/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 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
*/
#include "video_decoder.h"
-#include "subtitle.h"
-#include "film.h"
#include "image.h"
-#include "ratio.h"
+#include "content_video.h"
#include "i18n.h"
using std::cout;
+using std::list;
using boost::shared_ptr;
+using boost::optional;
-VideoDecoder::VideoDecoder (shared_ptr<const Film> f, shared_ptr<const VideoContent> c)
- : Decoder (f)
- , _next_video (0)
- , _video_content (c)
- , _frame_rate_conversion (c->video_frame_rate(), f->dcp_video_frame_rate())
- , _odd (false)
+VideoDecoder::VideoDecoder (shared_ptr<const VideoContent> c)
+ : _video_content (c)
{
}
-/** Called by subclasses when some video is ready.
- * @param image frame to emit.
- * @param same true if this frame is the same as the last one passed to this call.
- * @param t Time of the frame within the source.
- */
-void
-VideoDecoder::video (shared_ptr<Image> image, bool same, Time t)
+optional<ContentVideo>
+VideoDecoder::decoded_video (VideoFrame frame)
{
- if (_frame_rate_conversion.skip && _odd) {
- _odd = !_odd;
- return;
- }
-
- image->crop (_video_content->crop(), true);
-
- shared_ptr<const Film> film = _film.lock ();
- assert (film);
-
- libdcp::Size const container_size = film->container()->size (film->full_frame ());
- libdcp::Size const image_size = _video_content->ratio()->size (container_size);
-
- shared_ptr<Image> out = image->scale_and_convert_to_rgb (image_size, film->scaler(), true);
-
- shared_ptr<Subtitle> sub;
- if (_timed_subtitle && _timed_subtitle->displayed_at (t)) {
- sub = _timed_subtitle->subtitle ();
+ for (list<ContentVideo>::const_iterator i = _decoded_video.begin(); i != _decoded_video.end(); ++i) {
+ if (i->frame == frame) {
+ return *i;
+ }
}
- if (sub) {
- dcpomatic::Rect const tx = subtitle_transformed_area (
- float (image_size.width) / video_size().width,
- float (image_size.height) / video_size().height,
- sub->area(), film->subtitle_offset(), film->subtitle_scale()
- );
+ return optional<ContentVideo> ();
+}
- shared_ptr<Image> im = sub->image()->scale (tx.size(), film->scaler(), true);
- out->alpha_blend (im, tx.position());
+optional<ContentVideo>
+VideoDecoder::get_video (VideoFrame frame, bool accurate)
+{
+ if (_decoded_video.empty() || (frame < _decoded_video.front().frame || frame > (_decoded_video.back().frame + 1))) {
+ /* Either we have no decoded data, or what we do have is a long way from what we want: seek */
+ seek (ContentTime::from_frames (frame, _video_content->video_frame_rate()), accurate);
}
- if (image_size != container_size) {
- assert (image_size.width <= container_size.width);
- assert (image_size.height <= container_size.height);
- shared_ptr<Image> im (new SimpleImage (PIX_FMT_RGB24, container_size, true));
- im->make_black ();
- im->copy (out, Position ((container_size.width - image_size.width) / 2, (container_size.height - image_size.height) / 2));
- out = im;
- }
-
- Video (out, same, t);
+ optional<ContentVideo> dec;
- if (_frame_rate_conversion.repeat) {
- Video (image, true, t + film->video_frames_to_time (1));
- _next_video = t + film->video_frames_to_time (2);
+ /* Now enough pass() calls will either:
+ * (a) give us what we want, or
+ * (b) hit the end of the decoder.
+ */
+ if (accurate) {
+ /* We are being accurate, so we want the right frame */
+ while (!decoded_video (frame) && !pass ()) {}
+ dec = decoded_video (frame);
} else {
- _next_video = t + film->video_frames_to_time (1);
+ /* Any frame will do: use the first one that comes out of pass() */
+ while (_decoded_video.empty() && !pass ()) {}
+ if (!_decoded_video.empty ()) {
+ dec = _decoded_video.front ();
+ }
}
- _odd = !_odd;
-}
-
-/** Called by subclasses when a subtitle is ready.
- * s may be 0 to say that there is no current subtitle.
- * @param s New current subtitle, or 0.
- */
-void
-VideoDecoder::subtitle (shared_ptr<TimedSubtitle> s)
-{
- _timed_subtitle = s;
-
- if (_timed_subtitle) {
- Position const p = _timed_subtitle->subtitle()->position ();
- _timed_subtitle->subtitle()->set_position (Position (p.x - _video_content->crop().left, p.y - _video_content->crop().top));
+ /* Clean up decoded_video */
+ while (!_decoded_video.empty() && _decoded_video.front().frame < (frame - 1)) {
+ _decoded_video.pop_front ();
}
-}
-bool
-VideoDecoder::video_done () const
-{
- shared_ptr<const Film> film = _film.lock ();
- assert (film);
-
- return (_video_content->length() - _next_video) < film->video_frames_to_time (1);
+ return dec;
}
-void
-VideoDecoder::seek (Time t)
-{
- _next_video = t;
-}
+/** Called by subclasses when they have a video frame ready */
void
-VideoDecoder::seek_back ()
+VideoDecoder::video (shared_ptr<const Image> image, VideoFrame frame)
{
- shared_ptr<const Film> film = _film.lock ();
- assert (film);
- _next_video -= film->video_frames_to_time (1);
+ /* Fill in gaps */
+ /* XXX: 3D */
+ while (!_decoded_video.empty () && (_decoded_video.back().frame + 1) < frame) {
+ _decoded_video.push_back (
+ ContentVideo (
+ _decoded_video.back().image,
+ _decoded_video.back().eyes,
+ _decoded_video.back().frame + 1
+ )
+ );
+ }
+
+ switch (_video_content->video_frame_type ()) {
+ case VIDEO_FRAME_TYPE_2D:
+ _decoded_video.push_back (ContentVideo (image, EYES_BOTH, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_ALTERNATE:
+ _decoded_video.push_back (ContentVideo (image, (frame % 2) ? EYES_RIGHT : EYES_LEFT, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
+ {
+ int const half = image->size().width / 2;
+ _decoded_video.push_back (ContentVideo (image->crop (Crop (0, half, 0, 0), true), EYES_LEFT, frame));
+ _decoded_video.push_back (ContentVideo (image->crop (Crop (half, 0, 0, 0), true), EYES_RIGHT, frame));
+ break;
+ }
+ case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
+ {
+ int const half = image->size().height / 2;
+ _decoded_video.push_back (ContentVideo (image->crop (Crop (0, 0, 0, half), true), EYES_LEFT, frame));
+ _decoded_video.push_back (ContentVideo (image->crop (Crop (0, 0, half, 0), true), EYES_RIGHT, frame));
+ break;
+ }
+ case VIDEO_FRAME_TYPE_3D_LEFT:
+ _decoded_video.push_back (ContentVideo (image, EYES_LEFT, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_RIGHT:
+ _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, frame));
+ break;
+ default:
+ assert (false);
+ }
}
void
-VideoDecoder::seek_forward ()
+VideoDecoder::seek (ContentTime, bool)
{
- shared_ptr<const Film> film = _film.lock ();
- assert (film);
- _next_video += film->video_frames_to_time (1);
+ _decoded_video.clear ();
}
-
projects / dcpomatic.git / blobdiff