382 lines
13 KiB
Go
382 lines
13 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package vp8
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// This file contains token probabilities for decoding DCT/WHT coefficients, as
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// specified in chapter 13.
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func (d *Decoder) parseTokenProb() {
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for i := range d.tokenProb {
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for j := range d.tokenProb[i] {
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for k := range d.tokenProb[i][j] {
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for l := range d.tokenProb[i][j][k] {
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if d.fp.readBit(tokenProbUpdateProb[i][j][k][l]) {
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d.tokenProb[i][j][k][l] = uint8(d.fp.readUint(uniformProb, 8))
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}
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}
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}
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}
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}
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}
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// The plane enumeration is specified in section 13.3.
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const (
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planeY1WithY2 = iota
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planeY2
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planeUV
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planeY1SansY2
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nPlane
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)
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const (
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nBand = 8
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nContext = 3
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nProb = 11
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)
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// Token probability update probabilities are specified in section 13.4.
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var tokenProbUpdateProb = [nPlane][nBand][nContext][nProb]uint8{
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{
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255},
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{249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255},
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{234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
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{250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
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{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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},
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{
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{
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{217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
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{234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255},
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},
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{
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{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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},
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{
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{
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{186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
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{234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
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{251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255},
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},
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{
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{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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},
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{
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{
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{248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
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{248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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{246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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{252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
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{248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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{253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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{252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
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{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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{
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
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},
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},
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}
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// Default token probabilities are specified in section 13.5.
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var defaultTokenProb = [nPlane][nBand][nContext][nProb]uint8{
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{
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{
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{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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{
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{253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
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{189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
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{106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128},
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},
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{
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{1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
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{181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
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{78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128},
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},
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{
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{1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
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{184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
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{77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128},
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},
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{
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{1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
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{170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
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{37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128},
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},
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{
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{1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
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{207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
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{102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128},
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},
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{
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{1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
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{177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
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{80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128},
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},
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{
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{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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{246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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{255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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},
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{
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{
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{198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
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{131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
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{68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128},
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},
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{
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{1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
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{184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
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{81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128},
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},
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{
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{1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
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{99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
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{23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128},
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},
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{
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{1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
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{109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
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{44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128},
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},
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{
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{1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
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{94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
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{22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128},
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},
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{
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{1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
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{124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
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{35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128},
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},
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{
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{1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
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{121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
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{45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128},
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},
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{
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{1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
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{203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
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{137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128},
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},
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},
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{
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{
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{253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
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{175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
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{73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128},
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},
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{
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{1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
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{239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
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{155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128},
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},
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{
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{1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
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{201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
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{69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128},
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},
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{
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{1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
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{223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
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{141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128},
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},
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{
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{1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
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{190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
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{149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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{
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{1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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{247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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{240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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{
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{1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
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{213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
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{55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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{
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{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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},
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{
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{
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{202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
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{126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
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{61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128},
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},
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{
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{1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
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{166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
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{39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128},
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},
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{
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{1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
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{124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
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{24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128},
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},
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{
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{1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
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{149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
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{28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128},
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},
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{
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{1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
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{123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
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{20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128},
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},
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{
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{1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
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{168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
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{47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128},
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},
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{
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{1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
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{141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
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{42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128},
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},
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{
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{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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{244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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{238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
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},
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},
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}
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