PeerStreamer

#include "libavutil/pixdesc.h"

 * Compute the max pixel step for each plane of an image with a

 * format described by pixdesc

 *

 * The pixel step is the distance in bytes between the first byte of

 * the group of bytes which describe a pixel component and the first

 * byte of the successive group in the same plane for the same

 * component.

 *

 * @param max_pixstep an array which is filled with the max pixel step

 * for each plane. Since a plane may contain different pixel

 * components, the computed max_pixstep[plane] is relative to the

 * component in the plane with the max pixel step.

 * @param max_pixstep_comp an array which is filled with the component

 * for each plane which has the max pixel step. May be NULL.

 */

static inline void av_fill_image_max_pixstep(int max_pixstep[4], int max_pixstep_comp[4],

                                             const AVPixFmtDescriptor *pixdesc)

{

    int i;

    memset(max_pixstep, 0, 4*sizeof(max_pixstep[0]));

    if (max_pixstep_comp)

        memset(max_pixstep_comp, 0, 4*sizeof(max_pixstep_comp[0]));

    for (i = 0; i < 4; i++) {

        const AVComponentDescriptor *comp = &(pixdesc->comp[i]);

        if ((comp->step_minus1+1) > max_pixstep[comp->plane]) {

            max_pixstep[comp->plane] = comp->step_minus1+1;

            if (max_pixstep_comp)

                max_pixstep_comp[comp->plane] = i;

        }

    }

}

/**