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  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 <stdint.h>
  24.  
  25. #include "config.h"
  26. #include "libavutil/attributes.h"
  27. #include "libswscale/swscale_internal.h"
  28.  
  29. #if defined (__FDPIC__) && CONFIG_SRAM
  30. #define L1CODE __attribute__((l1_text))
  31. #else
  32. #define L1CODE
  33. #endif
  34.  
  35. int ff_bfin_uyvytoyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst,
  36.                        uint8_t *vdst, int width, int height,
  37.                        int lumStride, int chromStride, int srcStride) L1CODE;
  38.  
  39. int ff_bfin_yuyvtoyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst,
  40.                        uint8_t *vdst, int width, int height,
  41.                        int lumStride, int chromStride, int srcStride) L1CODE;
  42.  
  43. static int uyvytoyv12_unscaled(SwsContext *c, const uint8_t *src[],
  44.                                int srcStride[], int srcSliceY, int srcSliceH,
  45.                                uint8_t *dst[], int dstStride[])
  46. {
  47.     uint8_t *dsty = dst[0] + dstStride[0] * srcSliceY;
  48.     uint8_t *dstu = dst[1] + dstStride[1] * srcSliceY / 2;
  49.     uint8_t *dstv = dst[2] + dstStride[2] * srcSliceY / 2;
  50.     const uint8_t *ip = src[0] + srcStride[0] * srcSliceY;
  51.     int w = dstStride[0];
  52.  
  53.     ff_bfin_uyvytoyv12(ip, dsty, dstu, dstv, w, srcSliceH,
  54.                        dstStride[0], dstStride[1], srcStride[0]);
  55.  
  56.     return srcSliceH;
  57. }
  58.  
  59. static int yuyvtoyv12_unscaled(SwsContext *c, const uint8_t *src[],
  60.                                int srcStride[], int srcSliceY, int srcSliceH,
  61.                                uint8_t *dst[], int dstStride[])
  62. {
  63.     uint8_t *dsty = dst[0] + dstStride[0] * srcSliceY;
  64.     uint8_t *dstu = dst[1] + dstStride[1] * srcSliceY / 2;
  65.     uint8_t *dstv = dst[2] + dstStride[2] * srcSliceY / 2;
  66.     const uint8_t *ip = src[0] + srcStride[0] * srcSliceY;
  67.     int w = dstStride[0];
  68.  
  69.     ff_bfin_yuyvtoyv12(ip, dsty, dstu, dstv, w, srcSliceH,
  70.                        dstStride[0], dstStride[1], srcStride[0]);
  71.  
  72.     return srcSliceH;
  73. }
  74.  
  75. av_cold void ff_get_unscaled_swscale_bfin(SwsContext *c)
  76. {
  77.     if (c->dstFormat == AV_PIX_FMT_YUV420P && c->srcFormat == AV_PIX_FMT_UYVY422) {
  78.         av_log(NULL, AV_LOG_VERBOSE,
  79.                "selecting Blackfin optimized uyvytoyv12_unscaled\n");
  80.         c->swscale = uyvytoyv12_unscaled;
  81.     }
  82.     if (c->dstFormat == AV_PIX_FMT_YUV420P && c->srcFormat == AV_PIX_FMT_YUYV422) {
  83.         av_log(NULL, AV_LOG_VERBOSE,
  84.                "selecting Blackfin optimized yuyvtoyv12_unscaled\n");
  85.         c->swscale = yuyvtoyv12_unscaled;
  86.     }
  87. }
  88.