mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
112 lines
2.0 KiB
Go
112 lines
2.0 KiB
Go
// Copyright 2019 The Ebiten 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"
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"testing"
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. "github.com/hajimehoshi/ebiten/audio/internal/convert"
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)
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type f32reader struct {
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data []float32
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pos int
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}
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func (f *f32reader) Read(buf []float32) (int, error) {
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if f.pos == len(f.data) {
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return 0, io.EOF
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}
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n := copy(buf, f.data[f.pos:])
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f.pos += n
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return n, nil
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}
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func newFloat32Reader(data []float32) Float32Reader {
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return &f32reader{data: data}
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}
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func TestFloat32Reader(t *testing.T) {
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in1 := make([]float32, 256)
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for i := range in1 {
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in1[i] = float32(math.Sin(float64(i)))
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}
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in2 := make([]float32, 65536)
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for i := range in2 {
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in2[i] = float32(math.Cos(float64(i)))
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}
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cases := []struct {
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In []float32
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N int
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}{
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{
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In: in1,
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N: 1,
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},
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{
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In: in1,
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N: 2,
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},
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{
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In: in1,
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N: 3,
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},
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{
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In: in1,
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N: 1024,
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},
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{
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In: in2,
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N: 1,
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},
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{
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In: in2,
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N: 4096,
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},
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}
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for i, c := range cases {
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r := NewReaderFromFloat32Reader(newFloat32Reader(c.In))
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got := []byte{}
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for {
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buf := make([]byte, c.N)
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n, err := r.Read(buf)
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if err != nil {
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if n == 0 && err == io.EOF {
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break
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}
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t.Fatal(err)
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}
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got = append(got, buf[:n]...)
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}
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want := make([]byte, len(c.In)*2)
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for i, f := range c.In {
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s := int16(f * (1<<15 - 1))
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want[2*i] = byte(s)
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want[2*i+1] = byte(s >> 8)
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}
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if !bytes.Equal(got, want) {
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t.Errorf("case: %d, got: %v, want: %v", i, got, want)
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}
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}
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}
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