From 6e2cb00008cbf09e556b00f87603797fcaa47e09 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Mon, 16 Apr 2018 05:37:14 -0700 Subject: Depenancy upgrades and movign to dep. (#8630) --- vendor/golang.org/x/image/vp8/predfunc.go | 553 ------------------------------ 1 file changed, 553 deletions(-) delete mode 100644 vendor/golang.org/x/image/vp8/predfunc.go (limited to 'vendor/golang.org/x/image/vp8/predfunc.go') diff --git a/vendor/golang.org/x/image/vp8/predfunc.go b/vendor/golang.org/x/image/vp8/predfunc.go deleted file mode 100644 index f8999582b..000000000 --- a/vendor/golang.org/x/image/vp8/predfunc.go +++ /dev/null @@ -1,553 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package vp8 - -// This file implements the predicition functions, as specified in chapter 12. -// -// For each macroblock (of 1x16x16 luma and 2x8x8 chroma coefficients), the -// luma values are either predicted as one large 16x16 region or 16 separate -// 4x4 regions. The chroma values are always predicted as one 8x8 region. -// -// For 4x4 regions, the target block's predicted values (Xs) are a function of -// its previously-decoded top and left border values, as well as a number of -// pixels from the top-right: -// -// a b c d e f g h -// p X X X X -// q X X X X -// r X X X X -// s X X X X -// -// The predictor modes are: -// - DC: all Xs = (b + c + d + e + p + q + r + s + 4) / 8. -// - TM: the first X = (b + p - a), the second X = (c + p - a), and so on. -// - VE: each X = the weighted average of its column's top value and that -// value's neighbors, i.e. averages of abc, bcd, cde or def. -// - HE: similar to VE except rows instead of columns, and the final row is -// an average of r, s and s. -// - RD, VR, LD, VL, HD, HU: these diagonal modes ("Right Down", "Vertical -// Right", etc) are more complicated and are described in section 12.3. -// All Xs are clipped to the range [0, 255]. -// -// For 8x8 and 16x16 regions, the target block's predicted values are a -// function of the top and left border values without the top-right overhang, -// i.e. without the 8x8 or 16x16 equivalent of f, g and h. Furthermore: -// - There are no diagonal predictor modes, only DC, TM, VE and HE. -// - The DC mode has variants for macroblocks in the top row and/or left -// column, i.e. for macroblocks with mby == 0 || mbx == 0. -// - The VE and HE modes take only the column top or row left values; they do -// not smooth that top/left value with its neighbors. - -// nPred is the number of predictor modes, not including the Top/Left versions -// of the DC predictor mode. -const nPred = 10 - -const ( - predDC = iota - predTM - predVE - predHE - predRD - predVR - predLD - predVL - predHD - predHU - predDCTop - predDCLeft - predDCTopLeft -) - -func checkTopLeftPred(mbx, mby int, p uint8) uint8 { - if p != predDC { - return p - } - if mbx == 0 { - if mby == 0 { - return predDCTopLeft - } - return predDCLeft - } - if mby == 0 { - return predDCTop - } - return predDC -} - -var predFunc4 = [...]func(*Decoder, int, int){ - predFunc4DC, - predFunc4TM, - predFunc4VE, - predFunc4HE, - predFunc4RD, - predFunc4VR, - predFunc4LD, - predFunc4VL, - predFunc4HD, - predFunc4HU, - nil, - nil, - nil, -} - -var predFunc8 = [...]func(*Decoder, int, int){ - predFunc8DC, - predFunc8TM, - predFunc8VE, - predFunc8HE, - nil, - nil, - nil, - nil, - nil, - nil, - predFunc8DCTop, - predFunc8DCLeft, - predFunc8DCTopLeft, -} - -var predFunc16 = [...]func(*Decoder, int, int){ - predFunc16DC, - predFunc16TM, - predFunc16VE, - predFunc16HE, - nil, - nil, - nil, - nil, - nil, - nil, - predFunc16DCTop, - predFunc16DCLeft, - predFunc16DCTopLeft, -} - -func predFunc4DC(z *Decoder, y, x int) { - sum := uint32(4) - for i := 0; i < 4; i++ { - sum += uint32(z.ybr[y-1][x+i]) - } - for j := 0; j < 4; j++ { - sum += uint32(z.ybr[y+j][x-1]) - } - avg := uint8(sum / 8) - for j := 0; j < 4; j++ { - for i := 0; i < 4; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc4TM(z *Decoder, y, x int) { - delta0 := -int32(z.ybr[y-1][x-1]) - for j := 0; j < 4; j++ { - delta1 := delta0 + int32(z.ybr[y+j][x-1]) - for i := 0; i < 4; i++ { - delta2 := delta1 + int32(z.ybr[y-1][x+i]) - z.ybr[y+j][x+i] = uint8(clip(delta2, 0, 255)) - } - } -} - -func predFunc4VE(z *Decoder, y, x int) { - a := int32(z.ybr[y-1][x-1]) - b := int32(z.ybr[y-1][x+0]) - c := int32(z.ybr[y-1][x+1]) - d := int32(z.ybr[y-1][x+2]) - e := int32(z.ybr[y-1][x+3]) - f := int32(z.ybr[y-1][x+4]) - abc := uint8((a + 2*b + c + 2) / 4) - bcd := uint8((b + 2*c + d + 2) / 4) - cde := uint8((c + 2*d + e + 2) / 4) - def := uint8((d + 2*e + f + 2) / 4) - for j := 0; j < 4; j++ { - z.ybr[y+j][x+0] = abc - z.ybr[y+j][x+1] = bcd - z.ybr[y+j][x+2] = cde - z.ybr[y+j][x+3] = def - } -} - -func predFunc4HE(z *Decoder, y, x int) { - s := int32(z.ybr[y+3][x-1]) - r := int32(z.ybr[y+2][x-1]) - q := int32(z.ybr[y+1][x-1]) - p := int32(z.ybr[y+0][x-1]) - a := int32(z.ybr[y-1][x-1]) - ssr := uint8((s + 2*s + r + 2) / 4) - srq := uint8((s + 2*r + q + 2) / 4) - rqp := uint8((r + 2*q + p + 2) / 4) - apq := uint8((a + 2*p + q + 2) / 4) - for i := 0; i < 4; i++ { - z.ybr[y+0][x+i] = apq - z.ybr[y+1][x+i] = rqp - z.ybr[y+2][x+i] = srq - z.ybr[y+3][x+i] = ssr - } -} - -func predFunc4RD(z *Decoder, y, x int) { - s := int32(z.ybr[y+3][x-1]) - r := int32(z.ybr[y+2][x-1]) - q := int32(z.ybr[y+1][x-1]) - p := int32(z.ybr[y+0][x-1]) - a := int32(z.ybr[y-1][x-1]) - b := int32(z.ybr[y-1][x+0]) - c := int32(z.ybr[y-1][x+1]) - d := int32(z.ybr[y-1][x+2]) - e := int32(z.ybr[y-1][x+3]) - srq := uint8((s + 2*r + q + 2) / 4) - rqp := uint8((r + 2*q + p + 2) / 4) - qpa := uint8((q + 2*p + a + 2) / 4) - pab := uint8((p + 2*a + b + 2) / 4) - abc := uint8((a + 2*b + c + 2) / 4) - bcd := uint8((b + 2*c + d + 2) / 4) - cde := uint8((c + 2*d + e + 2) / 4) - z.ybr[y+0][x+0] = pab - z.ybr[y+0][x+1] = abc - z.ybr[y+0][x+2] = bcd - z.ybr[y+0][x+3] = cde - z.ybr[y+1][x+0] = qpa - z.ybr[y+1][x+1] = pab - z.ybr[y+1][x+2] = abc - z.ybr[y+1][x+3] = bcd - z.ybr[y+2][x+0] = rqp - z.ybr[y+2][x+1] = qpa - z.ybr[y+2][x+2] = pab - z.ybr[y+2][x+3] = abc - z.ybr[y+3][x+0] = srq - z.ybr[y+3][x+1] = rqp - z.ybr[y+3][x+2] = qpa - z.ybr[y+3][x+3] = pab -} - -func predFunc4VR(z *Decoder, y, x int) { - r := int32(z.ybr[y+2][x-1]) - q := int32(z.ybr[y+1][x-1]) - p := int32(z.ybr[y+0][x-1]) - a := int32(z.ybr[y-1][x-1]) - b := int32(z.ybr[y-1][x+0]) - c := int32(z.ybr[y-1][x+1]) - d := int32(z.ybr[y-1][x+2]) - e := int32(z.ybr[y-1][x+3]) - ab := uint8((a + b + 1) / 2) - bc := uint8((b + c + 1) / 2) - cd := uint8((c + d + 1) / 2) - de := uint8((d + e + 1) / 2) - rqp := uint8((r + 2*q + p + 2) / 4) - qpa := uint8((q + 2*p + a + 2) / 4) - pab := uint8((p + 2*a + b + 2) / 4) - abc := uint8((a + 2*b + c + 2) / 4) - bcd := uint8((b + 2*c + d + 2) / 4) - cde := uint8((c + 2*d + e + 2) / 4) - z.ybr[y+0][x+0] = ab - z.ybr[y+0][x+1] = bc - z.ybr[y+0][x+2] = cd - z.ybr[y+0][x+3] = de - z.ybr[y+1][x+0] = pab - z.ybr[y+1][x+1] = abc - z.ybr[y+1][x+2] = bcd - z.ybr[y+1][x+3] = cde - z.ybr[y+2][x+0] = qpa - z.ybr[y+2][x+1] = ab - z.ybr[y+2][x+2] = bc - z.ybr[y+2][x+3] = cd - z.ybr[y+3][x+0] = rqp - z.ybr[y+3][x+1] = pab - z.ybr[y+3][x+2] = abc - z.ybr[y+3][x+3] = bcd -} - -func predFunc4LD(z *Decoder, y, x int) { - a := int32(z.ybr[y-1][x+0]) - b := int32(z.ybr[y-1][x+1]) - c := int32(z.ybr[y-1][x+2]) - d := int32(z.ybr[y-1][x+3]) - e := int32(z.ybr[y-1][x+4]) - f := int32(z.ybr[y-1][x+5]) - g := int32(z.ybr[y-1][x+6]) - h := int32(z.ybr[y-1][x+7]) - abc := uint8((a + 2*b + c + 2) / 4) - bcd := uint8((b + 2*c + d + 2) / 4) - cde := uint8((c + 2*d + e + 2) / 4) - def := uint8((d + 2*e + f + 2) / 4) - efg := uint8((e + 2*f + g + 2) / 4) - fgh := uint8((f + 2*g + h + 2) / 4) - ghh := uint8((g + 2*h + h + 2) / 4) - z.ybr[y+0][x+0] = abc - z.ybr[y+0][x+1] = bcd - z.ybr[y+0][x+2] = cde - z.ybr[y+0][x+3] = def - z.ybr[y+1][x+0] = bcd - z.ybr[y+1][x+1] = cde - z.ybr[y+1][x+2] = def - z.ybr[y+1][x+3] = efg - z.ybr[y+2][x+0] = cde - z.ybr[y+2][x+1] = def - z.ybr[y+2][x+2] = efg - z.ybr[y+2][x+3] = fgh - z.ybr[y+3][x+0] = def - z.ybr[y+3][x+1] = efg - z.ybr[y+3][x+2] = fgh - z.ybr[y+3][x+3] = ghh -} - -func predFunc4VL(z *Decoder, y, x int) { - a := int32(z.ybr[y-1][x+0]) - b := int32(z.ybr[y-1][x+1]) - c := int32(z.ybr[y-1][x+2]) - d := int32(z.ybr[y-1][x+3]) - e := int32(z.ybr[y-1][x+4]) - f := int32(z.ybr[y-1][x+5]) - g := int32(z.ybr[y-1][x+6]) - h := int32(z.ybr[y-1][x+7]) - ab := uint8((a + b + 1) / 2) - bc := uint8((b + c + 1) / 2) - cd := uint8((c + d + 1) / 2) - de := uint8((d + e + 1) / 2) - abc := uint8((a + 2*b + c + 2) / 4) - bcd := uint8((b + 2*c + d + 2) / 4) - cde := uint8((c + 2*d + e + 2) / 4) - def := uint8((d + 2*e + f + 2) / 4) - efg := uint8((e + 2*f + g + 2) / 4) - fgh := uint8((f + 2*g + h + 2) / 4) - z.ybr[y+0][x+0] = ab - z.ybr[y+0][x+1] = bc - z.ybr[y+0][x+2] = cd - z.ybr[y+0][x+3] = de - z.ybr[y+1][x+0] = abc - z.ybr[y+1][x+1] = bcd - z.ybr[y+1][x+2] = cde - z.ybr[y+1][x+3] = def - z.ybr[y+2][x+0] = bc - z.ybr[y+2][x+1] = cd - z.ybr[y+2][x+2] = de - z.ybr[y+2][x+3] = efg - z.ybr[y+3][x+0] = bcd - z.ybr[y+3][x+1] = cde - z.ybr[y+3][x+2] = def - z.ybr[y+3][x+3] = fgh -} - -func predFunc4HD(z *Decoder, y, x int) { - s := int32(z.ybr[y+3][x-1]) - r := int32(z.ybr[y+2][x-1]) - q := int32(z.ybr[y+1][x-1]) - p := int32(z.ybr[y+0][x-1]) - a := int32(z.ybr[y-1][x-1]) - b := int32(z.ybr[y-1][x+0]) - c := int32(z.ybr[y-1][x+1]) - d := int32(z.ybr[y-1][x+2]) - sr := uint8((s + r + 1) / 2) - rq := uint8((r + q + 1) / 2) - qp := uint8((q + p + 1) / 2) - pa := uint8((p + a + 1) / 2) - srq := uint8((s + 2*r + q + 2) / 4) - rqp := uint8((r + 2*q + p + 2) / 4) - qpa := uint8((q + 2*p + a + 2) / 4) - pab := uint8((p + 2*a + b + 2) / 4) - abc := uint8((a + 2*b + c + 2) / 4) - bcd := uint8((b + 2*c + d + 2) / 4) - z.ybr[y+0][x+0] = pa - z.ybr[y+0][x+1] = pab - z.ybr[y+0][x+2] = abc - z.ybr[y+0][x+3] = bcd - z.ybr[y+1][x+0] = qp - z.ybr[y+1][x+1] = qpa - z.ybr[y+1][x+2] = pa - z.ybr[y+1][x+3] = pab - z.ybr[y+2][x+0] = rq - z.ybr[y+2][x+1] = rqp - z.ybr[y+2][x+2] = qp - z.ybr[y+2][x+3] = qpa - z.ybr[y+3][x+0] = sr - z.ybr[y+3][x+1] = srq - z.ybr[y+3][x+2] = rq - z.ybr[y+3][x+3] = rqp -} - -func predFunc4HU(z *Decoder, y, x int) { - s := int32(z.ybr[y+3][x-1]) - r := int32(z.ybr[y+2][x-1]) - q := int32(z.ybr[y+1][x-1]) - p := int32(z.ybr[y+0][x-1]) - pq := uint8((p + q + 1) / 2) - qr := uint8((q + r + 1) / 2) - rs := uint8((r + s + 1) / 2) - pqr := uint8((p + 2*q + r + 2) / 4) - qrs := uint8((q + 2*r + s + 2) / 4) - rss := uint8((r + 2*s + s + 2) / 4) - sss := uint8(s) - z.ybr[y+0][x+0] = pq - z.ybr[y+0][x+1] = pqr - z.ybr[y+0][x+2] = qr - z.ybr[y+0][x+3] = qrs - z.ybr[y+1][x+0] = qr - z.ybr[y+1][x+1] = qrs - z.ybr[y+1][x+2] = rs - z.ybr[y+1][x+3] = rss - z.ybr[y+2][x+0] = rs - z.ybr[y+2][x+1] = rss - z.ybr[y+2][x+2] = sss - z.ybr[y+2][x+3] = sss - z.ybr[y+3][x+0] = sss - z.ybr[y+3][x+1] = sss - z.ybr[y+3][x+2] = sss - z.ybr[y+3][x+3] = sss -} - -func predFunc8DC(z *Decoder, y, x int) { - sum := uint32(8) - for i := 0; i < 8; i++ { - sum += uint32(z.ybr[y-1][x+i]) - } - for j := 0; j < 8; j++ { - sum += uint32(z.ybr[y+j][x-1]) - } - avg := uint8(sum / 16) - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc8TM(z *Decoder, y, x int) { - delta0 := -int32(z.ybr[y-1][x-1]) - for j := 0; j < 8; j++ { - delta1 := delta0 + int32(z.ybr[y+j][x-1]) - for i := 0; i < 8; i++ { - delta2 := delta1 + int32(z.ybr[y-1][x+i]) - z.ybr[y+j][x+i] = uint8(clip(delta2, 0, 255)) - } - } -} - -func predFunc8VE(z *Decoder, y, x int) { - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - z.ybr[y+j][x+i] = z.ybr[y-1][x+i] - } - } -} - -func predFunc8HE(z *Decoder, y, x int) { - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - z.ybr[y+j][x+i] = z.ybr[y+j][x-1] - } - } -} - -func predFunc8DCTop(z *Decoder, y, x int) { - sum := uint32(4) - for j := 0; j < 8; j++ { - sum += uint32(z.ybr[y+j][x-1]) - } - avg := uint8(sum / 8) - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc8DCLeft(z *Decoder, y, x int) { - sum := uint32(4) - for i := 0; i < 8; i++ { - sum += uint32(z.ybr[y-1][x+i]) - } - avg := uint8(sum / 8) - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc8DCTopLeft(z *Decoder, y, x int) { - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - z.ybr[y+j][x+i] = 0x80 - } - } -} - -func predFunc16DC(z *Decoder, y, x int) { - sum := uint32(16) - for i := 0; i < 16; i++ { - sum += uint32(z.ybr[y-1][x+i]) - } - for j := 0; j < 16; j++ { - sum += uint32(z.ybr[y+j][x-1]) - } - avg := uint8(sum / 32) - for j := 0; j < 16; j++ { - for i := 0; i < 16; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc16TM(z *Decoder, y, x int) { - delta0 := -int32(z.ybr[y-1][x-1]) - for j := 0; j < 16; j++ { - delta1 := delta0 + int32(z.ybr[y+j][x-1]) - for i := 0; i < 16; i++ { - delta2 := delta1 + int32(z.ybr[y-1][x+i]) - z.ybr[y+j][x+i] = uint8(clip(delta2, 0, 255)) - } - } -} - -func predFunc16VE(z *Decoder, y, x int) { - for j := 0; j < 16; j++ { - for i := 0; i < 16; i++ { - z.ybr[y+j][x+i] = z.ybr[y-1][x+i] - } - } -} - -func predFunc16HE(z *Decoder, y, x int) { - for j := 0; j < 16; j++ { - for i := 0; i < 16; i++ { - z.ybr[y+j][x+i] = z.ybr[y+j][x-1] - } - } -} - -func predFunc16DCTop(z *Decoder, y, x int) { - sum := uint32(8) - for j := 0; j < 16; j++ { - sum += uint32(z.ybr[y+j][x-1]) - } - avg := uint8(sum / 16) - for j := 0; j < 16; j++ { - for i := 0; i < 16; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc16DCLeft(z *Decoder, y, x int) { - sum := uint32(8) - for i := 0; i < 16; i++ { - sum += uint32(z.ybr[y-1][x+i]) - } - avg := uint8(sum / 16) - for j := 0; j < 16; j++ { - for i := 0; i < 16; i++ { - z.ybr[y+j][x+i] = avg - } - } -} - -func predFunc16DCTopLeft(z *Decoder, y, x int) { - for j := 0; j < 16; j++ { - for i := 0; i < 16; i++ { - z.ybr[y+j][x+i] = 0x80 - } - } -} -- cgit v1.2.3-1-g7c22