[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, 88 deletions

diff --git a/vendor/github.com/dsoprea/go-exif/v3/common/testing_common.go b/vendor/github.com/dsoprea/go-exif/v3/common/testing_common.go
deleted file mode 100644
index f04fa22b6..000000000
--- a/vendor/github.com/dsoprea/go-exif/v3/common/testing_common.go
+++ /dev/null
@@ -1,88 +0,0 @@
-package exifcommon
-
-import (
-	"os"
-	"path"
-
-	"encoding/binary"
-	"io/ioutil"
-
-	"github.com/dsoprea/go-logging"
-)
-
-var (
-	moduleRootPath = ""
-
-	testExifData []byte = nil
-
-	// EncodeDefaultByteOrder is the default byte-order for encoding operations.
-	EncodeDefaultByteOrder = binary.BigEndian
-
-	// Default byte order for tests.
-	TestDefaultByteOrder = binary.BigEndian
-)
-
-func GetModuleRootPath() string {
-	if moduleRootPath == "" {
-		moduleRootPath = os.Getenv("EXIF_MODULE_ROOT_PATH")
-		if moduleRootPath != "" {
-			return moduleRootPath
-		}
-
-		currentWd, err := os.Getwd()
-		log.PanicIf(err)
-
-		currentPath := currentWd
-
-		visited := make([]string, 0)
-
-		for {
-			tryStampFilepath := path.Join(currentPath, ".MODULE_ROOT")
-
-			_, err := os.Stat(tryStampFilepath)
-			if err != nil && os.IsNotExist(err) != true {
-				log.Panic(err)
-			} else if err == nil {
-				break
-			}
-
-			visited = append(visited, tryStampFilepath)
-
-			currentPath = path.Dir(currentPath)
-			if currentPath == "/" {
-				log.Panicf("could not find module-root: %v", visited)
-			}
-		}
-
-		moduleRootPath = currentPath
-	}
-
-	return moduleRootPath
-}
-
-func GetTestAssetsPath() string {
-	moduleRootPath := GetModuleRootPath()
-	assetsPath := path.Join(moduleRootPath, "assets")
-
-	return assetsPath
-}
-
-func getTestImageFilepath() string {
-	assetsPath := GetTestAssetsPath()
-	testImageFilepath := path.Join(assetsPath, "NDM_8901.jpg")
-	return testImageFilepath
-}
-
-func getTestExifData() []byte {
-	if testExifData == nil {
-		assetsPath := GetTestAssetsPath()
-		filepath := path.Join(assetsPath, "NDM_8901.jpg.exif")
-
-		var err error
-
-		testExifData, err = ioutil.ReadFile(filepath)
-		log.PanicIf(err)
-	}
-
-	return testExifData
-}