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46 lines
1022 B
Go
46 lines
1022 B
Go
package vpx
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// https://www.webmproject.org/docs/container/#vp9-codec-feature-metadata-codecprivate
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import (
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"github.com/wader/fq/format"
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"github.com/wader/fq/pkg/decode"
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"github.com/wader/fq/pkg/interp"
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)
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func init() {
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interp.RegisterFormat(
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format.VP9_CFM,
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&decode.Format{
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Description: "VP9 Codec Feature Metadata",
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DecodeFn: vp9CFMDecode,
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RootArray: true,
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RootName: "features",
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})
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}
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func vp9CFMDecode(d *decode.D) any {
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for d.NotEnd() {
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d.FieldStruct("feature", func(d *decode.D) {
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id := d.FieldU8("id", vp9FeatureIDNames)
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l := d.FieldU8("length")
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d.FramedFn(int64(l)*8, func(d *decode.D) {
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switch id {
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case vp9FeatureProfile:
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d.FieldU8("profile")
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case vp9FeatureLevel:
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d.FieldU8("level", vpxLevelNames)
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case vp9FeatureBitDepth:
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d.FieldU8("bit_depth")
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case vp9FeatureChromaSubsampling:
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d.FieldU8("chroma_subsampling", vpxChromeSubsamplingNames)
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default:
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d.FieldRawLen("data", d.BitsLeft())
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}
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})
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})
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}
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return nil
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}
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