1 // Copyright 2013 Google Inc. All Rights Reserved. 2 // 3 // Use of this source code is governed by a BSD-style license 4 // that can be found in the COPYING file in the root of the source 5 // tree. An additional intellectual property rights grant can be found 6 // in the file PATENTS. All contributing project authors may 7 // be found in the AUTHORS file in the root of the source tree. 8 // ----------------------------------------------------------------------------- 9 // 10 // Alpha plane de-quantization utility 11 // 12 // Author: Vikas Arora (vikasa@google.com) 13 14 #ifndef WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_ 15 #define WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_ 16 17 #include "src/webp/types.h" 18 19 #ifdef __cplusplus 20 extern "C" { 21 #endif 22 23 // Apply post-processing to input 'data' of size 'width'x'height' assuming that 24 // the source was quantized to a reduced number of levels. 'stride' is in bytes. 25 // Strength is in [0..100] and controls the amount of dithering applied. 26 // Returns false in case of error (data is NULL, invalid parameters, 27 // malloc failure, ...). 28 int WebPDequantizeLevels(uint8_t* const data, int width, int height, int stride, 29 int strength); 30 31 #ifdef __cplusplus 32 } // extern "C" 33 #endif 34 35 #endif // WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_ 36