mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-04 06:03:37 +01:00
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
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
package util
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import (
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"context"
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"os"
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"path"
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"strconv"
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"time"
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"github.com/tetratelabs/wazero/api"
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)
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// Wasm_Tempnam wraps Go_Tempnam to fulfill wazero's api.GoModuleFunc,
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// the argument definition is (i32, i32) and return definition is (i32).
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// NOTE: the calling module MUST have access to exported malloc / free.
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func Wasm_Tempnam(ctx context.Context, mod api.Module, stack []uint64) {
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dirptr := api.DecodeU32(stack[0])
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pfxptr := api.DecodeU32(stack[1])
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dir := readString(ctx, mod, dirptr, 0)
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pfx := readString(ctx, mod, pfxptr, 0)
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tmpstr := Go_Tempnam(dir, pfx)
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tmpptr := writeString(ctx, mod, tmpstr)
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stack[0] = api.EncodeU32(tmpptr)
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}
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// Go_Tempname is functionally similar to C's tempnam.
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func Go_Tempnam(dir, prefix string) string {
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now := time.Now().Unix()
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prefix = path.Join(dir, prefix)
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for i := 0; i < 1000; i++ {
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n := murmur2(uint32(now + int64(i)))
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name := prefix + strconv.FormatUint(uint64(n), 10)
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_, err := os.Stat(name)
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if err == nil {
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continue
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} else if os.IsNotExist(err) {
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return name
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} else {
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panic(err)
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}
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}
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panic("too many attempts")
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}
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// murmur2 is a simple uint32 murmur2 hash
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// impl with fixed seed and input size.
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func murmur2(k uint32) (h uint32) {
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const (
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// seed ^ bitlen
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s = uint32(2147483647) ^ 8
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M = 0x5bd1e995
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R = 24
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)
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h = s
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k *= M
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k ^= k >> R
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k *= M
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h *= M
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h ^= k
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h ^= h >> 13
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h *= M
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h ^= h >> 15
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return
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}
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