mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2025-10-29 09:32:24 -05:00
cde2fb6244* 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
81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package util
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import (
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"bytes"
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"context"
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"github.com/tetratelabs/wazero/api"
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)
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// NOTE:
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// the below functions are not very well optimized
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// for repeated calls. this is relying on the fact
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// that the only place they get used (tempnam), is
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// not called very often, should only be once per run
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// so calls to ExportedFunction() and Call() instead
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// of caching api.Function and using CallWithStack()
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// will work out the same (if only called once).
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// maxaddr is the maximum
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// wasm32 memory address.
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const maxaddr = ^uint32(0)
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func malloc(ctx context.Context, mod api.Module, sz uint32) uint32 {
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stack, err := mod.ExportedFunction("malloc").Call(ctx, uint64(sz))
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if err != nil {
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panic(err)
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}
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ptr := api.DecodeU32(stack[0])
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if ptr == 0 {
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panic("out of memory")
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}
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return ptr
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}
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func free(ctx context.Context, mod api.Module, ptr uint32) {
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if ptr != 0 {
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mod.ExportedFunction("free").Call(ctx, uint64(ptr))
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}
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}
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func view(ctx context.Context, mod api.Module, ptr uint32, n uint32) []byte {
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if n == 0 {
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n = maxaddr - ptr
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}
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mem := mod.Memory()
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b, ok := mem.Read(ptr, n)
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if !ok {
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panic("out of range")
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}
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return b
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}
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func read(ctx context.Context, mod api.Module, ptr, n uint32) []byte {
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return bytes.Clone(view(ctx, mod, ptr, n))
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}
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func readString(ctx context.Context, mod api.Module, ptr, n uint32) string {
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return string(view(ctx, mod, ptr, n))
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}
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func write(ctx context.Context, mod api.Module, b []byte) uint32 {
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mem := mod.Memory()
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len := uint32(len(b))
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ptr := malloc(ctx, mod, len)
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ok := mem.Write(ptr, b)
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if !ok {
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panic("out of range")
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}
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return ptr
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}
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func writeString(ctx context.Context, mod api.Module, str string) uint32 {
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mem := mod.Memory()
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len := uint32(len(str) + 1)
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ptr := malloc(ctx, mod, len)
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ok := mem.WriteString(ptr, str)
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if !ok {
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panic("out of range")
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}
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return ptr
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}
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