X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fvideo_decoder.cc;h=88f88c1296a16c35c833c36172cc438fdaa61804;hp=e4d5516a17ab020008cd02d7f665727d4f5db46e;hb=aeb835a18c8df347e0ed68fb24631b320abeb611;hpb=79ce26d031d109177ba4b0f637fa2960345a37a3 diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc index e4d5516a1..88f88c129 100644 --- a/src/lib/video_decoder.cc +++ b/src/lib/video_decoder.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2015 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 @@ -19,43 +19,322 @@ #include "video_decoder.h" #include "image.h" +#include "raw_image_proxy.h" +#include "film.h" +#include "log.h" +#include "compose.hpp" +#include #include "i18n.h" using std::cout; +using std::list; +using std::max; +using std::back_inserter; using boost::shared_ptr; using boost::optional; -VideoDecoder::VideoDecoder (shared_ptr f, shared_ptr c) - : Decoder (f) +VideoDecoder::VideoDecoder (shared_ptr c) +#ifdef DCPOMATIC_DEBUG + : test_gaps (0) , _video_content (c) +#else + : _video_content (c) +#endif + , _last_seek_accurate (true) + , _ignore_video (false) { + _black_image.reset (new Image (PIX_FMT_RGB24, _video_content->video_size(), true)); + _black_image->make_black (); +} + +list +VideoDecoder::decoded_video (Frame frame) +{ + list output; + + for (list::const_iterator i = _decoded_video.begin(); i != _decoded_video.end(); ++i) { + if (i->frame == frame) { + output.push_back (*i); + } + } + + return output; +} + +/** Get all frames which exist in the content at a given frame index. + * @param frame Frame index. + * @param accurate true to try hard to return frames at the precise time that was requested, otherwise frames nearby may be returned. + * @return Frames; there may be none (if there is no video there), 1 for 2D or 2 for 3D. + */ +list +VideoDecoder::get_video (Frame frame, bool accurate) +{ + /* At this stage, if we have get_video()ed before, _decoded_video will contain the last frame that this + method returned (and possibly a few more). If the requested frame is not in _decoded_video and it is not the next + one after the end of _decoded_video we need to seek. + */ + + _video_content->film()->log()->log (String::compose ("VD has request for %1", frame), LogEntry::TYPE_DEBUG_DECODE); + + if (_decoded_video.empty() || frame < _decoded_video.front().frame || frame > (_decoded_video.back().frame + 1)) { + seek (ContentTime::from_frames (frame, _video_content->video_frame_rate()), accurate); + } + + list dec; + + /* Now enough pass() calls should either: + * (a) give us what we want, or + * (b) give us something after what we want, indicating that we will never get what we want, or + * (c) hit the end of the decoder. + */ + if (accurate) { + /* We are being accurate, so we want the right frame. + * This could all be one statement but it's split up for clarity. + */ + while (true) { + if (!decoded_video(frame).empty ()) { + /* We got what we want */ + break; + } + + if (pass ()) { + /* The decoder has nothing more for us */ + break; + } + + if (!_decoded_video.empty() && _decoded_video.front().frame > frame) { + /* We're never going to get the frame we want. Perhaps the caller is asking + * for a video frame before the content's video starts (if its audio + * begins before its video, for example). + */ + break; + } + } + + dec = decoded_video (frame); + } else { + /* Any frame will do: use the first one that comes out of pass() */ + while (_decoded_video.empty() && !pass ()) {} + if (!_decoded_video.empty ()) { + dec.push_back (_decoded_video.front ()); + } + } + + /* Clean up _decoded_video; keep the frame we are returning (which may have two images + for 3D), but nothing before that */ + while (!_decoded_video.empty() && _decoded_video.front().frame < dec.front().frame) { + _decoded_video.pop_front (); + } + return dec; +} + +/** Fill _decoded_video from `from' up to, but not including, `to' with + * a frame for one particular Eyes value (which could be EYES_BOTH, + * EYES_LEFT or EYES_RIGHT) + */ +void +VideoDecoder::fill_one_eye (Frame from, Frame to, Eyes eye) +{ + if (to == 0) { + /* Already OK */ + return; + } + + /* Fill with black... */ + shared_ptr filler_image (new RawImageProxy (_black_image)); + Part filler_part = PART_WHOLE; + + /* ...unless there's some video we can fill with */ + if (!_decoded_video.empty ()) { + filler_image = _decoded_video.back().image; + filler_part = _decoded_video.back().part; + } + + for (Frame i = from; i < to; ++i) { +#ifdef DCPOMATIC_DEBUG + test_gaps++; +#endif + _decoded_video.push_back ( + ContentVideo (filler_image, eye, filler_part, i) + ); + } +} + +/** Fill _decoded_video from `from' up to, but not including, `to' + * adding both left and right eye frames. + */ +void +VideoDecoder::fill_both_eyes (Frame from, Frame to, Eyes eye) +{ + if (to == 0 && eye == EYES_LEFT) { + /* Already OK */ + return; + } + + /* Fill with black... */ + shared_ptr filler_left_image (new RawImageProxy (_black_image)); + shared_ptr filler_right_image (new RawImageProxy (_black_image)); + Part filler_left_part = PART_WHOLE; + Part filler_right_part = PART_WHOLE; + + /* ...unless there's some video we can fill with */ + for (list::const_reverse_iterator i = _decoded_video.rbegin(); i != _decoded_video.rend(); ++i) { + if (i->eyes == EYES_LEFT && !filler_left_image) { + filler_left_image = i->image; + filler_left_part = i->part; + } else if (i->eyes == EYES_RIGHT && !filler_right_image) { + filler_right_image = i->image; + filler_right_part = i->part; + } + + if (filler_left_image && filler_right_image) { + break; + } + } + + Frame filler_frame = from; + Eyes filler_eye = _decoded_video.empty() ? EYES_LEFT : _decoded_video.back().eyes; + + if (_decoded_video.empty ()) { + filler_frame = 0; + filler_eye = EYES_LEFT; + } else if (_decoded_video.back().eyes == EYES_LEFT) { + filler_frame = _decoded_video.back().frame; + filler_eye = EYES_RIGHT; + } else if (_decoded_video.back().eyes == EYES_RIGHT) { + filler_frame = _decoded_video.back().frame + 1; + filler_eye = EYES_LEFT; + } + + while (filler_frame != to || filler_eye != eye) { + +#ifdef DCPOMATIC_DEBUG + test_gaps++; +#endif + + _decoded_video.push_back ( + ContentVideo ( + filler_eye == EYES_LEFT ? filler_left_image : filler_right_image, + filler_eye, + filler_eye == EYES_LEFT ? filler_left_part : filler_right_part, + filler_frame + ) + ); + + if (filler_eye == EYES_LEFT) { + filler_eye = EYES_RIGHT; + } else { + filler_eye = EYES_LEFT; + ++filler_frame; + } + } } /** Called by subclasses when they have a video frame ready */ void -VideoDecoder::video (shared_ptr image, bool same, ContentTime time) +VideoDecoder::video (shared_ptr image, Frame frame) { + if (_ignore_video) { + return; + } + + _video_content->film()->log()->log (String::compose ("VD receives %1", frame), LogEntry::TYPE_DEBUG_DECODE); + + /* We may receive the same frame index twice for 3D, and we need to know + when that happens. + */ + bool const same = (!_decoded_video.empty() && frame == _decoded_video.back().frame); + + /* Work out what we are going to push into _decoded_video next */ + list to_push; switch (_video_content->video_frame_type ()) { case VIDEO_FRAME_TYPE_2D: - _pending.push_back (shared_ptr (new DecodedVideo (time, image, EYES_BOTH, same))); + to_push.push_back (ContentVideo (image, EYES_BOTH, PART_WHOLE, frame)); + break; + case VIDEO_FRAME_TYPE_3D_ALTERNATE: + to_push.push_back (ContentVideo (image, same ? EYES_RIGHT : EYES_LEFT, PART_WHOLE, frame)); break; case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT: - { - int const half = image->size().width / 2; - _pending.push_back (shared_ptr (new DecodedVideo (time, image->crop (Crop (0, half, 0, 0), true), EYES_LEFT, same))); - _pending.push_back (shared_ptr (new DecodedVideo (time, image->crop (Crop (half, 0, 0, 0), true), EYES_RIGHT, same))); + to_push.push_back (ContentVideo (image, EYES_LEFT, PART_LEFT_HALF, frame)); + to_push.push_back (ContentVideo (image, EYES_RIGHT, PART_RIGHT_HALF, frame)); break; - } case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM: - { - int const half = image->size().height / 2; - _pending.push_back (shared_ptr (new DecodedVideo (time, image->crop (Crop (0, 0, 0, half), true), EYES_LEFT, same))); - _pending.push_back (shared_ptr (new DecodedVideo (time, image->crop (Crop (0, 0, half, 0), true), EYES_RIGHT, same))); + to_push.push_back (ContentVideo (image, EYES_LEFT, PART_TOP_HALF, frame)); + to_push.push_back (ContentVideo (image, EYES_RIGHT, PART_BOTTOM_HALF, frame)); + break; + case VIDEO_FRAME_TYPE_3D_LEFT: + to_push.push_back (ContentVideo (image, EYES_LEFT, PART_WHOLE, frame)); + break; + case VIDEO_FRAME_TYPE_3D_RIGHT: + to_push.push_back (ContentVideo (image, EYES_RIGHT, PART_WHOLE, frame)); break; - } default: - assert (false); + DCPOMATIC_ASSERT (false); } + + /* Now VideoDecoder is required never to have gaps in the frames that it presents + via get_video(). Hence we need to fill in any gap between the last thing in _decoded_video + and the things we are about to push. + */ + + optional from; + optional to; + + if (_decoded_video.empty() && _last_seek_time && _last_seek_accurate) { + from = _last_seek_time->frames_round (_video_content->video_frame_rate ()); + to = to_push.front().frame; + } else if (!_decoded_video.empty ()) { + from = _decoded_video.back().frame + 1; + to = to_push.front().frame; + } + + /* If we've pre-rolled on a seek we may now receive out-of-order frames + (frames before the last seek time) which we can just ignore. + */ + + if (from && to && from.get() > to.get()) { + return; + } + + if (from) { + switch (_video_content->video_frame_type ()) { + case VIDEO_FRAME_TYPE_2D: + fill_one_eye (from.get(), to.get (), EYES_BOTH); + break; + case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT: + case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM: + case VIDEO_FRAME_TYPE_3D_ALTERNATE: + fill_both_eyes (from.get(), to.get(), to_push.front().eyes); + break; + case VIDEO_FRAME_TYPE_3D_LEFT: + fill_one_eye (from.get(), to.get (), EYES_LEFT); + break; + case VIDEO_FRAME_TYPE_3D_RIGHT: + fill_one_eye (from.get(), to.get (), EYES_RIGHT); + } + } + + copy (to_push.begin(), to_push.end(), back_inserter (_decoded_video)); + + /* We can't let this build up too much or we will run out of memory. We need to allow + the most frames that can exist between blocks of sound in a multiplexed file. + */ + DCPOMATIC_ASSERT (_decoded_video.size() <= 96); +} + +void +VideoDecoder::seek (ContentTime s, bool accurate) +{ + _decoded_video.clear (); + _last_seek_time = s; + _last_seek_accurate = accurate; +} + +/** Set this player never to produce any video data */ +void +VideoDecoder::set_ignore_video () +{ + _ignore_video = true; }