diff options
Diffstat (limited to 'src/lib/dcp_decoder.cc')
| -rw-r--r-- | src/lib/dcp_decoder.cc | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc new file mode 100644 index 000000000..bf016ef87 --- /dev/null +++ b/src/lib/dcp_decoder.cc @@ -0,0 +1,140 @@ +/* + Copyright (C) 2014 Carl Hetherington <cth@carlh.net> + + 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 + 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, + 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. + +*/ + +#include <dcp/dcp.h> +#include <dcp/cpl.h> +#include <dcp/reel.h> +#include <dcp/mono_picture_mxf.h> +#include <dcp/stereo_picture_mxf.h> +#include <dcp/reel_picture_asset.h> +#include <dcp/reel_sound_asset.h> +#include <dcp/mono_picture_frame.h> +#include <dcp/stereo_picture_frame.h> +#include <dcp/sound_frame.h> +#include "dcp_decoder.h" +#include "dcp_content.h" +#include "j2k_image_proxy.h" +#include "image.h" +#include "config.h" + +using std::list; +using std::cout; +using boost::shared_ptr; +using boost::dynamic_pointer_cast; + +DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log) + : VideoDecoder (c) + , AudioDecoder (c) + , SubtitleDecoder (c) + , _log (log) + , _dcp_content (c) +{ + dcp::DCP dcp (c->directory ()); + dcp.read (); + if (c->kdm ()) { + dcp.add (dcp::DecryptedKDM (c->kdm().get (), Config::instance()->decryption_private_key ())); + } + assert (dcp.cpls().size() == 1); + _reels = dcp.cpls().front()->reels (); + _reel = _reels.begin (); +} + +bool +DCPDecoder::pass () +{ + if (_reel == _reels.end () || !_dcp_content->can_be_played ()) { + return true; + } + + float const vfr = _dcp_content->video_frame_rate (); + int64_t const frame = _next.frames (vfr); + + if ((*_reel)->main_picture ()) { + shared_ptr<dcp::PictureMXF> mxf = (*_reel)->main_picture()->mxf (); + shared_ptr<dcp::MonoPictureMXF> mono = dynamic_pointer_cast<dcp::MonoPictureMXF> (mxf); + shared_ptr<dcp::StereoPictureMXF> stereo = dynamic_pointer_cast<dcp::StereoPictureMXF> (mxf); + int64_t const entry_point = (*_reel)->main_picture()->entry_point (); + if (mono) { + video (shared_ptr<ImageProxy> (new J2KImageProxy (mono->get_frame (entry_point + frame), mxf->size(), _log)), frame); + } else { + video ( + shared_ptr<ImageProxy> (new J2KImageProxy (stereo->get_frame (entry_point + frame), mxf->size(), dcp::EYE_LEFT, _log)), + frame + ); + + video ( + shared_ptr<ImageProxy> (new J2KImageProxy (stereo->get_frame (entry_point + frame), mxf->size(), dcp::EYE_RIGHT, _log)), + frame + ); + } + } + + if ((*_reel)->main_sound ()) { + int64_t const entry_point = (*_reel)->main_sound()->entry_point (); + shared_ptr<const dcp::SoundFrame> sf = (*_reel)->main_sound()->mxf()->get_frame (entry_point + frame); + uint8_t const * from = sf->data (); + + int const channels = _dcp_content->audio_channels (); + int const frames = sf->size() / (3 * channels); + shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames)); + for (int i = 0; i < frames; ++i) { + for (int j = 0; j < channels; ++j) { + data->data()[j][i] = float (from[0] | (from[1] << 8) | (from[2] << 16)) / (1 << 23); + from += 3; + } + } + + audio (data, _next); + } + + /* XXX: subtitle */ + + _next += ContentTime::from_frames (1, vfr); + + if ((*_reel)->main_picture ()) { + if (_next.frames (vfr) >= (*_reel)->main_picture()->duration()) { + ++_reel; + } + } + + return false; +} + +void +DCPDecoder::seek (ContentTime t, bool accurate) +{ + VideoDecoder::seek (t, accurate); + AudioDecoder::seek (t, accurate); + SubtitleDecoder::seek (t, accurate); + + _reel = _reels.begin (); + while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->video_frame_rate ())) { + t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->video_frame_rate ()); + ++_reel; + } + + _next = t; +} + + +list<ContentTimePeriod> +DCPDecoder::subtitles_during (ContentTimePeriod, bool starting) const +{ + return list<ContentTimePeriod> (); +} |