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mirror of https://github.com/wader/fq.git synced 2024-12-23 13:22:58 +03:00
fq/format/vpx/vp9_cfm.go
Mattias Wadman 8e0dde03d0 decode: Support multiple format args and some rename and refactor
This will allow passing both cli options and format options to sub decoder.
Ex: pass keylog option to a tls decoder when decoding a pcap.
Ex: pass decode options to a format inside a http body inside a pcap.

Add ArgAs method to lookup argument based on type. This also makes the format
decode function have same signature as sub decoders in the decode API.

This change decode.Format a bit:
DecodeFn is now just func(d *D) any
DecodeInArg renamed to DefaultInArg
2023-02-18 21:38:51 +01:00

45 lines
1.0 KiB
Go

package vpx
// https://www.webmproject.org/docs/container/#vp9-codec-feature-metadata-codecprivate
import (
"github.com/wader/fq/format"
"github.com/wader/fq/pkg/decode"
"github.com/wader/fq/pkg/interp"
)
func init() {
interp.RegisterFormat(decode.Format{
Name: format.VP9_CFM,
Description: "VP9 Codec Feature Metadata",
DecodeFn: vp9CFMDecode,
RootArray: true,
RootName: "features",
})
}
func vp9CFMDecode(d *decode.D) any {
for d.NotEnd() {
d.FieldStruct("feature", func(d *decode.D) {
id := d.FieldU8("id", vp9FeatureIDNames)
l := d.FieldU8("length")
d.FramedFn(int64(l)*8, func(d *decode.D) {
switch id {
case vp9FeatureProfile:
d.FieldU8("profile")
case vp9FeatureLevel:
d.FieldU8("level", vpxLevelNames)
case vp9FeatureBitDepth:
d.FieldU8("bit_depth")
case vp9FeatureChromaSubsampling:
d.FieldU8("chroma_subsampling", vpxChromeSubsamplingNames)
default:
d.FieldRawLen("data", d.BitsLeft())
}
})
})
}
return nil
}