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Merge pull request #433 from wader/wav-smpl-chunk

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wav: Decode smpl chunk
This commit is contained in:
Mattias Wadman 2022-09-26 12:51:34 +02:00 committed by GitHub
commit d4315322e0
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1 changed files with 28 additions and 0 deletions
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28
format/wav/wav.go
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@ -157,6 +157,34 @@ func decodeChunk(d *decode.D, expectedChunkID string, stringData bool) {
"fact": func(d *decode.D) {
d.FieldU32("sample_length")
},
"smpl": func(d *decode.D) {
d.FieldU32("manufacturer")
d.FieldU32("product")
d.FieldU32("sample_period")
d.FieldU32("midi_unity_note")
d.FieldU32("midi_pitch_fraction")
d.FieldU32("smpte_format")
d.FieldU32("smpte_offset")
numSampleLoops := int(d.FieldU32("number_of_sample_loops"))
samplerDataBytes := int(d.FieldU32("sampler_data_bytes"))
d.FieldArray("samples_loops", func(d *decode.D) {
for i := 0; i < numSampleLoops; i++ {
d.FieldStruct("sample_loop", func(d *decode.D) {
d.FieldUTF8("id", 4)
d.FieldU32("type", scalar.UToSymStr{
0: "forward",
1: "forward_backward",
2: "backward",
})
d.FieldU32("start")
d.FieldU32("end")
d.FieldU32("fraction")
d.FieldU32("number_of_times")
})
}
})
d.FieldRawLen("sampler_data", int64(samplerDataBytes)*8)
},
}
trimChunkID := d.FieldStrFn("id", func(d *decode.D) string {