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