yuv2rgb_bfin.c
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1 /*
2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
3  *
4  * Blackfin video color space converter operations
5  * convert I420 YV12 to RGB in various formats
6  *
7  * This file is part of Libav.
8  *
9  * Libav is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * Libav is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with Libav; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <inttypes.h>
28 #include <assert.h>
29 #include "config.h"
30 #include <unistd.h>
31 #include "libswscale/rgb2rgb.h"
32 #include "libswscale/swscale.h"
34 
35 #if defined(__FDPIC__) && CONFIG_SRAM
36 #define L1CODE __attribute__ ((l1_text))
37 #else
38 #define L1CODE
39 #endif
40 
41 void ff_bfin_yuv2rgb555_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
42  int w, uint32_t *coeffs) L1CODE;
43 
44 void ff_bfin_yuv2rgb565_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
45  int w, uint32_t *coeffs) L1CODE;
46 
47 void ff_bfin_yuv2rgb24_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
48  int w, uint32_t *coeffs) L1CODE;
49 
50 typedef void (* ltransform)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
51  int w, uint32_t *coeffs);
52 
53 
54 static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
55 {
56  int oy;
57  oy = c->yOffset&0xffff;
58  oy = oy >> 3; // keep everything U8.0 for offset calculation
59 
60  c->oc = 128*0x01010101U;
61  c->oy = oy*0x01010101U;
62 
63  /* copy 64bit vector coeffs down to 32bit vector coeffs */
64  c->cy = c->yCoeff;
65  c->zero = 0;
66 
67  if (rgb) {
68  c->crv = c->vrCoeff;
69  c->cbu = c->ubCoeff;
70  c->cgu = c->ugCoeff;
71  c->cgv = c->vgCoeff;
72  } else {
73  c->crv = c->ubCoeff;
74  c->cbu = c->vrCoeff;
75  c->cgu = c->vgCoeff;
76  c->cgv = c->ugCoeff;
77  }
78 
79 
80  if (masks == 555) {
81  c->rmask = 0x001f * 0x00010001U;
82  c->gmask = 0x03e0 * 0x00010001U;
83  c->bmask = 0x7c00 * 0x00010001U;
84  } else if (masks == 565) {
85  c->rmask = 0x001f * 0x00010001U;
86  c->gmask = 0x07e0 * 0x00010001U;
87  c->bmask = 0xf800 * 0x00010001U;
88  }
89 }
90 
92  uint8_t **in, int *instrides,
93  int srcSliceY, int srcSliceH,
94  uint8_t **oplanes, int *outstrides,
95  ltransform lcscf, int rgb, int masks)
96 {
97  uint8_t *py,*pu,*pv,*op;
98  int w = instrides[0];
99  int h2 = srcSliceH>>1;
100  int i;
101 
102  bfin_prepare_coefficients(c, rgb, masks);
103 
104  py = in[0];
105  pu = in[1+(1^rgb)];
106  pv = in[1+(0^rgb)];
107 
108  op = oplanes[0] + srcSliceY*outstrides[0];
109 
110  for (i=0;i<h2;i++) {
111 
112  lcscf(py, pu, pv, op, w, &c->oy);
113 
114  py += instrides[0];
115  op += outstrides[0];
116 
117  lcscf(py, pu, pv, op, w, &c->oy);
118 
119  py += instrides[0];
120  pu += instrides[1];
121  pv += instrides[2];
122  op += outstrides[0];
123  }
124 
125  return srcSliceH;
126 }
127 
128 
130  uint8_t **in, int *instrides,
131  int srcSliceY, int srcSliceH,
132  uint8_t **oplanes, int *outstrides)
133 {
134  return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
135  outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
136 }
137 
139  uint8_t **in, int *instrides,
140  int srcSliceY, int srcSliceH,
141  uint8_t **oplanes, int *outstrides)
142 {
143  return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
144  outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
145 }
146 
148  uint8_t **in, int *instrides,
149  int srcSliceY, int srcSliceH,
150  uint8_t **oplanes, int *outstrides)
151 {
152  return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
153  outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
154 }
155 
157  uint8_t **in, int *instrides,
158  int srcSliceY, int srcSliceH,
159  uint8_t **oplanes, int *outstrides)
160 {
161  return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
162  outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
163 }
164 
166  uint8_t **in, int *instrides,
167  int srcSliceY, int srcSliceH,
168  uint8_t **oplanes, int *outstrides)
169 {
170  return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
171  outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
172 }
173 
175  uint8_t **in, int *instrides,
176  int srcSliceY, int srcSliceH,
177  uint8_t **oplanes, int *outstrides)
178 {
179  return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
180  outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
181 }
182 
183 
185 {
186  SwsFunc f;
187 
188  switch(c->dstFormat) {
189  case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
190  case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
191  case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
192  case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
193  case PIX_FMT_RGB24: f = bfin_yuv420_rgb24; break;
194  case PIX_FMT_BGR24: f = bfin_yuv420_bgr24; break;
195  default:
196  return 0;
197  }
198 
199  av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
201 
202  return f;
203 }