mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 11:48:55 +01:00
112 lines
2.0 KiB
Go
112 lines
2.0 KiB
Go
// Copyright 2019 The Ebiten Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package convert_test
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"math"
|
|
"testing"
|
|
|
|
. "github.com/hajimehoshi/ebiten/audio/internal/convert"
|
|
)
|
|
|
|
type f32reader struct {
|
|
data []float32
|
|
pos int
|
|
}
|
|
|
|
func (f *f32reader) Read(buf []float32) (int, error) {
|
|
if f.pos == len(f.data) {
|
|
return 0, io.EOF
|
|
}
|
|
n := copy(buf, f.data[f.pos:])
|
|
f.pos += n
|
|
return n, nil
|
|
}
|
|
|
|
func newFloat32Reader(data []float32) Float32Reader {
|
|
return &f32reader{data: data}
|
|
}
|
|
|
|
func TestFloat32Reader(t *testing.T) {
|
|
in1 := make([]float32, 256)
|
|
for i := range in1 {
|
|
in1[i] = float32(math.Sin(float64(i)))
|
|
}
|
|
in2 := make([]float32, 65536)
|
|
for i := range in2 {
|
|
in2[i] = float32(math.Cos(float64(i)))
|
|
}
|
|
|
|
cases := []struct {
|
|
In []float32
|
|
N int
|
|
}{
|
|
{
|
|
In: in1,
|
|
N: 1,
|
|
},
|
|
{
|
|
In: in1,
|
|
N: 2,
|
|
},
|
|
{
|
|
In: in1,
|
|
N: 3,
|
|
},
|
|
{
|
|
In: in1,
|
|
N: 1024,
|
|
},
|
|
{
|
|
In: in2,
|
|
N: 1,
|
|
},
|
|
{
|
|
In: in2,
|
|
N: 4096,
|
|
},
|
|
}
|
|
|
|
for i, c := range cases {
|
|
r := NewReaderFromFloat32Reader(newFloat32Reader(c.In))
|
|
|
|
got := []byte{}
|
|
for {
|
|
buf := make([]byte, c.N)
|
|
n, err := r.Read(buf)
|
|
if err != nil {
|
|
if n == 0 && err == io.EOF {
|
|
break
|
|
}
|
|
t.Fatal(err)
|
|
}
|
|
got = append(got, buf[:n]...)
|
|
}
|
|
|
|
want := make([]byte, len(c.In)*2)
|
|
for i, f := range c.In {
|
|
s := int16(f * (1<<15 - 1))
|
|
want[2*i] = byte(s)
|
|
want[2*i+1] = byte(s >> 8)
|
|
}
|
|
|
|
if !bytes.Equal(got, want) {
|
|
t.Errorf("case: %d, got: %v, want: %v", i, got, want)
|
|
}
|
|
}
|
|
}
|