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Remove duplicate count; use models.Couple

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This commit is contained in:
Chigozirim Igweamaka 2024-05-15 04:57:27 +01:00
parent 1006112acb
commit 7a10a179b5
1 changed files with 4 additions and 13 deletions
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17
shazam/fingerprint.go
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@ -1,7 +1,6 @@
package shazam
import (
"fmt"
"song-recognition/models"
)
@ -17,9 +16,8 @@ const (
// The address is calculated based on the frequency of the anchor and target points,
// as well as the delta time between them.
// The table value contains the anchor time and the song ID.
func Fingerprint(peaks []Peak, songID string) map[uint32]models.Table {
fingerprints := map[uint32]models.Table{}
duplicates := 0
func Fingerprint(peaks []Peak, songID uint32) map[uint32]models.Couple {
fingerprints := map[uint32]models.Couple{}
for i, anchor := range peaks {
for j := i + 1; j < len(peaks) && j <= i+targetZoneSize; j++ {
@ -28,24 +26,17 @@ func Fingerprint(peaks []Peak, songID string) map[uint32]models.Table {
address := createAddress(anchor, target)
anchorTimeMs := uint32(anchor.Time * 1000)
_, ok := fingerprints[address]
if ok {
duplicates++
}
fingerprints[address] = models.Table{anchorTimeMs, songID}
fingerprints[address] = models.Couple{anchorTimeMs, songID}
}
}
fmt.Println("Duplicates: ", duplicates)
return fingerprints
}
// createAddress generates a unique address for a pair of anchor and target points.
// The address is a 32-bit integer where certain bits represent the frequency of
// the anchor and target points, and other bits represent the time difference (delta time)
// between them. This function combines these components into a single address.
// between them. This function combines these components into a single address (a hash).
func createAddress(anchor, target Peak) uint32 {
anchorFreq := int(real(anchor.Freq))
targetFreq := int(real(target.Freq))