2 Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "dcp_decoder.h"
22 #include "dcp_content.h"
23 #include "audio_content.h"
24 #include "video_decoder.h"
25 #include "audio_decoder.h"
26 #include "j2k_image_proxy.h"
27 #include "subtitle_decoder.h"
33 #include <dcp/mono_picture_asset.h>
34 #include <dcp/mono_picture_asset_reader.h>
35 #include <dcp/stereo_picture_asset.h>
36 #include <dcp/stereo_picture_asset_reader.h>
37 #include <dcp/reel_picture_asset.h>
38 #include <dcp/reel_sound_asset.h>
39 #include <dcp/reel_subtitle_asset.h>
40 #include <dcp/mono_picture_frame.h>
41 #include <dcp/stereo_picture_frame.h>
42 #include <dcp/sound_frame.h>
43 #include <dcp/sound_asset_reader.h>
44 #include <boost/foreach.hpp>
49 using boost::shared_ptr;
50 using boost::dynamic_pointer_cast;
52 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
54 , _decode_referenced (false)
56 video.reset (new VideoDecoder (this, c, log));
57 audio.reset (new AudioDecoder (this, c->audio, log));
59 subtitle.reset (new SubtitleDecoder (this, c->subtitle, log));
61 shared_ptr<dcp::CPL> cpl;
62 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls ()) {
63 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
69 /* No CPL found; probably an old file that doesn't specify it;
70 just use the first one.
72 cpl = cpls().front ();
75 _reels = cpl->reels ();
77 _reel = _reels.begin ();
85 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
89 double const vfr = _dcp_content->active_video_frame_rate ();
91 /* Frame within the (played part of the) reel that is coming up next */
92 int64_t const frame = _next.frames_round (vfr);
94 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
95 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
96 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
99 shared_ptr<ImageProxy> (
100 new J2KImageProxy (_mono_reader->get_frame (entry_point + frame), asset->size(), AV_PIX_FMT_XYZ12LE)
106 shared_ptr<ImageProxy> (
107 new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT, AV_PIX_FMT_XYZ12LE)),
112 shared_ptr<ImageProxy> (
113 new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT, AV_PIX_FMT_XYZ12LE)),
119 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
120 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
121 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
122 uint8_t const * from = sf->data ();
124 int const channels = _dcp_content->audio->stream()->channels ();
125 int const frames = sf->size() / (3 * channels);
126 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
127 float** data_data = data->data();
128 for (int i = 0; i < frames; ++i) {
129 for (int j = 0; j < channels; ++j) {
130 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
135 audio->emit (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
138 if ((*_reel)->main_subtitle() && (_decode_referenced || !_dcp_content->reference_subtitle())) {
139 int64_t const entry_point = (*_reel)->main_subtitle()->entry_point ();
140 list<dcp::SubtitleString> subs = (*_reel)->main_subtitle()->asset()->subtitles_during (
141 dcp::Time (entry_point + frame, vfr, vfr),
142 dcp::Time (entry_point + frame + 1, vfr, vfr),
146 if (!subs.empty ()) {
147 /* XXX: assuming that all `subs' are at the same time; maybe this is ok */
148 subtitle->emit_text (
150 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().in().as_seconds ()),
151 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (subs.front().out().as_seconds ())
158 _next += ContentTime::from_frames (1, vfr);
160 if ((*_reel)->main_picture ()) {
161 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
163 _next = ContentTime ();
171 DCPDecoder::next_reel ()
173 _offset += (*_reel)->main_picture()->duration();
179 DCPDecoder::get_readers ()
181 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
182 _mono_reader.reset ();
183 _stereo_reader.reset ();
184 _sound_reader.reset ();
188 if ((*_reel)->main_picture()) {
189 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
190 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
191 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
192 DCPOMATIC_ASSERT (mono || stereo);
194 _mono_reader = mono->start_read ();
195 _stereo_reader.reset ();
197 _stereo_reader = stereo->start_read ();
198 _mono_reader.reset ();
201 _mono_reader.reset ();
202 _stereo_reader.reset ();
205 if ((*_reel)->main_sound()) {
206 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
208 _sound_reader.reset ();
213 DCPDecoder::seek (ContentTime t, bool accurate)
215 Decoder::seek (t, accurate);
217 _reel = _reels.begin ();
221 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
222 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
230 DCPDecoder::set_decode_referenced ()
232 _decode_referenced = true;