#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;
-VideoDecoder::VideoDecoder (shared_ptr<const Film> f, shared_ptr<const VideoContent> c)
- : Decoder (f)
- , _video_content (c)
- , _video_position (0)
+VideoDecoder::VideoDecoder (shared_ptr<const VideoContent> c)
+ : _video_content (c)
{
}
+optional<ContentVideo>
+VideoDecoder::decoded_video (VideoFrame frame)
+{
+ for (list<ContentVideo>::const_iterator i = _decoded_video.begin(); i != _decoded_video.end(); ++i) {
+ if (i->frame == frame) {
+ return *i;
+ }
+ }
+
+ return optional<ContentVideo> ();
+}
+
+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);
+ }
+
+ optional<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, VideoContent::Frame frame)
+VideoDecoder::video (shared_ptr<const Image> image, VideoFrame frame)
{
+ /* 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:
- Video (image, EYES_BOTH, same, frame);
+ _decoded_video.push_back (ContentVideo (image, EYES_BOTH, frame));
break;
case VIDEO_FRAME_TYPE_3D_ALTERNATE:
- Video (image, (frame % 2) ? EYES_RIGHT : EYES_LEFT, same, frame / 2);
+ _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;
- Video (image->crop (Crop (0, half, 0, 0), true), EYES_LEFT, same, frame);
- Video (image->crop (Crop (half, 0, 0, 0), true), EYES_RIGHT, same, frame);
+ _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;
- Video (image->crop (Crop (0, 0, 0, half), true), EYES_LEFT, same, frame);
- Video (image->crop (Crop (0, 0, half, 0), true), EYES_RIGHT, same, frame);
+ _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:
- Video (image, EYES_LEFT, same, frame);
+ _decoded_video.push_back (ContentVideo (image, EYES_LEFT, frame));
break;
case VIDEO_FRAME_TYPE_3D_RIGHT:
- Video (image, EYES_RIGHT, same, frame);
+ _decoded_video.push_back (ContentVideo (image, EYES_RIGHT, frame));
break;
+ default:
+ assert (false);
}
-
- _video_position = frame + 1;
+}
+
+void
+VideoDecoder::seek (ContentTime, bool)
+{
+ _decoded_video.clear ();
}