mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
115 lines
2.7 KiB
Go
115 lines
2.7 KiB
Go
// Copyright 2024 The Ebitengine Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package convert_test
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import (
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"bytes"
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"io"
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"math/rand" // TODO: Use math/rand/v2 when the minimum supported version becomes Go 1.22.
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"testing"
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"unsafe"
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"github.com/hajimehoshi/ebiten/v2/audio/internal/convert"
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)
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func randInt16s(n int) []int16 {
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r := make([]int16, n)
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for i := range r {
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r[i] = int16(rand.Intn(1<<16) - (1 << 15))
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}
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return r
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}
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func TestFloat32(t *testing.T) {
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type testCase struct {
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Name string
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In []int16
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}
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cases := []testCase{
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{
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Name: "empty",
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In: nil,
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},
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{
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Name: "-1, 0, 1",
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In: []int16{-32768, 0, 32767},
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},
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{
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Name: "8 0s",
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In: []int16{0, 0, 0, 0, 0, 0, 0, 0},
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},
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{
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Name: "random 256 values",
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In: randInt16s(256),
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},
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{
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Name: "random 65536 values",
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In: randInt16s(65536),
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},
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}
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for _, c := range cases {
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c := c
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t.Run(c.Name, func(t *testing.T) {
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for _, seek := range []bool{false, true} {
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seek := seek
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name := "nonseek"
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if seek {
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name = "seek"
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}
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t.Run(name, func(t *testing.T) {
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// Note that unsafe.SliceData is available as of Go 1.20.
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var in, out []byte
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if len(c.In) > 0 {
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outF32 := make([]float32, len(c.In))
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for i := range c.In {
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outF32[i] = float32(c.In[i]) / (1 << 15)
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}
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in = unsafe.Slice((*byte)(unsafe.Pointer(&c.In[0])), len(c.In)*2)
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out = unsafe.Slice((*byte)(unsafe.Pointer(&outF32[0])), len(outF32)*4)
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}
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r := convert.NewFloat32BytesReaderFromInt16BytesReader(bytes.NewReader(in)).(io.ReadSeeker)
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var got []byte
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for {
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var buf [97]byte
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n, err := r.Read(buf[:])
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got = append(got, buf[:n]...)
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if err != nil {
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if err != io.EOF {
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t.Fatal(err)
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}
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break
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}
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if seek {
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// Shifting by incomplete bytes should not affect the result.
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for i := 0; i < 4; i++ {
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if _, err := r.Seek(int64(i), io.SeekCurrent); err != nil {
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if err != io.EOF {
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t.Fatal(err)
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}
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break
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}
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}
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}
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}
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want := out
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if !bytes.Equal(got, want) {
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t.Errorf("got: %v, want: %v", got, want)
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}
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})
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}
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})
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}
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}
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