libswscale/swscale_bfin.c

   1 /*
   2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
   3  *
   4  * Blackfin software video scaler operations
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <inttypes.h>
  27 #include <assert.h>
  28 #include "config.h"
  29 #include <unistd.h>
  30 #include "rgb2rgb.h"
  31 #include "swscale.h"
  32 #include "swscale_internal.h"
  33
  34 #ifdef __FDPIC__
  35 #define L1CODE __attribute__ ((l1_text))
  36 #else
  37 #define L1CODE
  38 #endif
  39
  40 int ff_bfin_uyvytoyv12 (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
  41                         long width, long height,
  42                         long lumStride, long chromStride, long srcStride) L1CODE;
  43
  44 int ff_bfin_yuyvtoyv12 (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
  45                         long width, long height,
  46                         long lumStride, long chromStride, long srcStride) L1CODE;
  47
  48 static int uyvytoyv12_unscaled (SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
  49                                 int srcSliceH, uint8_t* dst[], int dstStride[])
  50 {
  51     uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
  52     uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
  53     uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
  54     uint8_t *ip   = src[0] + srcStride[0]*srcSliceY;
  55     int w         = dstStride[0];
  56
  57     ff_bfin_uyvytoyv12 (ip, dsty, dstu, dstv, w, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
  58
  59     return srcSliceH;
  60 }
  61
  62 static int yuyvtoyv12_unscaled (SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
  63                                 int srcSliceH, uint8_t* dst[], int dstStride[])
  64 {
  65     uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
  66     uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
  67     uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
  68     uint8_t *ip   = src[0] + srcStride[0]*srcSliceY;
  69     int w         = dstStride[0];
  70
  71     ff_bfin_yuyvtoyv12 (ip, dsty, dstu, dstv, w, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
  72
  73     return srcSliceH;
  74 }
  75
  76
  77 void ff_bfin_get_unscaled_swscale (SwsContext *c)
  78 {
  79     SwsFunc swScale = c->swScale;
  80     if (c->flags & SWS_CPU_CAPS_BFIN)
  81         if (c->dstFormat == PIX_FMT_YUV420P)
  82             if (c->srcFormat == PIX_FMT_UYVY422) {
  83                 av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized uyvytoyv12_unscaled\n");
  84                 c->swScale = uyvytoyv12_unscaled;
  85             }
  86         if (c->dstFormat == PIX_FMT_YUV420P)
  87             if (c->srcFormat == PIX_FMT_YUYV422) {
  88                 av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized yuyvtoyv12_unscaled\n");
  89                 c->swScale = yuyvtoyv12_unscaled;
  90             }
  91 }