From 14bb08c1df8db9ec6c8a05520d4eee67971235d9 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Thu, 27 Sep 2018 20:03:23 +0200 Subject: mod tidy --- vendor/golang.org/x/image/vp8/quant.go | 98 ---------------------------------- 1 file changed, 98 deletions(-) delete mode 100644 vendor/golang.org/x/image/vp8/quant.go (limited to 'vendor/golang.org/x/image/vp8/quant.go') diff --git a/vendor/golang.org/x/image/vp8/quant.go b/vendor/golang.org/x/image/vp8/quant.go deleted file mode 100644 index da43616..0000000 --- a/vendor/golang.org/x/image/vp8/quant.go +++ /dev/null @@ -1,98 +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 parsing the quantization factors. - -// quant are DC/AC quantization factors. -type quant struct { - y1 [2]uint16 - y2 [2]uint16 - uv [2]uint16 -} - -// clip clips x to the range [min, max] inclusive. -func clip(x, min, max int32) int32 { - if x < min { - return min - } - if x > max { - return max - } - return x -} - -// parseQuant parses the quantization factors, as specified in section 9.6. -func (d *Decoder) parseQuant() { - baseQ0 := d.fp.readUint(uniformProb, 7) - dqy1DC := d.fp.readOptionalInt(uniformProb, 4) - const dqy1AC = 0 - dqy2DC := d.fp.readOptionalInt(uniformProb, 4) - dqy2AC := d.fp.readOptionalInt(uniformProb, 4) - dquvDC := d.fp.readOptionalInt(uniformProb, 4) - dquvAC := d.fp.readOptionalInt(uniformProb, 4) - for i := 0; i < nSegment; i++ { - q := int32(baseQ0) - if d.segmentHeader.useSegment { - if d.segmentHeader.relativeDelta { - q += int32(d.segmentHeader.quantizer[i]) - } else { - q = int32(d.segmentHeader.quantizer[i]) - } - } - d.quant[i].y1[0] = dequantTableDC[clip(q+dqy1DC, 0, 127)] - d.quant[i].y1[1] = dequantTableAC[clip(q+dqy1AC, 0, 127)] - d.quant[i].y2[0] = dequantTableDC[clip(q+dqy2DC, 0, 127)] * 2 - d.quant[i].y2[1] = dequantTableAC[clip(q+dqy2AC, 0, 127)] * 155 / 100 - if d.quant[i].y2[1] < 8 { - d.quant[i].y2[1] = 8 - } - // The 117 is not a typo. The dequant_init function in the spec's Reference - // Decoder Source Code (http://tools.ietf.org/html/rfc6386#section-9.6 Page 145) - // says to clamp the LHS value at 132, which is equal to dequantTableDC[117]. - d.quant[i].uv[0] = dequantTableDC[clip(q+dquvDC, 0, 117)] - d.quant[i].uv[1] = dequantTableAC[clip(q+dquvAC, 0, 127)] - } -} - -// The dequantization tables are specified in section 14.1. -var ( - dequantTableDC = [128]uint16{ - 4, 5, 6, 7, 8, 9, 10, 10, - 11, 12, 13, 14, 15, 16, 17, 17, - 18, 19, 20, 20, 21, 21, 22, 22, - 23, 23, 24, 25, 25, 26, 27, 28, - 29, 30, 31, 32, 33, 34, 35, 36, - 37, 37, 38, 39, 40, 41, 42, 43, - 44, 45, 46, 46, 47, 48, 49, 50, - 51, 52, 53, 54, 55, 56, 57, 58, - 59, 60, 61, 62, 63, 64, 65, 66, - 67, 68, 69, 70, 71, 72, 73, 74, - 75, 76, 76, 77, 78, 79, 80, 81, - 82, 83, 84, 85, 86, 87, 88, 89, - 91, 93, 95, 96, 98, 100, 101, 102, - 104, 106, 108, 110, 112, 114, 116, 118, - 122, 124, 126, 128, 130, 132, 134, 136, - 138, 140, 143, 145, 148, 151, 154, 157, - } - dequantTableAC = [128]uint16{ - 4, 5, 6, 7, 8, 9, 10, 11, - 12, 13, 14, 15, 16, 17, 18, 19, - 20, 21, 22, 23, 24, 25, 26, 27, - 28, 29, 30, 31, 32, 33, 34, 35, - 36, 37, 38, 39, 40, 41, 42, 43, - 44, 45, 46, 47, 48, 49, 50, 51, - 52, 53, 54, 55, 56, 57, 58, 60, - 62, 64, 66, 68, 70, 72, 74, 76, - 78, 80, 82, 84, 86, 88, 90, 92, - 94, 96, 98, 100, 102, 104, 106, 108, - 110, 112, 114, 116, 119, 122, 125, 128, - 131, 134, 137, 140, 143, 146, 149, 152, - 155, 158, 161, 164, 167, 170, 173, 177, - 181, 185, 189, 193, 197, 201, 205, 209, - 213, 217, 221, 225, 229, 234, 239, 245, - 249, 254, 259, 264, 269, 274, 279, 284, - } -) -- cgit v1.2.3