2 Copyright (C) 2014-2018 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 "text_decoder.h"
28 #include "ffmpeg_image_proxy.h"
34 #include <dcp/mono_picture_asset.h>
35 #include <dcp/mono_picture_asset_reader.h>
36 #include <dcp/stereo_picture_asset.h>
37 #include <dcp/stereo_picture_asset_reader.h>
38 #include <dcp/reel_picture_asset.h>
39 #include <dcp/reel_sound_asset.h>
40 #include <dcp/reel_subtitle_asset.h>
41 #include <dcp/reel_closed_caption_asset.h>
42 #include <dcp/mono_picture_frame.h>
43 #include <dcp/stereo_picture_frame.h>
44 #include <dcp/sound_frame.h>
45 #include <dcp/sound_asset_reader.h>
46 #include <dcp/subtitle_image.h>
47 #include <boost/foreach.hpp>
54 using boost::shared_ptr;
55 using boost::dynamic_pointer_cast;
56 using boost::optional;
58 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log, bool fast)
60 , _decode_referenced (false)
63 video.reset (new VideoDecoder (this, c, log));
66 audio.reset (new AudioDecoder (this, c->audio, log, fast));
68 BOOST_FOREACH (shared_ptr<TextContent> i, c->text) {
69 /* XXX: this time here should be the time of the first subtitle, not 0 */
70 text.push_back (shared_ptr<TextDecoder> (new TextDecoder (this, i, log, ContentTime())));
73 list<shared_ptr<dcp::CPL> > cpl_list = cpls ();
75 if (cpl_list.empty()) {
76 throw DCPError (_("No CPLs found in DCP."));
79 shared_ptr<dcp::CPL> cpl;
80 BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpl_list) {
81 if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) {
87 /* No CPL found; probably an old file that doesn't specify it;
88 just use the first one.
90 cpl = cpls().front ();
93 set_decode_referenced (false);
95 _reels = cpl->reels ();
97 _reel = _reels.begin ();
106 if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
110 double const vfr = _dcp_content->active_video_frame_rate ();
112 /* Frame within the (played part of the) reel that is coming up next */
113 int64_t const frame = _next.frames_round (vfr);
115 shared_ptr<dcp::PictureAsset> picture_asset = (*_reel)->main_picture()->asset();
116 DCPOMATIC_ASSERT (picture_asset);
118 /* We must emit texts first as when we emit the video for this frame
119 it will expect already to have the texts.
121 pass_texts (_next, picture_asset->size());
123 if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) {
124 int64_t const entry_point = (*_reel)->main_picture()->entry_point ();
127 shared_ptr<ImageProxy> (
129 _mono_reader->get_frame (entry_point + frame),
130 picture_asset->size(),
139 shared_ptr<ImageProxy> (
141 _stereo_reader->get_frame (entry_point + frame),
142 picture_asset->size(),
152 shared_ptr<ImageProxy> (
154 _stereo_reader->get_frame (entry_point + frame),
155 picture_asset->size(),
166 if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) {
167 int64_t const entry_point = (*_reel)->main_sound()->entry_point ();
168 shared_ptr<const dcp::SoundFrame> sf = _sound_reader->get_frame (entry_point + frame);
169 uint8_t const * from = sf->data ();
171 int const channels = _dcp_content->audio->stream()->channels ();
172 int const frames = sf->size() / (3 * channels);
173 shared_ptr<AudioBuffers> data (new AudioBuffers (channels, frames));
174 float** data_data = data->data();
175 for (int i = 0; i < frames; ++i) {
176 for (int j = 0; j < channels; ++j) {
177 data_data[j][i] = static_cast<int> ((from[0] << 8) | (from[1] << 16) | (from[2] << 24)) / static_cast<float> (INT_MAX - 256);
182 audio->emit (_dcp_content->audio->stream(), data, ContentTime::from_frames (_offset, vfr) + _next);
185 _next += ContentTime::from_frames (1, vfr);
187 if ((*_reel)->main_picture ()) {
188 if (_next.frames_round (vfr) >= (*_reel)->main_picture()->duration()) {
190 _next = ContentTime ();
198 DCPDecoder::pass_texts (ContentTime next, dcp::Size size)
200 list<shared_ptr<TextDecoder> >::const_iterator decoder = text.begin ();
201 if ((*_reel)->main_subtitle()) {
202 DCPOMATIC_ASSERT (decoder != text.end ());
204 next, (*_reel)->main_subtitle()->asset(), _dcp_content->reference_text(TEXT_OPEN_SUBTITLE), (*_reel)->main_subtitle()->entry_point(), *decoder, size
208 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> i, (*_reel)->closed_captions()) {
209 DCPOMATIC_ASSERT (decoder != text.end ());
211 next, i->asset(), _dcp_content->reference_text(TEXT_CLOSED_CAPTION), i->entry_point(), *decoder, size
218 DCPDecoder::pass_texts (ContentTime next, shared_ptr<dcp::SubtitleAsset> asset, bool reference, int64_t entry_point, shared_ptr<TextDecoder> decoder, dcp::Size size)
220 double const vfr = _dcp_content->active_video_frame_rate ();
221 /* Frame within the (played part of the) reel that is coming up next */
222 int64_t const frame = next.frames_round (vfr);
224 if (_decode_referenced || !reference) {
225 list<shared_ptr<dcp::Subtitle> > subs = asset->subtitles_during (
226 dcp::Time (entry_point + frame, vfr, vfr),
227 dcp::Time (entry_point + frame + 1, vfr, vfr),
231 BOOST_FOREACH (shared_ptr<dcp::Subtitle> i, subs) {
232 shared_ptr<dcp::SubtitleString> is = dynamic_pointer_cast<dcp::SubtitleString> (i);
234 list<dcp::SubtitleString> s;
236 decoder->emit_plain (
238 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->in().as_seconds ()),
239 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->out().as_seconds ())
245 shared_ptr<dcp::SubtitleImage> ii = dynamic_pointer_cast<dcp::SubtitleImage> (i);
247 FFmpegImageProxy proxy (ii->png_image());
248 shared_ptr<Image> image = proxy.image().first;
249 /* set up rect with height and width */
250 dcpomatic::Rect<double> rect(0, 0, image->size().width / double(size.width), image->size().height / double(size.height));
252 /* add in position */
254 switch (ii->h_align()) {
255 case dcp::HALIGN_LEFT:
256 rect.x += ii->h_position();
258 case dcp::HALIGN_CENTER:
259 rect.x += 0.5 + ii->h_position() - rect.width / 2;
261 case dcp::HALIGN_RIGHT:
262 rect.x += 1 - ii->h_position() - rect.width;
266 switch (ii->v_align()) {
267 case dcp::VALIGN_TOP:
268 rect.y += ii->v_position();
270 case dcp::VALIGN_CENTER:
271 rect.y += 0.5 + ii->v_position() - rect.height / 2;
273 case dcp::VALIGN_BOTTOM:
274 rect.y += 1 - ii->v_position() - rect.height;
278 decoder->emit_bitmap (
280 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->in().as_seconds ()),
281 ContentTime::from_frames (_offset - entry_point, vfr) + ContentTime::from_seconds (i->out().as_seconds ())
291 DCPDecoder::next_reel ()
293 _offset += (*_reel)->main_picture()->duration();
299 DCPDecoder::get_readers ()
301 if (_reel == _reels.end() || !_dcp_content->can_be_played ()) {
302 _mono_reader.reset ();
303 _stereo_reader.reset ();
304 _sound_reader.reset ();
308 if ((*_reel)->main_picture()) {
309 shared_ptr<dcp::PictureAsset> asset = (*_reel)->main_picture()->asset ();
310 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
311 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
312 DCPOMATIC_ASSERT (mono || stereo);
314 _mono_reader = mono->start_read ();
315 _stereo_reader.reset ();
317 _stereo_reader = stereo->start_read ();
318 _mono_reader.reset ();
321 _mono_reader.reset ();
322 _stereo_reader.reset ();
325 if ((*_reel)->main_sound()) {
326 _sound_reader = (*_reel)->main_sound()->asset()->start_read ();
328 _sound_reader.reset ();
333 DCPDecoder::seek (ContentTime t, bool accurate)
335 if (!_dcp_content->can_be_played ()) {
339 Decoder::seek (t, accurate);
341 _reel = _reels.begin ();
345 int const pre_roll_seconds = 2;
347 /* Pre-roll for subs */
349 ContentTime pre = t - ContentTime::from_seconds (pre_roll_seconds);
350 if (pre < ContentTime()) {
351 pre = ContentTime ();
354 /* Seek to pre-roll position */
356 while (_reel != _reels.end() && pre >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
357 ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
363 /* Pass texts in the pre-roll */
365 double const vfr = _dcp_content->active_video_frame_rate ();
366 for (int i = 0; i < pre_roll_seconds * vfr; ++i) {
367 pass_texts (pre, (*_reel)->main_picture()->asset()->size());
368 pre += ContentTime::from_frames (1, vfr);
371 /* Seek to correct position */
373 while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ())) {
374 t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate ());
382 DCPDecoder::set_decode_referenced (bool r)
384 _decode_referenced = r;
387 video->set_ignore (_dcp_content->reference_video() && !_decode_referenced);
390 audio->set_ignore (_dcp_content->reference_audio() && !_decode_referenced);
395 DCPDecoder::set_forced_reduction (optional<int> reduction)
397 _forced_reduction = reduction;