filter_arm.c

/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


#include "vpx_ports/config.h"
#include <math.h>
#include "vp8/common/filter.h"
#include "vp8/common/subpixel.h"
#include "vpx_ports/mem.h"

extern void vp8_filter_block2d_first_pass_armv6
(
  unsigned char *src_ptr,
  short         *output_ptr,
  unsigned int src_pixels_per_line,
  unsigned int output_width,
  unsigned int output_height,
  const short *vp8_filter
);

// 8x8
extern void vp8_filter_block2d_first_pass_8x8_armv6
(
  unsigned char *src_ptr,
  short         *output_ptr,
  unsigned int src_pixels_per_line,
  unsigned int output_width,
  unsigned int output_height,
  const short *vp8_filter
);

// 16x16
extern void vp8_filter_block2d_first_pass_16x16_armv6
(
  unsigned char *src_ptr,
  short         *output_ptr,
  unsigned int src_pixels_per_line,
  unsigned int output_width,
  unsigned int output_height,
  const short *vp8_filter
);

extern void vp8_filter_block2d_second_pass_armv6
(
  short         *src_ptr,
  unsigned char *output_ptr,
  unsigned int output_pitch,
  unsigned int cnt,
  const short *vp8_filter
);

extern void vp8_filter4_block2d_second_pass_armv6
(
  short         *src_ptr,
  unsigned char *output_ptr,
  unsigned int output_pitch,
  unsigned int cnt,
  const short *vp8_filter
);

extern void vp8_filter_block2d_first_pass_only_armv6
(
  unsigned char *src_ptr,
  unsigned char *output_ptr,
  unsigned int src_pixels_per_line,
  unsigned int cnt,
  unsigned int output_pitch,
  const short *vp8_filter
);


extern void vp8_filter_block2d_second_pass_only_armv6
(
  unsigned char *src_ptr,
  unsigned char *output_ptr,
  unsigned int src_pixels_per_line,
  unsigned int cnt,
  unsigned int output_pitch,
  const short *vp8_filter
);

#if HAVE_ARMV6
void vp9_sixtap_predict_armv6
(
  unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  unsigned char *dst_ptr,
  int  dst_pitch
) {
  const short  *HFilter;
  const short  *VFilter;
  DECLARE_ALIGNED_ARRAY(4, short, FData, 12 * 4); /* Temp data buffer used in filtering */


  HFilter = vp8_sub_pel_filters[xoffset];   /* 6 tap */
  VFilter = vp8_sub_pel_filters[yoffset];   /* 6 tap */

  /* Vfilter is null. First pass only */
  if (xoffset && !yoffset) {
    /*vp8_filter_block2d_first_pass_armv6 ( src_ptr, FData+2, src_pixels_per_line, 4, 4, HFilter );
    vp8_filter_block2d_second_pass_armv6 ( FData+2, dst_ptr, dst_pitch, 4, VFilter );*/

    vp8_filter_block2d_first_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 4, dst_pitch, HFilter);
  }
  /* Hfilter is null. Second pass only */
  else if (!xoffset && yoffset) {
    vp8_filter_block2d_second_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 4, dst_pitch, VFilter);
  } else {
    /* Vfilter is a 4 tap filter */
    if (yoffset & 0x1) {
      vp8_filter_block2d_first_pass_armv6(src_ptr - src_pixels_per_line, FData + 1, src_pixels_per_line, 4, 7, HFilter);
      vp8_filter4_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 4, VFilter);
    }
    /* Vfilter is 6 tap filter */
    else {
      vp8_filter_block2d_first_pass_armv6(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 4, 9, HFilter);
      vp8_filter_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 4, VFilter);
    }
  }
}

void vp9_sixtap_predict8x8_armv6
(
  unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  unsigned char *dst_ptr,
  int  dst_pitch
) {
  const short  *HFilter;
  const short  *VFilter;
  DECLARE_ALIGNED_ARRAY(4, short, FData, 16 * 8); /* Temp data buffer used in filtering */

  HFilter = vp8_sub_pel_filters[xoffset];   /* 6 tap */
  VFilter = vp8_sub_pel_filters[yoffset];   /* 6 tap */

  if (xoffset && !yoffset) {
    vp8_filter_block2d_first_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 8, dst_pitch, HFilter);
  }
  /* Hfilter is null. Second pass only */
  else if (!xoffset && yoffset) {
    vp8_filter_block2d_second_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 8, dst_pitch, VFilter);
  } else {
    if (yoffset & 0x1) {
      vp8_filter_block2d_first_pass_8x8_armv6(src_ptr - src_pixels_per_line, FData + 1, src_pixels_per_line, 8, 11, HFilter);
      vp8_filter4_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 8, VFilter);
    } else {
      vp8_filter_block2d_first_pass_8x8_armv6(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 8, 13, HFilter);
      vp8_filter_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 8, VFilter);
    }
  }
}


void vp9_sixtap_predict16x16_armv6
(
  unsigned char  *src_ptr,
  int  src_pixels_per_line,
  int  xoffset,
  int  yoffset,
  unsigned char *dst_ptr,
  int  dst_pitch
) {
  const short  *HFilter;
  const short  *VFilter;
  DECLARE_ALIGNED_ARRAY(4, short, FData, 24 * 16);  /* Temp data buffer used in filtering */

  HFilter = vp8_sub_pel_filters[xoffset];   /* 6 tap */
  VFilter = vp8_sub_pel_filters[yoffset];   /* 6 tap */

  if (xoffset && !yoffset) {
    vp8_filter_block2d_first_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 16, dst_pitch, HFilter);
  }
  /* Hfilter is null. Second pass only */
  else if (!xoffset && yoffset) {
    vp8_filter_block2d_second_pass_only_armv6(src_ptr, dst_ptr, src_pixels_per_line, 16, dst_pitch, VFilter);
  } else {
    if (yoffset & 0x1) {
      vp8_filter_block2d_first_pass_16x16_armv6(src_ptr - src_pixels_per_line, FData + 1, src_pixels_per_line, 16, 19, HFilter);
      vp8_filter4_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 16, VFilter);
    } else {
      vp8_filter_block2d_first_pass_16x16_armv6(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 16, 21, HFilter);
      vp8_filter_block2d_second_pass_armv6(FData + 2, dst_ptr, dst_pitch, 16, VFilter);
    }
  }

}
#endif