On Fri, Nov 11, 2016 at 05:49:00PM -0500, Vittorio Giovara wrote:
[...]
> +/**
> + * This structure describes how to handle spherical videos, outlining
> + * information about projection, initial layout, and any other view modifier.
> + *
> + * @note The struct must be allocated with av_spherical_alloc() and
> + * its size is not a part of the public ABI.
> + */
> +typedef struct AVSphericalMapping {
> + /**
> + * Projection type.
> + */
> + enum AVSphericalProjection projection;
> +
> + /**
> + * @name Initial orientation
> + * @{
> + * These fields represent the pose values that measure the rotation
> + * transformation (in degrees) to be applied to the projection.
> + * See this equirectangular projection as example:
> + *
> + * @code{.unparsed}
> + * Yaw
> + * -180 0 180
> + * 90 +-------------+-------------+ 180
> + * | | |
> + * P | | o> |
> + * i | ^ |
> + * t 0 +-------------X-------------+ 0 Roll
> + * c | | |
> + * h | | |
> + * | | |
> + * -90 +-------------+-------------+ -180
> + *
> + * X - the default camera center
> + * ^ - the default up vector
> + * > - the up vector for a rotation of 90 degrees
> + * o - the image center for yaw = 90, pitch = 45, roll = 0
> + * @endcode
> + *
> + * The order of transformation is always yaw, followed by pitch, and
> + * finally by roll.
> + */> + double yaw; ///< Clockwise rotation around the up vector [-180, 180]. > + double pitch; ///< Counter-clockwise rotation around the right vector > [-90, 90]. > + double roll; ///< Counter-clockwise rotation around the forward vector > [-180, 180]. please use intXY (64 or 32 as preferred) so there are no platform rounding dependancies [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The misfortune of the wise is better than the prosperity of the fool. -- Epicurus
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