ebiten/audio/internal/convert/float32_test.go
2024-09-12 01:17:26 +09:00

114 lines
2.6 KiB
Go

// Copyright 2024 The Ebitengine 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/rand/v2"
"testing"
"unsafe"
"github.com/hajimehoshi/ebiten/v2/audio/internal/convert"
)
func randInt16s(n int) []int16 {
r := make([]int16, n)
for i := range r {
r[i] = int16(rand.IntN(1<<16) - (1 << 15))
}
return r
}
func TestFloat32(t *testing.T) {
type testCase struct {
Name string
In []int16
}
cases := []testCase{
{
Name: "empty",
In: nil,
},
{
Name: "-1, 0, 1",
In: []int16{-32768, 0, 32767},
},
{
Name: "8 0s",
In: []int16{0, 0, 0, 0, 0, 0, 0, 0},
},
{
Name: "random 256 values",
In: randInt16s(256),
},
{
Name: "random 65536 values",
In: randInt16s(65536),
},
}
for _, c := range cases {
c := c
t.Run(c.Name, func(t *testing.T) {
for _, seek := range []bool{false, true} {
seek := seek
name := "nonseek"
if seek {
name = "seek"
}
t.Run(name, func(t *testing.T) {
var in, out []byte
if len(c.In) > 0 {
outF32 := make([]float32, len(c.In))
for i := range c.In {
outF32[i] = float32(c.In[i]) / (1 << 15)
}
in = unsafe.Slice((*byte)(unsafe.Pointer(unsafe.SliceData(c.In))), len(c.In)*2)
out = unsafe.Slice((*byte)(unsafe.Pointer(unsafe.SliceData(outF32))), len(outF32)*4)
}
r := convert.NewFloat32BytesReaderFromInt16BytesReader(bytes.NewReader(in)).(io.ReadSeeker)
var got []byte
for {
var buf [97]byte
n, err := r.Read(buf[:])
got = append(got, buf[:n]...)
if err != nil {
if err != io.EOF {
t.Fatal(err)
}
break
}
if seek {
// Shifting by incomplete bytes should not affect the result.
for i := 0; i < 4; i++ {
if _, err := r.Seek(int64(i), io.SeekCurrent); err != nil {
if err != io.EOF {
t.Fatal(err)
}
break
}
}
}
}
want := out
if !bytes.Equal(got, want) {
t.Errorf("got: %v, want: %v", got, want)
}
})
}
})
}
}