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Stretch samples a bit better with the GBA's 32768Hz

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This commit is contained in:
Sergey Stepanov 2024-12-07 00:47:27 +03:00
parent 6bb82b2204
commit f54089e072
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GPG key ID: A56B4929BAA8556B
2 changed files with 9 additions and 5 deletions
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3
pkg/worker/media/media.go
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@ -82,8 +82,9 @@ func DefaultOpus() (*opus.Encoder, error) {
}
// frame calculates an audio stereo frame size, i.e. 48k*frame/1000*2
// with round(x / 2) * 2 for the closest even number
func frame(hz int, frame float32) int {
return int(math.Round(float64(hz) * float64(frame) / 1000 * 2))
return int(math.Round(float64(hz)*float64(frame)/1000/2) * 2 * 2)
}
// stretch does a simple stretching of audio samples.

11
pkg/worker/media/media_test.go
View file

@ -192,7 +192,7 @@ func TestBufferWrite(t *testing.T) {
buf.write(samplesOf(w.sample, w.len), func(s samples) { lastResult = s })
}
if !reflect.DeepEqual(test.expect, lastResult) {
t.Errorf("not expted buffer, %v != %v", lastResult, test.expect)
t.Errorf("not expted buffer, %v != %v, %v", lastResult, test.expect, buf.s)
}
}
}
@ -217,17 +217,20 @@ func samplesOf(v int16, len int) (s samples) {
return
}
func Test_frame(t *testing.T) {
func TestFrame(t *testing.T) {
type args struct {
hz int
frame int
frame float32
}
tests := []struct {
name string
args args
want int
}{
{name: "mGBA", args: args{hz: 32768, frame: 10}, want: 654},
{name: "mGBA", args: args{hz: 32768, frame: 10}, want: 656},
{name: "mGBA", args: args{hz: 32768, frame: 5}, want: 328},
{name: "mGBA", args: args{hz: 32768, frame: 2.5}, want: 164},
{name: "nes", args: args{hz: 48000, frame: 2.5}, want: 240},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {