/*
- 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 "options.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<Film> f, shared_ptr<const DecodeOptions> o, Job* j)
- : Decoder (f, o, j)
- , _video_frame (0)
- , _last_source_time (0)
+VideoDecoder::VideoDecoder (shared_ptr<const VideoContent> c)
+#ifdef DCPOMATIC_DEBUG
+ : test_gaps (0)
+ , _video_content (c)
+#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, in seconds.
- */
-void
-VideoDecoder::emit_video (shared_ptr<Image> image, double t)
+optional<ContentVideo>
+VideoDecoder::decoded_video (VideoFrame frame)
{
- 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;
+ }
}
- signal_video (image, false, sub);
- _last_source_time = t;
+ return optional<ContentVideo> ();
}
-void
-VideoDecoder::repeat_last_video ()
+optional<ContentVideo>
+VideoDecoder::get_video (VideoFrame frame, bool accurate)
{
- if (!_last_image) {
- _last_image.reset (new SimpleImage (pixel_format(), native_size(), false));
- _last_image->make_black ();
+ 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);
}
- signal_video (_last_image, true, _last_subtitle);
-}
+ optional<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)) {
+ /* 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 = _decoded_video.front ();
+ }
+ }
-void
-VideoDecoder::signal_video (shared_ptr<Image> image, bool same, shared_ptr<Subtitle> sub)
-{
- TIMING ("Decoder emits %1", _video_frame);
- Video (image, same, sub);
- ++_video_frame;
+ /* Clean up decoded_video */
+ while (!_decoded_video.empty() && _decoded_video.front().frame < (frame - 1)) {
+ _decoded_video.pop_front ();
+ }
- _last_image = image;
- _last_subtitle = sub;
+ return dec;
}
+
+/** Called by subclasses when they have a video frame ready */
void
-VideoDecoder::emit_subtitle (shared_ptr<TimedSubtitle> s)
+VideoDecoder::video (shared_ptr<const Image> 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().frame + 1
+ )
+ );
+ }
- if (_timed_subtitle) {
- Position const p = _timed_subtitle->subtitle()->position ();
- _timed_subtitle->subtitle()->set_position (Position (p.x - _film->crop().left, p.y - _film->crop().top));
+ 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::set_subtitle_stream (shared_ptr<SubtitleStream> s)
+VideoDecoder::seek (ContentTime, bool)
{
- _subtitle_stream = s;
+ _decoded_video.clear ();
}
-void
-VideoDecoder::set_progress () const
-{
- if (_job && _film->length()) {
- _job->set_progress (float (_video_frame) / _film->length().get());
- }
-}