X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fffmpeg_content.cc;h=a3a1cfb0fd491da77b0b2ac23b6964fb75983309;hp=9dc4afab9b3b1233d7f6d60301fccadef72475e9;hb=f0c10e92b849566e458bc323f8783a6fe83e52d2;hpb=fa61fc99549264810e17fcd35abffe9e8ddab5b2 diff --git a/src/lib/ffmpeg_content.cc b/src/lib/ffmpeg_content.cc index 9dc4afab9..a3a1cfb0f 100644 --- a/src/lib/ffmpeg_content.cc +++ b/src/lib/ffmpeg_content.cc @@ -1,23 +1,26 @@ /* - 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 . */ #include "ffmpeg_content.h" +#include "video_content.h" +#include "audio_content.h" #include "ffmpeg_examiner.h" #include "ffmpeg_subtitle_stream.h" #include "ffmpeg_audio_stream.h" @@ -29,48 +32,63 @@ #include "log.h" #include "exceptions.h" #include "frame_rate_change.h" -#include "safe_stringstream.h" -#include "raw_convert.h" +#include "text_content.h" +#include #include extern "C" { #include +#include } +#include #include +#include #include "i18n.h" -#define LOG_GENERAL(...) film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL); - using std::string; using std::vector; using std::list; using std::cout; using std::pair; +using std::make_pair; +using std::max; using boost::shared_ptr; using boost::dynamic_pointer_cast; +using boost::optional; +using dcp::raw_convert; int const FFmpegContentProperty::SUBTITLE_STREAMS = 100; int const FFmpegContentProperty::SUBTITLE_STREAM = 101; int const FFmpegContentProperty::FILTERS = 102; -FFmpegContent::FFmpegContent (shared_ptr f, boost::filesystem::path p) - : Content (f, p) - , VideoContent (f, p) - , AudioContent (f, p) - , SubtitleContent (f, p) +FFmpegContent::FFmpegContent (boost::filesystem::path p) + : Content (p) + , _encrypted (false) { } -FFmpegContent::FFmpegContent (shared_ptr f, cxml::ConstNodePtr node, int version, list& notes) - : Content (f, node) - , VideoContent (f, node, version) - , AudioContent (f, node) - , SubtitleContent (f, node, version) +template +optional +get_optional_enum (cxml::ConstNodePtr node, string name) +{ + optional const v = node->optional_number_child(name); + if (!v) { + return optional(); + } + return static_cast(*v); +} + +FFmpegContent::FFmpegContent (cxml::ConstNodePtr node, int version, list& notes) + : Content (node) { + video = VideoContent::from_xml (this, node, version); + audio = AudioContent::from_xml (this, node, version); + text = TextContent::from_xml (this, node, version); + list c = node->node_children ("SubtitleStream"); for (list::const_iterator i = c.begin(); i != c.end(); ++i) { - _subtitle_streams.push_back (shared_ptr (new FFmpegSubtitleStream (*i))); + _subtitle_streams.push_back (shared_ptr (new FFmpegSubtitleStream (*i, version))); if ((*i)->optional_number_child ("Selected")) { _subtitle_stream = _subtitle_streams.back (); } @@ -78,7 +96,12 @@ FFmpegContent::FFmpegContent (shared_ptr f, cxml::ConstNodePtr node, c = node->node_children ("AudioStream"); for (list::const_iterator i = c.begin(); i != c.end(); ++i) { - _audio_streams.push_back (shared_ptr (new FFmpegAudioStream (*i, version))); + shared_ptr as (new FFmpegAudioStream (*i, version)); + audio->add_stream (as); + if (version < 11 && !(*i)->optional_node_child ("Selected")) { + /* This is an old file and this stream is not selected, so un-map it */ + as->set_mapping (AudioMapping (as->channels (), MAX_DCP_AUDIO_CHANNELS)); + } } c = node->node_children ("Filter"); @@ -91,39 +114,105 @@ FFmpegContent::FFmpegContent (shared_ptr f, cxml::ConstNodePtr node, } } - _first_video = node->optional_number_child ("FirstVideo"); + optional const f = node->optional_number_child ("FirstVideo"); + if (f) { + _first_video = ContentTime (f.get ()); + } + + _color_range = get_optional_enum(node, "ColorRange"); + _color_primaries = get_optional_enum(node, "ColorPrimaries"); + _color_trc = get_optional_enum(node, "ColorTransferCharacteristic"); + _colorspace = get_optional_enum(node, "Colorspace"); + _bits_per_pixel = node->optional_number_child ("BitsPerPixel"); + _decryption_key = node->optional_string_child ("DecryptionKey"); + _encrypted = node->optional_bool_child("Encrypted").get_value_or(false); } -FFmpegContent::FFmpegContent (shared_ptr f, vector > c) - : Content (f, c) - , VideoContent (f, c) - , AudioContent (f, c) - , SubtitleContent (f, c) +FFmpegContent::FFmpegContent (vector > c) + : Content (c) { + vector >::const_iterator i = c.begin (); + + bool need_video = false; + bool need_audio = false; + bool need_text = false; + + if (i != c.end ()) { + need_video = static_cast ((*i)->video); + need_audio = static_cast ((*i)->audio); + need_text = !(*i)->text.empty(); + } + + while (i != c.end ()) { + if (need_video != static_cast ((*i)->video)) { + throw JoinError (_("Content to be joined must all have or not have video")); + } + if (need_audio != static_cast ((*i)->audio)) { + throw JoinError (_("Content to be joined must all have or not have audio")); + } + if (need_text != !(*i)->text.empty()) { + throw JoinError (_("Content to be joined must all have or not have subtitles or captions")); + } + ++i; + } + + if (need_video) { + video.reset (new VideoContent (this, c)); + } + if (need_audio) { + audio.reset (new AudioContent (this, c)); + } + if (need_text) { + text.push_back (shared_ptr (new TextContent (this, c))); + } + shared_ptr ref = dynamic_pointer_cast (c[0]); DCPOMATIC_ASSERT (ref); for (size_t i = 0; i < c.size(); ++i) { shared_ptr fc = dynamic_pointer_cast (c[i]); - if (fc->use_subtitles() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) { + if (fc->only_text() && fc->only_text()->use() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) { throw JoinError (_("Content to be joined must use the same subtitle stream.")); } } + /* XXX: should probably check that more of the stuff below is the same in *this and ref */ + _subtitle_streams = ref->subtitle_streams (); _subtitle_stream = ref->subtitle_stream (); - _audio_streams = ref->ffmpeg_audio_streams (); _first_video = ref->_first_video; + _filters = ref->_filters; + _color_range = ref->_color_range; + _color_primaries = ref->_color_primaries; + _color_trc = ref->_color_trc; + _colorspace = ref->_colorspace; + _bits_per_pixel = ref->_bits_per_pixel; + _encrypted = ref->_encrypted; } void -FFmpegContent::as_xml (xmlpp::Node* node) const +FFmpegContent::as_xml (xmlpp::Node* node, bool with_paths) const { node->add_child("Type")->add_child_text ("FFmpeg"); - Content::as_xml (node); - VideoContent::as_xml (node); - AudioContent::as_xml (node); - SubtitleContent::as_xml (node); + Content::as_xml (node, with_paths); + + if (video) { + video->as_xml (node); + } + + if (audio) { + audio->as_xml (node); + + BOOST_FOREACH (AudioStreamPtr i, audio->streams ()) { + shared_ptr f = dynamic_pointer_cast (i); + DCPOMATIC_ASSERT (f); + f->as_xml (node->add_child("AudioStream")); + } + } + + if (only_text()) { + only_text()->as_xml (node); + } boost::mutex::scoped_lock lm (_mutex); @@ -135,10 +224,6 @@ FFmpegContent::as_xml (xmlpp::Node* node) const (*i)->as_xml (t); } - for (vector >::const_iterator i = _audio_streams.begin(); i != _audio_streams.end(); ++i) { - (*i)->as_xml (node->add_child("AudioStream")); - } - for (vector::const_iterator i = _filters.begin(); i != _filters.end(); ++i) { node->add_child("Filter")->add_child_text ((*i)->id ()); } @@ -146,50 +231,113 @@ FFmpegContent::as_xml (xmlpp::Node* node) const if (_first_video) { node->add_child("FirstVideo")->add_child_text (raw_convert (_first_video.get().get())); } + + if (_color_range) { + node->add_child("ColorRange")->add_child_text (raw_convert (static_cast (*_color_range))); + } + if (_color_primaries) { + node->add_child("ColorPrimaries")->add_child_text (raw_convert (static_cast (*_color_primaries))); + } + if (_color_trc) { + node->add_child("ColorTransferCharacteristic")->add_child_text (raw_convert (static_cast (*_color_trc))); + } + if (_colorspace) { + node->add_child("Colorspace")->add_child_text (raw_convert (static_cast (*_colorspace))); + } + if (_bits_per_pixel) { + node->add_child("BitsPerPixel")->add_child_text (raw_convert (*_bits_per_pixel)); + } + if (_decryption_key) { + node->add_child("DecryptionKey")->add_child_text (_decryption_key.get()); + } + if (_encrypted) { + node->add_child("Encypted")->add_child_text ("1"); + } } void -FFmpegContent::examine (shared_ptr job) +FFmpegContent::examine (shared_ptr film, shared_ptr job) { + ChangeSignaller cc1 (this, FFmpegContentProperty::SUBTITLE_STREAMS); + ChangeSignaller cc2 (this, FFmpegContentProperty::SUBTITLE_STREAM); + job->set_progress_unknown (); - Content::examine (job); + Content::examine (film, job); shared_ptr examiner (new FFmpegExaminer (shared_from_this (), job)); - take_from_video_examiner (examiner); - shared_ptr film = _film.lock (); - DCPOMATIC_ASSERT (film); + if (examiner->has_video ()) { + video.reset (new VideoContent (this)); + video->take_from_examiner (examiner); + } + + boost::filesystem::path first_path = path (0); { boost::mutex::scoped_lock lm (_mutex); + if (examiner->has_video ()) { + _first_video = examiner->first_video (); + _color_range = examiner->color_range (); + _color_primaries = examiner->color_primaries (); + _color_trc = examiner->color_trc (); + _colorspace = examiner->colorspace (); + _bits_per_pixel = examiner->bits_per_pixel (); + + if (examiner->rotation()) { + double rot = *examiner->rotation (); + if (fabs (rot - 180) < 1.0) { + _filters.push_back (Filter::from_id ("vflip")); + _filters.push_back (Filter::from_id ("hflip")); + } else if (fabs (rot - 90) < 1.0) { + _filters.push_back (Filter::from_id ("90clock")); + } else if (fabs (rot - 270) < 1.0) { + _filters.push_back (Filter::from_id ("90anticlock")); + } + } + } + + if (!examiner->audio_streams().empty ()) { + audio.reset (new AudioContent (this)); + + BOOST_FOREACH (shared_ptr i, examiner->audio_streams ()) { + audio->add_stream (i); + } + + AudioStreamPtr as = audio->streams().front(); + AudioMapping m = as->mapping (); + m.make_default (film ? film->audio_processor() : 0, first_path); + as->set_mapping (m); + } + _subtitle_streams = examiner->subtitle_streams (); if (!_subtitle_streams.empty ()) { + text.clear (); + text.push_back (shared_ptr (new TextContent (this, TEXT_OPEN_SUBTITLE, TEXT_UNKNOWN))); _subtitle_stream = _subtitle_streams.front (); } - - _audio_streams = examiner->audio_streams (); - - if (!_audio_streams.empty ()) { - AudioMapping m = _audio_streams.front()->mapping (); - film->make_audio_mapping_default (m); - _audio_streams.front()->set_mapping (m); - } - _first_video = examiner->first_video (); + _encrypted = first_path.extension() == ".ecinema"; } - signal_changed (FFmpegContentProperty::SUBTITLE_STREAMS); - signal_changed (FFmpegContentProperty::SUBTITLE_STREAM); - signal_changed (AudioContentProperty::AUDIO_STREAMS); + if (examiner->has_video ()) { + set_default_colour_conversion (); + } } string FFmpegContent::summary () const { - /* Get the string() here so that the name does not have quotes around it */ - return String::compose (_("%1 [movie]"), path_summary ()); + if (video && audio) { + return String::compose (_("%1 [movie]"), path_summary ()); + } else if (video) { + return String::compose (_("%1 [video]"), path_summary ()); + } else if (audio) { + return String::compose (_("%1 [audio]"), path_summary ()); + } + + return path_summary (); } string @@ -210,24 +358,31 @@ FFmpegContent::technical_summary () const } string filt = Filter::ffmpeg_string (_filters); - - return Content::technical_summary() + " - " - + VideoContent::technical_summary() + " - " - + AudioContent::technical_summary() + " - " - + String::compose ( - "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt - ); + + string s = Content::technical_summary (); + + if (video) { + s += " - " + video->technical_summary (); + } + + if (audio) { + s += " - " + audio->technical_summary (); + } + + return s + String::compose ( + "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt + ); } void FFmpegContent::set_subtitle_stream (shared_ptr s) { + ChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM); + { boost::mutex::scoped_lock lm (_mutex); _subtitle_stream = s; } - - signal_changed (FFmpegContentProperty::SUBTITLE_STREAM); } bool @@ -243,82 +398,291 @@ operator!= (FFmpegStream const & a, FFmpegStream const & b) } DCPTime -FFmpegContent::full_length () const +FFmpegContent::full_length (shared_ptr film) const { - shared_ptr film = _film.lock (); - DCPOMATIC_ASSERT (film); - FrameRateChange const frc (video_frame_rate (), film->video_frame_rate ()); - return DCPTime::from_frames (rint (video_length_after_3d_combine() * frc.factor()), film->video_frame_rate()); + FrameRateChange const frc (film, shared_from_this()); + if (video) { + return DCPTime::from_frames (llrint (video->length_after_3d_combine() * frc.factor()), film->video_frame_rate()); + } + + if (audio) { + DCPTime longest; + BOOST_FOREACH (AudioStreamPtr i, audio->streams()) { + longest = max (longest, DCPTime::from_frames(llrint(i->length() / frc.speed_up), i->frame_rate())); + } + return longest; + } + + /* XXX: subtitle content? */ + + return DCPTime(); +} + +DCPTime +FFmpegContent::approximate_length () const +{ + if (video) { + return DCPTime::from_frames (video->length_after_3d_combine(), 24); + } + + DCPOMATIC_ASSERT (audio); + + Frame longest = 0; + BOOST_FOREACH (AudioStreamPtr i, audio->streams ()) { + longest = max (longest, Frame(llrint(i->length()))); + } + + return DCPTime::from_frames (longest, 24); } void FFmpegContent::set_filters (vector const & filters) { + ChangeSignaller cc (this, FFmpegContentProperty::FILTERS); + { boost::mutex::scoped_lock lm (_mutex); _filters = filters; } - - signal_changed (FFmpegContentProperty::FILTERS); } string FFmpegContent::identifier () const { - SafeStringStream s; + string s = Content::identifier(); - s << VideoContent::identifier(); + if (video) { + s += "_" + video->identifier(); + } + + if (only_text() && only_text()->use() && only_text()->burn()) { + s += "_" + only_text()->identifier(); + } boost::mutex::scoped_lock lm (_mutex); if (_subtitle_stream) { - s << "_" << _subtitle_stream->identifier (); + s += "_" + _subtitle_stream->identifier (); } for (vector::const_iterator i = _filters.begin(); i != _filters.end(); ++i) { - s << "_" << (*i)->id (); + s += "_" + (*i)->id (); } - return s.str (); + return s; } -list -FFmpegContent::subtitles_during (ContentTimePeriod period, bool starting) const +void +FFmpegContent::set_default_colour_conversion () { - shared_ptr stream = subtitle_stream (); - if (!stream) { - return list (); - } + DCPOMATIC_ASSERT (video); - return stream->subtitles_during (period, starting); + dcp::Size const s = video->size (); + + boost::mutex::scoped_lock lm (_mutex); + + switch (_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)) { + case AVCOL_SPC_RGB: + video->set_colour_conversion (PresetColourConversion::from_id ("srgb").conversion); + break; + case AVCOL_SPC_BT709: + video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion); + break; + case AVCOL_SPC_BT470BG: + case AVCOL_SPC_SMPTE170M: + case AVCOL_SPC_SMPTE240M: + video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion); + break; + case AVCOL_SPC_BT2020_CL: + case AVCOL_SPC_BT2020_NCL: + video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion); + break; + default: + if (s.width < 1080) { + video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion); + } else { + video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion); + } + break; + } } -bool -FFmpegContent::has_subtitles () const +void +FFmpegContent::add_properties (shared_ptr film, list& p) const { - return !subtitle_streams().empty (); + Content::add_properties (film, p); + + if (video) { + video->add_properties (p); + + if (_bits_per_pixel) { + int const sub = 219 * pow (2, _bits_per_pixel.get() - 8); + int const total = pow (2, _bits_per_pixel.get()); + + switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) { + case AVCOL_RANGE_UNSPECIFIED: + /// TRANSLATORS: this means that the range of pixel values used in this + /// file is unknown (not specified in the file). + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified"))); + break; + case AVCOL_RANGE_MPEG: + /// TRANSLATORS: this means that the range of pixel values used in this + /// file is limited, so that not all possible values are valid. + p.push_back ( + UserProperty ( + UserProperty::VIDEO, _("Colour range"), String::compose (_("Limited (%1-%2)"), (total - sub) / 2, (total + sub) / 2) + ) + ); + break; + case AVCOL_RANGE_JPEG: + /// TRANSLATORS: this means that the range of pixel values used in this + /// file is full, so that all possible pixel values are valid. + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), String::compose (_("Full (0-%1)"), total))); + break; + default: + DCPOMATIC_ASSERT (false); + } + } else { + switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) { + case AVCOL_RANGE_UNSPECIFIED: + /// TRANSLATORS: this means that the range of pixel values used in this + /// file is unknown (not specified in the file). + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified"))); + break; + case AVCOL_RANGE_MPEG: + /// TRANSLATORS: this means that the range of pixel values used in this + /// file is limited, so that not all possible values are valid. + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Limited"))); + break; + case AVCOL_RANGE_JPEG: + /// TRANSLATORS: this means that the range of pixel values used in this + /// file is full, so that all possible pixel values are valid. + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Full"))); + break; + default: + DCPOMATIC_ASSERT (false); + } + } + + char const * primaries[] = { + _("Unspecified"), + _("BT709"), + _("Unspecified"), + _("Unspecified"), + _("BT470M"), + _("BT470BG"), + _("SMPTE 170M (BT601)"), + _("SMPTE 240M"), + _("Film"), + _("BT2020"), + _("SMPTE ST 428-1 (CIE 1931 XYZ)"), + _("SMPTE ST 431-2 (2011)"), + _("SMPTE ST 432-1 D65 (2010)"), // 12 + "", // 13 + "", // 14 + "", // 15 + "", // 16 + "", // 17 + "", // 18 + "", // 19 + "", // 20 + "", // 21 + _("JEDEC P22") + }; + + DCPOMATIC_ASSERT (AVCOL_PRI_NB <= 23); + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour primaries"), primaries[_color_primaries.get_value_or(AVCOL_PRI_UNSPECIFIED)])); + + char const * transfers[] = { + _("Unspecified"), + _("BT709"), + _("Unspecified"), + _("Unspecified"), + _("Gamma 22 (BT470M)"), + _("Gamma 28 (BT470BG)"), + _("SMPTE 170M (BT601)"), + _("SMPTE 240M"), + _("Linear"), + _("Logarithmic (100:1 range)"), + _("Logarithmic (316:1 range)"), + _("IEC61966-2-4"), + _("BT1361 extended colour gamut"), + _("IEC61966-2-1 (sRGB or sYCC)"), + _("BT2020 for a 10-bit system"), + _("BT2020 for a 12-bit system"), + _("SMPTE ST 2084 for 10, 12, 14 and 16 bit systems"), + _("SMPTE ST 428-1"), + _("ARIB STD-B67 ('Hybrid log-gamma')") + }; + + DCPOMATIC_ASSERT (AVCOL_TRC_NB <= 19); + p.push_back (UserProperty (UserProperty::VIDEO, _("Colour transfer characteristic"), transfers[_color_trc.get_value_or(AVCOL_TRC_UNSPECIFIED)])); + + char const * spaces[] = { + _("RGB / sRGB (IEC61966-2-1)"), + _("BT709"), + _("Unspecified"), + _("Unspecified"), + _("FCC"), + _("BT470BG (BT601-6)"), + _("SMPTE 170M (BT601-6)"), + _("SMPTE 240M"), + _("YCOCG"), + _("BT2020 non-constant luminance"), + _("BT2020 constant luminance"), + _("SMPTE 2085, Y'D'zD'x"), + _("Chroma-derived non-constant luminance"), + _("Chroma-derived constant luminance"), + _("BT2100") + }; + + DCPOMATIC_ASSERT (AVCOL_SPC_NB == 15); + p.push_back (UserProperty (UserProperty::VIDEO, _("Colourspace"), spaces[_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)])); + + if (_bits_per_pixel) { + p.push_back (UserProperty (UserProperty::VIDEO, _("Bits per pixel"), *_bits_per_pixel)); + } + } + + if (audio) { + audio->add_properties (film, p); + } } +/** Our subtitle streams have colour maps, which can be changed, but + * they have no way of signalling that change. As a hack, we have this + * method which callers can use when they've modified one of our subtitle + * streams. + */ void -FFmpegContent::set_default_colour_conversion () +FFmpegContent::signal_subtitle_stream_changed () { - dcp::Size const s = video_size (); + /* XXX: this is too late; really it should be before the change */ + ChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM); +} - boost::mutex::scoped_lock lm (_mutex); +vector > +FFmpegContent::ffmpeg_audio_streams () const +{ + vector > fa; - if (s.width < 1080) { - _colour_conversion = PresetColourConversion::from_id ("rec601").conversion; - } else { - _colour_conversion = PresetColourConversion::from_id ("rec709").conversion; + if (audio) { + BOOST_FOREACH (AudioStreamPtr i, audio->streams()) { + fa.push_back (dynamic_pointer_cast (i)); + } } + + return fa; } -vector -FFmpegContent::audio_streams () const +void +FFmpegContent::take_settings_from (shared_ptr c) { - boost::mutex::scoped_lock lm (_mutex); - - vector s; - copy (_audio_streams.begin(), _audio_streams.end(), back_inserter (s)); - return s; + shared_ptr fc = dynamic_pointer_cast (c); + if (!fc) { + return; + } + + Content::take_settings_from (c); + _filters = fc->_filters; }