1 // Copyright 2012 Google Inc. All Rights Reserved. 2 // 3 // This code is licensed under the same terms as WebM: 4 // Software License Agreement: http://www.webmproject.org/license/software/ 5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ 6 // ----------------------------------------------------------------------------- 7 // 8 // Lossless encoder: internal header. 9 // 10 // Author: Vikas Arora (vikaas.arora@gmail.com) 11 12 #ifndef WEBP_ENC_VP8LI_H_ 13 #define WEBP_ENC_VP8LI_H_ 14 15 #include "./histogram.h" 16 #include "../utils/bit_writer.h" 17 #include "webp/encode.h" 18 #include "webp/format_constants.h" 19 20 #if defined(__cplusplus) || defined(c_plusplus) 21 extern "C" { 22 #endif 23 24 typedef struct { 25 const WebPConfig* config_; // user configuration and parameters 26 const WebPPicture* pic_; // input picture. 27 28 uint32_t* argb_; // Transformed argb image data. 29 uint32_t* argb_scratch_; // Scratch memory for argb rows 30 // (used for prediction). 31 uint32_t* transform_data_; // Scratch memory for transform data. 32 int current_width_; // Corresponds to packed image width. 33 34 // Encoding parameters derived from quality parameter. 35 int histo_bits_; 36 int transform_bits_; 37 int cache_bits_; // If equal to 0, don't use color cache. 38 39 // Encoding parameters derived from image characteristics. 40 int use_cross_color_; 41 int use_subtract_green_; 42 int use_predict_; 43 int use_palette_; 44 int palette_size_; 45 uint32_t palette_[MAX_PALETTE_SIZE]; 46 } VP8LEncoder; 47 48 //------------------------------------------------------------------------------ 49 // internal functions. Not public. 50 51 // Encodes the picture. 52 // Returns 0 if config or picture is NULL or picture doesn't have valid argb 53 // input. 54 int VP8LEncodeImage(const WebPConfig* const config, 55 const WebPPicture* const picture); 56 57 // Encodes the main image stream using the supplied bit writer. 58 WebPEncodingError VP8LEncodeStream(const WebPConfig* const config, 59 const WebPPicture* const picture, 60 VP8LBitWriter* const bw); 61 62 //------------------------------------------------------------------------------ 63 64 #if defined(__cplusplus) || defined(c_plusplus) 65 } // extern "C" 66 #endif 67 68 #endif /* WEBP_ENC_VP8LI_H_ */ 69