vpx_scale/include/generic/vpxscale_arbitrary.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 #ifndef __VPX_SCALE_ARBITRARY_H__
  13 #define __VPX_SCALE_ARBITRARY_H__
  14
  15 #include "vpx_scale/yv12config.h"
  16
  17 typedef struct
  18 {
  19     int in_width;
  20     int in_height;
  21
  22     int out_width;
  23     int out_height;
  24     int max_usable_out_width;
  25
  26     // numerator for the width and height
  27     int nw;
  28     int nh;
  29     int nh_uv;
  30
  31     // output to input correspondance array
  32     short *l_w;
  33     short *l_h;
  34     short *l_h_uv;
  35
  36     // polyphase coefficients
  37     short *c_w;
  38     short *c_h;
  39     short *c_h_uv;
  40
  41     // buffer for horizontal filtering.
  42     unsigned char *hbuf;
  43     unsigned char *hbuf_uv;
  44 } BICUBIC_SCALER_STRUCT;
  45
  46 int bicubic_coefficient_setup(int in_width, int in_height, int out_width, int out_height);
  47 int bicubic_scale(int in_width, int in_height, int in_stride,
  48                   int out_width, int out_height, int out_stride,
  49                   unsigned char *input_image, unsigned char *output_image);
  50 void bicubic_scale_frame_reset();
  51 void bicubic_scale_frame(YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst,
  52                          int new_width, int new_height);
  53 void bicubic_coefficient_init();
  54 void bicubic_coefficient_destroy();
  55
  56 #endif /* __VPX_SCALE_ARBITRARY_H__ */