sensor_format_video_cbycry

Format for a YCbCr 4:2:2 packed frame type

Synopsis:

#include <sensor/sensor_api.h>

typedef struct sensor_format_video_cbycry_t {
    uint64_t bufsize;
    uint32_t height;
    uint32_t width;
    uint32_t stride;
    uint32_t packing;
    uint32_t bpp;
    bool le;
} sensor_format_video_cbycry_t;

Data:

uint64_t bufsize: The size of the buffer as a 64-bit integer.
uint32_t height: The height of the image, in pixels.
uint32_t width: The width of the image, in pixels.
uint32_t stride: The number of bytes between the first pixel of the first row in memory and the first pixel of the second row in memory.
Stride is often called pitch.
uint32_t packing: The inter-pixel distance, in bits.
uint32_t bpp: The number of bits used to encode a pixel value.
bool le: The endian order used for packing the data.
A value of true indicates that the bytes are packed in little-endian order; a value of false indicates that the bytes are packed in big-endian order.

Library:

libsensor

Description:

Use this format when SENSOR_FORMAT_VIDEO_CBYCRY is reported as the sensor_format_t.

Each set of 2 pixel values in the CbYCrY frame is part of a macro-pixel. A macro-pixel is thus made up of four components in the following order: a Cb (blue-difference chroma) component and Y (luma) component (which comprise the first pixel value), and a Cr (red-difference chroma) component and Y (luma) component (which comprise the second pixel value). Each macro-pixel is stored contiguously on the same line.

Each pixel contains a number of bits indicated by bpp and is stored in the packing field. The endian order le indicates if the bit packing was done in little-endian or big-endian order.

For example, le = true, bpp = 16, and packing = 16 describes a macro-pixel stored as follows:

 Bit:        0 1 2 3 4 5 6 7  01234567 0 1 2 3 4 5 6 7  01234567
 Scanline n: CbCbCbCbCbCbCbCb YYYYYYYY CrCrCrCrCrCrCrCr YYYYYYYY = 32 bits