/src/libjpeg-turbo.dev/src/jdmrgext.c

Source
/*
 * jdmrgext.c
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1994-1996, Thomas G. Lane.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2011, 2015, 2020, 2022-2023, 2025, D. R. Commander.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains code for merged upsampling/color conversion.
 */


/* This file is included by jdmerge.c */


/*
 * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
 */

INLINE
LOCAL(void)
h2v1_merged_upsample(j_decompress_ptr cinfo, _JSAMPIMAGE input_buf,
                     JDIMENSION in_row_group_ctr, _JSAMPARRAY output_buf)
{
  my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
  register int y, cred, cgreen, cblue;
  int cb, cr;
  register _JSAMPROW outptr;
  _JSAMPROW inptr0, inptr1, inptr2;
  JDIMENSION col;
  /* copy these pointers into registers if possible */
  register _JSAMPLE *range_limit = (_JSAMPLE *)cinfo->sample_range_limit;
  int *Crrtab = upsample->Cr_r_tab;
  int *Cbbtab = upsample->Cb_b_tab;
  JLONG *Crgtab = upsample->Cr_g_tab;
  JLONG *Cbgtab = upsample->Cb_g_tab;
  SHIFT_TEMPS

  inptr0 = input_buf[0][in_row_group_ctr];
  inptr1 = input_buf[1][in_row_group_ctr];
  inptr2 = input_buf[2][in_row_group_ctr];
  outptr = output_buf[0];
  /* Loop for each pair of output pixels */
  for (col = cinfo->output_width >> 1; col > 0; col--) {
    /* Do the chroma part of the calculation */
    cb = *inptr1++;
    cr = *inptr2++;
    cred = Crrtab[cr];
    cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
    cblue = Cbbtab[cb];
    /* Fetch 2 Y values and emit 2 pixels */
    y  = *inptr0++;
    outptr[RGB_RED] =   range_limit[y + cred];
    outptr[RGB_GREEN] = range_limit[y + cgreen];
    outptr[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    outptr += RGB_PIXELSIZE;
    y  = *inptr0++;
    outptr[RGB_RED] =   range_limit[y + cred];
    outptr[RGB_GREEN] = range_limit[y + cgreen];
    outptr[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    outptr += RGB_PIXELSIZE;
  }
  /* If image width is odd, do the last output column separately */
  if (cinfo->output_width & 1) {
    cb = *inptr1;
    cr = *inptr2;
    cred = Crrtab[cr];
    cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
    cblue = Cbbtab[cb];
    y  = *inptr0;
    outptr[RGB_RED] =   range_limit[y + cred];
    outptr[RGB_GREEN] = range_limit[y + cgreen];
    outptr[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr[RGB_ALPHA] = _MAXJSAMPLE;
#endif
  }
}


/*
 * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
 */

INLINE
LOCAL(void)
h2v2_merged_upsample(j_decompress_ptr cinfo, _JSAMPIMAGE input_buf,
                     JDIMENSION in_row_group_ctr, _JSAMPARRAY output_buf)
{
  my_merged_upsample_ptr upsample = (my_merged_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 = (_JSAMPLE *)cinfo->sample_range_limit;
  int *Crrtab = upsample->Cr_r_tab;
  int *Cbbtab = upsample->Cb_b_tab;
  JLONG *Crgtab = upsample->Cr_g_tab;
  JLONG *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 = *inptr1++;
    cr = *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  = *inptr00++;
    outptr0[RGB_RED] =   range_limit[y + cred];
    outptr0[RGB_GREEN] = range_limit[y + cgreen];
    outptr0[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr0[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    outptr0 += RGB_PIXELSIZE;
    y  = *inptr00++;
    outptr0[RGB_RED] =   range_limit[y + cred];
    outptr0[RGB_GREEN] = range_limit[y + cgreen];
    outptr0[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr0[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    outptr0 += RGB_PIXELSIZE;
    y  = *inptr01++;
    outptr1[RGB_RED] =   range_limit[y + cred];
    outptr1[RGB_GREEN] = range_limit[y + cgreen];
    outptr1[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr1[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    outptr1 += RGB_PIXELSIZE;
    y  = *inptr01++;
    outptr1[RGB_RED] =   range_limit[y + cred];
    outptr1[RGB_GREEN] = range_limit[y + cgreen];
    outptr1[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr1[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    outptr1 += RGB_PIXELSIZE;
  }
  /* If image width is odd, do the last output column separately */
  if (cinfo->output_width & 1) {
    cb = *inptr1;
    cr = *inptr2;
    cred = Crrtab[cr];
    cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
    cblue = Cbbtab[cb];
    y  = *inptr00;
    outptr0[RGB_RED] =   range_limit[y + cred];
    outptr0[RGB_GREEN] = range_limit[y + cgreen];
    outptr0[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr0[RGB_ALPHA] = _MAXJSAMPLE;
#endif
    y  = *inptr01;
    outptr1[RGB_RED] =   range_limit[y + cred];
    outptr1[RGB_GREEN] = range_limit[y + cgreen];
    outptr1[RGB_BLUE] =  range_limit[y + cblue];
#ifdef RGB_ALPHA
    outptr1[RGB_ALPHA] = _MAXJSAMPLE;
#endif
  }
}

Coverage Report

Created: 2025-10-13 06:04

Line	Count	Source
1		/*
2		* jdmrgext.c
3		*
4		* This file was part of the Independent JPEG Group's software:
5		* Copyright (C) 1994-1996, Thomas G. Lane.
6		* libjpeg-turbo Modifications:
7		* Copyright (C) 2011, 2015, 2020, 2022-2023, 2025, D. R. Commander.
8		* For conditions of distribution and use, see the accompanying README.ijg
9		* file.
10		*
11		* This file contains code for merged upsampling/color conversion.
12		*/
13
14
15		/* This file is included by jdmerge.c */
16
17
18		/*
19		* Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
20		*/
21
22		INLINE
23		LOCAL(void)
24		h2v1_merged_upsample(j_decompress_ptr cinfo, _JSAMPIMAGE input_buf,
25		JDIMENSION in_row_group_ctr, _JSAMPARRAY output_buf)
26	0	{
27	0	my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
28	0	register int y, cred, cgreen, cblue;
29	0	int cb, cr;
30	0	register _JSAMPROW outptr;
31	0	_JSAMPROW inptr0, inptr1, inptr2;
32	0	JDIMENSION col;
33		/* copy these pointers into registers if possible */
34	0	register _JSAMPLE range_limit = (_JSAMPLE )cinfo->sample_range_limit;
35	0	int *Crrtab = upsample->Cr_r_tab;
36	0	int *Cbbtab = upsample->Cb_b_tab;
37	0	JLONG *Crgtab = upsample->Cr_g_tab;
38	0	JLONG *Cbgtab = upsample->Cb_g_tab;
39	0	SHIFT_TEMPS
40
41	0	inptr0 = input_buf[0][in_row_group_ctr];
42	0	inptr1 = input_buf[1][in_row_group_ctr];
43	0	inptr2 = input_buf[2][in_row_group_ctr];
44	0	outptr = output_buf[0];
45		/* Loop for each pair of output pixels */
46	0	for (col = cinfo->output_width >> 1; col > 0; col--) {
47		/* Do the chroma part of the calculation */
48	0	cb = *inptr1++;
49	0	cr = *inptr2++;
50	0	cred = Crrtab[cr];
51	0	cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
52	0	cblue = Cbbtab[cb];
53		/* Fetch 2 Y values and emit 2 pixels */
54	0	y = *inptr0++;
55	0	outptr[RGB_RED] = range_limit[y + cred];
56	0	outptr[RGB_GREEN] = range_limit[y + cgreen];
57	0	outptr[RGB_BLUE] = range_limit[y + cblue];
58		#ifdef RGB_ALPHA
59	0	outptr[RGB_ALPHA] = _MAXJSAMPLE;
60		#endif
61	0	outptr += RGB_PIXELSIZE;
62	0	y = *inptr0++;
63	0	outptr[RGB_RED] = range_limit[y + cred];
64	0	outptr[RGB_GREEN] = range_limit[y + cgreen];
65	0	outptr[RGB_BLUE] = range_limit[y + cblue];
66		#ifdef RGB_ALPHA
67	0	outptr[RGB_ALPHA] = _MAXJSAMPLE;
68		#endif
69	0	outptr += RGB_PIXELSIZE;
70	0	}
71		/* If image width is odd, do the last output column separately */
72	0	if (cinfo->output_width & 1) {
73	0	cb = *inptr1;
74	0	cr = *inptr2;
75	0	cred = Crrtab[cr];
76	0	cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
77	0	cblue = Cbbtab[cb];
78	0	y = *inptr0;
79	0	outptr[RGB_RED] = range_limit[y + cred];
80	0	outptr[RGB_GREEN] = range_limit[y + cgreen];
81	0	outptr[RGB_BLUE] = range_limit[y + cblue];
82		#ifdef RGB_ALPHA
83	0	outptr[RGB_ALPHA] = _MAXJSAMPLE;
84		#endif
85	0	}
86	0	} Unexecuted instantiation: jdmerge-8.c:extrgb_h2v1_merged_upsample Unexecuted instantiation: jdmerge-8.c:extrgbx_h2v1_merged_upsample Unexecuted instantiation: jdmerge-8.c:extbgr_h2v1_merged_upsample Unexecuted instantiation: jdmerge-8.c:extbgrx_h2v1_merged_upsample Unexecuted instantiation: jdmerge-8.c:extxbgr_h2v1_merged_upsample Unexecuted instantiation: jdmerge-8.c:extxrgb_h2v1_merged_upsample Unexecuted instantiation: jdmerge-8.c:h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:extrgb_h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:extrgbx_h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:extbgr_h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:extbgrx_h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:extxbgr_h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:extxrgb_h2v1_merged_upsample Unexecuted instantiation: jdmerge-12.c:h2v1_merged_upsample
87
88
89		/*
90		* Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
91		*/
92
93		INLINE
94		LOCAL(void)
95		h2v2_merged_upsample(j_decompress_ptr cinfo, _JSAMPIMAGE input_buf,
96		JDIMENSION in_row_group_ctr, _JSAMPARRAY output_buf)
97	0	{
98	0	my_merged_upsample_ptr upsample = (my_merged_upsample_ptr)cinfo->upsample;
99	0	register int y, cred, cgreen, cblue;
100	0	int cb, cr;
101	0	register _JSAMPROW outptr0, outptr1;
102	0	_JSAMPROW inptr00, inptr01, inptr1, inptr2;
103	0	JDIMENSION col;
104		/* copy these pointers into registers if possible */
105	0	register _JSAMPLE range_limit = (_JSAMPLE )cinfo->sample_range_limit;
106	0	int *Crrtab = upsample->Cr_r_tab;
107	0	int *Cbbtab = upsample->Cb_b_tab;
108	0	JLONG *Crgtab = upsample->Cr_g_tab;
109	0	JLONG *Cbgtab = upsample->Cb_g_tab;
110	0	SHIFT_TEMPS
111
112	0	inptr00 = input_buf[0][in_row_group_ctr * 2];
113	0	inptr01 = input_buf[0][in_row_group_ctr * 2 + 1];
114	0	inptr1 = input_buf[1][in_row_group_ctr];
115	0	inptr2 = input_buf[2][in_row_group_ctr];
116	0	outptr0 = output_buf[0];
117	0	outptr1 = output_buf[1];
118		/* Loop for each group of output pixels */
119	0	for (col = cinfo->output_width >> 1; col > 0; col--) {
120		/* Do the chroma part of the calculation */
121	0	cb = *inptr1++;
122	0	cr = *inptr2++;
123	0	cred = Crrtab[cr];
124	0	cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
125	0	cblue = Cbbtab[cb];
126		/* Fetch 4 Y values and emit 4 pixels */
127	0	y = *inptr00++;
128	0	outptr0[RGB_RED] = range_limit[y + cred];
129	0	outptr0[RGB_GREEN] = range_limit[y + cgreen];
130	0	outptr0[RGB_BLUE] = range_limit[y + cblue];
131		#ifdef RGB_ALPHA
132	0	outptr0[RGB_ALPHA] = _MAXJSAMPLE;
133		#endif
134	0	outptr0 += RGB_PIXELSIZE;
135	0	y = *inptr00++;
136	0	outptr0[RGB_RED] = range_limit[y + cred];
137	0	outptr0[RGB_GREEN] = range_limit[y + cgreen];
138	0	outptr0[RGB_BLUE] = range_limit[y + cblue];
139		#ifdef RGB_ALPHA
140	0	outptr0[RGB_ALPHA] = _MAXJSAMPLE;
141		#endif
142	0	outptr0 += RGB_PIXELSIZE;
143	0	y = *inptr01++;
144	0	outptr1[RGB_RED] = range_limit[y + cred];
145	0	outptr1[RGB_GREEN] = range_limit[y + cgreen];
146	0	outptr1[RGB_BLUE] = range_limit[y + cblue];
147		#ifdef RGB_ALPHA
148	0	outptr1[RGB_ALPHA] = _MAXJSAMPLE;
149		#endif
150	0	outptr1 += RGB_PIXELSIZE;
151	0	y = *inptr01++;
152	0	outptr1[RGB_RED] = range_limit[y + cred];
153	0	outptr1[RGB_GREEN] = range_limit[y + cgreen];
154	0	outptr1[RGB_BLUE] = range_limit[y + cblue];
155		#ifdef RGB_ALPHA
156	0	outptr1[RGB_ALPHA] = _MAXJSAMPLE;
157		#endif
158	0	outptr1 += RGB_PIXELSIZE;
159	0	}
160		/* If image width is odd, do the last output column separately */
161	0	if (cinfo->output_width & 1) {
162	0	cb = *inptr1;
163	0	cr = *inptr2;
164	0	cred = Crrtab[cr];
165	0	cgreen = (int)RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
166	0	cblue = Cbbtab[cb];
167	0	y = *inptr00;
168	0	outptr0[RGB_RED] = range_limit[y + cred];
169	0	outptr0[RGB_GREEN] = range_limit[y + cgreen];
170	0	outptr0[RGB_BLUE] = range_limit[y + cblue];
171		#ifdef RGB_ALPHA
172	0	outptr0[RGB_ALPHA] = _MAXJSAMPLE;
173		#endif
174	0	y = *inptr01;
175	0	outptr1[RGB_RED] = range_limit[y + cred];
176	0	outptr1[RGB_GREEN] = range_limit[y + cgreen];
177	0	outptr1[RGB_BLUE] = range_limit[y + cblue];
178		#ifdef RGB_ALPHA
179	0	outptr1[RGB_ALPHA] = _MAXJSAMPLE;
180		#endif
181	0	}
182	0	} Unexecuted instantiation: jdmerge-8.c:extrgb_h2v2_merged_upsample Unexecuted instantiation: jdmerge-8.c:extrgbx_h2v2_merged_upsample Unexecuted instantiation: jdmerge-8.c:extbgr_h2v2_merged_upsample Unexecuted instantiation: jdmerge-8.c:extbgrx_h2v2_merged_upsample Unexecuted instantiation: jdmerge-8.c:extxbgr_h2v2_merged_upsample Unexecuted instantiation: jdmerge-8.c:extxrgb_h2v2_merged_upsample Unexecuted instantiation: jdmerge-8.c:h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:extrgb_h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:extrgbx_h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:extbgr_h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:extbgrx_h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:extxbgr_h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:extxrgb_h2v2_merged_upsample Unexecuted instantiation: jdmerge-12.c:h2v2_merged_upsample