15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright 2011 Google Inc. All Rights Reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 3eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// Use of this source code is governed by a BSD-style license 4eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// that can be found in the COPYING file in the root of the source 5eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// tree. An additional intellectual property rights grant can be found 6eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// in the file PATENTS. All contributing project authors may 7eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// be found in the AUTHORS file in the root of the source tree. 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ----------------------------------------------------------------------------- 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// WebPPicture utils: colorspace conversion, crop, ... 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Author: Skal (pascal.massimino@gmail.com) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <assert.h> 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdlib.h> 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <math.h> 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "./vp8enci.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "../utils/rescaler.h" 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "../utils/utils.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "../dsp/dsp.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "../dsp/yuv.h" 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__cplusplus) || defined(c_plusplus) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern "C" { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define HALVE(x) (((x) + 1) >> 1) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define IS_YUV_CSP(csp, YUV_CSP) (((csp) & WEBP_CSP_UV_MASK) == (YUV_CSP)) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const union { 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t argb; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t bytes[4]; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} test_endian = { 0xff000000u }; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define ALPHA_IS_LAST (test_endian.bytes[3] == 0xff) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// WebPPicture 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureAlloc(WebPPicture* picture) { 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture != NULL) { 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int has_alpha = picture->colorspace & WEBP_CSP_ALPHA_BIT; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int width = picture->width; 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int height = picture->height; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!picture->use_argb) { 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int y_stride = width; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int uv_width = HALVE(width); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int uv_height = HALVE(height); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int uv_stride = uv_width; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int uv0_stride = 0; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int a_width, a_stride; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint64_t y_size, uv_size, uv0_size, a_size, total_size; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t* mem; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // U/V 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (uv_csp) { 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case WEBP_YUV420: 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef WEBP_EXPERIMENTAL_FEATURES 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case WEBP_YUV400: // for now, we'll just reset the U/V samples 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case WEBP_YUV422: 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uv0_stride = uv_width; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case WEBP_YUV444: 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uv0_stride = width; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uv0_size = height * uv0_stride; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // alpha 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) a_width = has_alpha ? width : 0; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) a_stride = a_width; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) y_size = (uint64_t)y_stride * height; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uv_size = (uint64_t)uv_stride * uv_height; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) a_size = (uint64_t)a_stride * height; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) total_size = y_size + a_size + 2 * uv_size + 2 * uv0_size; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Security and validation checks 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width <= 0 || height <= 0 || // luma/alpha param error 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uv_width < 0 || uv_height < 0) { // u/v param error 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Clear previous buffer and allocate a new one. 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(picture); // erase previous buffer 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem = (uint8_t*)WebPSafeMalloc(total_size, sizeof(*mem)); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (mem == NULL) return 0; 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // From now on, we're in the clear, we can no longer fail... 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->memory_ = (void*)mem; 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->y_stride = y_stride; 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->uv_stride = uv_stride; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->a_stride = a_stride; 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->uv0_stride = uv0_stride; 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(skal): we could align the y/u/v planes and adjust stride. 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->y = mem; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem += y_size; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->u = mem; 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem += uv_size; 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->v = mem; 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem += uv_size; 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (a_size) { 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->a = mem; 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem += a_size; 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (uv0_size) { 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->u0 = mem; 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem += uv0_size; 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->v0 = mem; 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) mem += uv0_size; 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void* memory; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint64_t argb_size = (uint64_t)width * height; 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width <= 0 || height <= 0) { 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Clear previous buffer and allocate a new one. 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(picture); // erase previous buffer 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memory = WebPSafeMalloc(argb_size, sizeof(*picture->argb)); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (memory == NULL) return 0; 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(skal): align plane to cache line? 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->memory_argb_ = memory; 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb = (uint32_t*)memory; 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb_stride = width; 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Remove reference to the ARGB buffer (doesn't free anything). 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void PictureResetARGB(WebPPicture* const picture) { 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->memory_argb_ = NULL; 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb = NULL; 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb_stride = 0; 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Remove reference to the YUVA buffer (doesn't free anything). 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void PictureResetYUVA(WebPPicture* const picture) { 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->memory_ = NULL; 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->y = picture->u = picture->v = picture->a = NULL; 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->u0 = picture->v0 = NULL; 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->y_stride = picture->uv_stride = 0; 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->a_stride = 0; 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->uv0_stride = 0; 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Grab the 'specs' (writer, *opaque, width, height...) from 'src' and copy them 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// into 'dst'. Mark 'dst' as not owning any memory. 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void WebPPictureGrabSpecs(const WebPPicture* const src, 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture* const dst) { 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert(src != NULL && dst != NULL); 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *dst = *src; 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PictureResetYUVA(dst); 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PictureResetARGB(dst); 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Allocate a new argb buffer, discarding any existing one and preserving 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// the other YUV(A) buffer. 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int PictureAllocARGB(WebPPicture* const picture) { 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture tmp; 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(picture->memory_argb_); 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PictureResetARGB(picture); 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->use_argb = 1; 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureGrabSpecs(picture, &tmp); 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPPictureAlloc(&tmp)) { 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->memory_argb_ = tmp.memory_argb_; 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb = tmp.argb; 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb_stride = tmp.argb_stride; 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Release memory owned by 'picture' (both YUV and ARGB buffers). 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void WebPPictureFree(WebPPicture* picture) { 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture != NULL) { 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(picture->memory_); 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(picture->memory_argb_); 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PictureResetYUVA(picture); 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PictureResetARGB(picture); 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Picture copying 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Not worth moving to dsp/enc.c (only used here). 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void CopyPlane(const uint8_t* src, int src_stride, 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t* dst, int dst_stride, int width, int height) { 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (height-- > 0) { 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(dst, src, width); 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) src += src_stride; 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst += dst_stride; 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Adjust top-left corner to chroma sample position. 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void SnapTopLeftPosition(const WebPPicture* const pic, 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int* const left, int* const top) { 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!pic->use_argb) { 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int is_yuv422 = IS_YUV_CSP(pic->colorspace, WEBP_YUV422); 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IS_YUV_CSP(pic->colorspace, WEBP_YUV420) || is_yuv422) { 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *left &= ~1; 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!is_yuv422) *top &= ~1; 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Adjust top-left corner and verify that the sub-rectangle is valid. 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int AdjustAndCheckRectangle(const WebPPicture* const pic, 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int* const left, int* const top, 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int width, int height) { 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SnapTopLeftPosition(pic, left, top); 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((*left) < 0 || (*top) < 0) return 0; 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width <= 0 || height <= 0) return 0; 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((*left) + width > pic->width) return 0; 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((*top) + height > pic->height) return 0; 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureCopy(const WebPPicture* src, WebPPicture* dst) { 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (src == NULL || dst == NULL) return 0; 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (src == dst) return 1; 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureGrabSpecs(src, dst); 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPPictureAlloc(dst)) return 0; 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!src->use_argb) { 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src->y, src->y_stride, 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->y, dst->y_stride, dst->width, dst->height); 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src->u, src->uv_stride, 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->u, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src->v, src->uv_stride, 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->v, dst->uv_stride, HALVE(dst->width), HALVE(dst->height)); 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (dst->a != NULL) { 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src->a, src->a_stride, 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->a, dst->a_stride, dst->width, dst->height); 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef WEBP_EXPERIMENTAL_FEATURES 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (dst->u0 != NULL) { 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int uv0_width = src->width; 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IS_YUV_CSP(dst->colorspace, WEBP_YUV422)) { 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uv0_width = HALVE(uv0_width); 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src->u0, src->uv0_stride, 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->u0, dst->uv0_stride, uv0_width, dst->height); 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src->v0, src->uv0_stride, 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->v0, dst->uv0_stride, uv0_width, dst->height); 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane((const uint8_t*)src->argb, 4 * src->argb_stride, 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (uint8_t*)dst->argb, 4 * dst->argb_stride, 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4 * dst->width, dst->height); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureIsView(const WebPPicture* picture) { 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture == NULL) return 0; 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture->use_argb) { 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (picture->memory_argb_ == NULL); 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (picture->memory_ == NULL); 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureView(const WebPPicture* src, 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int left, int top, int width, int height, 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture* dst) { 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (src == NULL || dst == NULL) return 0; 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // verify rectangle position. 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!AdjustAndCheckRectangle(src, &left, &top, width, height)) return 0; 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (src != dst) { // beware of aliasing! We don't want to leak 'memory_'. 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureGrabSpecs(src, dst); 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->width = width; 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->height = height; 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!src->use_argb) { 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->y = src->y + top * src->y_stride + left; 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->u = src->u + (top >> 1) * src->uv_stride + (left >> 1); 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->v = src->v + (top >> 1) * src->uv_stride + (left >> 1); 2952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) dst->y_stride = src->y_stride; 2962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) dst->uv_stride = src->uv_stride; 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (src->a != NULL) { 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->a = src->a + top * src->a_stride + left; 2992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) dst->a_stride = src->a_stride; 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef WEBP_EXPERIMENTAL_FEATURES 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (src->u0 != NULL) { 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int left_pos = 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) IS_YUV_CSP(dst->colorspace, WEBP_YUV422) ? (left >> 1) : left; 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->u0 = src->u0 + top * src->uv0_stride + left_pos; 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->v0 = src->v0 + top * src->uv0_stride + left_pos; 3072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) dst->uv0_stride = src->uv0_stride; 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst->argb = src->argb + top * src->argb_stride + left; 3122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) dst->argb_stride = src->argb_stride; 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Picture cropping 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureCrop(WebPPicture* pic, 3215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int left, int top, int width, int height) { 3225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture tmp; 3235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pic == NULL) return 0; 3255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!AdjustAndCheckRectangle(pic, &left, &top, width, height)) return 0; 3265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureGrabSpecs(pic, &tmp); 3285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.width = width; 3295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.height = height; 3305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPPictureAlloc(&tmp)) return 0; 3315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!pic->use_argb) { 3335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int y_offset = top * pic->y_stride + left; 3345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int uv_offset = (top / 2) * pic->uv_stride + left / 2; 3355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(pic->y + y_offset, pic->y_stride, 3365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.y, tmp.y_stride, width, height); 3375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(pic->u + uv_offset, pic->uv_stride, 3385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.u, tmp.uv_stride, HALVE(width), HALVE(height)); 3395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(pic->v + uv_offset, pic->uv_stride, 3405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.v, tmp.uv_stride, HALVE(width), HALVE(height)); 3415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (tmp.a != NULL) { 3435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int a_offset = top * pic->a_stride + left; 3445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(pic->a + a_offset, pic->a_stride, 3455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.a, tmp.a_stride, width, height); 3465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef WEBP_EXPERIMENTAL_FEATURES 3485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (tmp.u0 != NULL) { 3495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int w = width; 3505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int left_pos = left; 3515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IS_YUV_CSP(tmp.colorspace, WEBP_YUV422)) { 3525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) w = HALVE(w); 3535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) left_pos = HALVE(left_pos); 3545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(pic->u0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, 3565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.u0, tmp.uv0_stride, w, height); 3575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(pic->v0 + top * pic->uv0_stride + left_pos, pic->uv0_stride, 3585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.v0, tmp.uv0_stride, w, height); 3595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 3615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 3625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const src = 3635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (const uint8_t*)(pic->argb + top * pic->argb_stride + left); 3645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CopyPlane(src, pic->argb_stride * 4, 3655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (uint8_t*)tmp.argb, tmp.argb_stride * 4, 3665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) width * 4, height); 3675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(pic); 3695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *pic = tmp; 3705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 3715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 3745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Simple picture rescaler 3755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void RescalePlane(const uint8_t* src, 3775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int src_width, int src_height, int src_stride, 3785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t* dst, 3795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int dst_width, int dst_height, int dst_stride, 3805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32_t* const work, 3815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int num_channels) { 3825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPRescaler rescaler; 3835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y = 0; 3845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPRescalerInit(&rescaler, src_width, src_height, 3855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst, dst_width, dst_height, dst_stride, 3865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) num_channels, 3875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) src_width, dst_width, 3885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) src_height, dst_height, 3895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) work); 3905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(work, 0, 2 * dst_width * num_channels * sizeof(*work)); 3915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (y < src_height) { 3925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) y += WebPRescalerImport(&rescaler, src_height - y, 3935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) src + y * src_stride, src_stride); 3945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPRescalerExport(&rescaler); 3955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureRescale(WebPPicture* pic, int width, int height) { 3995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture tmp; 4005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int prev_width, prev_height; 4015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32_t* work; 4025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pic == NULL) return 0; 4045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) prev_width = pic->width; 4055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) prev_height = pic->height; 4065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // if width is unspecified, scale original proportionally to height ratio. 4075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width == 0) { 4085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) width = (prev_width * height + prev_height / 2) / prev_height; 4095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // if height is unspecified, scale original proportionally to width ratio. 4115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (height == 0) { 4125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) height = (prev_height * width + prev_width / 2) / prev_width; 4135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Check if the overall dimensions still make sense. 4155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width <= 0 || height <= 0) return 0; 4165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureGrabSpecs(pic, &tmp); 4185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.width = width; 4195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.height = height; 4205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPPictureAlloc(&tmp)) return 0; 4215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!pic->use_argb) { 4235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) work = (int32_t*)WebPSafeMalloc(2ULL * width, sizeof(*work)); 4245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (work == NULL) { 4255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(&tmp); 4265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 4275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane(pic->y, prev_width, prev_height, pic->y_stride, 4305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.y, width, height, tmp.y_stride, work, 1); 4315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane(pic->u, 4325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HALVE(prev_width), HALVE(prev_height), pic->uv_stride, 4335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.u, 4345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HALVE(width), HALVE(height), tmp.uv_stride, work, 1); 4355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane(pic->v, 4365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HALVE(prev_width), HALVE(prev_height), pic->uv_stride, 4375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.v, 4385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HALVE(width), HALVE(height), tmp.uv_stride, work, 1); 4395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (tmp.a != NULL) { 4415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane(pic->a, prev_width, prev_height, pic->a_stride, 4425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.a, width, height, tmp.a_stride, work, 1); 4435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef WEBP_EXPERIMENTAL_FEATURES 4455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (tmp.u0 != NULL) { 4465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int s = IS_YUV_CSP(tmp.colorspace, WEBP_YUV422) ? 2 : 1; 4475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane( 4485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic->u0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, 4495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.u0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); 4505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane( 4515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic->v0, (prev_width + s / 2) / s, prev_height, pic->uv0_stride, 4525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.v0, (width + s / 2) / s, height, tmp.uv0_stride, work, 1); 4535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 4555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 4565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) work = (int32_t*)WebPSafeMalloc(2ULL * width * 4, sizeof(*work)); 4575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (work == NULL) { 4585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(&tmp); 4595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 4605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RescalePlane((const uint8_t*)pic->argb, prev_width, prev_height, 4635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic->argb_stride * 4, 4645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (uint8_t*)tmp.argb, width, height, 4655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.argb_stride * 4, 4665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) work, 4); 4675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(pic); 4695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(work); 4705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *pic = tmp; 4715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 4725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 4755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// WebPMemoryWriter: Write-to-memory 4765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void WebPMemoryWriterInit(WebPMemoryWriter* writer) { 4785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) writer->mem = NULL; 4795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) writer->size = 0; 4805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) writer->max_size = 0; 4815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 4825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 4835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPMemoryWrite(const uint8_t* data, size_t data_size, 4845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const WebPPicture* picture) { 4855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPMemoryWriter* const w = (WebPMemoryWriter*)picture->custom_ptr; 4865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint64_t next_size; 4875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (w == NULL) { 4885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 4895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 4905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) next_size = (uint64_t)w->size + data_size; 4915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (next_size > w->max_size) { 4925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t* new_mem; 4935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint64_t next_max_size = 2ULL * w->max_size; 4945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (next_max_size < next_size) next_max_size = next_size; 4955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (next_max_size < 8192ULL) next_max_size = 8192ULL; 4965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new_mem = (uint8_t*)WebPSafeMalloc(next_max_size, 1); 4975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (new_mem == NULL) { 4985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 4995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (w->size > 0) { 5015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(new_mem, w->mem, w->size); 5025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(w->mem); 5045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) w->mem = new_mem; 5055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // down-cast is ok, thanks to WebPSafeMalloc 5065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) w->max_size = (size_t)next_max_size; 5075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (data_size > 0) { 5095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(w->mem + w->size, data, data_size); 5105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) w->size += data_size; 5115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 5135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 5165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Detection of non-trivial transparency 5175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Returns true if alpha[] has non-0xff values. 5195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int CheckNonOpaque(const uint8_t* alpha, int width, int height, 5205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x_step, int y_step) { 5215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (alpha == NULL) return 0; 5225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (height-- > 0) { 5235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x; 5245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width * x_step; x += x_step) { 5255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (alpha[x] != 0xff) return 1; // TODO(skal): check 4/8 bytes at a time. 5265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) alpha += y_step; 5285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 5305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Checking for the presence of non-opaque alpha. 5335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureHasTransparency(const WebPPicture* picture) { 5345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture == NULL) return 0; 5355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!picture->use_argb) { 5365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return CheckNonOpaque(picture->a, picture->width, picture->height, 5375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1, picture->a_stride); 5385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 5395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x, y; 5405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t* argb = picture->argb; 5415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (argb == NULL) return 0; 5425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < picture->height; ++y) { 5435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < picture->width; ++x) { 5445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (argb[x] < 0xff000000u) return 1; // test any alpha values != 0xff 5455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) argb += picture->argb_stride; 5475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 5505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 5535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// RGB -> YUV conversion 5545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO: we can do better than simply 2x2 averaging on U/V samples. 5565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SUM4(ptr) ((ptr)[0] + (ptr)[step] + \ 5575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (ptr)[rgb_stride] + (ptr)[rgb_stride + step]) 5585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SUM2H(ptr) (2 * (ptr)[0] + 2 * (ptr)[step]) 5595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SUM2V(ptr) (2 * (ptr)[0] + 2 * (ptr)[rgb_stride]) 5605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SUM1(ptr) (4 * (ptr)[0]) 5615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define RGB_TO_UV(x, y, SUM) { \ 5625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int src = (2 * (step * (x) + (y) * rgb_stride)); \ 5635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int dst = (x) + (y) * picture->uv_stride; \ 5645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int r = SUM(r_ptr + src); \ 5655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int g = SUM(g_ptr + src); \ 5665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int b = SUM(b_ptr + src); \ 5675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->u[dst] = VP8RGBToU(r, g, b); \ 5685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->v[dst] = VP8RGBToV(r, g, b); \ 5695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define RGB_TO_UV0(x_in, x_out, y, SUM) { \ 5725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int src = (step * (x_in) + (y) * rgb_stride); \ 5735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int dst = (x_out) + (y) * picture->uv0_stride; \ 5745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int r = SUM(r_ptr + src); \ 5755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int g = SUM(g_ptr + src); \ 5765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int b = SUM(b_ptr + src); \ 5775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->u0[dst] = VP8RGBToU(r, g, b); \ 5785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->v0[dst] = VP8RGBToV(r, g, b); \ 5795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static void MakeGray(WebPPicture* const picture) { 5825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y; 5835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int uv_width = HALVE(picture->width); 5845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int uv_height = HALVE(picture->height); 5855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < uv_height; ++y) { 5865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(picture->u + y * picture->uv_stride, 128, uv_width); 5875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(picture->v + y * picture->uv_stride, 128, uv_width); 5885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 5895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 5905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int ImportYUVAFromRGBA(const uint8_t* const r_ptr, 5925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const g_ptr, 5935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const b_ptr, 5945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const a_ptr, 5955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int step, // bytes per pixel 5965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int rgb_stride, // bytes per scanline 5975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture* const picture) { 5985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const WebPEncCSP uv_csp = picture->colorspace & WEBP_CSP_UV_MASK; 5995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x, y; 6005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int width = picture->width; 6015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int height = picture->height; 6025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int has_alpha = CheckNonOpaque(a_ptr, width, height, step, rgb_stride); 6035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->colorspace = uv_csp; 6055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->use_argb = 0; 6065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (has_alpha) { 6075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->colorspace |= WEBP_CSP_ALPHA_BIT; 6085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPPictureAlloc(picture)) return 0; 6105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Import luma plane 6125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 6135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width; ++x) { 6145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int offset = step * x + y * rgb_stride; 6155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->y[x + y * picture->y_stride] = 6165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) VP8RGBToY(r_ptr[offset], g_ptr[offset], b_ptr[offset]); 6175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Downsample U/V plane 6215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (uv_csp != WEBP_YUV400) { 6225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < (height >> 1); ++y) { 6235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < (width >> 1); ++x) { 6245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV(x, y, SUM4); 6255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width & 1) { 6275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV(x, y, SUM2V); 6285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (height & 1) { 6315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < (width >> 1); ++x) { 6325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV(x, y, SUM2H); 6335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width & 1) { 6355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV(x, y, SUM1); 6365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef WEBP_EXPERIMENTAL_FEATURES 6405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Store original U/V samples too 6415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (uv_csp == WEBP_YUV422) { 6425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 6435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < (width >> 1); ++x) { 6445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV0(2 * x, x, y, SUM2H); 6455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (width & 1) { 6475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV0(2 * x, x, y, SUM1); 6485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else if (uv_csp == WEBP_YUV444) { 6515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 6525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width; ++x) { 6535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RGB_TO_UV0(x, x, y, SUM1); 6545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 6585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 6595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MakeGray(picture); 6605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (has_alpha) { 6635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert(step >= 4); 6645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 6655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width; ++x) { 6665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->a[x + y * picture->a_stride] = 6675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) a_ptr[step * x + y * rgb_stride]; 6685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 6725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 6735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int Import(WebPPicture* const picture, 6755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const rgb, int rgb_stride, 6765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int step, int swap_rb, int import_alpha) { 6775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const r_ptr = rgb + (swap_rb ? 2 : 0); 6785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const g_ptr = rgb + 1; 6795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const b_ptr = rgb + (swap_rb ? 0 : 2); 6805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const a_ptr = import_alpha ? rgb + 3 : NULL; 6815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int width = picture->width; 6825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int height = picture->height; 6835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!picture->use_argb) { 6855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ImportYUVAFromRGBA(r_ptr, g_ptr, b_ptr, a_ptr, step, rgb_stride, 6865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture); 6875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (import_alpha) { 6895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->colorspace |= WEBP_CSP_ALPHA_BIT; 6905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 6915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->colorspace &= ~WEBP_CSP_ALPHA_BIT; 6925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 6935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPPictureAlloc(picture)) return 0; 6945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!import_alpha) { 6965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x, y; 6975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 6985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width; ++x) { 6995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int offset = step * x + y * rgb_stride; 7005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint32_t argb = 7015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 0xff000000u | 7025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (r_ptr[offset] << 16) | 7035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (g_ptr[offset] << 8) | 7045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (b_ptr[offset]); 7055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb[x + y * picture->argb_stride] = argb; 7065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 7095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x, y; 7105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) assert(step >= 4); 7115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 7125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width; ++x) { 7135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int offset = step * x + y * rgb_stride; 714eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch const uint32_t argb = ((uint32_t)a_ptr[offset] << 24) | 7155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (r_ptr[offset] << 16) | 7165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (g_ptr[offset] << 8) | 7175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (b_ptr[offset]); 7185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->argb[x + y * picture->argb_stride] = argb; 7195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 7235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef SUM4 7255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef SUM2V 7265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef SUM2H 7275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef SUM1 7285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef RGB_TO_UV 7295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureImportRGB(WebPPicture* picture, 7315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* rgb, int rgb_stride) { 7325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Import(picture, rgb, rgb_stride, 3, 0, 0); 7335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureImportBGR(WebPPicture* picture, 7365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* rgb, int rgb_stride) { 7375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Import(picture, rgb, rgb_stride, 3, 1, 0); 7385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureImportRGBA(WebPPicture* picture, 7415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* rgba, int rgba_stride) { 7425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Import(picture, rgba, rgba_stride, 4, 0, 1); 7435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureImportBGRA(WebPPicture* picture, 7465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* rgba, int rgba_stride) { 7475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Import(picture, rgba, rgba_stride, 4, 1, 1); 7485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureImportRGBX(WebPPicture* picture, 7515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* rgba, int rgba_stride) { 7525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Import(picture, rgba, rgba_stride, 4, 0, 0); 7535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureImportBGRX(WebPPicture* picture, 7565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* rgba, int rgba_stride) { 7575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Import(picture, rgba, rgba_stride, 4, 1, 0); 7585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 7595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 7615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Automatic YUV <-> ARGB conversions. 7625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureYUVAToARGB(WebPPicture* picture) { 7645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture == NULL) return 0; 7655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture->memory_ == NULL || picture->y == NULL || 7665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) picture->u == NULL || picture->v == NULL) { 7675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); 7685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((picture->colorspace & WEBP_CSP_ALPHA_BIT) && picture->a == NULL) { 7705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); 7715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((picture->colorspace & WEBP_CSP_UV_MASK) != WEBP_YUV420) { 7735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return WebPEncodingSetError(picture, VP8_ENC_ERROR_INVALID_CONFIGURATION); 7745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 7755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocate a new argb buffer (discarding the previous one). 7765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!PictureAllocARGB(picture)) return 0; 7775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Convert 7795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 7805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y; 7815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int width = picture->width; 7825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int height = picture->height; 7835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int argb_stride = 4 * picture->argb_stride; 7845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t* dst = (uint8_t*)picture->argb; 7855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t *cur_u = picture->u, *cur_v = picture->v, *cur_y = picture->y; 7865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPUpsampleLinePairFunc upsample = WebPGetLinePairConverter(ALPHA_IS_LAST); 7875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 7885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // First row, with replicated top samples. 7895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) upsample(NULL, cur_y, cur_u, cur_v, cur_u, cur_v, NULL, dst, width); 7905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cur_y += picture->y_stride; 7915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst += argb_stride; 7925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Center rows. 7935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 1; y + 1 < height; y += 2) { 7945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const top_u = cur_u; 7955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const top_v = cur_v; 7965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cur_u += picture->uv_stride; 7975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cur_v += picture->uv_stride; 7985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) upsample(cur_y, cur_y + picture->y_stride, top_u, top_v, cur_u, cur_v, 7995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst, dst + argb_stride, width); 8005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cur_y += 2 * picture->y_stride; 8015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dst += 2 * argb_stride; 8025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Last row (if needed), with replicated bottom samples. 8045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (height > 1 && !(height & 1)) { 8055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) upsample(cur_y, NULL, cur_u, cur_v, cur_u, cur_v, dst, NULL, width); 8065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Insert alpha values if needed, in replacement for the default 0xff ones. 8085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture->colorspace & WEBP_CSP_ALPHA_BIT) { 8095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < height; ++y) { 8102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uint32_t* const argb_dst = picture->argb + y * picture->argb_stride; 8115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const src = picture->a + y * picture->a_stride; 8125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x; 8135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < width; ++x) { 814eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch argb_dst[x] = (argb_dst[x] & 0x00ffffffu) | ((uint32_t)src[x] << 24); 8155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 8205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int WebPPictureARGBToYUVA(WebPPicture* picture, WebPEncCSP colorspace) { 8235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture == NULL) return 0; 8245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (picture->argb == NULL) { 8255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return WebPEncodingSetError(picture, VP8_ENC_ERROR_NULL_PARAMETER); 8265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 8275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const argb = (const uint8_t*)picture->argb; 8285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const r = ALPHA_IS_LAST ? argb + 2 : argb + 1; 8295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const g = ALPHA_IS_LAST ? argb + 1 : argb + 2; 8305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const b = ALPHA_IS_LAST ? argb + 0 : argb + 3; 8315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* const a = ALPHA_IS_LAST ? argb + 3 : argb + 0; 8325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We work on a tmp copy of 'picture', because ImportYUVAFromRGBA() 8335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // would be calling WebPPictureFree(picture) otherwise. 8345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture tmp = *picture; 8355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PictureResetARGB(&tmp); // reset ARGB buffer so that it's not free()'d. 8365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.use_argb = 0; 8375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.colorspace = colorspace & WEBP_CSP_UV_MASK; 8385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!ImportYUVAFromRGBA(r, g, b, a, 4, 4 * picture->argb_stride, &tmp)) { 8395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return WebPEncodingSetError(picture, VP8_ENC_ERROR_OUT_OF_MEMORY); 8405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Copy back the YUV specs into 'picture'. 8425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.argb = picture->argb; 8435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.argb_stride = picture->argb_stride; 8445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) tmp.memory_argb_ = picture->memory_argb_; 8455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *picture = tmp; 8465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 8485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 8515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Helper: clean up fully transparent area to help compressibility. 8525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SIZE 8 8545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SIZE2 (SIZE / 2) 8555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static int is_transparent_area(const uint8_t* ptr, int stride, int size) { 8565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y, x; 8575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < size; ++y) { 8585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < size; ++x) { 8595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (ptr[x]) { 8605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 8615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr += stride; 8645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 8665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static WEBP_INLINE void flatten(uint8_t* ptr, int v, int stride, int size) { 8695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int y; 8705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < size; ++y) { 8715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(ptr, v, size); 8725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ptr += stride; 8735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 8745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 8755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void WebPCleanupTransparentArea(WebPPicture* pic) { 8775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int x, y, w, h; 8785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint8_t* a_ptr; 8795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int values[3] = { 0 }; 8805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (pic == NULL) return; 8825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) a_ptr = pic->a; 8845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (a_ptr == NULL) return; // nothing to do 8855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 8865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) w = pic->width / SIZE; 8875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) h = pic->height / SIZE; 8885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (y = 0; y < h; ++y) { 8895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int need_reset = 1; 8905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (x = 0; x < w; ++x) { 8915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int off_a = (y * pic->a_stride + x) * SIZE; 8925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int off_y = (y * pic->y_stride + x) * SIZE; 8935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int off_uv = (y * pic->uv_stride + x) * SIZE2; 8945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (is_transparent_area(a_ptr + off_a, pic->a_stride, SIZE)) { 8955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (need_reset) { 8965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) values[0] = pic->y[off_y]; 8975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) values[1] = pic->u[off_uv]; 8985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) values[2] = pic->v[off_uv]; 8995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_reset = 0; 9005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) flatten(pic->y + off_y, values[0], pic->y_stride, SIZE); 9025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) flatten(pic->u + off_uv, values[1], pic->uv_stride, SIZE2); 9035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) flatten(pic->v + off_uv, values[2], pic->uv_stride, SIZE2); 9045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 9055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_reset = 1; 9065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // ignore the left-overs on right/bottom 9095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 9115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef SIZE 9135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef SIZE2 9145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//------------------------------------------------------------------------------ 9162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// local-min distortion 9172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 9182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// For every pixel in the *reference* picture, we search for the local best 9192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// match in the compressed image. This is not a symmetrical measure. 9202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 9212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// search radius. Shouldn't be too large. 9222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#define RADIUS 2 9232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 9242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static float AccumulateLSIM(const uint8_t* src, int src_stride, 9252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const uint8_t* ref, int ref_stride, 9262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int w, int h) { 9272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int x, y; 9282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) double total_sse = 0.; 9292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (y = 0; y < h; ++y) { 9302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int y_0 = (y - RADIUS < 0) ? 0 : y - RADIUS; 9312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int y_1 = (y + RADIUS + 1 >= h) ? h : y + RADIUS + 1; 9322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (x = 0; x < w; ++x) { 9332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int x_0 = (x - RADIUS < 0) ? 0 : x - RADIUS; 9342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const int x_1 = (x + RADIUS + 1 >= w) ? w : x + RADIUS + 1; 9352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) double best_sse = 255. * 255.; 9362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const double value = (double)ref[y * ref_stride + x]; 9372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int i, j; 9382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (j = y_0; j < y_1; ++j) { 9392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const uint8_t* s = src + j * src_stride; 9402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (i = x_0; i < x_1; ++i) { 9412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const double sse = (double)(s[i] - value) * (s[i] - value); 9422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (sse < best_sse) best_sse = sse; 9432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 9442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 9452a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) total_sse += best_sse; 9462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 9472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 9482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return (float)total_sse; 9492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 9502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#undef RADIUS 9515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 9535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Distortion 9545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Max value returned in case of exact similarity. 9565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const double kMinDistortion_dB = 99.; 9572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static float GetPSNR(const double v) { 9582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return (float)((v > 0.) ? -4.3429448 * log(v / (255 * 255.)) 9592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : kMinDistortion_dB); 9602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 9615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)int WebPPictureDistortion(const WebPPicture* src, const WebPPicture* ref, 9635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int type, float result[5]) { 9645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DistoStats stats[5]; 9655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int has_alpha; 9662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int uv_w, uv_h; 9675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (src == NULL || ref == NULL || 9692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->width != ref->width || src->height != ref->height || 9702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->y == NULL || ref->y == NULL || 9712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->u == NULL || ref->u == NULL || 9722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->v == NULL || ref->v == NULL || 9735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result == NULL) { 9745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 9755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(skal): provide distortion for ARGB too. 9772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (src->use_argb == 1 || src->use_argb != ref->use_argb) { 9785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 9795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) has_alpha = !!(src->colorspace & WEBP_CSP_ALPHA_BIT); 9822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_alpha != !!(ref->colorspace & WEBP_CSP_ALPHA_BIT) || 9832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) (has_alpha && (src->a == NULL || ref->a == NULL))) { 9845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 9855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 9865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 9875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(stats, 0, sizeof(stats)); 9882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 9892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uv_w = HALVE(src->width); 9902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uv_h = HALVE(src->height); 9912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (type >= 2) { 9922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) float sse[4]; 9932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) sse[0] = AccumulateLSIM(src->y, src->y_stride, 9942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->y, ref->y_stride, src->width, src->height); 9952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) sse[1] = AccumulateLSIM(src->u, src->uv_stride, 9962a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->u, ref->uv_stride, uv_w, uv_h); 9972a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) sse[2] = AccumulateLSIM(src->v, src->uv_stride, 9982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->v, ref->uv_stride, uv_w, uv_h); 9992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) sse[3] = has_alpha ? AccumulateLSIM(src->a, src->a_stride, 10002a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->a, ref->a_stride, 10012a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->width, src->height) 10022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : 0.f; 10032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[0] = GetPSNR(sse[0] / (src->width * src->height)); 10042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[1] = GetPSNR(sse[1] / (uv_w * uv_h)); 10052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[2] = GetPSNR(sse[2] / (uv_w * uv_h)); 10062a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[3] = GetPSNR(sse[3] / (src->width * src->height)); 10072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) { 10082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) double total_sse = sse[0] + sse[1] + sse[2]; 10092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int total_pixels = src->width * src->height + 2 * uv_w * uv_h; 10102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_alpha) { 10112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) total_pixels += src->width * src->height; 10122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) total_sse += sse[3]; 10132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 10142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[4] = GetPSNR(total_sse / total_pixels); 10152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 10162a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } else { 10172a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) int c; 10182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VP8SSIMAccumulatePlane(src->y, src->y_stride, 10192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->y, ref->y_stride, 10202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->width, src->height, &stats[0]); 10212a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VP8SSIMAccumulatePlane(src->u, src->uv_stride, 10222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->u, ref->uv_stride, 10232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uv_w, uv_h, &stats[1]); 10242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VP8SSIMAccumulatePlane(src->v, src->uv_stride, 10252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->v, ref->uv_stride, 10262a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) uv_w, uv_h, &stats[2]); 10272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (has_alpha) { 10282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) VP8SSIMAccumulatePlane(src->a, src->a_stride, 10292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ref->a, ref->a_stride, 10302a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) src->width, src->height, &stats[3]); 10312a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 10322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) for (c = 0; c <= 4; ++c) { 10332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (type == 1) { 10342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const double v = VP8SSIMGet(&stats[c]); 10352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[c] = (float)((v < 1.) ? -10.0 * log10(1. - v) 10362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) : kMinDistortion_dB); 10372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } else { 10382a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const double v = VP8SSIMGetSquaredError(&stats[c]); 10392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) result[c] = GetPSNR(v); 10402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 10412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Accumulate forward 10422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (c < 4) VP8SSIMAddStats(&stats[c], &stats[4]); 10435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 10445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 10455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 10465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 10495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Simplest high-level calls: 10505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef int (*Importer)(WebPPicture* const, const uint8_t* const, int); 10525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static size_t Encode(const uint8_t* rgba, int width, int height, int stride, 10545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Importer import, float quality_factor, int lossless, 10555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t** output) { 10565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPicture pic; 10575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPConfig config; 10585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPMemoryWriter wrt; 10595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int ok; 10605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!WebPConfigPreset(&config, WEBP_PRESET_DEFAULT, quality_factor) || 10625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) !WebPPictureInit(&pic)) { 10635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; // shouldn't happen, except if system installation is broken 10645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 10655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) config.lossless = !!lossless; 10675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic.use_argb = !!lossless; 10685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic.width = width; 10695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic.height = height; 10705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic.writer = WebPMemoryWrite; 10715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pic.custom_ptr = &wrt; 10725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPMemoryWriterInit(&wrt); 10735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ok = import(&pic, rgba, stride) && WebPEncode(&config, &pic); 10755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) WebPPictureFree(&pic); 10765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!ok) { 10775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(wrt.mem); 10785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *output = NULL; 10795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 0; 10805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 10815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *output = wrt.mem; 10825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return wrt.size; 10835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define ENCODE_FUNC(NAME, IMPORTER) \ 10865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t NAME(const uint8_t* in, int w, int h, int bps, float q, \ 10875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint8_t** out) { \ 10885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Encode(in, w, h, bps, IMPORTER, q, 0, out); \ 10895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 10905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ENCODE_FUNC(WebPEncodeRGB, WebPPictureImportRGB); 10925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ENCODE_FUNC(WebPEncodeBGR, WebPPictureImportBGR); 10935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ENCODE_FUNC(WebPEncodeRGBA, WebPPictureImportRGBA); 10945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ENCODE_FUNC(WebPEncodeBGRA, WebPPictureImportBGRA); 10955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef ENCODE_FUNC 10975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 10985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOSSLESS_DEFAULT_QUALITY 70. 10995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define LOSSLESS_ENCODE_FUNC(NAME, IMPORTER) \ 11005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t NAME(const uint8_t* in, int w, int h, int bps, uint8_t** out) { \ 11015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Encode(in, w, h, bps, IMPORTER, LOSSLESS_DEFAULT_QUALITY, 1, out); \ 11025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 11035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGB, WebPPictureImportRGB); 11055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGR, WebPPictureImportBGR); 11065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessRGBA, WebPPictureImportRGBA); 11075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)LOSSLESS_ENCODE_FUNC(WebPEncodeLosslessBGRA, WebPPictureImportBGRA); 11085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#undef LOSSLESS_ENCODE_FUNC 11105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 11125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__cplusplus) || defined(c_plusplus) 11145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // extern "C" 11155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 1116