Java 安卓OpenSL“；pAudioSrc:不允许使用数据格式2拒绝SL_数据格式_PCM？

我正在尝试创建一个带有bufferqueue源和outputmix接收器的

AudioPlayer

。我已经使用与ndk示例中所示非常相似的pcm格式配置了源代码，但OpenSL拒绝使用

SL\u DATAFORMAT\u pcm

（“数据格式2”）。这对我来说毫无意义

以下是错误（在三星Galaxy S2上）：

以下是相关代码：

SLuint32 channels = 2;
SLuint32 speakers = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
SLuint32 sr = SL_SAMPLINGRATE_48;

//...
SLDataFormat_PCM format_pcm = {
    SL_DATAFORMAT_PCM,
    channels,
    sr,
    SL_PCMSAMPLEFORMAT_FIXED_16,
    SL_PCMSAMPLEFORMAT_FIXED_16,
    speakers,
    SL_BYTEORDER_LITTLEENDIAN
};

// Configure audio player source
SLDataLocator_AndroidBufferQueue loc_bufq =
    {SL_DATALOCATOR_ANDROIDBUFFERQUEUE, 2};
SLDataSource audioSrc = {&loc_bufq, &format_pcm};

// configure audio player sink
SLDataLocator_OutputMix loc_outmix =
    {SL_DATALOCATOR_OUTPUTMIX, outputMixObject};
SLDataSink audioSnk = {&loc_outmix, NULL};

// create audio player
const SLInterfaceID iidsOutPlayer[] = {SL_IID_ANDROIDBUFFERQUEUESOURCE};
const SLboolean reqsOutPlayer[] = {SL_BOOLEAN_TRUE};
result = (*engineItf)->CreateAudioPlayer(
                        engineItf,
                        &(outPlayerObject),
                        &audioSrc, &audioSnk,
                        1, iidsOutPlayer,reqsOutPlayer);

---

有人知道这是什么原因吗？谢谢

可能是您的设备不支持音频采样率。请尝试

SL\u采样光栅8

不要选择SL_采样，而是选择其他设备（Nexus 4/HTC One）进行测试

如果您在语音通信时听到失真的声音，请增加记录器缓冲区大小，您也可以尝试更改采样率。其他采样率选项有：

SL\u采样率16

，

SL\u采样率32

，

SL\u采样率44\u 1

等

---

每个android设备都有一个特定/首选的缓冲区大小和采样率。您可以从下面的java代码段中获得首选的缓冲区大小和采样率。请注意，audioManager.getProperty（）不适用于API级别结果是我需要使用

SLDataLocator\u AndroidSimpleBufferQueue

而不是

SLDataLocator\u AndroidBufferQueue

SLuint32 channels = 2;
SLuint32 speakers = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
SLuint32 sr = SL_SAMPLINGRATE_48;

//...
SLDataFormat_PCM format_pcm = {
    SL_DATAFORMAT_PCM,
    channels,
    sr,
    SL_PCMSAMPLEFORMAT_FIXED_16,
    SL_PCMSAMPLEFORMAT_FIXED_16,
    speakers,
    SL_BYTEORDER_LITTLEENDIAN
};

// Configure audio player source
SLDataLocator_AndroidBufferQueue loc_bufq =
    {SL_DATALOCATOR_ANDROIDBUFFERQUEUE, 2};
SLDataSource audioSrc = {&loc_bufq, &format_pcm};

// configure audio player sink
SLDataLocator_OutputMix loc_outmix =
    {SL_DATALOCATOR_OUTPUTMIX, outputMixObject};
SLDataSink audioSnk = {&loc_outmix, NULL};

// create audio player
const SLInterfaceID iidsOutPlayer[] = {SL_IID_ANDROIDBUFFERQUEUESOURCE};
const SLboolean reqsOutPlayer[] = {SL_BOOLEAN_TRUE};
result = (*engineItf)->CreateAudioPlayer(
                        engineItf,
                        &(outPlayerObject),
                        &audioSrc, &audioSnk,
                        1, iidsOutPlayer,reqsOutPlayer);

AudioManager audioManager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
String rate = audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
String size = audioManager.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER);
Log.d("Buffer Size and sample rate", "Size :" + size + " & Rate: " + rate);