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Open Source Computer Vision Library
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68 lines
2.3 KiB
68 lines
2.3 KiB
// Copyright 2012 Google Inc. All Rights Reserved. |
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// |
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// This code is licensed under the same terms as WebM: |
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// Software License Agreement: http://www.webmproject.org/license/software/ |
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// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
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// ----------------------------------------------------------------------------- |
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// |
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// Lossless encoder: internal header. |
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// |
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// Author: Vikas Arora (vikaas.arora@gmail.com) |
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#ifndef WEBP_ENC_VP8LI_H_ |
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#define WEBP_ENC_VP8LI_H_ |
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#include "./histogram.h" |
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#include "../utils/bit_writer.h" |
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#include "../webp/encode.h" |
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#include "../webp/format_constants.h" |
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#if defined(__cplusplus) || defined(c_plusplus) |
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extern "C" { |
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#endif |
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typedef struct { |
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const WebPConfig* config_; // user configuration and parameters |
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const WebPPicture* pic_; // input picture. |
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uint32_t* argb_; // Transformed argb image data. |
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uint32_t* argb_scratch_; // Scratch memory for argb rows |
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// (used for prediction). |
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uint32_t* transform_data_; // Scratch memory for transform data. |
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int current_width_; // Corresponds to packed image width. |
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// Encoding parameters derived from quality parameter. |
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int histo_bits_; |
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int transform_bits_; |
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int cache_bits_; // If equal to 0, don't use color cache. |
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// Encoding parameters derived from image characteristics. |
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int use_cross_color_; |
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int use_subtract_green_; |
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int use_predict_; |
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int use_palette_; |
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int palette_size_; |
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uint32_t palette_[MAX_PALETTE_SIZE]; |
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} VP8LEncoder; |
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//------------------------------------------------------------------------------ |
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// internal functions. Not public. |
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// Encodes the picture. |
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// Returns 0 if config or picture is NULL or picture doesn't have valid argb |
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// input. |
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int VP8LEncodeImage(const WebPConfig* const config, |
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const WebPPicture* const picture); |
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// Encodes the main image stream using the supplied bit writer. |
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WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, |
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const WebPPicture* const picture, |
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VP8LBitWriter* const bw); |
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//------------------------------------------------------------------------------ |
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#if defined(__cplusplus) || defined(c_plusplus) |
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} // extern "C" |
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#endif |
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#endif /* WEBP_ENC_VP8LI_H_ */
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