1474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/* 2474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 4474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * Use of this source code is governed by a BSD-style license 5474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * that can be found in the LICENSE file in the root of the source 6474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * tree. An additional intellectual property rights grant can be found 7474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * in the file PATENTS. All contributing project authors may 8474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * be found in the AUTHORS file in the root of the source tree. 9474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org */ 10474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 11474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 12474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 13474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 14474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * Module Title : scale.c 15474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 16474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * Description : Image scaling functions. 17474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 18474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ***************************************************************************/ 19474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 20474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 21474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org* Header Files 22474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org****************************************************************************/ 236fefe538d859300e7febe78271828198c10f1b52fgalligan@chromium.org#include "./vpx_scale_rtcd.h" 24474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org#include "vpx_mem/vpx_mem.h" 25474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org#include "vpx_scale/yv12config.h" 26474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 27ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.orgtypedef struct { 28ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int expanded_frame_width; 29ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int expanded_frame_height; 30474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 31ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int HScale; 32ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int HRatio; 33ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int VScale; 34ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int VRatio; 35474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 36ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org YV12_BUFFER_CONFIG *src_yuv_config; 37ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org YV12_BUFFER_CONFIG *dst_yuv_config; 38474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 39474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} SCALE_VARS; 40474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 41474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 42474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 43474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * ROUTINE : scale1d_2t1_i 44474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 45474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * INPUTS : const unsigned char *source : Pointer to data to be scaled. 46474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int source_step : Number of pixels to step on in source. 47474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_scale : Scale for source (UNUSED). 48474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_length : Length of source (UNUSED). 49474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char *dest : Pointer to output data array. 50474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int dest_step : Number of pixels to step on in destination. 51474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_scale : Scale for destination (UNUSED). 52474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_length : Length of destination. 53474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 54474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * OUTPUTS : None. 55474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 56474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * RETURNS : void 57474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 58474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * FUNCTION : Performs 2-to-1 interpolated scaling. 59474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 60474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * SPECIAL NOTES : None. 61474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 62474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ****************************************************************************/ 63474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgstatic 64474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid scale1d_2t1_i 65474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org( 66ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org const unsigned char *source, 67ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int source_step, 68ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_scale, 69ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_length, 70ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *dest, 71ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dest_step, 72ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_scale, 73ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_length 74ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org) { 75ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int i, j; 76ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int temp; 77ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int source_pitch = source_step; 78ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) source_length; 79ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) source_scale; 80ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) dest_scale; 81ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 82ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_step *= 2; 83ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest[0] = source[0]; 84ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 85ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = dest_step, j = source_step; i < dest_length * dest_step; i += dest_step, j += source_step) { 86ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp = 8; 87ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp += 3 * source[j - source_pitch]; 88ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp += 10 * source[j]; 89ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp += 3 * source[j + source_pitch]; 90ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp >>= 4; 91ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest[i] = (char)(temp); 92ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 93474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 94474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 95474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 96474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 97474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * ROUTINE : scale1d_2t1_ps 98474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 99474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * INPUTS : const unsigned char *source : Pointer to data to be scaled. 100474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int source_step : Number of pixels to step on in source. 101474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_scale : Scale for source (UNUSED). 102474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_length : Length of source (UNUSED). 103474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char *dest : Pointer to output data array. 104474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int dest_step : Number of pixels to step on in destination. 105474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_scale : Scale for destination (UNUSED). 106474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_length : Length of destination. 107474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 108474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * OUTPUTS : None. 109474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 110474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * RETURNS : void 111474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 112474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * FUNCTION : Performs 2-to-1 point subsampled scaling. 113474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 114474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * SPECIAL NOTES : None. 115474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 116474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ****************************************************************************/ 117474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgstatic 118474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid scale1d_2t1_ps 119474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org( 120ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org const unsigned char *source, 121ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int source_step, 122ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_scale, 123ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_length, 124ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *dest, 125ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dest_step, 126ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_scale, 127ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_length 128ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org) { 129ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int i, j; 130ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 131ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) source_length; 132ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) source_scale; 133ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) dest_scale; 134ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 135ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_step *= 2; 136ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org j = 0; 137ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 138ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 0; i < dest_length * dest_step; i += dest_step, j += source_step) 139ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest[i] = source[j]; 140474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 141474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 142474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 143474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * ROUTINE : scale1d_c 144474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 145474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * INPUTS : const unsigned char *source : Pointer to data to be scaled. 146474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int source_step : Number of pixels to step on in source. 147474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_scale : Scale for source. 148474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_length : Length of source (UNUSED). 149474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char *dest : Pointer to output data array. 150474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int dest_step : Number of pixels to step on in destination. 151474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_scale : Scale for destination. 152474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_length : Length of destination. 153474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 154474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * OUTPUTS : None. 155474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 156474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * RETURNS : void 157474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 158474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * FUNCTION : Performs linear interpolation in one dimension. 159474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 160474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * SPECIAL NOTES : None. 161474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 162474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ****************************************************************************/ 163474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgstatic 164474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid scale1d_c 165474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org( 166ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org const unsigned char *source, 167ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int source_step, 168ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_scale, 169ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_length, 170ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *dest, 171ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dest_step, 172ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_scale, 173ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_length 174ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org) { 175ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int i; 176ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int round_value = dest_scale / 2; 177ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int left_modifier = dest_scale; 178ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int right_modifier = 0; 179ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char left_pixel = *source; 180ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char right_pixel = *(source + source_step); 181ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 182ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (void) source_length; 183ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 184ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* These asserts are needed if there are boundary issues... */ 185ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /*assert ( dest_scale > source_scale );*/ 186ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /*assert ( (source_length-1) * dest_scale >= (dest_length-1) * source_scale );*/ 187ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 188ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 0; i < dest_length * dest_step; i += dest_step) { 189ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest[i] = (char)((left_modifier * left_pixel + right_modifier * right_pixel + round_value) / dest_scale); 190ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 191ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org right_modifier += source_scale; 192ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 193ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org while (right_modifier > dest_scale) { 194ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org right_modifier -= dest_scale; 195ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source += source_step; 196ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org left_pixel = *source; 197ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org right_pixel = *(source + source_step); 198474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 199ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 200ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org left_modifier = dest_scale - right_modifier; 201ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 202474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 203474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 204474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 205474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 206474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * ROUTINE : Scale2D 207474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 208474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * INPUTS : const unsigned char *source : Pointer to data to be scaled. 209474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int source_pitch : Stride of source image. 210474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_width : Width of input image. 211474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int source_height : Height of input image. 212474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char *dest : Pointer to output data array. 213474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * int dest_pitch : Stride of destination image. 214474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_width : Width of destination image. 215474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int dest_height : Height of destination image. 216474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char *temp_area : Pointer to temp work area. 217474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char temp_area_height : Height of temp work area. 218474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int hscale : Horizontal scale factor numerator. 219474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int hratio : Horizontal scale factor denominator. 220474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int vscale : Vertical scale factor numerator. 221474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int vratio : Vertical scale factor denominator. 222474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int interlaced : Interlace flag. 223474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 224474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * OUTPUTS : None. 225474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 226474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * RETURNS : void 227474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 228474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * FUNCTION : Performs 2-tap linear interpolation in two dimensions. 229474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 230474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * SPECIAL NOTES : Expansion is performed one band at a time to help with 231474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * caching. 232474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 233474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ****************************************************************************/ 234474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgstatic 235474eb7536515fb785e925cc9375d22817c416851hclam@chromium.orgvoid Scale2D 236474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org( 237ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /*const*/ 238ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *source, 239ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int source_pitch, 240ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_width, 241ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int source_height, 242ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *dest, 243ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dest_pitch, 244ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_width, 245ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int dest_height, 246ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *temp_area, 247ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char temp_area_height, 248ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int hscale, 249ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int hratio, 250ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int vscale, 251ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int vratio, 252ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int interlaced 253ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org) { 254ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /*unsigned*/ 255ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int i, j, k; 256ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int bands; 257ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dest_band_height; 258ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int source_band_height; 259ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 260ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org typedef void (*Scale1D)(const unsigned char * source, int source_step, unsigned int source_scale, unsigned int source_length, 261ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char * dest, int dest_step, unsigned int dest_scale, unsigned int dest_length); 262ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 263ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1D Scale1Dv = scale1d_c; 264ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1D Scale1Dh = scale1d_c; 265ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 266ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org void (*horiz_line_scale)(const unsigned char *, unsigned int, unsigned char *, unsigned int) = NULL; 267ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org void (*vert_band_scale)(unsigned char *, unsigned int, unsigned char *, unsigned int, unsigned int) = NULL; 268ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 269ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int ratio_scalable = 1; 270ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int interpolation = 0; 271ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 272ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *source_base; /* = (unsigned char *) ((source_pitch >= 0) ? source : (source + ((source_height-1) * source_pitch))); */ 273ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *line_src; 274ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 275ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 276ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_base = (unsigned char *)source; 277ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 278ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (source_pitch < 0) { 279ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int offset; 280ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 281ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org offset = (source_height - 1); 282ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org offset *= source_pitch; 283ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 284ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_base += offset; 285ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 286ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 287ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* find out the ratio for each direction */ 288ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org switch (hratio * 10 / hscale) { 289474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org case 8: 290ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* 4-5 Scale in Width direction */ 291ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org horiz_line_scale = vp8_horizontal_line_5_4_scale; 292ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 293474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org case 6: 294ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* 3-5 Scale in Width direction */ 295ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org horiz_line_scale = vp8_horizontal_line_5_3_scale; 296ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 297474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org case 5: 298ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* 1-2 Scale in Width direction */ 299ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org horiz_line_scale = vp8_horizontal_line_2_1_scale; 300ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 301474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org default: 302ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* The ratio is not acceptable now */ 303ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* throw("The ratio is not acceptable for now!"); */ 304ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org ratio_scalable = 0; 305ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 306ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 307474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 308ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org switch (vratio * 10 / vscale) { 309474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org case 8: 310ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* 4-5 Scale in vertical direction */ 311ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org vert_band_scale = vp8_vertical_band_5_4_scale; 312ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_band_height = 5; 313ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest_band_height = 4; 314ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 315474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org case 6: 316ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* 3-5 Scale in vertical direction */ 317ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org vert_band_scale = vp8_vertical_band_5_3_scale; 318ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_band_height = 5; 319ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest_band_height = 3; 320ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 321474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org case 5: 322ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* 1-2 Scale in vertical direction */ 323474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 324ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (interlaced) { 325ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* if the content is interlaced, point sampling is used */ 326ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org vert_band_scale = vp8_vertical_band_2_1_scale; 327ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } else { 328474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 329ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org interpolation = 1; 330ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* if the content is progressive, interplo */ 331ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org vert_band_scale = vp8_vertical_band_2_1_scale_i; 332474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 333ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 334474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 335ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_band_height = 2; 336ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest_band_height = 1; 337ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 338474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org default: 339ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* The ratio is not acceptable now */ 340ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* throw("The ratio is not acceptable for now!"); */ 341ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org ratio_scalable = 0; 342ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org break; 343ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 344ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 345ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (ratio_scalable) { 346ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (source_height == dest_height) { 347ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* for each band of the image */ 348ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (k = 0; k < (int)dest_height; k++) { 349ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org horiz_line_scale(source, source_width, dest, dest_width); 350ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source += source_pitch; 351ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest += dest_pitch; 352ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 353ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 354ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org return; 355474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 356474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 357ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (interpolation) { 358ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (source < source_base) 359ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source = source_base; 360ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 361ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org horiz_line_scale(source, source_width, temp_area, dest_width); 362474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 363474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 364ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (k = 0; k < (int)(dest_height + dest_band_height - 1) / dest_band_height; k++) { 365ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* scale one band horizontally */ 366ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 0; i < source_band_height; i++) { 367ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* Trap case where we could read off the base of the source buffer */ 368474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 369ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org line_src = (unsigned char *)source + i * source_pitch; 370474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 371ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (line_src < source_base) 372ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org line_src = source_base; 373ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 374ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org horiz_line_scale(line_src, source_width, 375ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp_area + (i + 1)*dest_pitch, dest_width); 376ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 377ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 378ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* Vertical scaling is in place */ 379ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org vert_band_scale(temp_area + dest_pitch, dest_pitch, dest, dest_pitch, dest_width); 380474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 381ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (interpolation) 382ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org vpx_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_width); 383ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 384ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* Next band... */ 385ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source += (unsigned long) source_band_height * source_pitch; 386ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest += (unsigned long) dest_band_height * dest_pitch; 387474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 388ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 389ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org return; 390ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 391ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 392ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (hscale == 2 && hratio == 1) 393ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dh = scale1d_2t1_ps; 394ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 395ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (vscale == 2 && vratio == 1) { 396ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (interlaced) 397ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dv = scale1d_2t1_ps; 398474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org else 399ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dv = scale1d_2t1_i; 400ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 401ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 402ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (source_height == dest_height) { 403ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* for each band of the image */ 404ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (k = 0; k < (int)dest_height; k++) { 405ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dh(source, 1, hscale, source_width + 1, dest, 1, hratio, dest_width); 406ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source += source_pitch; 407ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest += dest_pitch; 408474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 409474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 410ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org return; 411ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 412ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 413ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dest_height > source_height) { 414ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest_band_height = temp_area_height - 1; 415ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_band_height = dest_band_height * source_height / dest_height; 416ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } else { 417ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source_band_height = temp_area_height - 1; 418ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest_band_height = source_band_height * vratio / vscale; 419ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 420474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 421ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* first row needs to be done so that we can stay one row ahead for vertical zoom */ 422ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dh(source, 1, hscale, source_width + 1, temp_area, 1, hratio, dest_width); 423474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 424ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* for each band of the image */ 425ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org bands = (dest_height + dest_band_height - 1) / dest_band_height; 426ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 427ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (k = 0; k < bands; k++) { 428ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* scale one band horizontally */ 429ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 1; i < source_band_height + 1; i++) { 430ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (k * source_band_height + i < (int) source_height) { 431ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dh(source + i * source_pitch, 1, hscale, source_width + 1, 432ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp_area + i * dest_pitch, 1, hratio, dest_width); 433ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } else { /* Duplicate the last row */ 434474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org /* copy temp_area row 0 over from last row in the past */ 435d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memcpy(temp_area + i * dest_pitch, temp_area + (i - 1)*dest_pitch, dest_pitch); 436ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 437ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 438474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 439ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* scale one band vertically */ 440ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (j = 0; j < (int)dest_width; j++) { 441ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale1Dv(&temp_area[j], dest_pitch, vscale, source_band_height + 1, 442ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org &dest[j], dest_pitch, vratio, dest_band_height); 443474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org } 444ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 445ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* copy temp_area row 0 over from last row in the past */ 446d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_pitch); 447ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 448ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* move to the next band */ 449ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org source += source_band_height * source_pitch; 450ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org dest += dest_band_height * dest_pitch; 451ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org } 452474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 453474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org 454474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org/**************************************************************************** 455474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 456d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org * ROUTINE : vpx_scale_frame 457474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 458474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * INPUTS : YV12_BUFFER_CONFIG *src : Pointer to frame to be scaled. 459474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * YV12_BUFFER_CONFIG *dst : Pointer to buffer to hold scaled frame. 460474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char *temp_area : Pointer to temp work area. 461474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned char temp_area_height : Height of temp work area. 462474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int hscale : Horizontal scale factor numerator. 463474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int hratio : Horizontal scale factor denominator. 464474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int vscale : Vertical scale factor numerator. 465474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int vratio : Vertical scale factor denominator. 466474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * unsigned int interlaced : Interlace flag. 467474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 468474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * OUTPUTS : None. 469474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 470474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * RETURNS : void 471474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 472474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * FUNCTION : Performs 2-tap linear interpolation in two dimensions. 473474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 474474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * SPECIAL NOTES : Expansion is performed one band at a time to help with 475474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * caching. 476474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org * 477474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org ****************************************************************************/ 478d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.orgvoid vpx_scale_frame 479474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org( 480ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org YV12_BUFFER_CONFIG *src, 481ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org YV12_BUFFER_CONFIG *dst, 482ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char *temp_area, 483ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned char temp_height, 484ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int hscale, 485ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int hratio, 486ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int vscale, 487ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int vratio, 488ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org unsigned int interlaced 489ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org) { 490ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int i; 491ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dw = (hscale - 1 + src->y_width * hratio) / hscale; 492ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org int dh = (vscale - 1 + src->y_height * vratio) / vscale; 493ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 494ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org /* call our internal scaling routines!! */ 495ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale2D((unsigned char *) src->y_buffer, src->y_stride, src->y_width, src->y_height, 496ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (unsigned char *) dst->y_buffer, dst->y_stride, dw, dh, 497ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced); 498ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 499ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dw < (int)dst->y_width) 500ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 0; i < dh; i++) 501d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memset(dst->y_buffer + i * dst->y_stride + dw - 1, dst->y_buffer[i * dst->y_stride + dw - 2], dst->y_width - dw + 1); 502ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 503ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dh < (int)dst->y_height) 504ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = dh - 1; i < (int)dst->y_height; i++) 505d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memcpy(dst->y_buffer + i * dst->y_stride, dst->y_buffer + (dh - 2) * dst->y_stride, dst->y_width + 1); 506ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 507ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale2D((unsigned char *) src->u_buffer, src->uv_stride, src->uv_width, src->uv_height, 508ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (unsigned char *) dst->u_buffer, dst->uv_stride, dw / 2, dh / 2, 509ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced); 510ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 511ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dw / 2 < (int)dst->uv_width) 512ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 0; i < dst->uv_height; i++) 513d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memset(dst->u_buffer + i * dst->uv_stride + dw / 2 - 1, dst->u_buffer[i * dst->uv_stride + dw / 2 - 2], dst->uv_width - dw / 2 + 1); 514ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 515ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dh / 2 < (int)dst->uv_height) 516ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = dh / 2 - 1; i < (int)dst->y_height / 2; i++) 517d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memcpy(dst->u_buffer + i * dst->uv_stride, dst->u_buffer + (dh / 2 - 2)*dst->uv_stride, dst->uv_width); 518ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 519ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org Scale2D((unsigned char *) src->v_buffer, src->uv_stride, src->uv_width, src->uv_height, 520ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org (unsigned char *) dst->v_buffer, dst->uv_stride, dw / 2, dh / 2, 521ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced); 522ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 523ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dw / 2 < (int)dst->uv_width) 524ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = 0; i < dst->uv_height; i++) 525d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memset(dst->v_buffer + i * dst->uv_stride + dw / 2 - 1, dst->v_buffer[i * dst->uv_stride + dw / 2 - 2], dst->uv_width - dw / 2 + 1); 526ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org 527ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org if (dh / 2 < (int) dst->uv_height) 528ed759d81a39febed3a8a395386639d54307504aagrunell@chromium.org for (i = dh / 2 - 1; i < (int)dst->y_height / 2; i++) 529d348b8d765c019ee7250075d663a83db00c65c08tomfinegan@chromium.org vpx_memcpy(dst->v_buffer + i * dst->uv_stride, dst->v_buffer + (dh / 2 - 2)*dst->uv_stride, dst->uv_width); 530474eb7536515fb785e925cc9375d22817c416851hclam@chromium.org} 531