Go to the source code of this file.
Functions | |
| int32_t | CompandedValue (int32_t value) |
| Apply the default companding curve to the specified value. More... | |
| uint32_t | CompandingParameter () |
| Return the parameter that controls the companding curve. More... | |
| CODEC_ERROR | ComputeCubicTable (int16_t cubic_table[], int cubic_table_length, int16_t maximum_value) |
| Compute a table of values for the cubic companding curve. More... | |
| int32_t | UncompandedValue (int32_t value) |
| Invert the companding curve applied during encoding. More... | |
| PIXEL | UncompandedPixel (PIXEL value) |
| Invert the companding curve applied to a pixel. | |
| CODEC_ERROR | InvertCompanding (PIXEL *image, DIMENSION width, DIMENSION height, DIMENSION pitch) |
| Invert the companding curve applied during encoding. | |
Detailed Description
Declaration of the routines for computing the companding curves that is applied to the quantized coefficient magnitudes.
(c) 2013 Society of Motion Picture & Television Engineers LLC and Woodman Labs, Inc. All rights reserved–use subject to compliance with end user license agreement.
Function Documentation
◆ CompandedValue()
| int32_t CompandedValue | ( | int32_t | value | ) |
Apply the default companding curve to the specified value.
Note that this companding curve has been superceeded by the cubic curve.
◆ CompandingParameter()
| uint32_t CompandingParameter | ( | ) |
Return the parameter that controls the companding curve.
This parameter does not apply if the cubic companding curve is used.
◆ ComputeCubicTable()
| CODEC_ERROR ComputeCubicTable | ( | int16_t | cubic_table[], |
| int | cubic_table_length, | ||
| int16_t | maximum_value | ||
| ) |
Compute a table of values for the cubic companding curve.
The companding curve is f(x) = x + (x ^ 3 / (255 ^ 3)) * 768 so the range of coefficient magnitudes from 0 to 255 becomess 0 to 1023.
◆ UncompandedValue()
| int32_t UncompandedValue | ( | int32_t | value | ) |
Invert the companding curve applied during encoding.
Invert the companding curve applied during encoding.
This routine is used for debugging and only applies if the default companding curve is used.
