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vp9_scale.h


products/Sources/formale Sprachen/C/Firefox/media/libvpx/libvpx/vp9/common/vp9_scale.h

/* * Copyright (c) 2013 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. */ #ifndef VPX_VP9_COMMON_VP9_SCALE_H_ #define VPX_VP9_COMMON_VP9_SCALE_H_ #include "vp9/common/vp9_mv.h" #include "vpx_dsp/vpx_convolve.h" #ifdef __cplusplus extern "C" { #endif #define REF_SCALE_SHIFT 14 #define REF_NO_SCALE (1 << REF_SCALE_SHIFT) #define REF_INVALID_SCALE (-1) struct scale_factors { int x_scale_fp; // horizontal fixed point scale factor int y_scale_fp; // vertical fixed point scale factor int x_step_q4; int y_step_q4; int (*scale_value_x)(int val, const struct scale_factors *sf); int (*scale_value_y)(int val, const struct scale_factors *sf); convolve_fn_t predict[2][2][2]; // horiz, vert, avg #if CONFIG_VP9_HIGHBITDEPTH highbd_convolve_fn_t highbd_predict[2][2][2]; // horiz, vert, avg #endif }; MV32 vp9_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf); #if CONFIG_VP9_HIGHBITDEPTH void vp9_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, int other_h, int this_w, int this_h, int use_highbd); #else void vp9_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, int other_h, int this_w, int this_h); #endif static INLINE int vp9_is_valid_scale(const struct scale_factors *sf) { return sf->x_scale_fp != REF_INVALID_SCALE && sf->y_scale_fp != REF_INVALID_SCALE; } static INLINE int vp9_is_scaled(const struct scale_factors *sf) { return vp9_is_valid_scale(sf) && (sf->x_scale_fp != REF_NO_SCALE || sf->y_scale_fp != REF_NO_SCALE); } static INLINE int valid_ref_frame_size(int ref_width, int ref_height, int this_width, int this_height) { return 2 * this_width >= ref_width && 2 * this_height >= ref_height && this_width <= 16 * ref_width && this_height <= 16 * ref_height; } #ifdef __cplusplus } // extern "C" #endif #endif // VPX_VP9_COMMON_VP9_SCALE_H_

                                                                                                                                                                                                                                                                                                                                                                                                     

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