LoopbackApp/app/src/main/jni/jni_sles.c

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <android/log.h>
#include "sles.h"
#include "jni_sles.h"
#include <stdio.h>


JNIEXPORT jlong JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesInit
  (JNIEnv *env, jobject obj __unused, jint samplingRate, jint frameCount, jint micSource,
   jint performanceMode,
   jint testType, jdouble frequency1, jobject byteBuffer, jshortArray loopbackTone,
   jint maxRecordedLateCallbacks, jint ignoreFirstFrames) {

    sles_data * pSles = NULL;

    char* byteBufferPtr = (*env)->GetDirectBufferAddress(env, byteBuffer);
    int byteBufferLength = (*env)->GetDirectBufferCapacity(env, byteBuffer);

    short* loopbackToneArray = (*env)->GetShortArrayElements(env, loopbackTone, 0);

    if (slesInit(&pSles, samplingRate, frameCount, micSource,
                 performanceMode,
                 testType, frequency1, byteBufferPtr, byteBufferLength,
                 loopbackToneArray, maxRecordedLateCallbacks, ignoreFirstFrames) != SLES_FAIL) {
        return (long) pSles;
    }

    // FIXME This should be stored as a (long) field in the object,
    // so that incorrect Java code could not synthesize a bad sles pointer.
    return 0;
}


JNIEXPORT jint JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesProcessNext
(JNIEnv *env __unused, jobject obj __unused, jlong sles, jdoubleArray samplesArray, jlong offset) {
    sles_data * pSles = (sles_data*) (size_t) sles;

    long maxSamples = (*env)->GetArrayLength(env, samplesArray);
    double *pSamples = (*env)->GetDoubleArrayElements(env, samplesArray, 0);

    long availableSamples = maxSamples-offset;
    double *pCurrentSample = pSamples+offset;

    SLES_PRINTF("jni slesProcessNext pSles:%p, currentSample %p, availableSamples %ld ",
                pSles, pCurrentSample, availableSamples);

    int samplesRead = slesProcessNext(pSles, pCurrentSample, availableSamples);
    return samplesRead;
}


JNIEXPORT jint JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesDestroy
  (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    int status = slesDestroy(&pSles);
    return status;
}


JNIEXPORT jintArray JNICALL
        Java_org_drrickorang_loopback_NativeAudioThread_slesGetRecorderBufferPeriod
  (JNIEnv *env, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    int* recorderBufferPeriod = slesGetRecorderBufferPeriod(pSles);

    // get the length = RANGE
    jintArray result = (*env)->NewIntArray(env, RANGE);
    (*env)->SetIntArrayRegion(env, result, 0, RANGE, recorderBufferPeriod);

    return result;
}


JNIEXPORT jint JNICALL
        Java_org_drrickorang_loopback_NativeAudioThread_slesGetRecorderMaxBufferPeriod
  (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    int recorderMaxBufferPeriod = slesGetRecorderMaxBufferPeriod(pSles);

    return recorderMaxBufferPeriod;
}


JNIEXPORT jdouble JNICALL
        Java_org_drrickorang_loopback_NativeAudioThread_slesGetRecorderVarianceBufferPeriod
        (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data *pSles = (sles_data *) (size_t) sles;
    int64_t result = slesGetRecorderVarianceBufferPeriod(pSles);
    // variance has units ns^2 so we have to square the conversion factor
    double scaled = (double) result / ((double) NANOS_PER_MILLI * (double) NANOS_PER_MILLI);
    return scaled;
}


JNIEXPORT jintArray
JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesGetPlayerBufferPeriod
  (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    int* playerBufferPeriod = slesGetPlayerBufferPeriod(pSles);

    jintArray result = (*env)->NewIntArray(env, RANGE);
    (*env)->SetIntArrayRegion(env, result, 0, RANGE, playerBufferPeriod);

    return result;
}


JNIEXPORT jint JNICALL
        Java_org_drrickorang_loopback_NativeAudioThread_slesGetPlayerMaxBufferPeriod
  (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    int playerMaxBufferPeriod = slesGetPlayerMaxBufferPeriod(pSles);

    return playerMaxBufferPeriod;
}


JNIEXPORT jdouble JNICALL
Java_org_drrickorang_loopback_NativeAudioThread_slesGetPlayerVarianceBufferPeriod
        (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data *pSles = (sles_data *) (size_t) sles;
    int64_t result = slesGetPlayerVarianceBufferPeriod(pSles);
    // variance has units ns^2 so we have to square the conversion factor
    double scaled = (double) result / ((double) NANOS_PER_MILLI * (double) NANOS_PER_MILLI);
    return scaled;
}


jobject getCallbackTimes(JNIEnv *env, callbackTimeStamps *callbacks, short expectedBufferPeriod){
    jintArray timeStamps = (*env)->NewIntArray(env, callbacks->index);
    (*env)->SetIntArrayRegion(env, timeStamps, 0, callbacks->index, callbacks->timeStampsMs);

    jshortArray callbackLengths = (*env)->NewShortArray(env, callbacks->index);
    (*env)->SetShortArrayRegion(env, callbackLengths, 0, callbacks->index,
                                callbacks->callbackDurations);

    jclass cls = (*env)->FindClass(env, "org/drrickorang/loopback/BufferCallbackTimes");
    jmethodID methodID = (*env)->GetMethodID(env, cls, "<init>", "([I[SZS)V");
    jobject callbackTimes=(*env)->NewObject(env,cls, methodID, timeStamps, callbackLengths,
                                            callbacks->exceededCapacity, expectedBufferPeriod);
    return callbackTimes;
}

JNIEXPORT jobject
JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesGetPlayerCallbackTimeStamps
        (JNIEnv *env, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    return getCallbackTimes(env, &(pSles->playerTimeStamps), pSles->expectedBufferPeriod);
}

JNIEXPORT jobject
JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesGetRecorderCallbackTimeStamps
        (JNIEnv *env, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    return getCallbackTimes(env, &(pSles->recorderTimeStamps), pSles->expectedBufferPeriod);
}

JNIEXPORT jint
JNICALL Java_org_drrickorang_loopback_NativeAudioThread_slesGetCaptureRank
        (JNIEnv *env __unused, jobject obj __unused, jlong sles) {
    sles_data * pSles = (sles_data*) (size_t) sles;
    return slesGetCaptureRank(pSles);
}