Enum NVCVPacking

Defined in File DataLayout.h

Enum Documentation

enum NVCVPacking

Defines how channels are packed into an image plane element.

Packing encodes how many channels the plane element has, and how they are arranged in memory.

Up to 4 channels (denoted by X, Y, Z, W) can be packed into an image plane element, each one occupying a specified number of bits.

When two channels are specified one right after the other, they are ordered from most-significant bit to least-significant bit. Words are separated by underscores. For example:

X8Y8Z8W8 = a single 32-bit word containing 4 channels, 8 bits each.

In little-endian architectures:

In big-endian architectures:

X8_Y8_Z8_W8 = four consecutive 8-bit words, corresponding to 4 channels, 8 bits each.

In little-endian architectures:

In big-endian architectures:

In cases where a word is less than 8 bits (e.g., X1 1-bit channel), channels are ordered from LSB to MSB within a word.

Some formats allow different packings when pixels’ horizontal coordinate is even or odd. For instance, every pixel of YUV422 packed format contains an Y channel, while only even pixels contain the U channel, and odd pixels contain V channel. Such formats use a double-underscore to separate the even pixels from the odd pixels. The packing just described might be referred to X8_Y8__X8_Z8, where X = luma, Y = U chroma, Z = V chroma.

Note

Also note equivalences such as the following:

Note

In little-endian: X8_Y8_Z8_W8 = W8Z8Y8X8.

Note

In big-endian: X8_Y8_Z8_W8 = X8Y8Z8W8.

Values:

enumerator NVCV_PACKING_0: No channels.

enumerator NVCV_PACKING_X1: One 1-bit channel.

enumerator NVCV_PACKING_X2: One 2-bit channel.

enumerator NVCV_PACKING_X4: One 4-bit channel.

enumerator NVCV_PACKING_X8: One 8-bit channel.

enumerator NVCV_PACKING_b4X4: One LSB 4-bit channel in a 8-bit word

enumerator NVCV_PACKING_X4b4: One MSB 4-bit channel in a 8-bit word

enumerator NVCV_PACKING_X4Y4: Two 4-bit channels in one 8-bit word.

enumerator NVCV_PACKING_X3Y3Z2: Three 3-, 3- and 2-bit channels in one 8-bit word.

enumerator NVCV_PACKING_X16: One 16-bit channel.

enumerator NVCV_PACKING_b6X10: One LSB 10-bit channel in one 16-bit word.

enumerator NVCV_PACKING_X10b6: One MSB 10-bit channel in one 16-bit word.

enumerator NVCV_PACKING_b4X12: One LSB 12-bit channel in one 16-bit word.

enumerator NVCV_PACKING_X12b4: One MSB 12-bit channel in one 16-bit word.

enumerator NVCV_PACKING_b2X14: One LSB 14-bit channel in one 16-bit word.

enumerator NVCV_PACKING_X14b2: One MSB 14-bit channel in one 16-bit word.

enumerator NVCV_PACKING_X8_Y8: Two 8-bit channels in two 8-bit words.

enumerator NVCV_PACKING_X5Y5Z6: Three 5-, 5- and 6-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X5Y6Z5: Three 5-, 6- and 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X6Y5Z5: Three 6-, 5- and 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_b4X4Y4Z4: Three 4-bit channels in one 16-bit word.

enumerator NVCV_PACKING_b1X5Y5Z5: Three 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X5Y5b1Z5: Three 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X1Y5Z5W5: Four 1-, 5-, 5- and 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X4Y4Z4W4: Four 4-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X5Y1Z5W5: Four 5-, 1-, 5- and 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X5Y5Z1W5: Four 5-, 5-, 1- and 5-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X5Y5Z5W1: Four 5-, 5-, 5- and 1-bit channels in one 16-bit word.

enumerator NVCV_PACKING_X8_Y8__X8_Z8: 2 pixels of 2 8-bit channels each, totalling 4 8-bit words.

enumerator NVCV_PACKING_Y8_X8__Z8_X8: 2 pixels of 2 swapped 8-bit channels each, totalling 4 8-bit words.

enumerator NVCV_PACKING_X24: One 24-bit channel.

enumerator NVCV_PACKING_X8_Y8_Z8: Three 8-bit channels in three 8-bit words.

enumerator NVCV_PACKING_X32: One 32-bit channel.

enumerator NVCV_PACKING_b12X20: One LSB 20-bit channel in one 32-bit word.

enumerator NVCV_PACKING_X20b12: One MSB 20-bit channel in one 32-bit word.

enumerator NVCV_PACKING_X24b8: One MSB 24-bit channel in one 32-bit word.

enumerator NVCV_PACKING_b8X24: One LSB 24-bit channel in one 32-bit word.

enumerator NVCV_PACKING_X16_Y16: Two 16-bit channels in two 16-bit words.

enumerator NVCV_PACKING_X10b6_Y10b6: Two MSB 10-bit channels in two 16-bit words.

enumerator NVCV_PACKING_X12b4_Y12b4: Two MSB 12-bit channels in two 16-bit words.

enumerator NVCV_PACKING_X10Y11Z11: Three 10-, 11- and 11-bit channels in one 32-bit word.

enumerator NVCV_PACKING_X11Y11Z10: Three 11-, 11- and 10-bit channels in one 32-bit word.

enumerator NVCV_PACKING_b2X10Y10Z10: Three LSB 10-bit channels in one 32-bit word.

enumerator NVCV_PACKING_X10Y10Z10b2: Three MSB 10-bit channels in one 32-bit word.

enumerator NVCV_PACKING_X8_Y8_Z8_W8: Four 8-bit channels in one 32-bit word.

enumerator NVCV_PACKING_X2Y10Z10W10: Four 2-, 10-, 10- and 10-bit channels in one 32-bit word.

enumerator NVCV_PACKING_X10Y10Z10W2: Four 10-, 10-, 10- and 2-bit channels in one 32-bit word.

enumerator NVCV_PACKING_X48: One 48-bit channel.

enumerator NVCV_PACKING_X16_Y16_Z16: Three 16-bit channels in three 16-bit words.

enumerator NVCV_PACKING_X64: One 64-bit channel.

enumerator NVCV_PACKING_X32_Y32: Two 32-bit channels in two 32-bit words.

enumerator NVCV_PACKING_X32_Y24b8: Two channels: 32-bit in a 32-bit word, 24-bit MSB in a 32-bit word

enumerator NVCV_PACKING_X16_Y16_Z16_W16: Four 16-bit channels in one 64-bit word.

enumerator NVCV_PACKING_X96: One 96-bit channel.

enumerator NVCV_PACKING_X32_Y32_Z32: Three 32-bit channels in three 32-bit words.

enumerator NVCV_PACKING_X128: One 128-bit channel.

enumerator NVCV_PACKING_X64_Y64: Two 64-bit channels in two 64-bit words.

enumerator NVCV_PACKING_X32_Y32_Z32_W32: Four 32-bit channels in three 32-bit words.

enumerator NVCV_PACKING_X192: One 192-bit channel.

enumerator NVCV_PACKING_X64_Y64_Z64: Three 64-bit channels in three 64-bit words.

enumerator NVCV_PACKING_X256: One 256-bit channel.

enumerator NVCV_PACKING_X128_Y128: Two 128-bit channels in two 128-bit words.

enumerator NVCV_PACKING_X64_Y64_Z64_W64: Four 64-bit channels in four 64-bit words.