-/* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
-
/*
- 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 "log.h"
-#include "job.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)
+VideoDecoder::VideoDecoder (shared_ptr<const VideoContent> c)
+#ifdef DCPOMATIC_DEBUG
+ : test_gaps (0)
, _video_content (c)
- , _video_frame (0)
- , _last_content_time (0)
+#else
+ : _video_content (c)
+#endif
{
}
-/** Called by subclasses to tell the world that some video data is ready.
- * We find a subtitle then emit it for listeners.
- * @param image frame to emit.
- * @param t Time of the frame within the source.
+list<ContentVideo>
+VideoDecoder::decoded_video (VideoFrame frame)
+{
+ list<ContentVideo> output;
+
+ for (list<ContentVideo>::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.
*/
-void
-VideoDecoder::emit_video (shared_ptr<Image> image, bool same, Time t)
+list<ContentVideo>
+VideoDecoder::get_video (VideoFrame frame, bool accurate)
{
- shared_ptr<Subtitle> sub;
- if (_timed_subtitle && _timed_subtitle->displayed_at (t)) {
- sub = _timed_subtitle->subtitle ();
+ 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);
}
- TIMING (N_("Decoder emits %1"), _video_frame);
- Video (image, same, sub, t);
- ++_video_frame;
+ list<ContentVideo> dec;
+
+ /* Now enough pass() calls should 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.
+ * 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 ());
+ }
+ }
- _last_content_time = t;
+ /* Clean up decoded_video */
+ while (!_decoded_video.empty() && _decoded_video.front().frame < (frame - 1)) {
+ _decoded_video.pop_front ();
+ }
+
+ return dec;
}
-/** Set up the current subtitle. This will be put onto frames that
- * fit within its time specification. s may be 0 to say that there
- * is no current subtitle.
- * @param s New current subtitle, or 0.
- */
+
+/** Called by subclasses when they have a video frame ready */
void
-VideoDecoder::emit_subtitle (shared_ptr<TimedSubtitle> s)
+VideoDecoder::video (shared_ptr<const ImageProxy> image, VideoFrame frame)
{
- _timed_subtitle = s;
+ /* We should not receive the same thing twice */
+ assert (_decoded_video.empty() || frame != _decoded_video.back().frame);
+
+ /* Fill in gaps */
+ /* XXX: 3D */
+
+ while (!_decoded_video.empty () && (_decoded_video.back().frame + 1) < frame) {
+#ifdef DCPOMATIC_DEBUG
+ test_gaps++;
+#endif
+ _decoded_video.push_back (
+ ContentVideo (
+ _decoded_video.back().image,
+ _decoded_video.back().eyes,
+ _decoded_video.back().part,
+ _decoded_video.back().frame + 1
+ )
+ );
+ }
- 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));
+ switch (_video_content->video_frame_type ()) {
+ case VIDEO_FRAME_TYPE_2D:
+ _decoded_video.push_back (ContentVideo (image, EYES_BOTH, PART_WHOLE, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_ALTERNATE:
+ _decoded_video.push_back (ContentVideo (image, (frame % 2) ? EYES_RIGHT : EYES_LEFT, PART_WHOLE, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
+ _decoded_video.push_back (ContentVideo (image, EYES_LEFT, PART_LEFT_HALF, frame));
+ _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, PART_RIGHT_HALF, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
+ _decoded_video.push_back (ContentVideo (image, EYES_LEFT, PART_TOP_HALF, frame));
+ _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, PART_BOTTOM_HALF, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_LEFT:
+ _decoded_video.push_back (ContentVideo (image, EYES_LEFT, PART_WHOLE, frame));
+ break;
+ case VIDEO_FRAME_TYPE_3D_RIGHT:
+ _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, PART_WHOLE, frame));
+ break;
+ default:
+ assert (false);
}
}
void
-VideoDecoder::set_progress (Job* j) const
+VideoDecoder::seek (ContentTime, bool)
{
- assert (j);
-
- if (_film->length()) {
- j->set_progress (float (_video_frame) / _film->time_to_video_frames (_film->length()));
- }
+ _decoded_video.clear ();
}
+
projects / dcpomatic.git / blobdiff