mlib_VideoColorYUV2ABGR420_WX2

- YUV to RGB color conversion

Synopsis

cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_VideoColorYUV2ABGR420_WX2(mlib_u8 *abgr, const mlib_u8 *y,
     const mlib_u8 *u, const mlib_u8 *v, mlib_s32 width, mlib_s32 height,
     mlib_s32 abgr_stride, mlib_s32 y_stride, mlib_s32 uv_stride,
     mlib_s32 left, mlib_s32 top, mlib_s32 right, 
     mlib_s32 bottom);

Description

The mlib_VideoColorYUV2ABGR420_WX2() function performs YUV to RGB color conversion used in MPEG1 and MPEG2 video compression in the 4:2:0 sequence. It performs color conversion together with window clipping and 2X zooming.

The luminance component is stored in Y, the chrominance components are stored in U and V, respectively. The size of the chrominance image depends on the chroma format used by the sequence. In this sequence, the chrominance components are subsampled 2-to-1 in both the horizontal and vertical directions in respect to the luminance component.

Parameters

The function takes the following arguments:

abgr

Pointer to the destination packed ABGR image. abgr must be 8-byte aligned.

y

Pointer to the source Y component. y must be 8-byte aligned.

u

Pointer to the source U component. u must be 4-byte aligned.

v

Pointer to the source V component. v must be 4-byte aligned.

width

Width of the image. width must be a multiple of 8.

height

Height of the image. height must be a multiple of 2.

abgr_stride

Stride, in bytes, between adjacent rows in the ABGR image. abgr_stride must be a multiple of 8.

y_stride

Stride, in bytes, between adjacent rows in the Y component image. y_stride must be a multiple of 8.

uv_stride

Stride, in bytes, between adjacent rows in the U and V component images. uv_stride must be a multiple of 8.

left

Left border of clipping window. 0 ≤ left < right ≤ width.

top

Top border of clipping window. 0 ≤ top < bottom ≤ height.

right

Left border of clipping window. 0 ≤ left < right ≤ width.

bottom

Bottom border of clipping window. 0 ≤ top < bottom ≤ height.

Return Values

The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

Attributes

See attributes(5) for descriptions of the following attributes:

See Also

mlib_VideoColorYUV2ABGR420_W(3MLIB), mlib_VideoColorYUV2ABGR420_WX3(3MLIB), mlib_VideoColorYUV2ABGR420_X2(3MLIB), mlib_VideoColorYUV2ABGR420_X3(3MLIB), attributes(5)