Add MediaConvertWebPToPNG option (telegram). (#741)

* Add MediaConvertWebPToPNG option (telegram).

When enabled matterbridge will convert .webp files to .png files
before uploading them to the mediaserver of the other bridges.

Fixes #398

1 files changed, 381 insertions, 0 deletions

diff --git a/vendor/golang.org/x/image/vp8/token.go b/vendor/golang.org/x/image/vp8/token.go
new file mode 100644
index 00000000..da99cf0f
--- /dev/null
+++ b/vendor/golang.org/x/image/vp8/token.go
@@ -0,0 +1,381 @@
+// 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 contains token probabilities for decoding DCT/WHT coefficients, as
+// specified in chapter 13.
+
+func (d *Decoder) parseTokenProb() {
+	for i := range d.tokenProb {
+		for j := range d.tokenProb[i] {
+			for k := range d.tokenProb[i][j] {
+				for l := range d.tokenProb[i][j][k] {
+					if d.fp.readBit(tokenProbUpdateProb[i][j][k][l]) {
+						d.tokenProb[i][j][k][l] = uint8(d.fp.readUint(uniformProb, 8))
+					}
+				}
+			}
+		}
+	}
+}
+
+// The plane enumeration is specified in section 13.3.
+const (
+	planeY1WithY2 = iota
+	planeY2
+	planeUV
+	planeY1SansY2
+	nPlane
+)
+
+const (
+	nBand    = 8
+	nContext = 3
+	nProb    = 11
+)
+
+// Token probability update probabilities are specified in section 13.4.
+var tokenProbUpdateProb = [nPlane][nBand][nContext][nProb]uint8{
+	{
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255},
+			{249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255},
+			{234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
+			{250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
+			{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+	},
+	{
+		{
+			{217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
+			{234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255},
+		},
+		{
+			{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+			{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+	},
+	{
+		{
+			{186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
+			{234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
+			{251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255},
+		},
+		{
+			{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+	},
+	{
+		{
+			{248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
+			{248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+			{246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+			{252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
+			{248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+			{253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+			{252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
+			{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+		{
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+			{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
+		},
+	},
+}
+
+// Default token probabilities are specified in section 13.5.
+var defaultTokenProb = [nPlane][nBand][nContext][nProb]uint8{
+	{
+		{
+			{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+			{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+			{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+		{
+			{253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
+			{189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
+			{106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128},
+		},
+		{
+			{1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
+			{181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
+			{78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128},
+		},
+		{
+			{1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
+			{184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
+			{77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128},
+		},
+		{
+			{1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
+			{170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
+			{37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128},
+		},
+		{
+			{1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
+			{207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
+			{102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128},
+		},
+		{
+			{1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
+			{177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
+			{80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128},
+		},
+		{
+			{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+			{246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+			{255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+	},
+	{
+		{
+			{198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
+			{131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
+			{68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128},
+		},
+		{
+			{1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
+			{184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
+			{81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128},
+		},
+		{
+			{1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
+			{99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
+			{23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128},
+		},
+		{
+			{1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
+			{109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
+			{44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128},
+		},
+		{
+			{1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
+			{94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
+			{22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128},
+		},
+		{
+			{1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
+			{124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
+			{35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128},
+		},
+		{
+			{1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
+			{121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
+			{45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128},
+		},
+		{
+			{1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
+			{203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
+			{137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128},
+		},
+	},
+	{
+		{
+			{253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
+			{175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
+			{73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128},
+		},
+		{
+			{1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
+			{239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
+			{155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128},
+		},
+		{
+			{1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
+			{201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
+			{69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128},
+		},
+		{
+			{1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
+			{223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
+			{141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128},
+		},
+		{
+			{1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
+			{190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
+			{149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+		{
+			{1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+			{247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+			{240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+		{
+			{1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
+			{213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
+			{55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+		{
+			{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+			{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+			{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+	},
+	{
+		{
+			{202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
+			{126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
+			{61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128},
+		},
+		{
+			{1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
+			{166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
+			{39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128},
+		},
+		{
+			{1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
+			{124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
+			{24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128},
+		},
+		{
+			{1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
+			{149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
+			{28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128},
+		},
+		{
+			{1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
+			{123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
+			{20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128},
+		},
+		{
+			{1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
+			{168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
+			{47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128},
+		},
+		{
+			{1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
+			{141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
+			{42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128},
+		},
+		{
+			{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+			{244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+			{238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
+		},
+	},
+}