git.sesse.net Git - ffmpeg/blob - libswscale/yuv2rgb_bfin.c

   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 FFmpeg.
   8  *
   9  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 #ifdef HAVE_MALLOC_H
  31 #include <malloc.h>
  32 #endif
  33 #include <unistd.h>
  34 #include "rgb2rgb.h"
  35 #include "swscale.h"
  36 #include "swscale_internal.h"
  37
  38 #ifdef __FDPIC__
  39 #define L1CODE __attribute__ ((l1_text))
  40 #else
  41 #define L1CODE
  42 #endif
  43
  44 extern void ff_bfin_yuv2rgb555_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  45                                      int w, uint32_t *coeffs) L1CODE;
  46
  47 extern void ff_bfin_yuv2rgb565_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  48                                      int w, uint32_t *coeffs) L1CODE;
  49
  50 extern void ff_bfin_yuv2rgb24_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  51                                     int w, uint32_t *coeffs) L1CODE;
  52
  53 typedef void (* ltransform_t)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  54                               int w, uint32_t *coeffs);
  55
  56
  57 static void bfin_prepare_coefficients (SwsContext *c, int rgb, int masks)
  58 {
  59     int oy;
  60     oy      = c->yOffset&0xffff;
  61     oy      = oy >> 3; // keep everything U8.0 for offset calculation
  62
  63     c->oc   = 128*0x01010101U;
  64     c->oy   =  oy*0x01010101U;
  65
  66     /* copy 64bit vector coeffs down to 32bit vector coeffs */
  67     c->cy  = c->yCoeff;
  68     c->zero = 0;
  69
  70     if (rgb) {
  71         c->crv = c->vrCoeff;
  72         c->cbu = c->ubCoeff;
  73         c->cgu = c->ugCoeff;
  74         c->cgv = c->vgCoeff;
  75     } else {
  76         c->crv = c->ubCoeff;
  77         c->cbu = c->vrCoeff;
  78         c->cgu = c->vgCoeff;
  79         c->cgv = c->ugCoeff;
  80     }
  81
  82
  83     if (masks == 555) {
  84         c->rmask = 0x001f * 0x00010001U;
  85         c->gmask = 0x03e0 * 0x00010001U;
  86         c->bmask = 0x7c00 * 0x00010001U;
  87     } else if (masks == 565) {
  88         c->rmask = 0x001f * 0x00010001U;
  89         c->gmask = 0x07e0 * 0x00010001U;
  90         c->bmask = 0xf800 * 0x00010001U;
  91     }
  92 }
  93
  94 static int core_yuv420_rgb (SwsContext *c,
  95                             uint8_t **in, int *instrides,
  96                             int srcSliceY, int srcSliceH,
  97                             uint8_t **oplanes, int *outstrides,
  98                             ltransform_t lcscf, int rgb, int masks)
  99 {
 100     uint8_t *py,*pu,*pv,*op;
 101     int w  = instrides[0];
 102     int h2 = srcSliceH>>1;
 103     int i;
 104
 105     bfin_prepare_coefficients (c, rgb, masks);
 106
 107     py = in[0];
 108     pu = in[1+(1^rgb)];
 109     pv = in[1+(0^rgb)];
 110
 111     op = oplanes[0] + srcSliceY*outstrides[0];
 112
 113     for (i=0;i<h2;i++) {
 114
 115         lcscf (py, pu, pv, op, w, &c->oy);
 116
 117         py += instrides[0];
 118         op += outstrides[0];
 119
 120         lcscf (py, pu, pv, op, w, &c->oy);
 121
 122         py += instrides[0];
 123         pu += instrides[1];
 124         pv += instrides[2];
 125         op += outstrides[0];
 126     }
 127
 128     return srcSliceH;
 129 }
 130
 131
 132 static int bfin_yuv420_rgb555 (SwsContext *c,
 133                                uint8_t **in, int *instrides,
 134                                int srcSliceY, int srcSliceH,
 135                                uint8_t **oplanes, int *outstrides)
 136 {
 137     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
 138                             ff_bfin_yuv2rgb555_line, 1, 555);
 139 }
 140
 141 static int bfin_yuv420_bgr555 (SwsContext *c,
 142                                uint8_t **in, int *instrides,
 143                                int srcSliceY, int srcSliceH,
 144                                uint8_t **oplanes, int *outstrides)
 145 {
 146     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
 147                             ff_bfin_yuv2rgb555_line, 0, 555);
 148 }
 149
 150 static int bfin_yuv420_rgb24 (SwsContext *c,
 151                               uint8_t **in, int *instrides,
 152                               int srcSliceY, int srcSliceH,
 153                               uint8_t **oplanes, int *outstrides)
 154 {
 155     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
 156                             ff_bfin_yuv2rgb24_line, 1, 888);
 157 }
 158
 159 static int bfin_yuv420_bgr24 (SwsContext *c,
 160                               uint8_t **in, int *instrides,
 161                               int srcSliceY, int srcSliceH,
 162                               uint8_t **oplanes, int *outstrides)
 163 {
 164     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
 165                             ff_bfin_yuv2rgb24_line, 0, 888);
 166 }
 167
 168 static int bfin_yuv420_rgb565 (SwsContext *c,
 169                                uint8_t **in, int *instrides,
 170                                int srcSliceY, int srcSliceH,
 171                                uint8_t **oplanes, int *outstrides)
 172 {
 173     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
 174                             ff_bfin_yuv2rgb565_line, 1, 565);
 175 }
 176
 177 static int bfin_yuv420_bgr565 (SwsContext *c,
 178                                uint8_t **in, int *instrides,
 179                                int srcSliceY, int srcSliceH,
 180                                uint8_t **oplanes, int *outstrides)
 181 {
 182     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
 183                             ff_bfin_yuv2rgb565_line, 0, 565);
 184 }
 185
 186
 187 SwsFunc ff_bfin_yuv2rgb_get_func_ptr (SwsContext *c)
 188 {
 189     SwsFunc f;
 190
 191     switch(c->dstFormat) {
 192     case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
 193     case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
 194     case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
 195     case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
 196     case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
 197     case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
 198     default:
 199         return 0;
 200     }
 201
 202     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
 203            sws_format_name (c->dstFormat));
 204
 205     return f;
 206 }