1793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Copyright 2011 Google Inc. All Rights Reserved. 2793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// 3793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Use of this source code is governed by a BSD-style license 4793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// that can be found in the COPYING file in the root of the source 5793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// tree. An additional intellectual property rights grant can be found 6793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// in the file PATENTS. All contributing project authors may 7793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// be found in the AUTHORS file in the root of the source tree. 8793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// ----------------------------------------------------------------------------- 9793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// 10793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// WebPPicture utils: colorspace conversion, crop, ... 11793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// 12793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Author: Skal (pascal.massimino@gmail.com) 13793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 14793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include <assert.h> 15793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include <stdlib.h> 16793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include <math.h> 17793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 18793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include "./vp8enci.h" 19793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include "../utils/rescaler.h" 20793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include "../utils/utils.h" 21793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include "../dsp/dsp.h" 22793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#include "../dsp/yuv.h" 23793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 24793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#if defined(__cplusplus) || defined(c_plusplus) 25793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerextern "C" { 26793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 27793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 28793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define HALVE(x) (((x) + 1) >> 1) 29793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define IS_YUV_CSP(csp, YUV_CSP) (((csp) & WEBP_CSP_UV_MASK) == (YUV_CSP)) 30793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 31793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic const union { 32793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint32_t argb; 33793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t bytes[4]; 34793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} test_endian = { 0xff000000u }; 35793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define ALPHA_IS_LAST (test_endian.bytes[3] == 0xff) 36793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 37793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 38793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// WebPPicture 39793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 40793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 41793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureAlloc(WebPPicture* picture) { 42793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture != NULL) { 43793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; 44793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int has_alpha = picture->colorspace & WEBP_CSP_ALPHA_BIT; 45793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int width = picture->width; 46793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int height = picture->height; 47793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 48793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!picture->use_argb) { 49793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int y_stride = width; 50793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int uv_width = HALVE(width); 51793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int uv_height = HALVE(height); 52793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int uv_stride = uv_width; 53793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int uv0_stride = 0; 54793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int a_width, a_stride; 55793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint64_t y_size, uv_size, uv0_size, a_size, total_size; 56793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t* mem; 57793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 58793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // U/V 59793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler switch (uv_csp) { 60793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler case WEBP_YUV420: 61793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler break; 62793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#ifdef WEBP_EXPERIMENTAL_FEATURES 63793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler case WEBP_YUV400: // for now, we'll just reset the U/V samples 64793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler break; 65793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler case WEBP_YUV422: 66793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv0_stride = uv_width; 67793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler break; 68793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler case WEBP_YUV444: 69793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv0_stride = width; 70793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler break; 71793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 72793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler default: 73793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 74793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 75793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv0_size = height * uv0_stride; 76793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 77793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // alpha 78793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler a_width = has_alpha ? width : 0; 79793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler a_stride = a_width; 80793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler y_size = (uint64_t)y_stride * height; 81793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv_size = (uint64_t)uv_stride * uv_height; 82793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler a_size = (uint64_t)a_stride * height; 83793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 84793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler total_size = y_size + a_size + 2 * uv_size + 2 * uv0_size; 85793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 86793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Security and validation checks 87793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width <= 0 || height <= 0 || // luma/alpha param error 88793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv_width < 0 || uv_height < 0) { // u/v param error 89793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 90793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 91793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Clear previous buffer and allocate a new one. 92793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(picture); // erase previous buffer 93793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*mem)); 94793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (mem == NULL) return 0; 95793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 96793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // From now on, we're in the clear, we can no longer fail... 97793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->memory_ = (void*)mem; 98793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->y_stride = y_stride; 99793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->uv_stride = uv_stride; 100793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->a_stride = a_stride; 101793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->uv0_stride = uv0_stride; 102793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // TODO(skal): we could align the y/u/v planes and adjust stride. 103793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->y = mem; 104793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem += y_size; 105793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 106793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->u = mem; 107793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem += uv_size; 108793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->v = mem; 109793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem += uv_size; 110793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 111793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (a_size) { 112793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->a = mem; 113793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem += a_size; 114793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 115793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (uv0_size) { 116793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->u0 = mem; 117793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem += uv0_size; 118793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->v0 = mem; 119793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler mem += uv0_size; 120793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 121793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 122793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler void* memory; 123793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint64_t argb_size = (uint64_t)width * height; 124793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width <= 0 || height <= 0) { 125793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 126793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 127793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Clear previous buffer and allocate a new one. 128793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(picture); // erase previous buffer 129793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memory = WebPSafeMalloc(argb_size, sizeof(*picture->argb)); 130793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (memory == NULL) return 0; 131793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 132793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // TODO(skal): align plane to cache line? 133793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->memory_argb_ = memory; 134793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb = (uint32_t*)memory; 135793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb_stride = width; 136793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 137793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 138793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 139793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 140793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 141793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Remove reference to the ARGB buffer (doesn't free anything). 142793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void PictureResetARGB(WebPPicture* const picture) { 143793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->memory_argb_ = NULL; 144793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb = NULL; 145793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb_stride = 0; 146793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 147793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 148793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Remove reference to the YUVA buffer (doesn't free anything). 149793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void PictureResetYUVA(WebPPicture* const picture) { 150793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->memory_ = NULL; 151793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->y = picture->u = picture->v = picture->a = NULL; 152793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->u0 = picture->v0 = NULL; 153793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->y_stride = picture->uv_stride = 0; 154793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->a_stride = 0; 155793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->uv0_stride = 0; 156793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 157793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 158793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Grab the 'specs' (writer, *opaque, width, height...) from 'src' and copy them 159793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// into 'dst'. Mark 'dst' as not owning any memory. 160793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void WebPPictureGrabSpecs(const WebPPicture* const src, 161793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture* const dst) { 162793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler assert(src != NULL && dst != NULL); 163793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *dst = *src; 164793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler PictureResetYUVA(dst); 165793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler PictureResetARGB(dst); 166793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 167793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 168793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Allocate a new argb buffer, discarding any existing one and preserving 169793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// the other YUV(A) buffer. 170793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic int PictureAllocARGB(WebPPicture* const picture) { 171793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture tmp; 172793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler free(picture->memory_argb_); 173793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler PictureResetARGB(picture); 174793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->use_argb = 1; 175793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureGrabSpecs(picture, &tmp); 176793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPPictureAlloc(&tmp)) { 177793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); 178793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 179793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->memory_argb_ = tmp.memory_argb_; 180793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb = tmp.argb; 181793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb_stride = tmp.argb_stride; 182793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 183793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 184793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 185793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Release memory owned by 'picture' (both YUV and ARGB buffers). 186793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslervoid WebPPictureFree(WebPPicture* picture) { 187793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture != NULL) { 188793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler free(picture->memory_); 189793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler free(picture->memory_argb_); 190793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler PictureResetYUVA(picture); 191793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler PictureResetARGB(picture); 192793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 193793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 194793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 195793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 196793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Picture copying 197793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 198793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Not worth moving to dsp/enc.c (only used here). 199793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void CopyPlane(const uint8_t* src, int src_stride, 200793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t* dst, int dst_stride, int width, int height) { 201793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler while (height-- > 0) { 202793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memcpy(dst, src, width); 203793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src += src_stride; 204793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst += dst_stride; 205793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 206793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 207793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 208793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Adjust top-left corner to chroma sample position. 209793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void SnapTopLeftPosition(const WebPPicture* const pic, 210793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int* const left, int* const top) { 211793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!pic->use_argb) { 212793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int is_yuv422 = IS_YUV_CSP(pic->colorspace, WEBP_YUV422); 213793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (IS_YUV_CSP(pic->colorspace, WEBP_YUV420) || is_yuv422) { 214793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *left &= ~1; 215793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!is_yuv422) *top &= ~1; 216793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 217793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 218793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 219793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 220793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Adjust top-left corner and verify that the sub-rectangle is valid. 221793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic int AdjustAndCheckRectangle(const WebPPicture* const pic, 222793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int* const left, int* const top, 223793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int width, int height) { 224793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler SnapTopLeftPosition(pic, left, top); 225793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if ((*left) < 0 || (*top) < 0) return 0; 226793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width <= 0 || height <= 0) return 0; 227793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if ((*left) + width > pic->width) return 0; 228793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if ((*top) + height > pic->height) return 0; 229793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 230793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 231793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 232793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureCopy(const WebPPicture* src, WebPPicture* dst) { 233793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src == NULL || dst == NULL) return 0; 234793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src == dst) return 1; 235793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 236793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureGrabSpecs(src, dst); 237793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPPictureAlloc(dst)) return 0; 238793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 239793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!src->use_argb) { 240793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src->y, src->y_stride, 241793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->y, dst->y_stride, dst->width, dst->height); 242793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src->u, src->uv_stride, 243793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->u, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); 244793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src->v, src->uv_stride, 245793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->v, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); 246793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (dst->a != NULL) { 247793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src->a, src->a_stride, 248793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->a, dst->a_stride, dst->width, dst->height); 249793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 250793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#ifdef WEBP_EXPERIMENTAL_FEATURES 251793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (dst->u0 != NULL) { 252793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int uv0_width = src->width; 253793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (IS_YUV_CSP(dst->colorspace, WEBP_YUV422)) { 254793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv0_width = HALVE(uv0_width); 255793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 256793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src->u0, src->uv0_stride, 257793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->u0, dst->uv0_stride, uv0_width, dst->height); 258793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src->v0, src->uv0_stride, 259793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->v0, dst->uv0_stride, uv0_width, dst->height); 260793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 261793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 262793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 263793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane((const uint8_t*)src->argb, 4 * src->argb_stride, 264793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (uint8_t*)dst->argb, 4 * dst->argb_stride, 265793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 4 * dst->width, dst->height); 266793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 267793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 268793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 269793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 270793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureIsView(const WebPPicture* picture) { 271793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture == NULL) return 0; 272793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture->use_argb) { 273793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return (picture->memory_argb_ == NULL); 274793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 275793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return (picture->memory_ == NULL); 276793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 277793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 278793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureView(const WebPPicture* src, 279793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int left, int top, int width, int height, 280793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture* dst) { 281793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src == NULL || dst == NULL) return 0; 282793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 283793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // verify rectangle position. 284793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!AdjustAndCheckRectangle(src, &left, &top, width, height)) return 0; 285793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 286793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src != dst) { // beware of aliasing! We don't want to leak 'memory_'. 287793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureGrabSpecs(src, dst); 288793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 289793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->width = width; 290793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->height = height; 291793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!src->use_argb) { 292793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->y = src->y + top * src->y_stride + left; 293793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->u = src->u + (top >> 1) * src->uv_stride + (left >> 1); 294793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->v = src->v + (top >> 1) * src->uv_stride + (left >> 1); 295793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->y_stride = src->y_stride; 296793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->uv_stride = src->uv_stride; 297793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src->a != NULL) { 298793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->a = src->a + top * src->a_stride + left; 299793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->a_stride = src->a_stride; 300793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 301793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#ifdef WEBP_EXPERIMENTAL_FEATURES 302793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src->u0 != NULL) { 303793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int left_pos = 304793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler IS_YUV_CSP(dst->colorspace, WEBP_YUV422) ? (left >> 1) : left; 305793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->u0 = src->u0 + top * src->uv0_stride + left_pos; 306793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->v0 = src->v0 + top * src->uv0_stride + left_pos; 307793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->uv0_stride = src->uv0_stride; 308793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 309793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 310793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 311793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->argb = src->argb + top * src->argb_stride + left; 312793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst->argb_stride = src->argb_stride; 313793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 314793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 315793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 316793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 317793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 318793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Picture cropping 319793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 320793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureCrop(WebPPicture* pic, 321793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int left, int top, int width, int height) { 322793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture tmp; 323793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 324793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (pic == NULL) return 0; 325793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!AdjustAndCheckRectangle(pic, &left, &top, width, height)) return 0; 326793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 327793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureGrabSpecs(pic, &tmp); 328793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.width = width; 329793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.height = height; 330793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPPictureAlloc(&tmp)) return 0; 331793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 332793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!pic->use_argb) { 333793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int y_offset = top * pic->y_stride + left; 334793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int uv_offset = (top / 2) * pic->uv_stride + left / 2; 335793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(pic->y + y_offset, pic->y_stride, 336793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.y, tmp.y_stride, width, height); 337793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(pic->u + uv_offset, pic->uv_stride, 338793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.u, tmp.uv_stride, HALVE(width), HALVE(height)); 339793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(pic->v + uv_offset, pic->uv_stride, 340793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.v, tmp.uv_stride, HALVE(width), HALVE(height)); 341793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 342793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (tmp.a != NULL) { 343793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int a_offset = top * pic->a_stride + left; 344793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(pic->a + a_offset, pic->a_stride, 345793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.a, tmp.a_stride, width, height); 346793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 347793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#ifdef WEBP_EXPERIMENTAL_FEATURES 348793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (tmp.u0 != NULL) { 349793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int w = width; 350793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int left_pos = left; 351793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (IS_YUV_CSP(tmp.colorspace, WEBP_YUV422)) { 352793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler w = HALVE(w); 353793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler left_pos = HALVE(left_pos); 354793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 355793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(pic->u0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, 356793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.u0, tmp.uv0_stride, w, height); 357793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(pic->v0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, 358793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.v0, tmp.uv0_stride, w, height); 359793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 360793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 361793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 362793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const src = 363793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (const uint8_t*)(pic->argb + top * pic->argb_stride + left); 364793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler CopyPlane(src, pic->argb_stride * 4, 365793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (uint8_t*)tmp.argb, tmp.argb_stride * 4, 366793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler width * 4, height); 367793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 368793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(pic); 369793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *pic = tmp; 370793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 371793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 372793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 373793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 374793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Simple picture rescaler 375793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 376793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void RescalePlane(const uint8_t* src, 377793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int src_width, int src_height, int src_stride, 378793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t* dst, 379793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int dst_width, int dst_height, int dst_stride, 380793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int32_t* const work, 381793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int num_channels) { 382793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPRescaler rescaler; 383793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int y = 0; 384793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPRescalerInit(&rescaler, src_width, src_height, 385793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst, dst_width, dst_height, dst_stride, 386793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler num_channels, 387793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src_width, dst_width, 388793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src_height, dst_height, 389793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler work); 390793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memset(work, 0, 2 * dst_width * num_channels * sizeof(*work)); 391793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler while (y < src_height) { 392793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler y += WebPRescalerImport(&rescaler, src_height - y, 393793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src + y * src_stride, src_stride); 394793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPRescalerExport(&rescaler); 395793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 396793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 397793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 398793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureRescale(WebPPicture* pic, int width, int height) { 399793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture tmp; 400793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int prev_width, prev_height; 401793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int32_t* work; 402793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 403793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (pic == NULL) return 0; 404793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler prev_width = pic->width; 405793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler prev_height = pic->height; 406793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // if width is unspecified, scale original proportionally to height ratio. 407793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width == 0) { 408793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler width = (prev_width * height + prev_height / 2) / prev_height; 409793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 410793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // if height is unspecified, scale original proportionally to width ratio. 411793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (height == 0) { 412793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler height = (prev_height * width + prev_width / 2) / prev_width; 413793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 414793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Check if the overall dimensions still make sense. 415793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width <= 0 || height <= 0) return 0; 416793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 417793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureGrabSpecs(pic, &tmp); 418793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.width = width; 419793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.height = height; 420793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPPictureAlloc(&tmp)) return 0; 421793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 422793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!pic->use_argb) { 423793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler work = (int32_t*)WebPSafeMalloc(2ULL * width, sizeof(*work)); 424793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (work == NULL) { 425793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(&tmp); 426793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 427793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 428793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 429793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane(pic->y, prev_width, prev_height, pic->y_stride, 430793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.y, width, height, tmp.y_stride, work, 1); 431793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane(pic->u, 432793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler HALVE(prev_width), HALVE(prev_height), pic->uv_stride, 433793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.u, 434793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler HALVE(width), HALVE(height), tmp.uv_stride, work, 1); 435793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane(pic->v, 436793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler HALVE(prev_width), HALVE(prev_height), pic->uv_stride, 437793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.v, 438793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler HALVE(width), HALVE(height), tmp.uv_stride, work, 1); 439793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 440793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (tmp.a != NULL) { 441793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane(pic->a, prev_width, prev_height, pic->a_stride, 442793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.a, width, height, tmp.a_stride, work, 1); 443793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 444793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#ifdef WEBP_EXPERIMENTAL_FEATURES 445793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (tmp.u0 != NULL) { 446793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int s = IS_YUV_CSP(tmp.colorspace, WEBP_YUV422) ? 2 : 1; 447793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane( 448793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic->u0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, 449793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.u0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); 450793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane( 451793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic->v0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, 452793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.v0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); 453793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 454793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 455793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 456793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler work = (int32_t*)WebPSafeMalloc(2ULL * width * 4, sizeof(*work)); 457793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (work == NULL) { 458793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(&tmp); 459793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 460793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 461793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 462793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RescalePlane((const uint8_t*)pic->argb, prev_width, prev_height, 463793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic->argb_stride * 4, 464793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (uint8_t*)tmp.argb, width, height, 465793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.argb_stride * 4, 466793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler work, 4); 467793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 468793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(pic); 469793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler free(work); 470793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *pic = tmp; 471793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 472793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 473793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 474793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 475793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// WebPMemoryWriter: Write-to-memory 476793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 477793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslervoid WebPMemoryWriterInit(WebPMemoryWriter* writer) { 478793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler writer->mem = NULL; 479793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler writer->size = 0; 480793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler writer->max_size = 0; 481793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 482793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 483793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPMemoryWrite(const uint8_t* data, size_t data_size, 484793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const WebPPicture* picture) { 485793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPMemoryWriter* const w = (WebPMemoryWriter*)picture->custom_ptr; 486793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint64_t next_size; 487793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (w == NULL) { 488793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 489793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 490793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler next_size = (uint64_t)w->size + data_size; 491793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (next_size > w->max_size) { 492793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t* new_mem; 493793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint64_t next_max_size = 2ULL * w->max_size; 494793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (next_max_size < next_size) next_max_size = next_size; 495793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (next_max_size < 8192ULL) next_max_size = 8192ULL; 496793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler new_mem = (uint8_t*)WebPSafeMalloc(next_max_size, 1); 497793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (new_mem == NULL) { 498793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 499793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 500793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (w->size > 0) { 501793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memcpy(new_mem, w->mem, w->size); 502793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 503793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler free(w->mem); 504793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler w->mem = new_mem; 505793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // down-cast is ok, thanks to WebPSafeMalloc 506793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler w->max_size = (size_t)next_max_size; 507793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 508793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (data_size > 0) { 509793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memcpy(w->mem + w->size, data, data_size); 510793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler w->size += data_size; 511793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 512793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 513793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 514793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 515793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 516793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Detection of non-trivial transparency 517793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 518793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Returns true if alpha[] has non-0xff values. 519793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic int CheckNonOpaque(const uint8_t* alpha, int width, int height, 520793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x_step, int y_step) { 521793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (alpha == NULL) return 0; 522793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler while (height-- > 0) { 523793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x; 524793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width * x_step; x += x_step) { 525793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (alpha[x] != 0xff) return 1; // TODO(skal): check 4/8 bytes at a time. 526793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 527793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler alpha += y_step; 528793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 529793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 530793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 531793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 532793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Checking for the presence of non-opaque alpha. 533793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureHasTransparency(const WebPPicture* picture) { 534793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture == NULL) return 0; 535793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!picture->use_argb) { 536793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return CheckNonOpaque(picture->a, picture->width, picture->height, 537793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1, picture->a_stride); 538793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 539793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x, y; 540793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint32_t* argb = picture->argb; 541793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (argb == NULL) return 0; 542793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < picture->height; ++y) { 543793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < picture->width; ++x) { 544793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (argb[x] < 0xff000000u) return 1; // test any alpha values != 0xff 545793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 546793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler argb += picture->argb_stride; 547793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 548793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 549793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 550793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 551793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 552793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 553793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// RGB -> YUV conversion 554793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 555793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// TODO: we can do better than simply 2x2 averaging on U/V samples. 556793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define SUM4(ptr) ((ptr)[0] + (ptr)[step] + \ 557793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (ptr)[rgb_stride] + (ptr)[rgb_stride + step]) 558793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define SUM2H(ptr) (2 * (ptr)[0] + 2 * (ptr)[step]) 559793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define SUM2V(ptr) (2 * (ptr)[0] + 2 * (ptr)[rgb_stride]) 560793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define SUM1(ptr) (4 * (ptr)[0]) 561793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define RGB_TO_UV(x, y, SUM) { \ 562793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int src = (2 * (step * (x) + (y) * rgb_stride)); \ 563793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int dst = (x) + (y) * picture->uv_stride; \ 564793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int r = SUM(r_ptr + src); \ 565793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int g = SUM(g_ptr + src); \ 566793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int b = SUM(b_ptr + src); \ 567793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->u[dst] = VP8RGBToU(r, g, b); \ 568793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->v[dst] = VP8RGBToV(r, g, b); \ 569793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 570793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 571793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define RGB_TO_UV0(x_in, x_out, y, SUM) { \ 572793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int src = (step * (x_in) + (y) * rgb_stride); \ 573793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int dst = (x_out) + (y) * picture->uv0_stride; \ 574793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int r = SUM(r_ptr + src); \ 575793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int g = SUM(g_ptr + src); \ 576793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int b = SUM(b_ptr + src); \ 577793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->u0[dst] = VP8RGBToU(r, g, b); \ 578793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->v0[dst] = VP8RGBToV(r, g, b); \ 579793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 580793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 581793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic void MakeGray(WebPPicture* const picture) { 582793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int y; 583793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int uv_width = HALVE(picture->width); 584793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int uv_height = HALVE(picture->height); 585793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < uv_height; ++y) { 586793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memset(picture->u + y * picture->uv_stride, 128, uv_width); 587793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memset(picture->v + y * picture->uv_stride, 128, uv_width); 588793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 589793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 590793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 591793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic int ImportYUVAFromRGBA(const uint8_t* const r_ptr, 592793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const g_ptr, 593793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const b_ptr, 594793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const a_ptr, 595793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int step, // bytes per pixel 596793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int rgb_stride, // bytes per scanline 597793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture* const picture) { 598793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; 599793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x, y; 600793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int width = picture->width; 601793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int height = picture->height; 602793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int has_alpha = CheckNonOpaque(a_ptr, width, height, step, rgb_stride); 603793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 604793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->colorspace = uv_csp; 605793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->use_argb = 0; 606793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (has_alpha) { 607793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->colorspace |= WEBP_CSP_ALPHA_BIT; 608793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 609793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPPictureAlloc(picture)) return 0; 610793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 611793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Import luma plane 612793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 613793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width; ++x) { 614793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int offset = step * x + y * rgb_stride; 615793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->y[x + y * picture->y_stride] = 616793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler VP8RGBToY(r_ptr[offset], g_ptr[offset], b_ptr[offset]); 617793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 618793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 619793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 620793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Downsample U/V plane 621793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (uv_csp != WEBP_YUV400) { 622793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < (height >> 1); ++y) { 623793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < (width >> 1); ++x) { 624793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV(x, y, SUM4); 625793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 626793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width & 1) { 627793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV(x, y, SUM2V); 628793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 629793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 630793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (height & 1) { 631793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < (width >> 1); ++x) { 632793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV(x, y, SUM2H); 633793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 634793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width & 1) { 635793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV(x, y, SUM1); 636793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 637793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 638793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 639793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#ifdef WEBP_EXPERIMENTAL_FEATURES 640793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Store original U/V samples too 641793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (uv_csp == WEBP_YUV422) { 642793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 643793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < (width >> 1); ++x) { 644793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV0(2 * x, x, y, SUM2H); 645793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 646793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (width & 1) { 647793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV0(2 * x, x, y, SUM1); 648793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 649793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 650793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else if (uv_csp == WEBP_YUV444) { 651793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 652793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width; ++x) { 653793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler RGB_TO_UV0(x, x, y, SUM1); 654793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 655793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 656793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 657793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 658793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 659793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler MakeGray(picture); 660793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 661793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 662793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (has_alpha) { 663793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler assert(step >= 4); 664793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 665793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width; ++x) { 666793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->a[x + y * picture->a_stride] = 667793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler a_ptr[step * x + y * rgb_stride]; 668793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 669793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 670793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 671793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 672793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 673793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 674793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic int Import(WebPPicture* const picture, 675793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const rgb, int rgb_stride, 676793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int step, int swap_rb, int import_alpha) { 677793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const r_ptr = rgb + (swap_rb ? 2 : 0); 678793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const g_ptr = rgb + 1; 679793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const b_ptr = rgb + (swap_rb ? 0 : 2); 680793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const a_ptr = import_alpha ? rgb + 3 : NULL; 681793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int width = picture->width; 682793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int height = picture->height; 683793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 684793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!picture->use_argb) { 685793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return ImportYUVAFromRGBA(r_ptr, g_ptr, b_ptr, a_ptr, step, rgb_stride, 686793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture); 687793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 688793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (import_alpha) { 689793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->colorspace |= WEBP_CSP_ALPHA_BIT; 690793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 691793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->colorspace &= ~WEBP_CSP_ALPHA_BIT; 692793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 693793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPPictureAlloc(picture)) return 0; 694793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 695793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!import_alpha) { 696793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x, y; 697793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 698793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width; ++x) { 699793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int offset = step * x + y * rgb_stride; 700793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint32_t argb = 701793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 0xff000000u | 702793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (r_ptr[offset] << 16) | 703793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (g_ptr[offset] << 8) | 704793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (b_ptr[offset]); 705793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb[x + y * picture->argb_stride] = argb; 706793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 707793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 708793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 709793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x, y; 710793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler assert(step >= 4); 711793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 712793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width; ++x) { 713793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int offset = step * x + y * rgb_stride; 714793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint32_t argb = ((uint32_t)a_ptr[offset] << 24) | 715793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (r_ptr[offset] << 16) | 716793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (g_ptr[offset] << 8) | 717793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (b_ptr[offset]); 718793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->argb[x + y * picture->argb_stride] = argb; 719793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 720793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 721793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 722793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 723793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 724793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef SUM4 725793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef SUM2V 726793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef SUM2H 727793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef SUM1 728793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef RGB_TO_UV 729793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 730793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureImportRGB(WebPPicture* picture, 731793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* rgb, int rgb_stride) { 732793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Import(picture, rgb, rgb_stride, 3, 0, 0); 733793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 734793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 735793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureImportBGR(WebPPicture* picture, 736793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* rgb, int rgb_stride) { 737793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Import(picture, rgb, rgb_stride, 3, 1, 0); 738793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 739793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 740793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureImportRGBA(WebPPicture* picture, 741793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* rgba, int rgba_stride) { 742793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Import(picture, rgba, rgba_stride, 4, 0, 1); 743793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 744793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 745793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureImportBGRA(WebPPicture* picture, 746793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* rgba, int rgba_stride) { 747793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Import(picture, rgba, rgba_stride, 4, 1, 1); 748793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 749793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 750793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureImportRGBX(WebPPicture* picture, 751793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* rgba, int rgba_stride) { 752793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Import(picture, rgba, rgba_stride, 4, 0, 0); 753793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 754793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 755793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureImportBGRX(WebPPicture* picture, 756793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* rgba, int rgba_stride) { 757793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Import(picture, rgba, rgba_stride, 4, 1, 0); 758793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 759793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 760793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 761793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Automatic YUV <-> ARGB conversions. 762793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 763793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureYUVAToARGB(WebPPicture* picture) { 764793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture == NULL) return 0; 765793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture->memory_ == NULL || picture->y == NULL || 766793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler picture->u == NULL || picture->v == NULL) { 767793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); 768793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 769793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if ((picture->colorspace & WEBP_CSP_ALPHA_BIT) && picture->a == NULL) { 770793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); 771793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 772793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if ((picture->colorspace & WEBP_CSP_UV_MASK) != WEBP_YUV420) { 773793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); 774793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 775793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Allocate a new argb buffer (discarding the previous one). 776793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!PictureAllocARGB(picture)) return 0; 777793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 778793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Convert 779793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler { 780793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int y; 781793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int width = picture->width; 782793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int height = picture->height; 783793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int argb_stride = 4 * picture->argb_stride; 784793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t* dst = (uint8_t*)picture->argb; 785793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t *cur_u = picture->u, *cur_v = picture->v, *cur_y = picture->y; 786793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPUpsampleLinePairFunc upsample = WebPGetLinePairConverter(ALPHA_IS_LAST); 787793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 788793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // First row, with replicated top samples. 789793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, width); 790793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler cur_y += picture->y_stride; 791793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst += argb_stride; 792793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Center rows. 793793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 1; y + 1 < height; y += 2) { 794793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const top_u = cur_u; 795793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const top_v = cur_v; 796793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler cur_u += picture->uv_stride; 797793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler cur_v += picture->uv_stride; 798793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler upsample(cur_y, cur_y + picture->y_stride, top_u, top_v, cur_u, cur_v, 799793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst, dst + argb_stride, width); 800793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler cur_y += 2 * picture->y_stride; 801793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler dst += 2 * argb_stride; 802793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 803793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Last row (if needed), with replicated bottom samples. 804793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (height > 1 && !(height & 1)) { 805793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, dst, NULL, width); 806793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 807793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Insert alpha values if needed, in replacement for the default 0xff ones. 808793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture->colorspace & WEBP_CSP_ALPHA_BIT) { 809793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < height; ++y) { 810793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint32_t* const argb_dst = picture->argb + y * picture->argb_stride; 811793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const src = picture->a + y * picture->a_stride; 812793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x; 813793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < width; ++x) { 814793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler argb_dst[x] = (argb_dst[x] & 0x00ffffffu) | ((uint32_t)src[x] << 24); 815793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 816793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 817793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 818793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 819793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 820793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 821793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 822793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace) { 823793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture == NULL) return 0; 824793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (picture->argb == NULL) { 825793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); 826793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 827793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const argb = (const uint8_t*)picture->argb; 828793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const r = ALPHA_IS_LAST ? argb + 2 : argb + 1; 829793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const g = ALPHA_IS_LAST ? argb + 1 : argb + 2; 830793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const b = ALPHA_IS_LAST ? argb + 0 : argb + 3; 831793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* const a = ALPHA_IS_LAST ? argb + 3 : argb + 0; 832793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // We work on a tmp copy of 'picture', because ImportYUVAFromRGBA() 833793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // would be calling WebPPictureFree(picture) otherwise. 834793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture tmp = *picture; 835793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler PictureResetARGB(&tmp); // reset ARGB buffer so that it's not free()'d. 836793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.use_argb = 0; 837793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.colorspace = colorspace & WEBP_CSP_UV_MASK; 838793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!ImportYUVAFromRGBA(r, g, b, a, 4, 4 * picture->argb_stride, &tmp)) { 839793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); 840793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 841793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Copy back the YUV specs into 'picture'. 842793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.argb = picture->argb; 843793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.argb_stride = picture->argb_stride; 844793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler tmp.memory_argb_ = picture->memory_argb_; 845793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *picture = tmp; 846793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 847793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 848793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 849793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 850793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 851793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Helper: clean up fully transparent area to help compressibility. 852793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 853793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define SIZE 8 854793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define SIZE2 (SIZE / 2) 855793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic int is_transparent_area(const uint8_t* ptr, int stride, int size) { 856793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int y, x; 857793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < size; ++y) { 858793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < size; ++x) { 859793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (ptr[x]) { 860793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 861793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 862793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 863793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ptr += stride; 864793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 865793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 866793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 867793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 868793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic WEBP_INLINE void flatten(uint8_t* ptr, int v, int stride, int size) { 869793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int y; 870793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < size; ++y) { 871793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memset(ptr, v, size); 872793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ptr += stride; 873793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 874793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 875793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 876793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslervoid WebPCleanupTransparentArea(WebPPicture* pic) { 877793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x, y, w, h; 878793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* a_ptr; 879793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int values[3] = { 0 }; 880793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 881793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (pic == NULL) return; 882793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 883793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler a_ptr = pic->a; 884793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (a_ptr == NULL) return; // nothing to do 885793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 886793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler w = pic->width / SIZE; 887793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler h = pic->height / SIZE; 888793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < h; ++y) { 889793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int need_reset = 1; 890793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < w; ++x) { 891793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int off_a = (y * pic->a_stride + x) * SIZE; 892793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int off_y = (y * pic->y_stride + x) * SIZE; 893793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int off_uv = (y * pic->uv_stride + x) * SIZE2; 894793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (is_transparent_area(a_ptr + off_a, pic->a_stride, SIZE)) { 895793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (need_reset) { 896793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler values[0] = pic->y[off_y]; 897793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler values[1] = pic->u[off_uv]; 898793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler values[2] = pic->v[off_uv]; 899793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler need_reset = 0; 900793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 901793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler flatten(pic->y + off_y, values[0], pic->y_stride, SIZE); 902793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler flatten(pic->u + off_uv, values[1], pic->uv_stride, SIZE2); 903793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler flatten(pic->v + off_uv, values[2], pic->uv_stride, SIZE2); 904793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 905793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler need_reset = 1; 906793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 907793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 908793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // ignore the left-overs on right/bottom 909793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 910793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 911793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 912793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef SIZE 913793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef SIZE2 914793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 915793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 916793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// local-min distortion 917793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// 918793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// For every pixel in the *reference* picture, we search for the local best 919793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// match in the compressed image. This is not a symmetrical measure. 920793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 921793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// search radius. Shouldn't be too large. 922793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define RADIUS 2 923793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 924793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic float AccumulateLSIM(const uint8_t* src, int src_stride, 925793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* ref, int ref_stride, 926793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int w, int h) { 927793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int x, y; 928793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler double total_sse = 0.; 929793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (y = 0; y < h; ++y) { 930793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int y_0 = (y - RADIUS < 0) ? 0 : y - RADIUS; 931793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int y_1 = (y + RADIUS + 1 >= h) ? h : y + RADIUS + 1; 932793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (x = 0; x < w; ++x) { 933793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int x_0 = (x - RADIUS < 0) ? 0 : x - RADIUS; 934793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const int x_1 = (x + RADIUS + 1 >= w) ? w : x + RADIUS + 1; 935793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler double best_sse = 255. * 255.; 936793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const double value = (double)ref[y * ref_stride + x]; 937793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int i, j; 938793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (j = y_0; j < y_1; ++j) { 939793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const uint8_t* s = src + j * src_stride; 940793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (i = x_0; i < x_1; ++i) { 941793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const double sse = (double)(s[i] - value) * (s[i] - value); 942793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (sse < best_sse) best_sse = sse; 943793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 944793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 945793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler total_sse += best_sse; 946793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 947793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 948793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return (float)total_sse; 949793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 950793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef RADIUS 951793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 952793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 953793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Distortion 954793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 955793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Max value returned in case of exact similarity. 956793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic const double kMinDistortion_dB = 99.; 957793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic float GetPSNR(const double v) { 958793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return (float)((v > 0.) ? -4.3429448 * log(v / (255 * 255.)) 959793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler : kMinDistortion_dB); 960793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 961793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 962793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerint WebPPictureDistortion(const WebPPicture* src, const WebPPicture* ref, 963793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int type, float result[5]) { 964793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler DistoStats stats[5]; 965793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int has_alpha; 966793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int uv_w, uv_h; 967793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 968793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src == NULL || ref == NULL || 969793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->width != ref->width || src->height != ref->height || 970793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->y == NULL || ref->y == NULL || 971793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->u == NULL || ref->u == NULL || 972793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->v == NULL || ref->v == NULL || 973793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result == NULL) { 974793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 975793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 976793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // TODO(skal): provide distortion for ARGB too. 977793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (src->use_argb == 1 || src->use_argb != ref->use_argb) { 978793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 979793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 980793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 981793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler has_alpha = !!(src->colorspace & WEBP_CSP_ALPHA_BIT); 982793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (has_alpha != !!(ref->colorspace & WEBP_CSP_ALPHA_BIT) || 983793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler (has_alpha && (src->a == NULL || ref->a == NULL))) { 984793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 985793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 986793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 987793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler memset(stats, 0, sizeof(stats)); 988793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 989793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv_w = HALVE(src->width); 990793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv_h = HALVE(src->height); 991793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (type >= 2) { 992793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler float sse[4]; 993793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler sse[0] = AccumulateLSIM(src->y, src->y_stride, 994793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->y, ref->y_stride, src->width, src->height); 995793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler sse[1] = AccumulateLSIM(src->u, src->uv_stride, 996793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->u, ref->uv_stride, uv_w, uv_h); 997793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler sse[2] = AccumulateLSIM(src->v, src->uv_stride, 998793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->v, ref->uv_stride, uv_w, uv_h); 999793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler sse[3] = has_alpha ? AccumulateLSIM(src->a, src->a_stride, 1000793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->a, ref->a_stride, 1001793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->width, src->height) 1002793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler : 0.f; 1003793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[0] = GetPSNR(sse[0] / (src->width * src->height)); 1004793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[1] = GetPSNR(sse[1] / (uv_w * uv_h)); 1005793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[2] = GetPSNR(sse[2] / (uv_w * uv_h)); 1006793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[3] = GetPSNR(sse[3] / (src->width * src->height)); 1007793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler { 1008793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler double total_sse = sse[0] + sse[1] + sse[2]; 1009793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int total_pixels = src->width * src->height + 2 * uv_w * uv_h; 1010793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (has_alpha) { 1011793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler total_pixels += src->width * src->height; 1012793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler total_sse += sse[3]; 1013793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1014793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[4] = GetPSNR(total_sse / total_pixels); 1015793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1016793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 1017793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int c; 1018793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler VP8SSIMAccumulatePlane(src->y, src->y_stride, 1019793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->y, ref->y_stride, 1020793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->width, src->height, &stats[0]); 1021793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler VP8SSIMAccumulatePlane(src->u, src->uv_stride, 1022793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->u, ref->uv_stride, 1023793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv_w, uv_h, &stats[1]); 1024793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler VP8SSIMAccumulatePlane(src->v, src->uv_stride, 1025793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->v, ref->uv_stride, 1026793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uv_w, uv_h, &stats[2]); 1027793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (has_alpha) { 1028793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler VP8SSIMAccumulatePlane(src->a, src->a_stride, 1029793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ref->a, ref->a_stride, 1030793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler src->width, src->height, &stats[3]); 1031793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1032793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler for (c = 0; c <= 4; ++c) { 1033793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (type == 1) { 1034793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const double v = VP8SSIMGet(&stats[c]); 1035793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[c] = (float)((v < 1.) ? -10.0 * log10(1. - v) 1036793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler : kMinDistortion_dB); 1037793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } else { 1038793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler const double v = VP8SSIMGetSquaredError(&stats[c]); 1039793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler result[c] = GetPSNR(v); 1040793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1041793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler // Accumulate forward 1042793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); 1043793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1044793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1045793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 1; 1046793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 1047793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1048793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 1049793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler// Simplest high-level calls: 1050793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1051793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslertypedef int (*Importer)(WebPPicture* const, const uint8_t* const, int); 1052793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1053793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslerstatic size_t Encode(const uint8_t* rgba, int width, int height, int stride, 1054793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler Importer import, float quality_factor, int lossless, 1055793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t** output) { 1056793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPicture pic; 1057793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPConfig config; 1058793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPMemoryWriter wrt; 1059793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler int ok; 1060793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1061793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!WebPConfigPreset(&config, WEBP_PRESET_DEFAULT, quality_factor) || 1062793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler !WebPPictureInit(&pic)) { 1063793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; // shouldn't happen, except if system installation is broken 1064793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1065793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1066793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler config.lossless = !!lossless; 1067793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic.use_argb = !!lossless; 1068793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic.width = width; 1069793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic.height = height; 1070793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic.writer = WebPMemoryWrite; 1071793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler pic.custom_ptr = &wrt; 1072793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPMemoryWriterInit(&wrt); 1073793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1074793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler ok = import(&pic, rgba, stride) && WebPEncode(&config, &pic); 1075793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler WebPPictureFree(&pic); 1076793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler if (!ok) { 1077793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler free(wrt.mem); 1078793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *output = NULL; 1079793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return 0; 1080793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler } 1081793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler *output = wrt.mem; 1082793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return wrt.size; 1083793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 1084793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1085793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define ENCODE_FUNC(NAME, IMPORTER) \ 1086793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslersize_t NAME(const uint8_t* in, int w, int h, int bps, float q, \ 1087793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler uint8_t** out) { \ 1088793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Encode(in, w, h, bps, IMPORTER, q, 0, out); \ 1089793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 1090793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1091793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerENCODE_FUNC(WebPEncodeRGB, WebPPictureImportRGB); 1092793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerENCODE_FUNC(WebPEncodeBGR, WebPPictureImportBGR); 1093793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerENCODE_FUNC(WebPEncodeRGBA, WebPPictureImportRGBA); 1094793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerENCODE_FUNC(WebPEncodeBGRA, WebPPictureImportBGRA); 1095793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1096793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef ENCODE_FUNC 1097793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1098793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define LOSSLESS_DEFAULT_QUALITY 70. 1099793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#define LOSSLESS_ENCODE_FUNC(NAME, IMPORTER) \ 1100793ee12c6df9cad3806238d32528c49a3ff9331dNoah Preslersize_t NAME(const uint8_t* in, int w, int h, int bps, uint8_t** out) { \ 1101793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler return Encode(in, w, h, bps, IMPORTER, LOSSLESS_DEFAULT_QUALITY, 1, out); \ 1102793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} 1103793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1104793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerLOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGB, WebPPictureImportRGB); 1105793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerLOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGR, WebPPictureImportBGR); 1106793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerLOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGBA, WebPPictureImportRGBA); 1107793ee12c6df9cad3806238d32528c49a3ff9331dNoah PreslerLOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGRA, WebPPictureImportBGRA); 1108793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1109793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#undef LOSSLESS_ENCODE_FUNC 1110793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1111793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler//------------------------------------------------------------------------------ 1112793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler 1113793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#if defined(__cplusplus) || defined(c_plusplus) 1114793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler} // extern "C" 1115793ee12c6df9cad3806238d32528c49a3ff9331dNoah Presler#endif 1116