[feature] support processing of (many) more media types (#3090)

* initial work replacing our media decoding / encoding pipeline with ffprobe + ffmpeg

* specify the video codec to use when generating static image from emoji

* update go-storage library (fixes incompatibility after updating go-iotools)

* maintain image aspect ratio when generating a thumbnail for it

* update readme to show go-ffmpreg

* fix a bunch of media tests, move filesize checking to callers of media manager for more flexibility

* remove extra debug from error message

* fix up incorrect function signatures

* update PutFile to just use regular file copy, as changes are file is on separate partition

* fix remaining tests, remove some unneeded tests now we're working with ffmpeg/ffprobe

* update more tests, add more code comments

* add utilities to generate processed emoji / media outputs

* fix remaining tests

* add test for opus media file, add license header to utility cmds

* limit the number of concurrently available ffmpeg / ffprobe instances

* reduce number of instances

* further reduce number of instances

* fix envparsing test with configuration variables

* update docs and configuration with new media-{local,remote}-max-size variables

1 files changed, 0 insertions, 63 deletions

diff --git a/vendor/github.com/golang/geo/s2/contains_vertex_query.go b/vendor/github.com/golang/geo/s2/contains_vertex_query.go
deleted file mode 100644
index 8e74f9e5b..000000000
--- a/vendor/github.com/golang/geo/s2/contains_vertex_query.go
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2017 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package s2
-
-// ContainsVertexQuery is used to track the edges entering and leaving the
-// given vertex of a Polygon in order to be able to determine if the point is
-// contained by the Polygon.
-//
-// Point containment is defined according to the semi-open boundary model
-// which means that if several polygons tile the region around a vertex,
-// then exactly one of those polygons contains that vertex.
-type ContainsVertexQuery struct {
-	target  Point
-	edgeMap map[Point]int
-}
-
-// NewContainsVertexQuery returns a new query for the given vertex whose
-// containment will be determined.
-func NewContainsVertexQuery(target Point) *ContainsVertexQuery {
-	return &ContainsVertexQuery{
-		target:  target,
-		edgeMap: make(map[Point]int),
-	}
-}
-
-// AddEdge adds the edge between target and v with the given direction.
-// (+1 = outgoing, -1 = incoming, 0 = degenerate).
-func (q *ContainsVertexQuery) AddEdge(v Point, direction int) {
-	q.edgeMap[v] += direction
-}
-
-// ContainsVertex reports a +1 if the target vertex is contained, -1 if it is
-// not contained, and 0 if the incident edges consisted of matched sibling pairs.
-func (q *ContainsVertexQuery) ContainsVertex() int {
-	// Find the unmatched edge that is immediately clockwise from Ortho(P).
-	referenceDir := Point{q.target.Ortho()}
-
-	bestPoint := referenceDir
-	bestDir := 0
-
-	for k, v := range q.edgeMap {
-		if v == 0 {
-			continue // This is a "matched" edge.
-		}
-		if OrderedCCW(referenceDir, bestPoint, k, q.target) {
-			bestPoint = k
-			bestDir = v
-		}
-	}
-	return bestDir
-}