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00011 #include "features/RealFileFeatures.h"
00012 #include "features/Features.h"
00013 #include "lib/io.h"
00014
00015 #include <stdio.h>
00016 #include <string.h>
00017
00018 CRealFileFeatures::CRealFileFeatures(int32_t size, char* fname)
00019 : CRealFeatures(size)
00020 {
00021 working_file=fopen(fname, "r");
00022 working_filename=strdup(fname);
00023 ASSERT(working_file);
00024 intlen=0;
00025 doublelen=0;
00026 endian=0;
00027 fourcc=0;
00028 preprocd=0;
00029 labels=NULL;
00030 status=load_base_data();
00031 }
00032
00033 CRealFileFeatures::CRealFileFeatures(int32_t size, FILE* file)
00034 : CRealFeatures(size), working_file(file), working_filename(NULL)
00035 {
00036 ASSERT(working_file);
00037 intlen=0;
00038 doublelen=0;
00039 endian=0;
00040 fourcc=0;
00041 preprocd=0;
00042 labels=NULL;
00043 status=load_base_data();
00044 }
00045
00046 CRealFileFeatures::~CRealFileFeatures()
00047 {
00048 delete[] feature_matrix;
00049 delete[] working_filename;
00050 delete[] labels;
00051 }
00052
00053 CRealFileFeatures::CRealFileFeatures(const CRealFileFeatures & orig)
00054 : CRealFeatures(orig), working_file(orig.working_file), status(orig.status)
00055 {
00056 if (orig.working_filename)
00057 working_filename=strdup(orig.working_filename);
00058 if (orig.labels && get_num_vectors())
00059 {
00060 labels=new int32_t[get_num_vectors()];
00061 memcpy(labels, orig.labels, sizeof(int32_t)*get_num_vectors());
00062 }
00063 }
00064
00065 float64_t* CRealFileFeatures::compute_feature_vector(
00066 int32_t num, int32_t &len, float64_t* target)
00067 {
00068 ASSERT(num<num_vectors);
00069 len=num_features;
00070 float64_t* featurevector=target;
00071 if (!featurevector)
00072 featurevector=new float64_t[num_features];
00073 ASSERT(working_file);
00074 fseek(working_file, filepos+num_features*doublelen*num, SEEK_SET);
00075 ASSERT(fread(featurevector, doublelen, num_features, working_file)==(size_t) num_features);
00076 return featurevector;
00077 }
00078
00079 float64_t* CRealFileFeatures::load_feature_matrix()
00080 {
00081 ASSERT(working_file);
00082 fseek(working_file, filepos, SEEK_SET);
00083 delete[] feature_matrix;
00084
00085 SG_INFO( "allocating feature matrix of size %.2fM\n", sizeof(double)*num_features*num_vectors/1024.0/1024.0);
00086 free_feature_matrix();
00087 feature_matrix=new float64_t[num_features*num_vectors];
00088
00089 SG_INFO( "loading... be patient.\n");
00090
00091 for (int32_t i=0; i<(int32_t) num_vectors; i++)
00092 {
00093 if (!(i % (num_vectors/10+1)))
00094 SG_PRINT( "%02d%%.", (int) (100.0*i/num_vectors));
00095 else if (!(i % (num_vectors/200+1)))
00096 SG_PRINT( ".");
00097
00098 ASSERT(fread(&feature_matrix[num_features*i], doublelen, num_features, working_file)==(size_t) num_features);
00099 }
00100 SG_DONE();
00101
00102 return feature_matrix;
00103 }
00104
00105 int32_t CRealFileFeatures::get_label(int32_t idx)
00106 {
00107 ASSERT(idx<num_vectors);
00108 if (labels)
00109 return labels[idx];
00110 return 0;
00111 }
00112
00113 bool CRealFileFeatures::load_base_data()
00114 {
00115 ASSERT(working_file);
00116 uint32_t num_vec=0;
00117 uint32_t num_feat=0;
00118
00119 ASSERT(fread(&intlen, sizeof(uint8_t), 1, working_file)==1);
00120 ASSERT(fread(&doublelen, sizeof(uint8_t), 1, working_file)==1);
00121 ASSERT(fread(&endian, (uint32_t) intlen, 1, working_file)== 1);
00122 ASSERT(fread(&fourcc, (uint32_t) intlen, 1, working_file)==1);
00123 ASSERT(fread(&num_vec, (uint32_t) intlen, 1, working_file)==1);
00124 ASSERT(fread(&num_feat, (uint32_t) intlen, 1, working_file)==1);
00125 ASSERT(fread(&preprocd, (uint32_t) intlen, 1, working_file)==1);
00126 SG_INFO( "detected: intsize=%d, doublesize=%d, num_vec=%d, num_feat=%d, preprocd=%d\n", intlen, doublelen, num_vec, num_feat, preprocd);
00127 filepos=ftell(working_file);
00128 set_num_vectors(num_vec);
00129 set_num_features(num_feat);
00130 fseek(working_file, filepos+num_features*num_vectors*doublelen, SEEK_SET);
00131 delete[] labels;
00132 labels=new int[num_vec];
00133 ASSERT(fread(labels, intlen, num_vec, working_file) == num_vec);
00134 return true;
00135 }