[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

vendor/codeberg.org/gruf/go-ffmpreg/embed/ffmpeg/lib.go

@@ -0,0 +1,38 @@
+package ffmpeg
+
+import (
+	_ "embed"
+	"os"
+
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/experimental"
+)
+
+func init() {
+	// Check for WASM source file path.
+	path := os.Getenv("FFMPEG_WASM")
+	if path == "" {
+		return
+	}
+
+	var err error
+
+	// Read file into memory.
+	B, err = os.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// CoreFeatures is the WebAssembly Core specification
+// features this embedded binary was compiled with.
+const CoreFeatures = api.CoreFeatureSIMD |
+	api.CoreFeatureBulkMemoryOperations |
+	api.CoreFeatureNonTrappingFloatToIntConversion |
+	api.CoreFeatureMutableGlobal |
+	api.CoreFeatureReferenceTypes |
+	api.CoreFeatureSignExtensionOps |
+	experimental.CoreFeaturesThreads
+
+//go:embed ffmpeg.wasm
+var B []byte

vendor/codeberg.org/gruf/go-ffmpreg/embed/ffprobe/lib.go

@@ -0,0 +1,38 @@
+package ffprobe
+
+import (
+	_ "embed"
+	"os"
+
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/experimental"
+)
+
+func init() {
+	// Check for WASM source file path.
+	path := os.Getenv("FFPROBE_WASM")
+	if path == "" {
+		return
+	}
+
+	var err error
+
+	// Read file into memory.
+	B, err = os.ReadFile(path)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// CoreFeatures is the WebAssembly Core specification
+// features this embedded binary was compiled with.
+const CoreFeatures = api.CoreFeatureSIMD |
+	api.CoreFeatureBulkMemoryOperations |
+	api.CoreFeatureNonTrappingFloatToIntConversion |
+	api.CoreFeatureMutableGlobal |
+	api.CoreFeatureReferenceTypes |
+	api.CoreFeatureSignExtensionOps |
+	experimental.CoreFeaturesThreads
+
+//go:embed ffprobe.wasm
+var B []byte