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/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
// jmac.cpp
//
#include <jni.h>
#include <All.h>
#include "jmac.h"
#include "APEDecompressJMAC.h"
#define MAX_DECODERS 1024
CAPEDecompressJMAC* decoders[MAX_DECODERS];
typedef struct MAC_ERROR {
int nErrorCode;
char* spErrorExplanation;
} MAC_ERROR;
#define NUM_MAC_ERRORS 23
MAC_ERROR MAC_ERRORS[NUM_MAC_ERRORS] = {
ERROR_EXPLANATION
};
void ThrowError(JNIEnv* env, int nErrorCode) {
char* errorMessage = "Error Undefined";
for (int i = 0; i < NUM_MAC_ERRORS; i++) {
if (MAC_ERRORS[i].nErrorCode == nErrorCode) {
errorMessage = MAC_ERRORS[i].spErrorExplanation;
break;
}
}
jclass clazz = env->FindClass("davaguine/jmac/tools/JMACException");
if (clazz == NULL) {
if (env->ExceptionOccurred()) {
env->ExceptionDescribe();
env->ExceptionClear();
}
} else
env->ThrowNew(clazz, errorMessage);
env->DeleteLocalRef(clazz);
}
JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
memset(decoders, 0, sizeof(decoders));
return JNI_VERSION_1_4;
}
JNIEXPORT void JNICALL JNI_OnUnload(JavaVM* vm, void* reserved) {
for (jint i = 0; i < MAX_DECODERS; i++) {
if (decoders[i]) {
delete decoders[i];
decoders[i] = NULL;
}
}
}
JNIEXPORT jint JNICALL Java_davaguine_jmac_decoder_APEDecompressNative_registerDecoder(JNIEnv* env, jobject athisObject, jobject aioObject,
jint nVersion, jint nCompressionLevel,
jint nStartBlock, jint nFinishBlock,
jint nTotalBlocks, jint nBlockAlign,
jint nBlocksPerFrame, jint nSampleRate,
jint nBitsPerSample, jint nChannels) {
for (jint i = 0; i < MAX_DECODERS; i++) {
if (!decoders[i]) {
decoders[i] = new CAPEDecompressJMAC(env, athisObject, aioObject, nVersion, nCompressionLevel, nStartBlock, nFinishBlock,
nTotalBlocks, nBlockAlign, nBlocksPerFrame, nSampleRate, nBitsPerSample, nChannels);
return i;
}
}
return -1;
}
JNIEXPORT jint JNICALL Java_davaguine_jmac_decoder_APEDecompressNative_GetData(JNIEnv* env, jobject athisObject, jint ID, jobject aioObject,
jbyteArray pBuffer, jint nBlocks) {
if (decoders[ID] != NULL) {
decoders[ID]->SetRefs(env, athisObject, aioObject);
jbyte* elements = env->GetByteArrayElements(pBuffer, NULL);
if (elements != NULL) {
int nBlocksRetrieved;
int retValue = decoders[ID]->GetData((char*) elements, nBlocks, &nBlocksRetrieved);
env->ReleaseByteArrayElements(pBuffer, elements, 0);
if (retValue != ERROR_SUCCESS)
ThrowError(env, retValue);
return nBlocksRetrieved;
}
}
ThrowError(env, ERROR_UNDEFINED);
return -1;
};
JNIEXPORT void JNICALL Java_davaguine_jmac_decoder_APEDecompressNative_Seek(JNIEnv* env, jobject athisObject, jint ID, jobject aioObject,
jint nBlockOffset) {
if (decoders[ID] != NULL) {
decoders[ID]->SetRefs(env, athisObject, aioObject);
int retValue = decoders[ID]->Seek(nBlockOffset);
if (retValue != ERROR_SUCCESS)
ThrowError(env, retValue);
return;
}
ThrowError(env, ERROR_UNDEFINED);
};
JNIEXPORT void JNICALL Java_davaguine_jmac_decoder_APEDecompressNative_finalize(JNIEnv* env, jobject athisObject, jint ID, jobject aioObject) {
if (decoders[ID] != NULL) {
decoders[ID]->SetRefs(env, athisObject, aioObject);
delete decoders[ID];
decoders[ID] = NULL;
return;
}
ThrowError(env, ERROR_UNDEFINED);
};
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