It builds.

[dcpomatic.git] / src / lib / video_decoder.cc

diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc
index 144a494dcd48fc5a6cd9916d4d9a7d40c90fd2e5..f3d3a31041583b6a7b0fba7a115b7e29f8d45d7b 100644 (file)
--- a/src/lib/video_decoder.cc
+++ b/src/lib/video_decoder.cc
@@ -1,5 +1,5 @@
 /*
-    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
@@ -19,10 +19,12 @@
 
 #include "video_decoder.h"
 #include "image.h"
+#include "content_video.h"
 
 #include "i18n.h"
 
 using std::cout;
+using std::list;
 using boost::shared_ptr;
 using boost::optional;
 
@@ -32,32 +34,86 @@ VideoDecoder::VideoDecoder (shared_ptr<const VideoContent> c)
 
 }
 
+shared_ptr<ContentVideo>
+VideoDecoder::decoded_video (VideoFrame frame)
+{
+       for (list<shared_ptr<ContentVideo> >::const_iterator i = _decoded_video.begin(); i != _decoded_video.end(); ++i) {
+               if ((*i)->frame == frame) {
+                       return *i;
+               }
+       }
+
+       return shared_ptr<ContentVideo> ();
+}
+
+shared_ptr<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);
+       }
+
+       shared_ptr<ContentVideo> dec;
+
+       /* 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 {
+               /* 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 ();
+               }
+       }
+
+       /* Clean up decoded_video */
+       while (!_decoded_video.empty() && _decoded_video.front()->frame < (frame - 1)) {
+               _decoded_video.pop_front ();
+       }
+
+       return dec;
+}
+
+
 /** Called by subclasses when they have a video frame ready */
 void
-VideoDecoder::video (shared_ptr<const Image> image, bool same, ContentTime time)
+VideoDecoder::video (shared_ptr<const Image> image, VideoFrame frame)
 {
        switch (_video_content->video_frame_type ()) {
        case VIDEO_FRAME_TYPE_2D:
-               _pending.push_back (shared_ptr<DecodedVideo> (new DecodedVideo (time, image, EYES_BOTH, same)));
+               _decoded_video.push_back (shared_ptr<ContentVideo> (new ContentVideo (image, EYES_BOTH, frame)));
                break;
        case VIDEO_FRAME_TYPE_3D_ALTERNATE:
-               Video (image, (frame % 2) ? EYES_RIGHT : EYES_LEFT, same);
+               _decoded_video.push_back (shared_ptr<ContentVideo> (new ContentVideo (image, (frame % 2) ? EYES_RIGHT : EYES_LEFT, frame)));
                break;
        case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
        {
                int const half = image->size().width / 2;
-               _pending.push_back (shared_ptr<DecodedVideo> (new DecodedVideo (time, image->crop (Crop (0, half, 0, 0), true), EYES_LEFT, same)));
-               _pending.push_back (shared_ptr<DecodedVideo> (new DecodedVideo (time, image->crop (Crop (half, 0, 0, 0), true), EYES_RIGHT, same)));
+               _decoded_video.push_back (shared_ptr<ContentVideo> (new ContentVideo (image->crop (Crop (0, half, 0, 0), true), EYES_LEFT, frame)));
+               _decoded_video.push_back (shared_ptr<ContentVideo> (new 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;
-               _pending.push_back (shared_ptr<DecodedVideo> (new DecodedVideo (time, image->crop (Crop (0, 0, 0, half), true), EYES_LEFT, same)));
-               _pending.push_back (shared_ptr<DecodedVideo> (new DecodedVideo (time, image->crop (Crop (0, 0, half, 0), true), EYES_RIGHT, same)));
+               _decoded_video.push_back (shared_ptr<ContentVideo> (new ContentVideo (image->crop (Crop (0, 0, 0, half), true), EYES_LEFT, frame)));
+               _decoded_video.push_back (shared_ptr<ContentVideo> (new ContentVideo (image->crop (Crop (0, 0, half, 0), true), EYES_RIGHT, frame)));
                break;
        }
        default:
                assert (false);
        }
 }
+
+void
+VideoDecoder::seek (ContentTime, bool)
+{
+       _decoded_video.clear ();
+}
+