mapleafgo
4ddecb7c30
问题: - TTS 返回 16000 Hz 音频，但 Context 使用 44100 Hz - 播放速度快 2.75 倍（44100/16000） - 不同采样率的音频播放速度不正确 解决方案: - 集成 gomplerate 库（纯 Go，零依赖） - 自动检测音频采样率并重采样到 44100 Hz - 支持任意采样率的音频文件正常播放 技术实现: - resampler.go: 封装 gomplerate，实现流式重采样 - play.go: WAV/MP3 播放自动重采样 - loop.go: BGM 循环播放支持重采样 测试: - 所有单元测试通过（6/6） - 支持采样率自动转换（如 16000 Hz → 44100 Hz） 依赖: - github.com/zeozeozeo/gomplerate v0.0.0
80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
package audio
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import (
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"bytes"
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"io"
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"sync"
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"sync/atomic"
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"time"
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"github.com/ebitengine/oto/v3"
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"github.com/hajimehoshi/go-mp3"
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)
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// PlayMP3Loop 循环播放 MP3(非阻塞)
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// 返回 player 和清理函数,调用者负责 defer cleanup()
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func PlayMP3Loop(r io.ReadCloser) (*oto.Player, func() error, error) {
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otoCtx, err := initContext()
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if err != nil {
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r.Close()
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return nil, func() error { return nil }, err
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}
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// Read the entire MP3 into memory for seeking support
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data, err := io.ReadAll(r)
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if err != nil {
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r.Close()
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return nil, func() error { return nil }, err
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}
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r.Close()
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dec, err := mp3.NewDecoder(bytes.NewReader(data))
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if err != nil {
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return nil, func() error { return nil }, err
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}
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// 获取采样率信息
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sampleRate := int(dec.SampleRate())
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targetRate := UniversalSampleRate
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// 需要重采样
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var reader io.Reader = dec
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if needsResample(sampleRate, targetRate) {
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resampleReader, err := newResamplingReader(dec, sampleRate, targetRate, 2)
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if err != nil {
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return nil, func() error { return nil }, err
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}
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reader = resampleReader
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}
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player := otoCtx.NewPlayer(reader)
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playing := atomic.Bool{}
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playing.Store(true)
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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for playing.Load() {
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player.Play()
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for playing.Load() && player.IsPlaying() {
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time.Sleep(10 * time.Millisecond)
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}
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if playing.Load() {
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// 重置解码器位置
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_, _ = dec.Seek(0, io.SeekStart)
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}
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}
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}()
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cleanup := func() error {
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playing.Store(false)
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wg.Wait()
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player.Close()
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return nil
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}
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return player, cleanup, nil
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}
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