// ----------------------------------------------------------------------------
static jint android_media_AudioRecord_readInByteArray(JNIEnv *env, jobject thiz,
jbyteArray javaAudioData,
jint offsetInBytes, jint sizeInBytes) {
jbyte* recordBuff = NULL;
AudioRecord *lpRecorder = NULL;
// get the audio recorder from which we'll read new audio samples
lpRecorder =
(AudioRecord *)env->GetIntField(thiz, javaAudioRecordFields.nativeRecorderInJavaObj);
if (lpRecorder == NULL) {
LOGE("Unable to retrieve AudioRecord object, can't record");
return 0;
}
if (!javaAudioData) {
LOGE("Invalid Java array to store recorded audio, can't record");
return 0;
}
// get the pointer to where we'll record the audio
// NOTE: We may use GetPrimitiveArrayCritical() when the JNI implementation changes in such
// a way that it becomes much more efficient. When doing so, we will have to prevent the
// AudioSystem callback to be called while in critical section (in case of media server
// process crash for instance)
recordBuff = (jbyte *)env->GetByteArrayElements(javaAudioData, NULL);
if (recordBuff == NULL) {
LOGE("Error retrieving destination for recorded audio data, can't record");
return 0;
}
// read the new audio data from the native AudioRecord object
ssize_t recorderBuffSize = lpRecorder->frameCount()*lpRecorder->frameSize();
ssize_t readSize = lpRecorder->read(recordBuff + offsetInBytes,
sizeInBytes > (jint)recorderBuffSize ?
(jint)recorderBuffSize : sizeInBytes );
env->ReleaseByteArrayElements(javaAudioData, recordBuff, 0);
return (jint) readSize;
}
// ----------------------------------------------------------------------------
static jint android_media_AudioRecord_readInByteArray(JNIEnv *env, jobject thiz,
jbyteArray javaAudioData,
jint offsetInBytes, jint sizeInBytes) {
jbyte* recordBuff = NULL;
AudioRecord *lpRecorder = NULL;
// get the audio recorder from which we'll read new audio samples
lpRecorder =
(AudioRecord *)env->GetIntField(thiz, javaAudioRecordFields.nativeRecorderInJavaObj);
if (lpRecorder == NULL) {
LOGE("Unable to retrieve AudioRecord object, can't record");
return 0;
}
if (!javaAudioData) {
LOGE("Invalid Java array to store recorded audio, can't record");
return 0;
}
// get the pointer to where we'll record the audio
recordBuff = (jbyte *)env->GetPrimitiveArrayCritical(javaAudioData, NULL);
if (recordBuff == NULL) {
LOGE("Error retrieving destination for recorded audio data, can't record");
return 0;
}
// read the new audio data from the native AudioRecord object
ssize_t recorderBuffSize = lpRecorder->frameCount()*lpRecorder->frameSize();
ssize_t readSize = lpRecorder->read(recordBuff + offsetInBytes,
sizeInBytes > (jint)recorderBuffSize ?
(jint)recorderBuffSize : sizeInBytes );
env->ReleasePrimitiveArrayCritical(javaAudioData, recordBuff, 0);
return (jint) readSize;
}