libswscale/yuv2rgb_bfin.c

   1 /*
   2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
   3  *                    April 20, 2007
   4  *
   5  * Blackfin Video Color Space Converters Operations
   6  *  convert I420 YV12 to RGB in various formats,
   7  *
   8  * This file is part of FFmpeg.
   9  *
  10  * FFmpeg is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * FFmpeg is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with FFmpeg; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <inttypes.h>
  29 #include <assert.h>
  30 #include "config.h"
  31 #ifdef HAVE_MALLOC_H
  32 #include <malloc.h>
  33 #endif
  34 #include <unistd.h>
  35 #include "rgb2rgb.h"
  36 #include "swscale.h"
  37 #include "swscale_internal.h"
  38
  39
  40 #define L1CODE __attribute__ ((l1_text))
  41
  42 extern void ff_bfin_yuv2rgb555_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  43                                      int w, uint32_t *coeffs) L1CODE;
  44
  45 extern void ff_bfin_yuv2rgb565_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  46                                      int w, uint32_t *coeffs) L1CODE;
  47
  48 extern void ff_bfin_yuv2rgb24_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  49                                     int w, uint32_t *coeffs) L1CODE;
  50
  51 typedef void (* ltransform_t)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  52                               int w, uint32_t *coeffs);
  53
  54
  55 static void bfin_prepare_coefficients (SwsContext *c, int rgb, int masks)
  56 {
  57     int oy;
  58     oy      = c->yOffset&0xffff;
  59     oy      = oy >> 3; // keep everything U8.0 for offset calculation
  60
  61     c->oc   = 128*0x01010101U;
  62     c->oy   =  oy*0x01010101U;
  63
  64     /* copy 64bit vector coeffs down to 32bit vector coeffs */
  65     c->cy  = c->yCoeff;
  66     c->zero = 0;
  67
  68     if (rgb) {
  69         c->crv = c->vrCoeff;
  70         c->cbu = c->ubCoeff;
  71         c->cgu = c->ugCoeff;
  72         c->cgv = c->vgCoeff;
  73     } else {
  74         c->crv = c->ubCoeff;
  75         c->cbu = c->vrCoeff;
  76         c->cgu = c->vgCoeff;
  77         c->cgv = c->ugCoeff;
  78     }
  79
  80
  81     if (masks == 555) {
  82         c->rmask = 0x001f * 0x00010001U;
  83         c->gmask = 0x03e0 * 0x00010001U;
  84         c->bmask = 0x7c00 * 0x00010001U;
  85     } else if (masks == 565) {
  86         c->rmask = 0x001f * 0x00010001U;
  87         c->gmask = 0x07e0 * 0x00010001U;
  88         c->bmask = 0xf800 * 0x00010001U;
  89     }
  90 }
  91
  92 static int core_yuv420_rgb (SwsContext *c,
  93                             uint8_t **in, int *instrides,
  94                             int srcSliceY, int srcSliceH,
  95                             uint8_t **oplanes, int *outstrides,
  96                             ltransform_t lcscf, int rgb, int masks)
  97 {
  98     uint8_t *py,*pu,*pv,*op;
  99     int w  = instrides[0];
 100     int h2 = srcSliceH>>1;
 101     int i;
 102
 103     bfin_prepare_coefficients (c, rgb, masks);
 104
 105     py = in[0];
 106     pu = in[1+(1^rgb)];
 107     pv = in[1+(0^rgb)];
 108
 109     op = oplanes[0] + srcSliceY*outstrides[0];
 110
 111     for (i=0;i<h2;i++) {
 112
 113         lcscf (py,pu,pv,op,w,&c->oy);
 114
 115         py += instrides[0];
 116         op += outstrides[0];
 117
 118         lcscf (py,pu,pv,op,w,&c->oy);
 119
 120         py += instrides[0];
 121         pu += instrides[1];
 122         pv += instrides[2];
 123         op += outstrides[0];
 124     }
 125
 126     return srcSliceH;
 127 }
 128
 129
 130 static int bfin_yuv420_rgb555 (SwsContext *c,
 131                                uint8_t **in, int *instrides,
 132                                int srcSliceY, int srcSliceH,
 133                                uint8_t **oplanes, int *outstrides)
 134 {
 135     return core_yuv420_rgb (c,in,instrides,srcSliceY,srcSliceH,oplanes,outstrides,
 136                             ff_bfin_yuv2rgb555_line, 1, 555);
 137 }
 138
 139 static int bfin_yuv420_bgr555 (SwsContext *c,
 140                                uint8_t **in, int *instrides,
 141                                int srcSliceY, int srcSliceH,
 142                                uint8_t **oplanes, int *outstrides)
 143 {
 144     return core_yuv420_rgb (c,in,instrides,srcSliceY,srcSliceH,oplanes,outstrides,
 145                             ff_bfin_yuv2rgb555_line, 0, 555);
 146 }
 147
 148 static int bfin_yuv420_rgb24 (SwsContext *c,
 149                               uint8_t **in, int *instrides,
 150                               int srcSliceY, int srcSliceH,
 151                               uint8_t **oplanes, int *outstrides)
 152 {
 153     return core_yuv420_rgb (c,in,instrides,srcSliceY,srcSliceH,oplanes,outstrides,
 154                             ff_bfin_yuv2rgb24_line, 1, 888);
 155 }
 156
 157 static int bfin_yuv420_bgr24 (SwsContext *c,
 158                               uint8_t **in, int *instrides,
 159                               int srcSliceY, int srcSliceH,
 160                               uint8_t **oplanes, int *outstrides)
 161 {
 162     return core_yuv420_rgb (c,in,instrides,srcSliceY,srcSliceH,oplanes,outstrides,
 163                             ff_bfin_yuv2rgb24_line, 0, 888);
 164 }
 165
 166 static int bfin_yuv420_rgb565 (SwsContext *c,
 167                                uint8_t **in, int *instrides,
 168                                int srcSliceY, int srcSliceH,
 169                                uint8_t **oplanes, int *outstrides)
 170 {
 171     return core_yuv420_rgb (c,in,instrides,srcSliceY,srcSliceH,oplanes,outstrides,
 172                             ff_bfin_yuv2rgb565_line, 1, 565);
 173 }
 174
 175 static int bfin_yuv420_bgr565 (SwsContext *c,
 176                                uint8_t **in, int *instrides,
 177                                int srcSliceY, int srcSliceH,
 178                                uint8_t **oplanes, int *outstrides)
 179 {
 180     return core_yuv420_rgb (c,in,instrides,srcSliceY,srcSliceH,oplanes,outstrides,
 181                             ff_bfin_yuv2rgb565_line, 0, 565);
 182 }
 183
 184
 185 SwsFunc ff_bfin_yuv2rgb_get_func_ptr (SwsContext *c)
 186 {
 187     SwsFunc f;
 188
 189     switch(c->dstFormat) {
 190     case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
 191     case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
 192     case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
 193     case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
 194     case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
 195     case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
 196     default:
 197         return 0;
 198     }
 199
 200     av_log(c, AV_LOG_INFO, "BlackFin Accelerated Color Space Converter %s\n",
 201            sws_format_name (c->dstFormat));
 202
 203     return f;
 204 }