X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fffmpeg.cc;h=fa369dda429c9342c2b08eed7a4b74ee50a38c35;hb=cf8bbea2de38c4e9ac140f55b27311b7b6dcd814;hp=e9c41ea184f76b4ccabab981b1a3cebb7463d501;hpb=633a7e06b94fc04f24d0945aec05b2f9b9d1ea8e;p=dcpomatic.git diff --git a/src/lib/ffmpeg.cc b/src/lib/ffmpeg.cc index e9c41ea18..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 @@ -21,31 +21,35 @@ 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::cout; -using std::stringstream; using boost::shared_ptr; -using boost::lexical_cast; +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) { setup_general (); - setup_video (); - setup_audio (); + setup_decoders (); } FFmpeg::~FFmpeg () @@ -53,31 +57,45 @@ FFmpeg::~FFmpeg () boost::mutex::scoped_lock lm (_mutex); for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { - AVCodecContext* context = _format_context->streams[i]->codec; - if (context->codec_type == AVMEDIA_TYPE_VIDEO || context->codec_type == AVMEDIA_TYPE_AUDIO) { - avcodec_close (context); - } + avcodec_close (_format_context->streams[i]->codec); } - avcodec_free_frame (&_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 (); + _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", lexical_cast (5 * 60 * 1e6).c_str(), 0); - av_dict_set (&options, "probesize", lexical_cast (5 * 60 * 1e6).c_str(), 0); + 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, _ffmpeg_content->path().string().c_str(), 0, &options) < 0) { - throw OpenFileError (_ffmpeg_content->path().string ()); + 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) { @@ -97,52 +115,49 @@ FFmpeg::setup_general () throw DecodeError (N_("could not find video stream")); } - _frame = avcodec_alloc_frame (); - if (_frame == 0) { - throw DecodeError (N_("could not allocate 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; } -} -void -FFmpeg::setup_video () -{ - boost::mutex::scoped_lock lm (_mutex); - - AVCodecContext* context = _format_context->streams[_video_stream]->codec; - AVCodec* codec = avcodec_find_decoder (context->codec_id); - - if (codec == 0) { - throw DecodeError (_("could not find video decoder")); + 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; + } } - if (avcodec_open2 (context, codec, 0) < 0) { - throw DecodeError (N_("could not open video decoder")); + _frame = av_frame_alloc (); + if (_frame == 0) { + throw DecodeError (N_("could not allocate frame")); } } void -FFmpeg::setup_audio () +FFmpeg::setup_decoders () { boost::mutex::scoped_lock lm (_mutex); for (uint32_t i = 0; i < _format_context->nb_streams; ++i) { AVCodecContext* context = _format_context->streams[i]->codec; - if (context->codec_type != AVMEDIA_TYPE_AUDIO) { - continue; - } AVCodec* codec = avcodec_find_decoder (context->codec_id); - if (codec == 0) { - throw DecodeError (_("could not find audio decoder")); - } - - if (avcodec_open2 (context, codec, 0) < 0) { - throw DecodeError (N_("could not open audio decoder")); + if (codec) { + if (avcodec_open2 (context, codec, 0) < 0) { + throw DecodeError (N_("could not open decoder")); + } } + + /* We are silently ignoring any failures to find suitable decoders here */ } } - AVCodecContext * FFmpeg::video_codec_context () const { @@ -152,5 +167,35 @@ FFmpeg::video_codec_context () const AVCodecContext * FFmpeg::audio_codec_context () const { - return _format_context->streams[_ffmpeg_content->audio_stream()->id]->codec; + if (!_ffmpeg_content->audio_stream ()) { + return 0; + } + + return _ffmpeg_content->audio_stream()->stream(_format_context)->codec; +} + +AVCodecContext * +FFmpeg::subtitle_codec_context () const +{ + if (!_ffmpeg_content->subtitle_stream ()) { + return 0; + } + + return _ffmpeg_content->subtitle_stream()->stream(_format_context)->codec; +} + +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); }