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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /media/libjpeg/jdmerge.c
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/libjpeg/jdmerge.c')
-rw-r--r--media/libjpeg/jdmerge.c587
1 files changed, 587 insertions, 0 deletions
diff --git a/media/libjpeg/jdmerge.c b/media/libjpeg/jdmerge.c
new file mode 100644
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--- /dev/null
+++ b/media/libjpeg/jdmerge.c
@@ -0,0 +1,587 @@
+/*
+ * jdmerge.c
+ *
+ * This file was part of the Independent JPEG Group's software:
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * libjpeg-turbo Modifications:
+ * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+ * Copyright (C) 2009, 2011, 2014-2015, 2020, D. R. Commander.
+ * Copyright (C) 2013, Linaro Limited.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
+ *
+ * This file contains code for merged upsampling/color conversion.
+ *
+ * This file combines functions from jdsample.c and jdcolor.c;
+ * read those files first to understand what's going on.
+ *
+ * When the chroma components are to be upsampled by simple replication
+ * (ie, box filtering), we can save some work in color conversion by
+ * calculating all the output pixels corresponding to a pair of chroma
+ * samples at one time. In the conversion equations
+ * R = Y + K1 * Cr
+ * G = Y + K2 * Cb + K3 * Cr
+ * B = Y + K4 * Cb
+ * only the Y term varies among the group of pixels corresponding to a pair
+ * of chroma samples, so the rest of the terms can be calculated just once.
+ * At typical sampling ratios, this eliminates half or three-quarters of the
+ * multiplications needed for color conversion.
+ *
+ * This file currently provides implementations for the following cases:
+ * YCbCr => RGB color conversion only.
+ * Sampling ratios of 2h1v or 2h2v.
+ * No scaling needed at upsample time.
+ * Corner-aligned (non-CCIR601) sampling alignment.
+ * Other special cases could be added, but in most applications these are
+ * the only common cases. (For uncommon cases we fall back on the more
+ * general code in jdsample.c and jdcolor.c.)
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdmerge.h"
+#include "jsimd.h"
+
+#ifdef UPSAMPLE_MERGING_SUPPORTED
+
+
+#define SCALEBITS 16 /* speediest right-shift on some machines */
+#define ONE_HALF ((JLONG)1 << (SCALEBITS - 1))
+#define FIX(x) ((JLONG)((x) * (1L << SCALEBITS) + 0.5))
+
+
+/* Include inline routines for colorspace extensions */
+
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+
+#define RGB_RED EXT_RGB_RED
+#define RGB_GREEN EXT_RGB_GREEN
+#define RGB_BLUE EXT_RGB_BLUE
+#define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
+#define h2v1_merged_upsample_internal extrgb_h2v1_merged_upsample_internal
+#define h2v2_merged_upsample_internal extrgb_h2v2_merged_upsample_internal
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef h2v1_merged_upsample_internal
+#undef h2v2_merged_upsample_internal
+
+#define RGB_RED EXT_RGBX_RED
+#define RGB_GREEN EXT_RGBX_GREEN
+#define RGB_BLUE EXT_RGBX_BLUE
+#define RGB_ALPHA 3
+#define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
+#define h2v1_merged_upsample_internal extrgbx_h2v1_merged_upsample_internal
+#define h2v2_merged_upsample_internal extrgbx_h2v2_merged_upsample_internal
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_ALPHA
+#undef RGB_PIXELSIZE
+#undef h2v1_merged_upsample_internal
+#undef h2v2_merged_upsample_internal
+
+#define RGB_RED EXT_BGR_RED
+#define RGB_GREEN EXT_BGR_GREEN
+#define RGB_BLUE EXT_BGR_BLUE
+#define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
+#define h2v1_merged_upsample_internal extbgr_h2v1_merged_upsample_internal
+#define h2v2_merged_upsample_internal extbgr_h2v2_merged_upsample_internal
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef h2v1_merged_upsample_internal
+#undef h2v2_merged_upsample_internal
+
+#define RGB_RED EXT_BGRX_RED
+#define RGB_GREEN EXT_BGRX_GREEN
+#define RGB_BLUE EXT_BGRX_BLUE
+#define RGB_ALPHA 3
+#define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
+#define h2v1_merged_upsample_internal extbgrx_h2v1_merged_upsample_internal
+#define h2v2_merged_upsample_internal extbgrx_h2v2_merged_upsample_internal
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_ALPHA
+#undef RGB_PIXELSIZE
+#undef h2v1_merged_upsample_internal
+#undef h2v2_merged_upsample_internal
+
+#define RGB_RED EXT_XBGR_RED
+#define RGB_GREEN EXT_XBGR_GREEN
+#define RGB_BLUE EXT_XBGR_BLUE
+#define RGB_ALPHA 0
+#define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
+#define h2v1_merged_upsample_internal extxbgr_h2v1_merged_upsample_internal
+#define h2v2_merged_upsample_internal extxbgr_h2v2_merged_upsample_internal
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_ALPHA
+#undef RGB_PIXELSIZE
+#undef h2v1_merged_upsample_internal
+#undef h2v2_merged_upsample_internal
+
+#define RGB_RED EXT_XRGB_RED
+#define RGB_GREEN EXT_XRGB_GREEN
+#define RGB_BLUE EXT_XRGB_BLUE
+#define RGB_ALPHA 0
+#define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
+#define h2v1_merged_upsample_internal extxrgb_h2v1_merged_upsample_internal
+#define h2v2_merged_upsample_internal extxrgb_h2v2_merged_upsample_internal
+#include "jdmrgext.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_ALPHA
+#undef RGB_PIXELSIZE
+#undef h2v1_merged_upsample_internal
+#undef h2v2_merged_upsample_internal
+
+
+/*
+ * Initialize tables for YCC->RGB colorspace conversion.
+ * This is taken directly from jdcolor.c; see that file for more info.
+ */
+
+LOCAL(void)
+build_ycc_rgb_table(j_decompress_ptr cinfo)
+{
+ my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
+ int i;
+ JLONG x;
+ SHIFT_TEMPS
+
+ upsample->Cr_r_tab = (int *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ (MAXJSAMPLE + 1) * sizeof(int));
+ upsample->Cb_b_tab = (int *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ (MAXJSAMPLE + 1) * sizeof(int));
+ upsample->Cr_g_tab = (JLONG *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ (MAXJSAMPLE + 1) * sizeof(JLONG));
+ upsample->Cb_g_tab = (JLONG *)
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ (MAXJSAMPLE + 1) * sizeof(JLONG));
+
+ for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
+ /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
+ /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
+ /* Cr=>R value is nearest int to 1.40200 * x */
+ upsample->Cr_r_tab[i] = (int)
+ RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
+ /* Cb=>B value is nearest int to 1.77200 * x */
+ upsample->Cb_b_tab[i] = (int)
+ RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
+ /* Cr=>G value is scaled-up -0.71414 * x */
+ upsample->Cr_g_tab[i] = (-FIX(0.71414)) * x;
+ /* Cb=>G value is scaled-up -0.34414 * x */
+ /* We also add in ONE_HALF so that need not do it in inner loop */
+ upsample->Cb_g_tab[i] = (-FIX(0.34414)) * x + ONE_HALF;
+ }
+}
+
+
+/*
+ * Initialize for an upsampling pass.
+ */
+
+METHODDEF(void)
+start_pass_merged_upsample(j_decompress_ptr cinfo)
+{
+ my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
+
+ /* Mark the spare buffer empty */
+ upsample->spare_full = FALSE;
+ /* Initialize total-height counter for detecting bottom of image */
+ upsample->rows_to_go = cinfo->output_height;
+}
+
+
+/*
+ * Control routine to do upsampling (and color conversion).
+ *
+ * The control routine just handles the row buffering considerations.
+ */
+
+METHODDEF(void)
+merged_2v_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION *in_row_group_ctr,
+ JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf,
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail)
+/* 2:1 vertical sampling case: may need a spare row. */
+{
+ my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
+ JSAMPROW work_ptrs[2];
+ JDIMENSION num_rows; /* number of rows returned to caller */
+
+ if (upsample->spare_full) {
+ /* If we have a spare row saved from a previous cycle, just return it. */
+ JDIMENSION size = upsample->out_row_width;
+ if (cinfo->out_color_space == JCS_RGB565)
+ size = cinfo->output_width * 2;
+ jcopy_sample_rows(&upsample->spare_row, 0, output_buf + *out_row_ctr, 0, 1,
+ size);
+ num_rows = 1;
+ upsample->spare_full = FALSE;
+ } else {
+ /* Figure number of rows to return to caller. */
+ num_rows = 2;
+ /* Not more than the distance to the end of the image. */
+ if (num_rows > upsample->rows_to_go)
+ num_rows = upsample->rows_to_go;
+ /* And not more than what the client can accept: */
+ out_rows_avail -= *out_row_ctr;
+ if (num_rows > out_rows_avail)
+ num_rows = out_rows_avail;
+ /* Create output pointer array for upsampler. */
+ work_ptrs[0] = output_buf[*out_row_ctr];
+ if (num_rows > 1) {
+ work_ptrs[1] = output_buf[*out_row_ctr + 1];
+ } else {
+ work_ptrs[1] = upsample->spare_row;
+ upsample->spare_full = TRUE;
+ }
+ /* Now do the upsampling. */
+ (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
+ }
+
+ /* Adjust counts */
+ *out_row_ctr += num_rows;
+ upsample->rows_to_go -= num_rows;
+ /* When the buffer is emptied, declare this input row group consumed */
+ if (!upsample->spare_full)
+ (*in_row_group_ctr)++;
+}
+
+
+METHODDEF(void)
+merged_1v_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION *in_row_group_ctr,
+ JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf,
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail)
+/* 1:1 vertical sampling case: much easier, never need a spare row. */
+{
+ my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
+
+ /* Just do the upsampling. */
+ (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
+ output_buf + *out_row_ctr);
+ /* Adjust counts */
+ (*out_row_ctr)++;
+ (*in_row_group_ctr)++;
+}
+
+
+/*
+ * These are the routines invoked by the control routines to do
+ * the actual upsampling/conversion. One row group is processed per call.
+ *
+ * Note: since we may be writing directly into application-supplied buffers,
+ * we have to be honest about the output width; we can't assume the buffer
+ * has been rounded up to an even width.
+ */
+
+
+/*
+ * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
+ */
+
+METHODDEF(void)
+h2v1_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
+{
+ switch (cinfo->out_color_space) {
+ case JCS_EXT_RGB:
+ extrgb_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_RGBX:
+ case JCS_EXT_RGBA:
+ extrgbx_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_BGR:
+ extbgr_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_BGRX:
+ case JCS_EXT_BGRA:
+ extbgrx_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_XBGR:
+ case JCS_EXT_ABGR:
+ extxbgr_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_XRGB:
+ case JCS_EXT_ARGB:
+ extxrgb_h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ default:
+ h2v1_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ }
+}
+
+
+/*
+ * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
+ */
+
+METHODDEF(void)
+h2v2_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
+{
+ switch (cinfo->out_color_space) {
+ case JCS_EXT_RGB:
+ extrgb_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_RGBX:
+ case JCS_EXT_RGBA:
+ extrgbx_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_BGR:
+ extbgr_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_BGRX:
+ case JCS_EXT_BGRA:
+ extbgrx_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_XBGR:
+ case JCS_EXT_ABGR:
+ extxbgr_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ case JCS_EXT_XRGB:
+ case JCS_EXT_ARGB:
+ extxrgb_h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ default:
+ h2v2_merged_upsample_internal(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ break;
+ }
+}
+
+
+/*
+ * RGB565 conversion
+ */
+
+#define PACK_SHORT_565_LE(r, g, b) \
+ ((((r) << 8) & 0xF800) | (((g) << 3) & 0x7E0) | ((b) >> 3))
+#define PACK_SHORT_565_BE(r, g, b) \
+ (((r) & 0xF8) | ((g) >> 5) | (((g) << 11) & 0xE000) | (((b) << 5) & 0x1F00))
+
+#define PACK_TWO_PIXELS_LE(l, r) ((r << 16) | l)
+#define PACK_TWO_PIXELS_BE(l, r) ((l << 16) | r)
+
+#define WRITE_TWO_PIXELS_LE(addr, pixels) { \
+ ((INT16 *)(addr))[0] = (INT16)(pixels); \
+ ((INT16 *)(addr))[1] = (INT16)((pixels) >> 16); \
+}
+#define WRITE_TWO_PIXELS_BE(addr, pixels) { \
+ ((INT16 *)(addr))[1] = (INT16)(pixels); \
+ ((INT16 *)(addr))[0] = (INT16)((pixels) >> 16); \
+}
+
+#define DITHER_565_R(r, dither) ((r) + ((dither) & 0xFF))
+#define DITHER_565_G(g, dither) ((g) + (((dither) & 0xFF) >> 1))
+#define DITHER_565_B(b, dither) ((b) + ((dither) & 0xFF))
+
+
+/* Declarations for ordered dithering
+ *
+ * We use a 4x4 ordered dither array packed into 32 bits. This array is
+ * sufficient for dithering RGB888 to RGB565.
+ */
+
+#define DITHER_MASK 0x3
+#define DITHER_ROTATE(x) ((((x) & 0xFF) << 24) | (((x) >> 8) & 0x00FFFFFF))
+static const JLONG dither_matrix[4] = {
+ 0x0008020A,
+ 0x0C040E06,
+ 0x030B0109,
+ 0x0F070D05
+};
+
+
+/* Include inline routines for RGB565 conversion */
+
+#define PACK_SHORT_565 PACK_SHORT_565_LE
+#define PACK_TWO_PIXELS PACK_TWO_PIXELS_LE
+#define WRITE_TWO_PIXELS WRITE_TWO_PIXELS_LE
+#define h2v1_merged_upsample_565_internal h2v1_merged_upsample_565_le
+#define h2v1_merged_upsample_565D_internal h2v1_merged_upsample_565D_le
+#define h2v2_merged_upsample_565_internal h2v2_merged_upsample_565_le
+#define h2v2_merged_upsample_565D_internal h2v2_merged_upsample_565D_le
+#include "jdmrg565.c"
+#undef PACK_SHORT_565
+#undef PACK_TWO_PIXELS
+#undef WRITE_TWO_PIXELS
+#undef h2v1_merged_upsample_565_internal
+#undef h2v1_merged_upsample_565D_internal
+#undef h2v2_merged_upsample_565_internal
+#undef h2v2_merged_upsample_565D_internal
+
+#define PACK_SHORT_565 PACK_SHORT_565_BE
+#define PACK_TWO_PIXELS PACK_TWO_PIXELS_BE
+#define WRITE_TWO_PIXELS WRITE_TWO_PIXELS_BE
+#define h2v1_merged_upsample_565_internal h2v1_merged_upsample_565_be
+#define h2v1_merged_upsample_565D_internal h2v1_merged_upsample_565D_be
+#define h2v2_merged_upsample_565_internal h2v2_merged_upsample_565_be
+#define h2v2_merged_upsample_565D_internal h2v2_merged_upsample_565D_be
+#include "jdmrg565.c"
+#undef PACK_SHORT_565
+#undef PACK_TWO_PIXELS
+#undef WRITE_TWO_PIXELS
+#undef h2v1_merged_upsample_565_internal
+#undef h2v1_merged_upsample_565D_internal
+#undef h2v2_merged_upsample_565_internal
+#undef h2v2_merged_upsample_565D_internal
+
+
+static INLINE boolean is_big_endian(void)
+{
+ int test_value = 1;
+ if (*(char *)&test_value != 1)
+ return TRUE;
+ return FALSE;
+}
+
+
+METHODDEF(void)
+h2v1_merged_upsample_565(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
+{
+ if (is_big_endian())
+ h2v1_merged_upsample_565_be(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ else
+ h2v1_merged_upsample_565_le(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+}
+
+
+METHODDEF(void)
+h2v1_merged_upsample_565D(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
+{
+ if (is_big_endian())
+ h2v1_merged_upsample_565D_be(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ else
+ h2v1_merged_upsample_565D_le(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+}
+
+
+METHODDEF(void)
+h2v2_merged_upsample_565(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
+{
+ if (is_big_endian())
+ h2v2_merged_upsample_565_be(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ else
+ h2v2_merged_upsample_565_le(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+}
+
+
+METHODDEF(void)
+h2v2_merged_upsample_565D(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
+ JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
+{
+ if (is_big_endian())
+ h2v2_merged_upsample_565D_be(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+ else
+ h2v2_merged_upsample_565D_le(cinfo, input_buf, in_row_group_ctr,
+ output_buf);
+}
+
+
+/*
+ * 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_merged_upsample_ptr upsample;
+
+ upsample = (my_merged_upsample_ptr)
+ (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
+ sizeof(my_merged_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;
+ if (jsimd_can_h2v2_merged_upsample())
+ upsample->upmethod = jsimd_h2v2_merged_upsample;
+ else
+ upsample->upmethod = h2v2_merged_upsample;
+ if (cinfo->out_color_space == JCS_RGB565) {
+ if (cinfo->dither_mode != JDITHER_NONE) {
+ upsample->upmethod = h2v2_merged_upsample_565D;
+ } else {
+ upsample->upmethod = h2v2_merged_upsample_565;
+ }
+ }
+ /* 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;
+ if (jsimd_can_h2v1_merged_upsample())
+ upsample->upmethod = jsimd_h2v1_merged_upsample;
+ else
+ upsample->upmethod = h2v1_merged_upsample;
+ if (cinfo->out_color_space == JCS_RGB565) {
+ if (cinfo->dither_mode != JDITHER_NONE) {
+ upsample->upmethod = h2v1_merged_upsample_565D;
+ } else {
+ upsample->upmethod = h2v1_merged_upsample_565;
+ }
+ }
+ /* No spare row needed */
+ upsample->spare_row = NULL;
+ }
+
+ build_ycc_rgb_table(cinfo);
+}
+
+#endif /* UPSAMPLE_MERGING_SUPPORTED */