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/*! @file companding.h
*
* @brief Declaration of the routines for computing the companding curves
* that is applied to the quantized coefficient magnitudes.
*
* @version 1.0.0
*
* (C) Copyright 2018 GoPro Inc (http://gopro.com/).
*
* Licensed under either:
* - Apache License, Version 2.0, http://www.apache.org/licenses/LICENSE-2.0
* - MIT license, http://opensource.org/licenses/MIT
* at your option.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef COMPANDING_H
#define COMPANDING_H
#ifdef __cplusplus
extern "C" {
#endif
int32_t CompandedValue(int32_t value);
uint32_t CompandingParameter(void);
CODEC_ERROR ComputeCubicTable(int16_t cubic_table[], int cubic_table_length, int16_t maximum_value);
// Invert the companding curve applied to a quantized coefficient magnitude (for debugging)
int32_t UncompandedValue(int32_t value);
PIXEL UncompandedPixel(PIXEL value);
CODEC_ERROR InvertCompanding(PIXEL *image, DIMENSION width, DIMENSION height, DIMENSION pitch);
#ifdef __cplusplus
}
#endif
#endif // COMPANDING_H
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