1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if !defined(_FX_JPEG_TURBO_) 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * jdmerge.c 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Copyright (C) 1994-1996, Thomas G. Lane. 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file is part of the Independent JPEG Group's software. 7ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * For conditions of distribution and use, see the accompanying README file. 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file contains code for merged upsampling/color conversion. 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file combines functions from jdsample.c and jdcolor.c; 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * read those files first to understand what's going on. 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * When the chroma components are to be upsampled by simple replication 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * (ie, box filtering), we can save some work in color conversion by 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * calculating all the output pixels corresponding to a pair of chroma 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * samples at one time. In the conversion equations 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * R = Y + K1 * Cr 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * G = Y + K2 * Cb + K3 * Cr 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * B = Y + K4 * Cb 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * only the Y term varies among the group of pixels corresponding to a pair 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * of chroma samples, so the rest of the terms can be calculated just once. 23ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * At typical sampling ratios, this eliminates half or three-quarters of the 24ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * multiplications needed for color conversion. 25ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file currently provides implementations for the following cases: 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * YCbCr => RGB color conversion only. 28ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Sampling ratios of 2h1v or 2h2v. 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * No scaling needed at upsample time. 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Corner-aligned (non-CCIR601) sampling alignment. 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Other special cases could be added, but in most applications these are 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the only common cases. (For uncommon cases we fall back on the more 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * general code in jdsample.c and jdcolor.c.) 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 35ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JPEG_INTERNALS 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "jinclude.h" 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "jpeglib.h" 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 40ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef UPSAMPLE_MERGING_SUPPORTED 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef _FX_MANAGED_CODE_ 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define my_upsampler my_upsampler_m 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Private subobject */ 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef struct { 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov struct jpeg_upsampler pub; /* public fields */ 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Pointer to routine to do actual upsampling/conversion of one row group */ 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JMETHOD(void, upmethod, (j_decompress_ptr cinfo, 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPARRAY output_buf)); 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Private state for YCC->RGB conversion */ 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * Cr_r_tab; /* => table for Cr to R conversion */ 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * Cb_b_tab; /* => table for Cb to B conversion */ 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 * Cr_g_tab; /* => table for Cr to G conversion */ 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 * Cb_g_tab; /* => table for Cb to G conversion */ 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For 2:1 vertical sampling, we produce two output rows at a time. 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We need a "spare" row buffer to hold the second output row if the 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * application provides just a one-row buffer; we also use the spare 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * to discard the dummy last row if the image height is odd. 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPROW spare_row; 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov boolean spare_full; /* T if spare buffer is occupied */ 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION out_row_width; /* samples per output row */ 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION rows_to_go; /* counts rows remaining in image */ 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} my_upsampler; 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef my_upsampler * my_upsample_ptr; 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define SCALEBITS 16 /* speediest right-shift on some machines */ 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Initialize tables for YCC->RGB colorspace conversion. 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This is taken directly from jdcolor.c; see that file for more info. 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovbuild_ycc_rgb_table (j_decompress_ptr cinfo) 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int i; 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 x; 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SHIFT_TEMPS 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cr_r_tab = (int *) 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (MAXJSAMPLE+1) * SIZEOF(int)); 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cb_b_tab = (int *) 98ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 99ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (MAXJSAMPLE+1) * SIZEOF(int)); 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cr_g_tab = (INT32 *) 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (MAXJSAMPLE+1) * SIZEOF(INT32)); 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cb_g_tab = (INT32 *) 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (MAXJSAMPLE+1) * SIZEOF(INT32)); 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) { 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */ 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */ 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Cr=>R value is nearest int to 1.40200 * x */ 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cr_r_tab[i] = (int) 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS); 113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Cb=>B value is nearest int to 1.77200 * x */ 114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cb_b_tab[i] = (int) 115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS); 116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Cr=>G value is scaled-up -0.71414 * x */ 117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x; 118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Cb=>G value is scaled-up -0.34414 * x */ 119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We also add in ONE_HALF so that need not do it in inner loop */ 120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF; 121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Initialize for an upsampling pass. 127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 129ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 130ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovstart_pass_merged_upsample (j_decompress_ptr cinfo) 131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; 133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Mark the spare buffer empty */ 135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->spare_full = FALSE; 136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Initialize total-height counter for detecting bottom of image */ 137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->rows_to_go = cinfo->output_height; 138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Control routine to do upsampling (and color conversion). 143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * The control routine just handles the row buffering considerations. 145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 146ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 147ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 148ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovmerged_2v_upsample (j_decompress_ptr cinfo, 149ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, 150ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION in_row_groups_avail, 151ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, 152ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION out_rows_avail) 153ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 2:1 vertical sampling case: may need a spare row. */ 154ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 155ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; 156ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPROW work_ptrs[2]; 157ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION num_rows; /* number of rows returned to caller */ 158ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 159ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (upsample->spare_full) { 160ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* If we have a spare row saved from a previous cycle, just return it. */ 161ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0, 162ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1, upsample->out_row_width); 163ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov num_rows = 1; 164ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->spare_full = FALSE; 165ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 166ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Figure number of rows to return to caller. */ 167ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov num_rows = 2; 168ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Not more than the distance to the end of the image. */ 169ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (num_rows > upsample->rows_to_go) 170ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov num_rows = upsample->rows_to_go; 171ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* And not more than what the client can accept: */ 172ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov out_rows_avail -= *out_row_ctr; 173ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (num_rows > out_rows_avail) 174ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov num_rows = out_rows_avail; 175ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Create output pointer array for upsampler. */ 176ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov work_ptrs[0] = output_buf[*out_row_ctr]; 177ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (num_rows > 1) { 178ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov work_ptrs[1] = output_buf[*out_row_ctr + 1]; 179ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 180ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov work_ptrs[1] = upsample->spare_row; 181ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->spare_full = TRUE; 182ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 183ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Now do the upsampling. */ 184ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs); 185ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 186ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 187ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Adjust counts */ 188ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov *out_row_ctr += num_rows; 189ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->rows_to_go -= num_rows; 190ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* When the buffer is emptied, declare this input row group consumed */ 191ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! upsample->spare_full) 192ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*in_row_group_ctr)++; 193ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 194ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 195ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 196ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 197ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovmerged_1v_upsample (j_decompress_ptr cinfo, 198ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, 199ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION in_row_groups_avail, 200ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, 201ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION out_rows_avail) 202ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1:1 vertical sampling case: much easier, never need a spare row. */ 203ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 204ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; 205ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 206ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Just do the upsampling. */ 207ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, 208ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov output_buf + *out_row_ctr); 209ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Adjust counts */ 210ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*out_row_ctr)++; 211ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*in_row_group_ctr)++; 212ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 213ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 214ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 215ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 216ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * These are the routines invoked by the control routines to do 217ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the actual upsampling/conversion. One row group is processed per call. 218ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 219ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Note: since we may be writing directly into application-supplied buffers, 220ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * we have to be honest about the output width; we can't assume the buffer 221ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * has been rounded up to an even width. 222ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 223ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 224ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 225ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 226ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical. 227ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 228ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 229ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 230ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovh2v1_merged_upsample (j_decompress_ptr cinfo, 231ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, 232ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPARRAY output_buf) 233ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 234ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; 235ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov register int y, cred, cgreen, cblue; 236ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int cb, cr; 237ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov register JSAMPROW outptr; 238ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPROW inptr0, inptr1, inptr2; 239ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION col; 240ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* copy these pointers into registers if possible */ 241ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov register JSAMPLE * range_limit = cinfo->sample_range_limit; 242ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * Crrtab = upsample->Cr_r_tab; 243ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * Cbbtab = upsample->Cb_b_tab; 244ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 * Crgtab = upsample->Cr_g_tab; 245ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 * Cbgtab = upsample->Cb_g_tab; 246ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SHIFT_TEMPS 247ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 248ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr0 = input_buf[0][in_row_group_ctr]; 249ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr1 = input_buf[1][in_row_group_ctr]; 250ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr2 = input_buf[2][in_row_group_ctr]; 251ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr = output_buf[0]; 252ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Loop for each pair of output pixels */ 253ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (col = cinfo->output_width >> 1; col > 0; col--) { 254ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Do the chroma part of the calculation */ 255ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cb = GETJSAMPLE(*inptr1++); 256ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cr = GETJSAMPLE(*inptr2++); 257ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cred = Crrtab[cr]; 258ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); 259ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cblue = Cbbtab[cb]; 260ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Fetch 2 Y values and emit 2 pixels */ 261ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr0++); 262ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_RED] = range_limit[y + cred]; 263ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_GREEN] = range_limit[y + cgreen]; 264ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_BLUE] = range_limit[y + cblue]; 265ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr += RGB_PIXELSIZE; 266ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr0++); 267ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_RED] = range_limit[y + cred]; 268ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_GREEN] = range_limit[y + cgreen]; 269ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_BLUE] = range_limit[y + cblue]; 270ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr += RGB_PIXELSIZE; 271ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 272ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* If image width is odd, do the last output column separately */ 273ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->output_width & 1) { 274ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cb = GETJSAMPLE(*inptr1); 275ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cr = GETJSAMPLE(*inptr2); 276ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cred = Crrtab[cr]; 277ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); 278ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cblue = Cbbtab[cb]; 279ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr0); 280ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_RED] = range_limit[y + cred]; 281ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_GREEN] = range_limit[y + cgreen]; 282ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr[RGB_BLUE] = range_limit[y + cblue]; 283ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 284ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 285ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 286ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 287ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 288ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical. 289ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 290ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 291ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 292ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovh2v2_merged_upsample (j_decompress_ptr cinfo, 293ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr, 294ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPARRAY output_buf) 295ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 296ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample; 297ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov register int y, cred, cgreen, cblue; 298ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int cb, cr; 299ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov register JSAMPROW outptr0, outptr1; 300ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JSAMPROW inptr00, inptr01, inptr1, inptr2; 301ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION col; 302ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* copy these pointers into registers if possible */ 303ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov register JSAMPLE * range_limit = cinfo->sample_range_limit; 304ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * Crrtab = upsample->Cr_r_tab; 305ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * Cbbtab = upsample->Cb_b_tab; 306ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 * Crgtab = upsample->Cr_g_tab; 307ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 * Cbgtab = upsample->Cb_g_tab; 308ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SHIFT_TEMPS 309ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 310ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr00 = input_buf[0][in_row_group_ctr*2]; 311ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr01 = input_buf[0][in_row_group_ctr*2 + 1]; 312ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr1 = input_buf[1][in_row_group_ctr]; 313ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov inptr2 = input_buf[2][in_row_group_ctr]; 314ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0 = output_buf[0]; 315ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1 = output_buf[1]; 316ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Loop for each group of output pixels */ 317ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (col = cinfo->output_width >> 1; col > 0; col--) { 318ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Do the chroma part of the calculation */ 319ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cb = GETJSAMPLE(*inptr1++); 320ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cr = GETJSAMPLE(*inptr2++); 321ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cred = Crrtab[cr]; 322ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); 323ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cblue = Cbbtab[cb]; 324ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Fetch 4 Y values and emit 4 pixels */ 325ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr00++); 326ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_RED] = range_limit[y + cred]; 327ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_GREEN] = range_limit[y + cgreen]; 328ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_BLUE] = range_limit[y + cblue]; 329ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0 += RGB_PIXELSIZE; 330ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr00++); 331ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_RED] = range_limit[y + cred]; 332ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_GREEN] = range_limit[y + cgreen]; 333ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_BLUE] = range_limit[y + cblue]; 334ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0 += RGB_PIXELSIZE; 335ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr01++); 336ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_RED] = range_limit[y + cred]; 337ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_GREEN] = range_limit[y + cgreen]; 338ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_BLUE] = range_limit[y + cblue]; 339ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1 += RGB_PIXELSIZE; 340ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr01++); 341ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_RED] = range_limit[y + cred]; 342ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_GREEN] = range_limit[y + cgreen]; 343ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_BLUE] = range_limit[y + cblue]; 344ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1 += RGB_PIXELSIZE; 345ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 346ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* If image width is odd, do the last output column separately */ 347ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->output_width & 1) { 348ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cb = GETJSAMPLE(*inptr1); 349ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cr = GETJSAMPLE(*inptr2); 350ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cred = Crrtab[cr]; 351ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS); 352ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cblue = Cbbtab[cb]; 353ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr00); 354ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_RED] = range_limit[y + cred]; 355ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_GREEN] = range_limit[y + cgreen]; 356ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr0[RGB_BLUE] = range_limit[y + cblue]; 357ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov y = GETJSAMPLE(*inptr01); 358ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_RED] = range_limit[y + cred]; 359ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_GREEN] = range_limit[y + cgreen]; 360ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov outptr1[RGB_BLUE] = range_limit[y + cblue]; 361ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 362ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 363ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 364ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 365ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 366ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Module initialization routine for merged upsampling/color conversion. 367ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 368ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * NB: this is called under the conditions determined by use_merged_upsample() 369ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * in jdmaster.c. That routine MUST correspond to the actual capabilities 370ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * of this module; no safety checks are made here. 371ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 372ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 373ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovGLOBAL(void) 374ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovjinit_merged_upsampler (j_decompress_ptr cinfo) 375ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 376ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_upsample_ptr upsample; 377ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 378ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample = (my_upsample_ptr) 379ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 380ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SIZEOF(my_upsampler)); 381ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->upsample = (struct jpeg_upsampler *) upsample; 382ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->pub.start_pass = start_pass_merged_upsample; 383ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->pub.need_context_rows = FALSE; 384ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 385ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->out_row_width = cinfo->output_width * cinfo->out_color_components; 386ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 387ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->max_v_samp_factor == 2) { 388ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->pub.upsample = merged_2v_upsample; 389ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->upmethod = h2v2_merged_upsample; 390ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Allocate a spare row buffer */ 391ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->spare_row = (JSAMPROW) 392ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 393ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (size_t) (upsample->out_row_width * SIZEOF(JSAMPLE))); 394ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 395ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->pub.upsample = merged_1v_upsample; 396ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->upmethod = h2v1_merged_upsample; 397ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* No spare row needed */ 398ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov upsample->spare_row = NULL; 399ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 400ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 401ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov build_ycc_rgb_table(cinfo); 402ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 403ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 404ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* UPSAMPLE_MERGING_SUPPORTED */ 405ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 406ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif //_FX_JPEG_TURBO_ 407