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1025 lines
30 KiB
C
1025 lines
30 KiB
C
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/*
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* jdmerge.c
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*
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* Copyright (C) 1994-1996, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains code for merged upsampling/color conversion.
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*
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* This file combines functions from jdsample.c and jdcolor.c;
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* read those files first to understand what's going on.
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*
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* When the chroma components are to be upsampled by simple replication
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* (ie, box filtering), we can save some work in color conversion by
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* calculating all the output pixels corresponding to a pair of chroma
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* samples at one time. In the conversion equations
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* R = Y + K1 * Cr
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* G = Y + K2 * Cb + K3 * Cr
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* B = Y + K4 * Cb
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* only the Y term varies among the group of pixels corresponding to a pair
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* of chroma samples, so the rest of the terms can be calculated just once.
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* At typical sampling ratios, this eliminates half or three-quarters of the
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* multiplications needed for color conversion.
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*
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* This file currently provides implementations for the following cases:
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* YCbCr => RGB color conversion only.
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* Sampling ratios of 2h1v or 2h2v.
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* No scaling needed at upsample time.
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* Corner-aligned (non-CCIR601) sampling alignment.
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* Other special cases could be added, but in most applications these are
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* the only common cases. (For uncommon cases we fall back on the more
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* general code in jdsample.c and jdcolor.c.)
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*/
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#define JPEG_INTERNALS
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#include "jinclude.h"
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#include "jpeglib.h"
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#ifdef UPSAMPLE_MERGING_SUPPORTED
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#ifdef HAVE_MMX_INTEL_MNEMONICS
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__int64 const1 = 0x59BA0000D24B59BA; // Cr_r Cr_b Cr_g Cr_r
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__int64 const2 = 0x00007168E9FA0000; // Cb-r Cb_b Cb_g Cb_r
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__int64 const5 = 0x0000D24B59BA0000; // Cr_b Cr_g Cr_r Cr_b
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__int64 const6 = 0x7168E9FA00007168; // Cb_b Cb_g Cb_r Cb_b
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// constants for factors (One_Half/fix(x)) << 2
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__int64 const05 = 0x0001000000000001; // Cr_r Cr_b Cr_g Cr_r
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__int64 const15 = 0x00000001FFFA0000; // Cb-r Cb_b Cb_g Cb_r
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__int64 const45 = 0x0000000000010000; // Cr_b Cr_g Cr_r Cr_b
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__int64 const55 = 0x0001FFFA00000001; // Cb_b Cb_g Cb_r Cb_b
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#endif
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/* Private subobject */
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typedef struct {
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struct jpeg_upsampler pub; /* public fields */
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/* Pointer to routine to do actual upsampling/conversion of one row group */
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JMETHOD(void, upmethod, (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf));
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/* Private state for YCC->RGB conversion */
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int * Cr_r_tab; /* => table for Cr to R conversion */
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int * Cb_b_tab; /* => table for Cb to B conversion */
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INT32 * Cr_g_tab; /* => table for Cr to G conversion */
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INT32 * Cb_g_tab; /* => table for Cb to G conversion */
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/* For 2:1 vertical sampling, we produce two output rows at a time.
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* We need a "spare" row buffer to hold the second output row if the
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* application provides just a one-row buffer; we also use the spare
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* to discard the dummy last row if the image height is odd.
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*/
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JSAMPROW spare_row;
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boolean spare_full; /* T if spare buffer is occupied */
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JDIMENSION out_row_width; /* samples per output row */
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JDIMENSION rows_to_go; /* counts rows remaining in image */
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} my_upsampler;
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typedef my_upsampler * my_upsample_ptr;
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#define SCALEBITS 16 /* speediest right-shift on some machines */
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#define ONE_HALF ((INT32) 1 << (SCALEBITS-1))
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#define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
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/*
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* Initialize tables for YCC->RGB colorspace conversion.
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* This is taken directly from jdcolor.c; see that file for more info.
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*/
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LOCAL(void)
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build_ycc_rgb_table (j_decompress_ptr cinfo)
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{
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my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
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int i;
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INT32 x;
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SHIFT_TEMPS
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upsample->Cr_r_tab = (int *)
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(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
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(MAXJSAMPLE+1) * SIZEOF(int));
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upsample->Cb_b_tab = (int *)
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(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
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(MAXJSAMPLE+1) * SIZEOF(int));
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upsample->Cr_g_tab = (INT32 *)
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(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
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(MAXJSAMPLE+1) * SIZEOF(INT32));
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upsample->Cb_g_tab = (INT32 *)
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(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
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(MAXJSAMPLE+1) * SIZEOF(INT32));
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for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
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/* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
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/* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
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/* Cr=>R value is nearest int to 1.40200 * x */
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upsample->Cr_r_tab[i] = (int)
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RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
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/* Cb=>B value is nearest int to 1.77200 * x */
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upsample->Cb_b_tab[i] = (int)
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RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
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/* Cr=>G value is scaled-up -0.71414 * x */
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upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x;
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/* Cb=>G value is scaled-up -0.34414 * x */
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/* We also add in ONE_HALF so that need not do it in inner loop */
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upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
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}
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}
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/*
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* Initialize for an upsampling pass.
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*/
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METHODDEF(void)
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start_pass_merged_upsample (j_decompress_ptr cinfo)
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{
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my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
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/* Mark the spare buffer empty */
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upsample->spare_full = FALSE;
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/* Initialize total-height counter for detecting bottom of image */
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upsample->rows_to_go = cinfo->output_height;
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}
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/*
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* Control routine to do upsampling (and color conversion).
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*
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* The control routine just handles the row buffering considerations.
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*/
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METHODDEF(void)
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merged_2v_upsample (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
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JDIMENSION in_row_groups_avail,
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JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
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JDIMENSION out_rows_avail)
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/* 2:1 vertical sampling case: may need a spare row. */
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{
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my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
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JSAMPROW work_ptrs[2];
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JDIMENSION num_rows; /* number of rows returned to caller */
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if (upsample->spare_full) {
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/* If we have a spare row saved from a previous cycle, just return it. */
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jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0,
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1, upsample->out_row_width);
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num_rows = 1;
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upsample->spare_full = FALSE;
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} else {
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/* Figure number of rows to return to caller. */
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num_rows = 2;
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/* Not more than the distance to the end of the image. */
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if (num_rows > upsample->rows_to_go)
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num_rows = upsample->rows_to_go;
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/* And not more than what the client can accept: */
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out_rows_avail -= *out_row_ctr;
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if (num_rows > out_rows_avail)
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num_rows = out_rows_avail;
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/* Create output pointer array for upsampler. */
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work_ptrs[0] = output_buf[*out_row_ctr];
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if (num_rows > 1) {
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work_ptrs[1] = output_buf[*out_row_ctr + 1];
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} else {
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work_ptrs[1] = upsample->spare_row;
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upsample->spare_full = TRUE;
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}
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/* Now do the upsampling. */
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(*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
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}
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/* Adjust counts */
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*out_row_ctr += num_rows;
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upsample->rows_to_go -= num_rows;
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/* When the buffer is emptied, declare this input row group consumed */
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if (! upsample->spare_full)
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(*in_row_group_ctr)++;
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}
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METHODDEF(void)
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merged_1v_upsample (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
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JDIMENSION in_row_groups_avail,
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JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
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JDIMENSION out_rows_avail)
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/* 1:1 vertical sampling case: much easier, never need a spare row. */
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{
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my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
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/* Just do the upsampling. */
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(*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
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output_buf + *out_row_ctr);
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/* Adjust counts */
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(*out_row_ctr)++;
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(*in_row_group_ctr)++;
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}
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/*
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* These are the routines invoked by the control routines to do
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* the actual upsampling/conversion. One row group is processed per call.
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*
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* Note: since we may be writing directly into application-supplied buffers,
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* we have to be honest about the output width; we can't assume the buffer
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* has been rounded up to an even width.
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*/
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/*
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* Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
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*/
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METHODDEF(void)
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h2v1_merged_upsample (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf)
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{
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my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
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register int y, cred, cgreen, cblue;
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int cb, cr;
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register JSAMPROW outptr;
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JSAMPROW inptr0, inptr1, inptr2;
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JDIMENSION col;
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/* copy these pointers into registers if possible */
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register JSAMPLE * range_limit = cinfo->sample_range_limit;
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int * Crrtab = upsample->Cr_r_tab;
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int * Cbbtab = upsample->Cb_b_tab;
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INT32 * Crgtab = upsample->Cr_g_tab;
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INT32 * Cbgtab = upsample->Cb_g_tab;
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SHIFT_TEMPS
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inptr0 = input_buf[0][in_row_group_ctr];
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inptr1 = input_buf[1][in_row_group_ctr];
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inptr2 = input_buf[2][in_row_group_ctr];
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outptr = output_buf[0];
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/* Loop for each pair of output pixels */
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for (col = cinfo->output_width >> 1; col > 0; col--) {
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/* Do the chroma part of the calculation */
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cb = GETJSAMPLE(*inptr1++);
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cr = GETJSAMPLE(*inptr2++);
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cred = Crrtab[cr];
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cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
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cblue = Cbbtab[cb];
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/* Fetch 2 Y values and emit 2 pixels */
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y = GETJSAMPLE(*inptr0++);
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outptr[RGB_RED] = range_limit[y + cred];
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outptr[RGB_GREEN] = range_limit[y + cgreen];
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outptr[RGB_BLUE] = range_limit[y + cblue];
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outptr += RGB_PIXELSIZE;
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y = GETJSAMPLE(*inptr0++);
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outptr[RGB_RED] = range_limit[y + cred];
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outptr[RGB_GREEN] = range_limit[y + cgreen];
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outptr[RGB_BLUE] = range_limit[y + cblue];
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outptr += RGB_PIXELSIZE;
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}
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/* If image width is odd, do the last output column separately */
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if (cinfo->output_width & 1) {
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cb = GETJSAMPLE(*inptr1);
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cr = GETJSAMPLE(*inptr2);
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cred = Crrtab[cr];
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cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
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cblue = Cbbtab[cb];
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y = GETJSAMPLE(*inptr0);
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outptr[RGB_RED] = range_limit[y + cred];
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outptr[RGB_GREEN] = range_limit[y + cgreen];
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outptr[RGB_BLUE] = range_limit[y + cblue];
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}
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}
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/*
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* Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
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*/
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#ifdef HAVE_MMX_INTEL_MNEMONICS
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__inline METHODDEF(void)
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h2v2_merged_upsample_orig (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf);
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__inline METHODDEF(void)
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h2v2_merged_upsample_mmx (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf);
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#endif
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METHODDEF(void)
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h2v2_merged_upsample (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf);
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#ifdef HAVE_MMX_INTEL_MNEMONICS
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METHODDEF(void)
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h2v2_merged_upsample (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf)
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{
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if (MMXAvailable && (cinfo->image_width >= 8))
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h2v2_merged_upsample_mmx (cinfo, input_buf, in_row_group_ctr, output_buf);
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else
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h2v2_merged_upsample_orig (cinfo, input_buf, in_row_group_ctr, output_buf);
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}
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__inline METHODDEF(void)
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h2v2_merged_upsample_orig (j_decompress_ptr cinfo,
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JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
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JSAMPARRAY output_buf)
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{
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my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
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register int y, cred, cgreen, cblue;
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int cb, cr;
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register JSAMPROW outptr0, outptr1;
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JSAMPROW inptr00, inptr01, inptr1, inptr2;
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JDIMENSION col;
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/* copy these pointers into registers if possible */
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register JSAMPLE * range_limit = cinfo->sample_range_limit;
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int * Crrtab = upsample->Cr_r_tab;
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int * Cbbtab = upsample->Cb_b_tab;
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INT32 * Crgtab = upsample->Cr_g_tab;
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INT32 * Cbgtab = upsample->Cb_g_tab;
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SHIFT_TEMPS
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inptr00 = input_buf[0][in_row_group_ctr*2];
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inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
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inptr1 = input_buf[1][in_row_group_ctr];
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inptr2 = input_buf[2][in_row_group_ctr];
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outptr0 = output_buf[0];
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outptr1 = output_buf[1];
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/* Loop for each group of output pixels */
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for (col = cinfo->output_width >> 1; col > 0; col--) {
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/* Do the chroma part of the calculation */
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cb = GETJSAMPLE(*inptr1++);
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cr = GETJSAMPLE(*inptr2++);
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cred = Crrtab[cr];
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cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
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cblue = Cbbtab[cb];
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/* Fetch 4 Y values and emit 4 pixels */
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y = GETJSAMPLE(*inptr00++);
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outptr0[RGB_RED] = range_limit[y + cred];
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outptr0[RGB_GREEN] = range_limit[y + cgreen];
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outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
}
|
||
|
/* If image width is odd, do the last output column separately */
|
||
|
if (cinfo->output_width & 1) {
|
||
|
cb = GETJSAMPLE(*inptr1);
|
||
|
cr = GETJSAMPLE(*inptr2);
|
||
|
cred = Crrtab[cr];
|
||
|
cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
|
||
|
cblue = Cbbtab[cb];
|
||
|
y = GETJSAMPLE(*inptr00);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
y = GETJSAMPLE(*inptr01);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
|
||
|
*/
|
||
|
__inline METHODDEF(void)
|
||
|
h2v2_merged_upsample_mmx (j_decompress_ptr cinfo,
|
||
|
JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
|
||
|
JSAMPARRAY output_buf)
|
||
|
{
|
||
|
// added for MMX
|
||
|
__int64 const128 = 0x0080008000800080;
|
||
|
__int64 empty = 0x0000000000000000;
|
||
|
__int64 davemask = 0x0000FFFFFFFF0000;
|
||
|
////////////////////////////////
|
||
|
|
||
|
my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
|
||
|
register int y, cred, cgreen, cblue;
|
||
|
int cb, cr;
|
||
|
register JSAMPROW outptr0, outptr1;
|
||
|
JSAMPROW inptr00, inptr01, inptr1, inptr2;
|
||
|
JDIMENSION col;
|
||
|
/* copy these pointers into registers if possible */
|
||
|
register JSAMPLE * range_limit = cinfo->sample_range_limit;
|
||
|
int * Crrtab = upsample->Cr_r_tab;
|
||
|
int * Cbbtab = upsample->Cb_b_tab;
|
||
|
INT32 * Crgtab = upsample->Cr_g_tab;
|
||
|
INT32 * Cbgtab = upsample->Cb_g_tab;
|
||
|
SHIFT_TEMPS
|
||
|
|
||
|
|
||
|
// Added for MMX
|
||
|
register int width = cinfo->image_width;
|
||
|
int cols = cinfo->output_width;
|
||
|
int cols_asm = (cols >> 3);
|
||
|
int diff = cols - (cols_asm<<3);
|
||
|
int cols_asm_copy = cols_asm;
|
||
|
|
||
|
///////////////////////////////////////
|
||
|
|
||
|
inptr00 = input_buf[0][in_row_group_ctr*2];
|
||
|
inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
|
||
|
inptr1 = input_buf[1][in_row_group_ctr];
|
||
|
inptr2 = input_buf[2][in_row_group_ctr];
|
||
|
outptr0 = output_buf[0];
|
||
|
outptr1 = output_buf[1];
|
||
|
/* Loop for each group of output pixels */
|
||
|
|
||
|
|
||
|
_asm
|
||
|
{
|
||
|
mov esi, inptr00
|
||
|
|
||
|
mov eax, inptr01
|
||
|
|
||
|
mov ebx, inptr2
|
||
|
|
||
|
mov ecx, inptr1
|
||
|
|
||
|
mov edi, outptr0
|
||
|
|
||
|
mov edx, outptr1
|
||
|
|
||
|
do_next16:
|
||
|
|
||
|
movd mm0, [ebx] ; Cr7 Cr6.....Cr1 Cr0
|
||
|
|
||
|
pxor mm6, mm6
|
||
|
|
||
|
punpcklbw mm0, mm0 ; Cr3 Cr3 Cr2 Cr2 Cr1 Cr1 Cr0 Cr0
|
||
|
|
||
|
movq mm7, const128
|
||
|
|
||
|
punpcklwd mm0, mm0 ; Cr1 Cr1 Cr1 Cr1 Cr0 Cr0 Cr0 Cr0
|
||
|
|
||
|
movq mm4, mm0
|
||
|
|
||
|
punpcklbw mm0, mm6 ; Cr0 Cr0 Cr0 Cr0
|
||
|
|
||
|
psubsw mm0, mm7 ; Cr0 - 128:Cr0-128:Cr0-128:Cr0 -128
|
||
|
|
||
|
movd mm1, [ecx] ; Cb7 Cb6...... Cb1 Cb0
|
||
|
|
||
|
psllw mm0, 2 ; left shift by 2 bits
|
||
|
|
||
|
punpcklbw mm1, mm1 ; Cb3 Cb3 Cb2 Cb2 Cb1 Cb1 Cb0 Cb0
|
||
|
|
||
|
paddsw mm0, const05 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
punpcklwd mm1, mm1 ; Cb1 Cb1 Cb1 Cb1 Cb0 Cb0 Cb0 Cb0
|
||
|
|
||
|
movq mm5, mm1
|
||
|
|
||
|
pmulhw mm0, const1 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
punpcklbw mm1, mm6 ; Cb0 Cb0 Cb0 Cb0
|
||
|
|
||
|
punpckhbw mm4, mm6 ; Cr1 Cr1 Cr1 Cr1
|
||
|
|
||
|
psubsw mm1, mm7 ; Cb0 - 128:Cb0-128:Cb0-128:Cb0 -128
|
||
|
|
||
|
punpckhbw mm5, mm6 ; Cb1 Cb1 Cb1 Cb1
|
||
|
|
||
|
psllw mm1, 2 ; left shift by 2 bits
|
||
|
|
||
|
paddsw mm1, const15 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
psubsw mm4, mm7 ; Cr1 - 128:Cr1-128:Cr1-128:Cr1 -128
|
||
|
|
||
|
psubsw mm5, mm7 ; Cb1 - 128:Cb1-128:Cb1-128:Cb1 -128
|
||
|
|
||
|
pmulhw mm1, const2 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
psllw mm4, 2 ; left shift by 2 bits
|
||
|
|
||
|
psllw mm5, 2 ; left shift by 2 bits
|
||
|
|
||
|
paddsw mm4, const45 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
movd mm7, [esi] ; Y13 Y12 Y9 Y8 Y5 Y4 Y1 Y0
|
||
|
|
||
|
pmulhw mm4, const5 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
movq mm6, mm7
|
||
|
|
||
|
punpcklbw mm7, mm7 ; Y5 Y5 Y4 Y4 Y1 Y1 Y0 Y0
|
||
|
|
||
|
paddsw mm5, const55 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
paddsw mm0, mm1 ; cred0 cbl0 cgr0 cred0
|
||
|
|
||
|
movq mm1, mm7
|
||
|
|
||
|
pmulhw mm5, const6 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
movq mm2, mm0 ; cred0 cbl0 cgr0 cred0
|
||
|
|
||
|
punpcklwd mm7, mm6 ; Y5 Y4 Y1 Y1 Y1 Y0 Y0 Y0
|
||
|
|
||
|
pand mm2, davemask ; 0 cbl0 cgr0 0
|
||
|
|
||
|
psrlq mm1, 16 ; 0 0 Y5 Y5 Y4 Y4 Y1 Y1
|
||
|
|
||
|
psrlq mm2, 16 ; 0 0 cbl0 cgr0
|
||
|
|
||
|
punpcklbw mm7, empty ; Y1 Y0 Y0 Y0
|
||
|
|
||
|
paddsw mm4, mm5 ; cbl1 cgr1 cred1 cbl1
|
||
|
|
||
|
movq mm3, mm4 ; cbl1 cgr1 cred1 cbl1
|
||
|
|
||
|
pand mm3, davemask ; 0 cgr1 cred1 0
|
||
|
|
||
|
paddsw mm7, mm0 ; r1 b0 g0 r0
|
||
|
|
||
|
psllq mm3, 16 ; cgr1 cred1 0 0
|
||
|
|
||
|
movq mm6, mm1 ; 0 0 Y5 Y5 Y4 Y4 Y1 Y1
|
||
|
|
||
|
por mm2, mm3 ; cgr1 cred1 cbl0 cgr0
|
||
|
|
||
|
punpcklbw mm6, empty ; Y4 Y4 Y1 Y1
|
||
|
|
||
|
movd mm3, [eax] ; Y15 Y14 Y11 Y10 Y7 Y6 Y3 Y2
|
||
|
|
||
|
paddsw mm6, mm2 ; g4 r4 b1 g1
|
||
|
|
||
|
packuswb mm7, mm6 ; g4 r4 b1 g1 r1 b0 g0 r0
|
||
|
|
||
|
movq mm6, mm3 ; Y15 Y14 Y11 Y10 Y7 Y6 Y3 Y2
|
||
|
|
||
|
punpcklbw mm3, mm3 ; Y7 Y7 Y6 Y6 Y3 Y3 Y2 Y2
|
||
|
|
||
|
movq [edi], mm7 ; move to memory g4 r4 b1 g1 r1 b0 g0 r0
|
||
|
|
||
|
movq mm5, mm3 ; Y7 Y7 Y6 Y6 Y3 Y3 Y2 Y2
|
||
|
|
||
|
punpcklwd mm3, mm6 ; X X X X Y3 Y2 Y2 Y2
|
||
|
|
||
|
punpcklbw mm3, empty ; Y3 Y2 Y2 Y2
|
||
|
|
||
|
psrlq mm5, 16 ; 0 0 Y7 Y7 Y6 Y6 Y3 Y3
|
||
|
|
||
|
paddsw mm3, mm0 ; r3 b2 g2 r2
|
||
|
|
||
|
movq mm6, mm5 ; 0 0 Y7 Y7 Y6 Y6 Y3 Y3
|
||
|
|
||
|
movq mm0, mm1 ; 0 0 Y5 Y5 Y4 Y4 Y1 Y1
|
||
|
|
||
|
punpckldq mm6, mm6 ; X X X X Y6 Y6 Y3 Y3
|
||
|
|
||
|
punpcklbw mm6, empty ; Y6 Y6 Y3 Y3
|
||
|
|
||
|
psrlq mm1, 24 ; 0 0 0 0 0 Y5 Y5 Y4
|
||
|
|
||
|
paddsw mm6, mm2 ; g6 r6 b3 g3
|
||
|
|
||
|
packuswb mm3, mm6 ; g6 r6 b3 g3 r3 b2 g2 r2
|
||
|
|
||
|
movq mm2, mm5 ; 0 0 Y7 Y7 Y6 Y6 Y3 Y3
|
||
|
|
||
|
psrlq mm0, 32 ; 0 0 0 0 0 0 Y5 Y5
|
||
|
|
||
|
movq [edx], mm3 ; move to memory g6 r6 b3 g3 r3 b2 g2 r2
|
||
|
|
||
|
punpcklwd mm1, mm0 ; X X X X Y5 Y5 Y5 Y4
|
||
|
|
||
|
psrlq mm5, 24 ; 0 0 0 0 0 Y7 Y7 Y6
|
||
|
|
||
|
movd mm0, [ebx] ; Cr9 Cr8.....Cr3 Cr2
|
||
|
|
||
|
psrlq mm2, 32 ; 0 0 0 0 0 0 Y7 Y7
|
||
|
|
||
|
psrlq mm0, 16
|
||
|
|
||
|
punpcklbw mm1, empty ; Y5 Y5 Y5 Y4
|
||
|
|
||
|
punpcklwd mm5, mm2 ; X X X X Y7 Y7 Y7 Y6
|
||
|
|
||
|
paddsw mm1, mm4 ; b5 g5 r5 b4
|
||
|
|
||
|
punpcklbw mm5, empty ; Y7 Y7 Y7 Y6
|
||
|
|
||
|
pxor mm6, mm6 ; clear mm6 registr
|
||
|
|
||
|
punpcklbw mm0, mm0 ; X X X X Cr3 Cr3 Cr2 Cr2
|
||
|
|
||
|
paddsw mm5, mm4 ; b7 g7 r7 b6
|
||
|
|
||
|
punpcklwd mm0, mm0 ; Cr3 Cr3 Cr3 Cr3 Cr2 Cr2 Cr2 Cr2
|
||
|
|
||
|
movq mm4, mm0
|
||
|
|
||
|
movd mm3, [ecx] ; Cb9 Cb8...... Cb3 Cb2
|
||
|
|
||
|
punpcklbw mm0, mm6 ; Cr2 Cr2 Cr2 Cr2
|
||
|
|
||
|
psrlq mm3, 16
|
||
|
|
||
|
psubsw mm0, const128 ; Cr2 - 128:Cr2-128:Cr2-128:Cr2 -128
|
||
|
|
||
|
punpcklbw mm3, mm3 ; X X X X Cb3 Cb3 Cb2 Cb2
|
||
|
|
||
|
psllw mm0, 2 ; left shift by 2 bits
|
||
|
|
||
|
paddsw mm0, const05 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
punpcklwd mm3, mm3 ; Cb3 Cb3 Cb3 Cb3 Cb2 Cb2 Cb2 Cb2
|
||
|
|
||
|
movq mm7, mm3
|
||
|
|
||
|
pmulhw mm0, const1 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
punpcklbw mm3, mm6 ; Cb2 Cb2 Cb2 Cb2
|
||
|
|
||
|
psubsw mm3, const128 ; Cb0 - 128:Cb0-128:Cb0-128:Cb0 -128
|
||
|
|
||
|
punpckhbw mm4, mm6 ; Cr3 Cr3 Cr3 Cr3
|
||
|
|
||
|
psllw mm3, 2 ; left shift by 2 bits
|
||
|
|
||
|
paddsw mm3, const15 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
punpckhbw mm7, mm6 ; Cb3 Cb3 Cb3 Cb3
|
||
|
|
||
|
pmulhw mm3, const2 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
psubsw mm7, const128 ; Cb3 - 128:Cb3-128:Cb3-128:Cb3 -128
|
||
|
|
||
|
paddsw mm0, mm3 ; cred2 cbl2 cgr2 cred2
|
||
|
|
||
|
psllw mm7, 2 ; left shift by 2 bits
|
||
|
|
||
|
psubsw mm4, const128 ; Cr3 - 128:Cr3-128:Cr3-128:Cr3 -128
|
||
|
|
||
|
movd mm3, [esi+4] ; Y21 Y20 Y17 Y16 Y13 Y12 Y9 Y8
|
||
|
|
||
|
psllw mm4, 2 ; left shift by 2 bits
|
||
|
|
||
|
paddsw mm7, const55 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
movq mm6, mm3 ; Y21 Y20 Y17 Y16 Y13 Y12 Y9 Y8
|
||
|
|
||
|
movq mm2, mm0
|
||
|
|
||
|
pand mm2, davemask
|
||
|
|
||
|
punpcklbw mm3, mm3 ; Y13 Y13 Y12 Y12 Y9 Y9 Y8 Y8
|
||
|
|
||
|
psrlq mm2, 16
|
||
|
|
||
|
paddsw mm4, const45 ; add (one_half/fix(x)) << 2
|
||
|
|
||
|
punpcklwd mm3, mm6 ; X X X X Y9 Y8 Y8 Y8
|
||
|
|
||
|
pmulhw mm4, const5 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
pmulhw mm7, const6 ; multiply by (fix(x) >> 1)
|
||
|
|
||
|
punpcklbw mm3, empty ; Y9 Y8 Y8 Y8
|
||
|
|
||
|
paddsw mm4, mm7 ; cbl3 cgr3 cred3 cbl3
|
||
|
|
||
|
paddsw mm3, mm0 ; r9 b8 g8 r8
|
||
|
|
||
|
movq mm7, mm4
|
||
|
|
||
|
packuswb mm1, mm3 ; r9 b8 g8 r8 b5 g5 r5 b4
|
||
|
|
||
|
movd mm3, [eax+4] ; Y23 Y22 Y19 Y18 Y15 Y14 Y11 Y10
|
||
|
|
||
|
pand mm7, davemask
|
||
|
|
||
|
psrlq mm6, 8 ; 0 Y21 Y20 Y17 Y16 Y13 Y12 Y9
|
||
|
|
||
|
psllq mm7, 16
|
||
|
|
||
|
movq [edi+8], mm1 ; move to memory r9 b8 g8 r8 b5 g5 r5 b4
|
||
|
|
||
|
por mm2, mm7
|
||
|
|
||
|
movq mm7, mm3 ; Y23 Y22 Y19 Y18 Y15 Y14 Y11 Y10
|
||
|
|
||
|
punpcklbw mm3, mm3 ; X X X X Y11 Y11 Y10 Y10
|
||
|
|
||
|
pxor mm1, mm1
|
||
|
|
||
|
punpcklwd mm3, mm7 ; X X X X Y11 Y10 Y10 Y10
|
||
|
|
||
|
punpcklbw mm3, mm1 ; Y11 Y10 Y10 Y10
|
||
|
|
||
|
psrlq mm7, 8 ; 0 Y23 Y22 Y19 Y18 Y15 Y14 Y11
|
||
|
|
||
|
paddsw mm3, mm0 ; r11 b10 g10 r10
|
||
|
|
||
|
movq mm0, mm7 ; 0 Y23 Y22 Y19 Y18 Y15 Y14 Y11
|
||
|
|
||
|
packuswb mm5, mm3 ; r11 b10 g10 r10 b7 g7 r7 b6
|
||
|
|
||
|
punpcklbw mm7, mm7 ; X X X X Y14 Y14 Y11 Y11
|
||
|
|
||
|
movq [edx+8], mm5 ; move to memory r11 b10 g10 r10 b7 g7 r7 b6
|
||
|
|
||
|
movq mm3, mm6 ; 0 Y21 Y20 Y17 Y16 Y13 Y12 Y9
|
||
|
|
||
|
punpcklbw mm6, mm6 ; X X X X Y12 Y12 Y9 Y9
|
||
|
|
||
|
punpcklbw mm7, mm1 ; Y14 Y14 Y11 Y11
|
||
|
|
||
|
punpcklbw mm6, mm1 ; Y12 Y12 Y9 Y9
|
||
|
|
||
|
paddsw mm7, mm2 ; g14 r14 b11 g11
|
||
|
|
||
|
paddsw mm6, mm2 ; g12 r12 b9 g9
|
||
|
|
||
|
psrlq mm3, 8 ; 0 0 Y21 Y20 Y17 Y16 Y13 Y12
|
||
|
|
||
|
movq mm1, mm3 ; 0 0 Y21 Y20 Y17 Y16 Y13 Y12
|
||
|
|
||
|
punpcklbw mm3, mm3 ; X X X X Y13 Y13 Y12 Y12
|
||
|
|
||
|
add esi, 8
|
||
|
|
||
|
psrlq mm3, 16 ; X X X X X X Y13 Y13 modified on 09/24
|
||
|
|
||
|
punpcklwd mm1, mm3 ; X X X X Y13 Y13 Y13 Y12
|
||
|
|
||
|
add eax, 8
|
||
|
|
||
|
psrlq mm0, 8 ; 0 0 Y23 Y22 Y19 Y18 Y15 Y14
|
||
|
|
||
|
punpcklbw mm1, empty ; Y13 Y13 Y13 Y12
|
||
|
|
||
|
movq mm5, mm0 ; 0 0 Y23 Y22 Y19 Y18 Y15 Y14
|
||
|
|
||
|
punpcklbw mm0, mm0 ; X X X X Y15 Y15 Y14 Y14
|
||
|
|
||
|
paddsw mm1, mm4 ; b13 g13 r13 b12
|
||
|
|
||
|
psrlq mm0, 16 ; X X X X X X Y15 Y15
|
||
|
|
||
|
add edi, 24
|
||
|
|
||
|
punpcklwd mm5, mm0 ; X X X X Y15 Y15 Y15 Y14
|
||
|
|
||
|
packuswb mm6, mm1 ; b13 g13 r13 b12 g12 r12 b9 g9
|
||
|
|
||
|
add edx, 24
|
||
|
|
||
|
punpcklbw mm5, empty ; Y15 Y15 Y15 Y14
|
||
|
|
||
|
add ebx, 4
|
||
|
|
||
|
paddsw mm5, mm4 ; b15 g15 r15 b14
|
||
|
|
||
|
movq [edi-8], mm6 ; move to memory b13 g13 r13 b12 g12 r12 b9 g9
|
||
|
|
||
|
packuswb mm7, mm5 ; b15 g15 r15 b14 g14 r14 b11 g11
|
||
|
|
||
|
add ecx, 4
|
||
|
|
||
|
movq [edx-8], mm7 ; move to memory b15 g15 r15 b14 g14 r14 b11 g11
|
||
|
|
||
|
dec cols_asm
|
||
|
|
||
|
jnz do_next16
|
||
|
|
||
|
EMMS
|
||
|
|
||
|
}
|
||
|
|
||
|
|
||
|
inptr1 += (cols_asm_copy<<2);
|
||
|
|
||
|
inptr2 += (cols_asm_copy<<2);
|
||
|
|
||
|
inptr00 += (cols_asm_copy<<3);
|
||
|
|
||
|
inptr01 += (cols_asm_copy<<3);
|
||
|
|
||
|
outptr0 += cols_asm_copy*24;
|
||
|
|
||
|
outptr1 += cols_asm_copy*24;
|
||
|
|
||
|
//for (col = cinfo->output_width >> 1; col > 0; col--) {
|
||
|
/* Do the chroma part of the calculation */
|
||
|
/*cb = GETJSAMPLE(*inptr1++);
|
||
|
cr = GETJSAMPLE(*inptr2++);
|
||
|
cred = Crrtab[cr];
|
||
|
cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
|
||
|
cblue = Cbbtab[cb];*/
|
||
|
/* Fetch 4 Y values and emit 4 pixels */
|
||
|
/*y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
} */
|
||
|
|
||
|
|
||
|
for (col = diff >> 1; col > 0; col--) {
|
||
|
/* Do the chroma part of the calculation */
|
||
|
cb = GETJSAMPLE(*inptr1++);
|
||
|
cr = GETJSAMPLE(*inptr2++);
|
||
|
cred = Crrtab[cr];
|
||
|
cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
|
||
|
cblue = Cbbtab[cb];
|
||
|
/* Fetch 4 Y values and emit 4 pixels */
|
||
|
y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
}
|
||
|
|
||
|
|
||
|
/* If image width is odd, do the last output column separately */
|
||
|
//if (cinfo->output_width & 1) {
|
||
|
if (diff & 1) {
|
||
|
cb = GETJSAMPLE(*inptr1);
|
||
|
cr = GETJSAMPLE(*inptr2);
|
||
|
cred = Crrtab[cr];
|
||
|
cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
|
||
|
cblue = Cbbtab[cb];
|
||
|
y = GETJSAMPLE(*inptr00);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
y = GETJSAMPLE(*inptr01);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
}
|
||
|
}
|
||
|
#else
|
||
|
|
||
|
|
||
|
METHODDEF(void)
|
||
|
h2v2_merged_upsample (j_decompress_ptr cinfo,
|
||
|
JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
|
||
|
JSAMPARRAY output_buf)
|
||
|
{
|
||
|
my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
|
||
|
register int y, cred, cgreen, cblue;
|
||
|
int cb, cr;
|
||
|
register JSAMPROW outptr0, outptr1;
|
||
|
JSAMPROW inptr00, inptr01, inptr1, inptr2;
|
||
|
JDIMENSION col;
|
||
|
/* copy these pointers into registers if possible */
|
||
|
register JSAMPLE * range_limit = cinfo->sample_range_limit;
|
||
|
int * Crrtab = upsample->Cr_r_tab;
|
||
|
int * Cbbtab = upsample->Cb_b_tab;
|
||
|
INT32 * Crgtab = upsample->Cr_g_tab;
|
||
|
INT32 * Cbgtab = upsample->Cb_g_tab;
|
||
|
SHIFT_TEMPS
|
||
|
|
||
|
inptr00 = input_buf[0][in_row_group_ctr*2];
|
||
|
inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
|
||
|
inptr1 = input_buf[1][in_row_group_ctr];
|
||
|
inptr2 = input_buf[2][in_row_group_ctr];
|
||
|
outptr0 = output_buf[0];
|
||
|
outptr1 = output_buf[1];
|
||
|
/* Loop for each group of output pixels */
|
||
|
for (col = cinfo->output_width >> 1; col > 0; col--) {
|
||
|
/* Do the chroma part of the calculation */
|
||
|
cb = GETJSAMPLE(*inptr1++);
|
||
|
cr = GETJSAMPLE(*inptr2++);
|
||
|
cred = Crrtab[cr];
|
||
|
cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
|
||
|
cblue = Cbbtab[cb];
|
||
|
/* Fetch 4 Y values and emit 4 pixels */
|
||
|
y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr00++);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr0 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
y = GETJSAMPLE(*inptr01++);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
outptr1 += RGB_PIXELSIZE;
|
||
|
}
|
||
|
/* If image width is odd, do the last output column separately */
|
||
|
if (cinfo->output_width & 1) {
|
||
|
cb = GETJSAMPLE(*inptr1);
|
||
|
cr = GETJSAMPLE(*inptr2);
|
||
|
cred = Crrtab[cr];
|
||
|
cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
|
||
|
cblue = Cbbtab[cb];
|
||
|
y = GETJSAMPLE(*inptr00);
|
||
|
outptr0[RGB_RED] = range_limit[y + cred];
|
||
|
outptr0[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr0[RGB_BLUE] = range_limit[y + cblue];
|
||
|
y = GETJSAMPLE(*inptr01);
|
||
|
outptr1[RGB_RED] = range_limit[y + cred];
|
||
|
outptr1[RGB_GREEN] = range_limit[y + cgreen];
|
||
|
outptr1[RGB_BLUE] = range_limit[y + cblue];
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Module initialization routine for merged upsampling/color conversion.
|
||
|
*
|
||
|
* NB: this is called under the conditions determined by use_merged_upsample()
|
||
|
* in jdmaster.c. That routine MUST correspond to the actual capabilities
|
||
|
* of this module; no safety checks are made here.
|
||
|
*/
|
||
|
|
||
|
GLOBAL(void)
|
||
|
jinit_merged_upsampler (j_decompress_ptr cinfo)
|
||
|
{
|
||
|
my_upsample_ptr upsample;
|
||
|
|
||
|
upsample = (my_upsample_ptr)
|
||
|
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
|
||
|
SIZEOF(my_upsampler));
|
||
|
cinfo->upsample = (struct jpeg_upsampler *) upsample;
|
||
|
upsample->pub.start_pass = start_pass_merged_upsample;
|
||
|
upsample->pub.need_context_rows = FALSE;
|
||
|
|
||
|
upsample->out_row_width = cinfo->output_width * cinfo->out_color_components;
|
||
|
|
||
|
if (cinfo->max_v_samp_factor == 2) {
|
||
|
upsample->pub.upsample = merged_2v_upsample;
|
||
|
upsample->upmethod = h2v2_merged_upsample;
|
||
|
/* Allocate a spare row buffer */
|
||
|
upsample->spare_row = (JSAMPROW)
|
||
|
(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
|
||
|
(size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
|
||
|
} else {
|
||
|
upsample->pub.upsample = merged_1v_upsample;
|
||
|
upsample->upmethod = h2v1_merged_upsample;
|
||
|
/* No spare row needed */
|
||
|
upsample->spare_row = NULL;
|
||
|
}
|
||
|
|
||
|
build_ycc_rgb_table(cinfo);
|
||
|
}
|
||
|
|
||
|
#endif /* UPSAMPLE_MERGING_SUPPORTED */
|