int getc_ppi_wsq(int *oppi, unsigned char *idata, const int ilen) { int ret; int ppi; char *value; NISTCOM *nistcom; /* Get ppi from NISTCOM, if one exists ... */ if((ret = getc_nistcom_wsq(&nistcom, idata, ilen))) return(ret); if(nistcom != (NISTCOM *)NULL){ if((ret = extractfet_ret(&value, NCM_PPI, nistcom))){ freefet(nistcom); return(ret); } if(value != (char *)NULL){ ppi = atoi(value); free(value); } /* Otherwise, PPI not in NISTCOM, so ppi = -1. */ else ppi = -1; freefet(nistcom); } /* Otherwise, NISTCOM does NOT exist, so ppi = -1. */ else ppi = -1; *oppi = ppi; return(0); }
int main( int argc, char **argv) { int ret; int rawflag; /* raw input data or Ihead image */ char *outext; /* ouput file extension */ char *ifile, ofile[MAXPATHLEN]; /* file names */ int ilen; int width, height; /* image parameters */ int depth, ppi; unsigned char *idata, *odata; /* image pointers */ int lossyflag; /* data loss flag */ NISTCOM *nistcom; /* NIST Comment */ char *ppi_str; procargs(argc, argv, &outext, &ifile, &rawflag); ret = read_raw_from_filesize(ifile, &idata, &ilen); if(ret) exit(ret); ret = wsq_decode_mem(&odata, &width, &height, &depth, &ppi, &lossyflag, idata, ilen); if(ret){ free(idata); exit(ret); } if(debug > 1) fprintf(stderr, "Image pixmap constructed\n"); fileroot(ifile); sprintf(ofile, "%s.%s", ifile, NCM_EXT); /* Get NISTCOM from compressed data file */ ret = getc_nistcom_wsq(&nistcom, idata, ilen); if(ret){ free(idata); exit(ret); } free(idata); /* WSQ decoder always returns ppi=-1, so believe PPI in NISTCOM, */ /* if it already exists. */ ppi_str = (char *)NULL; if(nistcom != (NISTCOM *)NULL){ ret = extractfet_ret(&ppi_str, NCM_PPI, nistcom); if(ret){ free(odata); freefet(nistcom); exit(ret); } } if(ppi_str != (char *)NULL){ ppi = atoi(ppi_str); free(ppi_str); } /* Combine NISTCOM with image features */ ret = combine_wsq_nistcom(&nistcom, width, height, depth, ppi, lossyflag, 0.0 /* will be deleted next */); if(ret){ free(odata); if(nistcom != (NISTCOM *)NULL) freefet(nistcom); exit(ret); } ret = del_wsq_nistcom(nistcom); if(ret){ free(odata); freefet(nistcom); exit(ret); } /* Write NISTCOM */ ret = writefetfile_ret(ofile, nistcom); if(ret){ free(odata); freefet(nistcom); exit(ret); } freefet(nistcom); /* Write decoded image file. */ sprintf(ofile, "%s.%s", ifile, outext); ret = write_raw_or_ihead(!rawflag, ofile, odata, width, height, depth, ppi); if(ret){ free(odata); exit(ret); } free(odata); if(debug > 1) fprintf(stdout, "Image pixmap written to %s\n", ofile); exit(0); }
/** * Decodes an encoded WSQ byte array to a buffered image. * Based on dwsq.c. * * @param in a byte array holding the encoded WSQ image * * @return a buffered image */ JNIEXPORT jobject JNICALL Java_org_jmrtd_imageio_WSQImageReader_decodeWSQ (JNIEnv *env, jobject obj, jbyteArray in, jobject metadata) { /* Java classes and objects */ jclass ioexceptionClazz = (*env)->FindClass(env, "java/io/IOException"); jclass metadataClazz = (*env)->GetObjectClass(env, metadata); jclass imgClazz = (*env)->FindClass(env, "java/awt/image/BufferedImage"); jclass writableRasterClazz = (*env)->FindClass(env, "java/awt/image/WritableRaster"); jmethodID metadataSetPropertyMethodID = (*env)->GetMethodID(env, metadataClazz, "setProperty", "(Ljava/lang/String;Ljava/lang/String;)Z"); jmethodID imgInitMethodID = (*env)->GetMethodID(env, imgClazz, "<init>", "(III)V"); jmethodID imgGetRasterMethodID = (*env)->GetMethodID(env, imgClazz, "getRaster", "()Ljava/awt/image/WritableRaster;"); jmethodID rasterSetDataElementsMethodID = (*env)->GetMethodID(env, writableRasterClazz, "setDataElements", "(IIIILjava/lang/Object;)V"); jfieldID imgTypeByteGrayFieldID = (*env)->GetStaticFieldID(env, imgClazz, "TYPE_BYTE_GRAY", "I"); jint TYPE_BYTE_GRAY = (*env)->GetStaticIntField(env, imgClazz, imgTypeByteGrayFieldID); jobject imgObject, rasterObject; /* WSQ-Compressed input buffer */ unsigned char *idata = (unsigned char*)(*env)->GetByteArrayElements(env, in, JNI_FALSE); int idata_len = (*env)->GetArrayLength(env, in); /* Uncompressed Pixel Buffer */ unsigned char *odata = NULL; jbyteArray jodata = NULL; /* Image parameters */ NISTCOM *nistcom = NULL; int width, height, depth, ppi, lossy; int wsq_decore_ret, nistcom_ret; /* Parse WSQ Image */ wsq_decore_ret = wsq_decode_mem(&odata, &width, &height, &depth, &ppi, &lossy, idata, idata_len); if (wsq_decore_ret==0) { jodata = (*env)->NewByteArray(env, width*height); (*env)->SetByteArrayRegion(env, jodata, 0, width*height, (jbyte*)odata); free(odata); odata = NULL; } else { (*env)->ReleaseByteArrayElements(env, in, (jbyte*)idata, JNI_FALSE); (*env)->ThrowNew(env, ioexceptionClazz, "(In native C code) function wsq_decode_mem failed"); return NULL; } /* WSQ Metadata */ nistcom_ret = getc_nistcom_wsq(&nistcom, idata, idata_len); if (nistcom_ret==0 && nistcom != NULL) { int i; for (i=0; i<nistcom->num; i++) { if (nistcom->names[i]) { (*env)->CallBooleanMethod( env, metadata, metadataSetPropertyMethodID, (*env)->NewStringUTF(env, nistcom->names[i]), nistcom->values[i] ? (*env)->NewStringUTF(env, nistcom->values[i]) : NULL ); } } freefet(nistcom); } (*env)->ReleaseByteArrayElements(env, in, (jbyte*)idata, JNI_FALSE); /* Construct a BufferedImage from the byte array: BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY); WritableRaster raster = img.getRaster(); raster.setDataElements(0, 0, width, height, decodedBytes); */ imgObject = (*env)->NewObject(env, imgClazz, imgInitMethodID, width, height, TYPE_BYTE_GRAY); rasterObject = (*env)->CallObjectMethod(env, imgObject, imgGetRasterMethodID); (*env)->CallVoidMethod(env, rasterObject, rasterSetDataElementsMethodID, 0, 0, width, height, jodata); return imgObject; }