1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libvpx/vp9/common/vp9_scale.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,57 @@
1.4 +/*
1.5 + * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license
1.8 + * that can be found in the LICENSE file in the root of the source
1.9 + * tree. An additional intellectual property rights grant can be found
1.10 + * in the file PATENTS. All contributing project authors may
1.11 + * be found in the AUTHORS file in the root of the source tree.
1.12 + */
1.13 +
1.14 +#ifndef VP9_COMMON_VP9_SCALE_H_
1.15 +#define VP9_COMMON_VP9_SCALE_H_
1.16 +
1.17 +#include "vp9/common/vp9_mv.h"
1.18 +#include "vp9/common/vp9_convolve.h"
1.19 +
1.20 +#define REF_SCALE_SHIFT 14
1.21 +#define REF_NO_SCALE (1 << REF_SCALE_SHIFT)
1.22 +#define REF_INVALID_SCALE -1
1.23 +
1.24 +struct scale_factors;
1.25 +struct scale_factors_common {
1.26 + int x_scale_fp; // horizontal fixed point scale factor
1.27 + int y_scale_fp; // vertical fixed point scale factor
1.28 + int x_step_q4;
1.29 + int y_step_q4;
1.30 +
1.31 + int (*scale_value_x)(int val, const struct scale_factors_common *sfc);
1.32 + int (*scale_value_y)(int val, const struct scale_factors_common *sfc);
1.33 + void (*set_scaled_offsets)(struct scale_factors *scale, int row, int col);
1.34 + MV32 (*scale_mv)(const MV *mv, const struct scale_factors *scale);
1.35 +
1.36 + convolve_fn_t predict[2][2][2]; // horiz, vert, avg
1.37 +};
1.38 +
1.39 +struct scale_factors {
1.40 + int x_offset_q4;
1.41 + int y_offset_q4;
1.42 + const struct scale_factors_common *sfc;
1.43 +};
1.44 +
1.45 +void vp9_setup_scale_factors_for_frame(struct scale_factors *scale,
1.46 + struct scale_factors_common *scale_comm,
1.47 + int other_w, int other_h,
1.48 + int this_w, int this_h);
1.49 +
1.50 +static int vp9_is_valid_scale(const struct scale_factors_common *sfc) {
1.51 + return sfc->x_scale_fp != REF_INVALID_SCALE &&
1.52 + sfc->y_scale_fp != REF_INVALID_SCALE;
1.53 +}
1.54 +
1.55 +static int vp9_is_scaled(const struct scale_factors_common *sfc) {
1.56 + return sfc->x_scale_fp != REF_NO_SCALE ||
1.57 + sfc->y_scale_fp != REF_NO_SCALE;
1.58 +}
1.59 +
1.60 +#endif // VP9_COMMON_VP9_SCALE_H_
