On Tue, Dec 6, 2016 at 10:46 AM, Vittorio Giovara
<vittorio.giov...@gmail.com> wrote:
> While no decoder currently exports spherical information, this type
> represents a frame property that has to be passed through from container
> to frames.
>
> Signed-off-by: Vittorio Giovara <vittorio.giov...@gmail.com>
> ---
> + /**
> + * @name Initial orientation
> + * @{
> + * There fields describe additional rotations applied to the sphere after
> + * the video frame is mapped onto it. The sphere is rotated around the
> + * viewer, who remains stationary. The order of transformation is always
> + * yaw, followed by pitch, and finally by roll.
> + *
> + * The coordinate system matches the one defined in OpenGL, where the
> + * forward vector (z) is coming out of screen, and it is equivalent to
> + * a rotation matrix of R = r_y(yaw) * r_x(pitch) * r_z(roll).
> + *
> + * A positive yaw points the viewer towards the left.
> + * A positive pitch points the viewer downwards.
> + * A positive roll tilts the viewer to the right.
One more iteration of this description, hopefully final:
* A positive yaw rotates the portion of the sphere in front of the viewer
* toward their right. A positive pitch rotates the portion of the sphere
* in front of the viewer upwards. A positive roll tilts the portion of
* the sphere in front of the viewer to the viewer's right.
Unless objections I'll push the set in the next few days.
Please CC.
--
Vittorio
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
