[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, 102 deletions

diff --git a/vendor/github.com/h2non/filetype/filetype.go b/vendor/github.com/h2non/filetype/filetype.go
deleted file mode 100644
index c99691e5f..000000000
--- a/vendor/github.com/h2non/filetype/filetype.go
+++ /dev/null
@@ -1,102 +0,0 @@
-package filetype
-
-import (
-	"errors"
-
-	"github.com/h2non/filetype/matchers"
-	"github.com/h2non/filetype/types"
-)
-
-// Types stores a map of supported types
-var Types = types.Types
-
-// NewType creates and registers a new type
-var NewType = types.NewType
-
-// Unknown represents an unknown file type
-var Unknown = types.Unknown
-
-// ErrEmptyBuffer represents an empty buffer error
-var ErrEmptyBuffer = errors.New("Empty buffer")
-
-// ErrUnknownBuffer represents a unknown buffer error
-var ErrUnknownBuffer = errors.New("Unknown buffer type")
-
-// AddType registers a new file type
-func AddType(ext, mime string) types.Type {
-	return types.NewType(ext, mime)
-}
-
-// Is checks if a given buffer matches with the given file type extension
-func Is(buf []byte, ext string) bool {
-	kind := types.Get(ext)
-	if kind != types.Unknown {
-		return IsType(buf, kind)
-	}
-	return false
-}
-
-// IsExtension semantic alias to Is()
-func IsExtension(buf []byte, ext string) bool {
-	return Is(buf, ext)
-}
-
-// IsType checks if a given buffer matches with the given file type
-func IsType(buf []byte, kind types.Type) bool {
-	matcher := matchers.Matchers[kind]
-	if matcher == nil {
-		return false
-	}
-	return matcher(buf) != types.Unknown
-}
-
-// IsMIME checks if a given buffer matches with the given MIME type
-func IsMIME(buf []byte, mime string) bool {
-	result := false
-	types.Types.Range(func(k, v interface{}) bool {
-		kind := v.(types.Type)
-		if kind.MIME.Value == mime {
-			matcher := matchers.Matchers[kind]
-			result = matcher(buf) != types.Unknown
-			return false
-		}
-		return true
-	})
-
-	return result
-}
-
-// IsSupported checks if a given file extension is supported
-func IsSupported(ext string) bool {
-	result := false
-	types.Types.Range(func(k, v interface{}) bool {
-		key := k.(string)
-		if key == ext {
-			result = true
-			return false
-		}
-		return true
-	})
-
-	return result
-}
-
-// IsMIMESupported checks if a given MIME type is supported
-func IsMIMESupported(mime string) bool {
-	result := false
-	types.Types.Range(func(k, v interface{}) bool {
-		kind := v.(types.Type)
-		if kind.MIME.Value == mime {
-			result = true
-			return false
-		}
-		return true
-	})
-
-	return result
-}
-
-// GetType retrieves a Type by file extension
-func GetType(ext string) types.Type {
-	return types.Get(ext)
-}