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libswscale/bfin/yuv2rgb_bfin.c

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00001 /*
00002  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
00003  *
00004  * Blackfin video color space converter operations
00005  * convert I420 YV12 to RGB in various formats
00006  *
00007  * This file is part of FFmpeg.
00008  *
00009  * FFmpeg is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * FFmpeg is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with FFmpeg; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00022  */
00023 
00024 #include <stdio.h>
00025 #include <stdlib.h>
00026 #include <string.h>
00027 #include <inttypes.h>
00028 #include <assert.h>
00029 #include "config.h"
00030 #include <unistd.h>
00031 #include "libswscale/rgb2rgb.h"
00032 #include "libswscale/swscale.h"
00033 #include "libswscale/swscale_internal.h"
00034 
00035 #if defined(__FDPIC__) && CONFIG_SRAM
00036 #define L1CODE __attribute__ ((l1_text))
00037 #else
00038 #define L1CODE
00039 #endif
00040 
00041 void ff_bfin_yuv2rgb555_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
00042                              int w, uint32_t *coeffs) L1CODE;
00043 
00044 void ff_bfin_yuv2rgb565_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
00045                              int w, uint32_t *coeffs) L1CODE;
00046 
00047 void ff_bfin_yuv2rgb24_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
00048                             int w, uint32_t *coeffs) L1CODE;
00049 
00050 typedef void (* ltransform)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
00051                             int w, uint32_t *coeffs);
00052 
00053 
00054 static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
00055 {
00056     int oy;
00057     oy      = c->yOffset&0xffff;
00058     oy      = oy >> 3; // keep everything U8.0 for offset calculation
00059 
00060     c->oc   = 128*0x01010101U;
00061     c->oy   =  oy*0x01010101U;
00062 
00063     /* copy 64bit vector coeffs down to 32bit vector coeffs */
00064     c->cy  = c->yCoeff;
00065     c->zero = 0;
00066 
00067     if (rgb) {
00068         c->crv = c->vrCoeff;
00069         c->cbu = c->ubCoeff;
00070         c->cgu = c->ugCoeff;
00071         c->cgv = c->vgCoeff;
00072     } else {
00073         c->crv = c->ubCoeff;
00074         c->cbu = c->vrCoeff;
00075         c->cgu = c->vgCoeff;
00076         c->cgv = c->ugCoeff;
00077     }
00078 
00079 
00080     if (masks == 555) {
00081         c->rmask = 0x001f * 0x00010001U;
00082         c->gmask = 0x03e0 * 0x00010001U;
00083         c->bmask = 0x7c00 * 0x00010001U;
00084     } else if (masks == 565) {
00085         c->rmask = 0x001f * 0x00010001U;
00086         c->gmask = 0x07e0 * 0x00010001U;
00087         c->bmask = 0xf800 * 0x00010001U;
00088     }
00089 }
00090 
00091 static int core_yuv420_rgb(SwsContext *c,
00092                            uint8_t **in, int *instrides,
00093                            int srcSliceY, int srcSliceH,
00094                            uint8_t **oplanes, int *outstrides,
00095                            ltransform lcscf, int rgb, int masks)
00096 {
00097     uint8_t *py,*pu,*pv,*op;
00098     int w  = instrides[0];
00099     int h2 = srcSliceH>>1;
00100     int i;
00101 
00102     bfin_prepare_coefficients(c, rgb, masks);
00103 
00104     py = in[0];
00105     pu = in[1+(1^rgb)];
00106     pv = in[1+(0^rgb)];
00107 
00108     op = oplanes[0] + srcSliceY*outstrides[0];
00109 
00110     for (i=0;i<h2;i++) {
00111 
00112         lcscf(py, pu, pv, op, w, &c->oy);
00113 
00114         py += instrides[0];
00115         op += outstrides[0];
00116 
00117         lcscf(py, pu, pv, op, w, &c->oy);
00118 
00119         py += instrides[0];
00120         pu += instrides[1];
00121         pv += instrides[2];
00122         op += outstrides[0];
00123     }
00124 
00125     return srcSliceH;
00126 }
00127 
00128 
00129 static int bfin_yuv420_rgb555(SwsContext *c,
00130                               uint8_t **in, int *instrides,
00131                               int srcSliceY, int srcSliceH,
00132                               uint8_t **oplanes, int *outstrides)
00133 {
00134     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
00135                            outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
00136 }
00137 
00138 static int bfin_yuv420_bgr555(SwsContext *c,
00139                               uint8_t **in, int *instrides,
00140                               int srcSliceY, int srcSliceH,
00141                               uint8_t **oplanes, int *outstrides)
00142 {
00143     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
00144                            outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
00145 }
00146 
00147 static int bfin_yuv420_rgb24(SwsContext *c,
00148                              uint8_t **in, int *instrides,
00149                              int srcSliceY, int srcSliceH,
00150                              uint8_t **oplanes, int *outstrides)
00151 {
00152     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
00153                            outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
00154 }
00155 
00156 static int bfin_yuv420_bgr24(SwsContext *c,
00157                              uint8_t **in, int *instrides,
00158                              int srcSliceY, int srcSliceH,
00159                              uint8_t **oplanes, int *outstrides)
00160 {
00161     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
00162                            outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
00163 }
00164 
00165 static int bfin_yuv420_rgb565(SwsContext *c,
00166                               uint8_t **in, int *instrides,
00167                               int srcSliceY, int srcSliceH,
00168                               uint8_t **oplanes, int *outstrides)
00169 {
00170     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
00171                            outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
00172 }
00173 
00174 static int bfin_yuv420_bgr565(SwsContext *c,
00175                               uint8_t **in, int *instrides,
00176                               int srcSliceY, int srcSliceH,
00177                               uint8_t **oplanes, int *outstrides)
00178 {
00179     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
00180                            outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
00181 }
00182 
00183 
00184 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c)
00185 {
00186     SwsFunc f;
00187 
00188     switch(c->dstFormat) {
00189     case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
00190     case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
00191     case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
00192     case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
00193     case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
00194     case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
00195     default:
00196         return 0;
00197     }
00198 
00199     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
00200            sws_format_name (c->dstFormat));
00201 
00202     return f;
00203 }

Generated on Fri Sep 16 2011 17:17:52 for FFmpeg by  doxygen 1.7.1