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

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* 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
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198
vendor/github.com/golang/geo/r3/precisevector.go generated vendored
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@ -1,198 +0,0 @@
// Copyright 2016 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 r3
import (
"fmt"
"math/big"
)
const (
// prec is the number of bits of precision to use for the Float values.
// To keep things simple, we use the maximum allowable precision on big
// values. This allows us to handle all values we expect in the s2 library.
prec = big.MaxPrec
)
// define some commonly referenced values.
var (
precise0 = precInt(0)
precise1 = precInt(1)
)
// precStr wraps the conversion from a string into a big.Float. For results that
// actually can be represented exactly, this should only be used on values that
// are integer multiples of integer powers of 2.
func precStr(s string) *big.Float {
// Explicitly ignoring the bool return for this usage.
f, _ := new(big.Float).SetPrec(prec).SetString(s)
return f
}
func precInt(i int64) *big.Float {
return new(big.Float).SetPrec(prec).SetInt64(i)
}
func precFloat(f float64) *big.Float {
return new(big.Float).SetPrec(prec).SetFloat64(f)
}
func precAdd(a, b *big.Float) *big.Float {
return new(big.Float).SetPrec(prec).Add(a, b)
}
func precSub(a, b *big.Float) *big.Float {
return new(big.Float).SetPrec(prec).Sub(a, b)
}
func precMul(a, b *big.Float) *big.Float {
return new(big.Float).SetPrec(prec).Mul(a, b)
}
// PreciseVector represents a point in ℝ³ using high-precision values.
// Note that this is NOT a complete implementation because there are some
// operations that Vector supports that are not feasible with arbitrary precision
// math. (e.g., methods that need division like Normalize, or methods needing a
// square root operation such as Norm)
type PreciseVector struct {
X, Y, Z *big.Float
}
// PreciseVectorFromVector creates a high precision vector from the given Vector.
func PreciseVectorFromVector(v Vector) PreciseVector {
return NewPreciseVector(v.X, v.Y, v.Z)
}
// NewPreciseVector creates a high precision vector from the given floating point values.
func NewPreciseVector(x, y, z float64) PreciseVector {
return PreciseVector{
X: precFloat(x),
Y: precFloat(y),
Z: precFloat(z),
}
}
// Vector returns this precise vector converted to a Vector.
func (v PreciseVector) Vector() Vector {
// The accuracy flag is ignored on these conversions back to float64.
x, _ := v.X.Float64()
y, _ := v.Y.Float64()
z, _ := v.Z.Float64()
return Vector{x, y, z}.Normalize()
}
// Equal reports whether v and ov are equal.
func (v PreciseVector) Equal(ov PreciseVector) bool {
return v.X.Cmp(ov.X) == 0 && v.Y.Cmp(ov.Y) == 0 && v.Z.Cmp(ov.Z) == 0
}
func (v PreciseVector) String() string {
return fmt.Sprintf("(%10g, %10g, %10g)", v.X, v.Y, v.Z)
}
// Norm2 returns the square of the norm.
func (v PreciseVector) Norm2() *big.Float { return v.Dot(v) }
// IsUnit reports whether this vector is of unit length.
func (v PreciseVector) IsUnit() bool {
return v.Norm2().Cmp(precise1) == 0
}
// Abs returns the vector with nonnegative components.
func (v PreciseVector) Abs() PreciseVector {
return PreciseVector{
X: new(big.Float).Abs(v.X),
Y: new(big.Float).Abs(v.Y),
Z: new(big.Float).Abs(v.Z),
}
}
// Add returns the standard vector sum of v and ov.
func (v PreciseVector) Add(ov PreciseVector) PreciseVector {
return PreciseVector{
X: precAdd(v.X, ov.X),
Y: precAdd(v.Y, ov.Y),
Z: precAdd(v.Z, ov.Z),
}
}
// Sub returns the standard vector difference of v and ov.
func (v PreciseVector) Sub(ov PreciseVector) PreciseVector {
return PreciseVector{
X: precSub(v.X, ov.X),
Y: precSub(v.Y, ov.Y),
Z: precSub(v.Z, ov.Z),
}
}
// Mul returns the standard scalar product of v and f.
func (v PreciseVector) Mul(f *big.Float) PreciseVector {
return PreciseVector{
X: precMul(v.X, f),
Y: precMul(v.Y, f),
Z: precMul(v.Z, f),
}
}
// MulByFloat64 returns the standard scalar product of v and f.
func (v PreciseVector) MulByFloat64(f float64) PreciseVector {
return v.Mul(precFloat(f))
}
// Dot returns the standard dot product of v and ov.
func (v PreciseVector) Dot(ov PreciseVector) *big.Float {
return precAdd(precMul(v.X, ov.X), precAdd(precMul(v.Y, ov.Y), precMul(v.Z, ov.Z)))
}
// Cross returns the standard cross product of v and ov.
func (v PreciseVector) Cross(ov PreciseVector) PreciseVector {
return PreciseVector{
X: precSub(precMul(v.Y, ov.Z), precMul(v.Z, ov.Y)),
Y: precSub(precMul(v.Z, ov.X), precMul(v.X, ov.Z)),
Z: precSub(precMul(v.X, ov.Y), precMul(v.Y, ov.X)),
}
}
// LargestComponent returns the axis that represents the largest component in this vector.
func (v PreciseVector) LargestComponent() Axis {
t := v.Abs()
if t.X.Cmp(t.Y) > 0 {
if t.X.Cmp(t.Z) > 0 {
return XAxis
}
return ZAxis
}
if t.Y.Cmp(t.Z) > 0 {
return YAxis
}
return ZAxis
}
// SmallestComponent returns the axis that represents the smallest component in this vector.
func (v PreciseVector) SmallestComponent() Axis {
t := v.Abs()
if t.X.Cmp(t.Y) < 0 {
if t.X.Cmp(t.Z) < 0 {
return XAxis
}
return ZAxis
}
if t.Y.Cmp(t.Z) < 0 {
return YAxis
}
return ZAxis
}