111 lines
3.8 KiB
C++
111 lines
3.8 KiB
C++
/*****************************************************************************
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* Copyright (C) 2013 x265 project
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*
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* Authors: Steve Borho <steve@borho.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at license @ x265.com.
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*****************************************************************************/
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#ifndef X265_MV_H
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#define X265_MV_H
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#include "common.h"
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#include "primitives.h"
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namespace X265_NS {
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// private x265 namespace
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#if _MSC_VER
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#pragma warning(disable: 4201) // non-standard extension used (nameless struct/union)
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#endif
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struct MV
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{
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public:
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union {
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struct { int16_t x, y; };
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int32_t word;
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};
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MV() {}
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MV(int32_t w) : word(w) {}
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MV(int16_t _x, int16_t _y) : x(_x), y(_y) {}
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MV& operator =(uint32_t w) { word = w; return *this; }
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MV& operator +=(const MV& other) { x += other.x; y += other.y; return *this; }
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MV& operator -=(const MV& other) { x -= other.x; y -= other.y; return *this; }
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MV& operator >>=(int i) { x >>= i; y >>= i; return *this; }
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#if USING_FTRAPV
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/* avoid signed left-shifts when -ftrapv is enabled */
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MV& operator <<=(int i) { x *= (1 << i); y *= (1 << i); return *this; }
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MV operator <<(int i) const { return MV(x * (1 << i), y * (1 << i)); }
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#else
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MV& operator <<=(int i) { x <<= i; y <<= i; return *this; }
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MV operator <<(int i) const { return MV(x << i, y << i); }
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#endif
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MV operator >>(int i) const { return MV(x >> i, y >> i); }
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MV operator *(int16_t i) const { return MV(x * i, y * i); }
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MV operator -(const MV& other) const { return MV(x - other.x, y - other.y); }
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MV operator +(const MV& other) const { return MV(x + other.x, y + other.y); }
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bool operator ==(const MV& other) const { return word == other.word; }
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bool operator !=(const MV& other) const { return word != other.word; }
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bool operator !() const { return !word; }
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// Scale down a QPEL mv to FPEL mv, rounding up by one HPEL offset
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MV roundToFPel() const { return MV((x + 2) >> 2, (y + 2) >> 2); }
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// Scale up an FPEL mv to QPEL by shifting up two bits
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MV toQPel() const { return *this << 2; }
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bool inline notZero() const { return this->word != 0; }
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bool inline isSubpel() const { return (this->word & 0x00030003) != 0; }
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MV mvmin(const MV& m) const { return MV(x > m.x ? m.x : x, y > m.y ? m.y : y); }
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MV mvmax(const MV& m) const { return MV(x < m.x ? m.x : x, y < m.y ? m.y : y); }
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MV clipped(const MV& _min, const MV& _max) const
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{
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MV cl = mvmin(_max);
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return cl.mvmax(_min);
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}
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// returns true if MV is within range (inclusive)
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bool checkRange(const MV& _min, const MV& _max) const
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{
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return x >= _min.x && x <= _max.x && y >= _min.y && y <= _max.y;
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}
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};
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}
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#endif // ifndef X265_MV_H
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