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| 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_ */ |
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