[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, 149 deletions

diff --git a/vendor/github.com/golang/geo/s2/distance_target.go b/vendor/github.com/golang/geo/s2/distance_target.go
deleted file mode 100644
index 066bbacfa..000000000
--- a/vendor/github.com/golang/geo/s2/distance_target.go
+++ /dev/null
@@ -1,149 +0,0 @@
-// Copyright 2019 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
-
-import (
-	"github.com/golang/geo/s1"
-)
-
-// The distance interface represents a set of common methods used by algorithms
-// that compute distances between various S2 types.
-type distance interface {
-	// chordAngle returns this type as a ChordAngle.
-	chordAngle() s1.ChordAngle
-
-	// fromChordAngle is used to type convert a ChordAngle to this type.
-	// This is to work around needing to be clever in parts of the code
-	// where a distanceTarget interface method expects distances, but the
-	// user only supplies a ChordAngle, and we need to dynamically cast it
-	// to an appropriate distance interface types.
-	fromChordAngle(o s1.ChordAngle) distance
-
-	// zero returns a zero distance.
-	zero() distance
-	// negative returns a value smaller than any valid value.
-	negative() distance
-	// infinity returns a value larger than any valid value.
-	infinity() distance
-
-	// less is similar to the Less method in Sort. To get minimum values,
-	// this would be a less than type operation. For maximum, this would
-	// be a greater than type operation.
-	less(other distance) bool
-
-	// sub subtracts the other value from this one and returns the new value.
-	// This is done as a method and not simple mathematical operation to
-	// allow closest and furthest to implement this in opposite ways.
-	sub(other distance) distance
-
-	// chordAngleBound reports the upper bound on a ChordAngle corresponding
-	// to this distance. For example, if distance measures WGS84 ellipsoid
-	// distance then the corresponding angle needs to be 0.56% larger.
-	chordAngleBound() s1.ChordAngle
-
-	// updateDistance may update the value this distance represents
-	// based on the given input. The updated value and a boolean reporting
-	// if the value was changed are returned.
-	updateDistance(other distance) (distance, bool)
-}
-
-// distanceTarget is an interface that represents a geometric type to which distances
-// are measured.
-//
-// For example, there are implementations that measure distances to a Point,
-// an Edge, a Cell, a CellUnion, and even to an arbitrary collection of geometry
-// stored in ShapeIndex.
-//
-// The distanceTarget types are provided for the benefit of types that measure
-// distances and/or find nearby geometry, such as ClosestEdgeQuery, FurthestEdgeQuery,
-// ClosestPointQuery, and ClosestCellQuery, etc.
-type distanceTarget interface {
-	// capBound returns a Cap that bounds the set of points whose distance to the
-	// target is distance.zero().
-	capBound() Cap
-
-	// updateDistanceToPoint updates the distance if the distance to
-	// the point P is within than the given dist.
-	// The boolean reports if the value was updated.
-	updateDistanceToPoint(p Point, dist distance) (distance, bool)
-
-	// updateDistanceToEdge updates the distance if the distance to
-	// the edge E is within than the given dist.
-	// The boolean reports if the value was updated.
-	updateDistanceToEdge(e Edge, dist distance) (distance, bool)
-
-	// updateDistanceToCell updates the distance if the distance to the cell C
-	// (including its interior) is within than the given dist.
-	// The boolean reports if the value was updated.
-	updateDistanceToCell(c Cell, dist distance) (distance, bool)
-
-	// setMaxError potentially updates the value of MaxError, and reports if
-	// the specific type supports altering it. Whenever one of the
-	// updateDistanceTo... methods above returns true, the returned distance
-	// is allowed to be up to maxError larger than the true minimum distance.
-	// In other words, it gives this target object permission to terminate its
-	// distance calculation as soon as it has determined that (1) the minimum
-	// distance is less than minDist and (2) the best possible further
-	// improvement is less than maxError.
-	//
-	// If the target takes advantage of maxError to optimize its distance
-	// calculation, this method must return true. (Most target types will
-	// default to return false.)
-	setMaxError(maxErr s1.ChordAngle) bool
-
-	// maxBruteForceIndexSize reports the maximum number of indexed objects for
-	// which it is faster to compute the distance by brute force (e.g., by testing
-	// every edge) rather than by using an index.
-	//
-	// The following method is provided as a convenience for types that compute
-	// distances to a collection of indexed geometry, such as ClosestEdgeQuery
-	// and ClosestPointQuery.
-	//
-	// Types that do not support this should return a -1.
-	maxBruteForceIndexSize() int
-
-	// distance returns an instance of the underlying distance type this
-	// target uses. This is to work around the use of Templates in the C++.
-	distance() distance
-
-	// visitContainingShapes finds all polygons in the given index that
-	// completely contain a connected component of the target geometry. (For
-	// example, if the target consists of 10 points, this method finds
-	// polygons that contain any of those 10 points.) For each such polygon,
-	// the visit function is called with the Shape of the polygon along with
-	// a point of the target geometry that is contained by that polygon.
-	//
-	// Optionally, any polygon that intersects the target geometry may also be
-	// returned.  In other words, this method returns all polygons that
-	// contain any connected component of the target, along with an arbitrary
-	// subset of the polygons that intersect the target.
-	//
-	// For example, suppose that the index contains two abutting polygons
-	// A and B. If the target consists of two points "a" contained by A and
-	// "b" contained by B, then both A and B are returned. But if the target
-	// consists of the edge "ab", then any subset of {A, B} could be returned
-	// (because both polygons intersect the target but neither one contains
-	// the edge "ab").
-	//
-	// If the visit function returns false, this method terminates early and
-	// returns false as well. Otherwise returns true.
-	//
-	// NOTE(roberts): This method exists only for the purpose of implementing
-	// edgeQuery IncludeInteriors efficiently.
-	visitContainingShapes(index *ShapeIndex, v shapePointVisitorFunc) bool
-}
-
-// shapePointVisitorFunc defines a type of function the visitContainingShapes can call.
-type shapePointVisitorFunc func(containingShape Shape, targetPoint Point) bool