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Diffstat (limited to 'media/libwebp/utils/quant_levels_utils.h')
| -rw-r--r-- | media/libwebp/utils/quant_levels_utils.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/media/libwebp/utils/quant_levels_utils.h b/media/libwebp/utils/quant_levels_utils.h new file mode 100644 index 000000000..1cb5a32ca --- /dev/null +++ b/media/libwebp/utils/quant_levels_utils.h @@ -0,0 +1,36 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. +// ----------------------------------------------------------------------------- +// +// Alpha plane quantization utility +// +// Author: Vikas Arora (vikasa@google.com) + +#ifndef WEBP_UTILS_QUANT_LEVELS_H_ +#define WEBP_UTILS_QUANT_LEVELS_H_ + +#include <stdlib.h> + +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +// Replace the input 'data' of size 'width'x'height' with 'num-levels' +// quantized values. If not NULL, 'sse' will contain the sum of squared error. +// Valid range for 'num_levels' is [2, 256]. +// Returns false in case of error (data is NULL, or parameters are invalid). +int QuantizeLevels(uint8_t* const data, int width, int height, int num_levels, + uint64_t* const sse); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_UTILS_QUANT_LEVELS_H_ */ |