package audio

import "encoding/binary"

// Float64ToPCM16 converts float64 samples [-1.0, 1.0] to signed 16-bit PCM (LittleEndian) bytes.
func Float64ToPCM16(samples []float64) []byte {
	buf := make([]byte, len(samples)*2)
	for i, sample := range samples {
		// Clamp to [-1.0, 1.0]
		if sample > 1.0 {
			sample = 1.0
		} else if sample < -1.0 {
			sample = -1.0
		}
		// Convert to 16-bit PCM
		binary.LittleEndian.PutUint16(buf[i*2:], uint16(int16(sample*32767)))
	}
	return buf
}