智能手机安卓版c语言发出声音程序代码?

以下是一个简单的安卓C语言程序，可以发出声音：

#include <jni.h>
#include <android/log.h>
#include <SLES/OpenSLES.h>
#include <SLES/OpenSLES_Android.h>

#define BUFFER_SIZE 44100

SLObjectItf engineObject = NULL;
SLEngineItf engineEngine;
SLObjectItf outputMixObject = NULL;
SLEnvironmentalReverbItf outputMixEnvironmentalReverb = NULL;
SLEnvironmentalReverbSettings reverbSettings = SL_I3DL2_ENVIRONMENT_PRESET_STONECORRIDOR;
SLObjectItf playerObject = NULL;
SLPlayItf playerPlay;
SLAndroidSimpleBufferQueueItf playerBufferQueue;

void playAudioBuffer(SLAndroidSimpleBufferQueueItf bufferQueue, void *context) {
    static short audioBuffer[BUFFER_SIZE];

    for (int i = 0; i < BUFFER_SIZE; i++) {
        audioBuffer[i] = 10000 * ((float)rand() / RAND_MAX) - 5000;
    }

    (*bufferQueue)->Enqueue(bufferQueue, audioBuffer, BUFFER_SIZE*sizeof(short));
}

void Java_com_example_myapp_MainActivity_startAudio(JNIEnv* env, jobject thiz) {
    SLresult result;

    // create engine
    result = slCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);
    result = (*engineObject)->Realize(engineObject, SL_BOOLEAN_FALSE);
    result = (*engineObject)->GetInterface(engineObject, SL_IID_ENGINE, &engineEngine);

    // create output mix
    result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 0, NULL, NULL);
    result = (*outputMixObject)->Realize(outputMixObject, SL_BOOLEAN_FALSE);
    result = (*outputMixObject)->GetInterface(outputMixObject, SL_IID_ENVIRONMENTALREVERB, &outputMixEnvironmentalReverb);
    result = (*outputMixEnvironmentalReverb)->SetEnvironmentalReverbProperties(outputMixEnvironmentalReverb, &reverbSettings);

    // create audio player
    SLDataLocator_AndroidSimpleBufferQueue bufferQueueLocator = { SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 2 };
    SLDataFormat_PCM pcmFormat = { SL_DATAFORMAT_PCM, 1, SL_SAMPLINGRATE_44_1, SL_PCMSAMPLEFORMAT_FIXED_16, SL_PCMSAMPLEFORMAT_FIXED_16, SL_SPEAKER_FRONT_CENTER, SL_BYTEORDER_LITTLEENDIAN };
    SLDataSource audioPlayerSource = { &bufferQueueLocator, &pcmFormat };
    SLDataLocator_OutputMix audioPlayerLocator = { SL_DATALOCATOR_OUTPUTMIX, outputMixObject };
    SLDataSink audioPlayerSink = { &audioPlayerLocator, NULL };
    const SLInterfaceID audioPlayerInterfaces[1] = { SL_IID_BUFFERQUEUE };
    const SLboolean audioPlayerInterfaceRequired[1] = { SL_BOOLEAN_TRUE };
    result = (*engineEngine)->CreateAudioPlayer(engineEngine, &playerObject, &audioPlayerSource, &audioPlayerSink, 1, audioPlayerInterfaces, audioPlayerInterfaceRequired);
    result = (*playerObject)->Realize(playerObject, SL_BOOLEAN_FALSE);
    result = (*playerObject)->GetInterface(playerObject, SL_IID_PLAY, &playerPlay);
    result = (*playerObject)->GetInterface(playerObject, SL_IID_ANDROIDBUFFERQUEUESOURCE, &playerBufferQueue);
    result = (*playerBufferQueue)->RegisterCallback(playerBufferQueue, playAudioBuffer, NULL);
    result = (*playerPlay)->SetPlayState(playerPlay, SL_PLAYSTATE_PLAYING);
    (*playAudioBuffer)(playerBufferQueue, NULL);
}

void Java_com_example_myapp_MainActivity_stopAudio(JNIEnv* env, jobject thiz) {
    if (playerObject != NULL) {
        (*playerObject)->Destroy(playerObject);
        playerObject = NULL;
        playerPlay = NULL;
        playerBufferQueue = NULL;
    }

    if (outputMixObject != NULL) {
        (*outputMixObject)->Destroy(outputMixObject);
        outputMixObject = NULL;
        outputMixEnvironmentalReverb = NULL;
    }

    if (engineObject != NULL) {
        (*engineObject)->Destroy(engineObject);
        engineObject = NULL;
        engineEngine = NULL;
    }
}

注：此程序使用 OpenSL ES 接口，需要在安卓 NDK 中使用 NDK 模块编译，不支持在标准C语言中编译。