = _format_context->streams[_ffmpeg_content->audio_stream()->id]->codec; - _audio_codec = avcodec_find_decoder (_audio_codec_context->codec_id); - - if (_audio_codec == 0) { - throw DecodeError (_("could not find audio decoder")); +AVCodecContext * +FFmpeg::subtitle_codec_context () const +{ + if (!_ffmpeg_content->subtitle_stream ()) { + return 0; } + + return _ffmpeg_content->subtitle_stream()->stream(_format_context)->codec; +} - if (avcodec_open2 (_audio_codec_context, _audio_codec, 0) < 0) { - throw DecodeError (N_("could not open audio decoder")); +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); }