Line data Source code
1 : /*
2 : * $Id$
3 : * keadataset.h
4 : *
5 : * Created by Pete Bunting on 01/08/2012.
6 : * Copyright 2012 LibKEA. All rights reserved.
7 : *
8 : * This file is part of LibKEA.
9 : *
10 : * Permission is hereby granted, free of charge, to any person
11 : * obtaining a copy of this software and associated documentation
12 : * files (the "Software"), to deal in the Software without restriction,
13 : * including without limitation the rights to use, copy, modify,
14 : * merge, publish, distribute, sublicense, and/or sell copies of the
15 : * Software, and to permit persons to whom the Software is furnished
16 : * to do so, subject to the following conditions:
17 : *
18 : * The above copyright notice and this permission notice shall be
19 : * included in all copies or substantial portions of the Software.
20 : *
21 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 : * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23 : * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24 : * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
25 : * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
26 : * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 : * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 : *
29 : */
30 :
31 : #ifndef KEADATASET_H
32 : #define KEADATASET_H
33 :
34 : #include "gdal_pam.h"
35 : #include "cpl_multiproc.h"
36 : #include "libkea_headers.h"
37 :
38 : class LockedRefCount;
39 :
40 : // class that implements a GDAL dataset
41 : class KEADataset final : public GDALPamDataset
42 : {
43 : static H5::H5File *CreateLL(const char *pszFilename, int nXSize, int nYSize,
44 : int nBands, GDALDataType eType,
45 : char **papszParamList);
46 :
47 : public:
48 : // constructor/destructor
49 : KEADataset(H5::H5File *keaImgH5File, GDALAccess eAccess);
50 : ~KEADataset();
51 :
52 : // static methods that handle open and creation
53 : // the driver class has pointers to these
54 : static GDALDataset *Open(GDALOpenInfo *);
55 : static int Identify(GDALOpenInfo *poOpenInfo);
56 : static GDALDataset *Create(const char *pszFilename, int nXSize, int nYSize,
57 : int nBands, GDALDataType eType,
58 : char **papszParamList);
59 : static GDALDataset *CreateCopy(const char *pszFilename, GDALDataset *pSrcDs,
60 : int bStrict, char **papszParamList,
61 : GDALProgressFunc pfnProgress,
62 : void *pProgressData);
63 :
64 : // virtual methods for dealing with transform and projection
65 : CPLErr GetGeoTransform(double *padfTransform) override;
66 : const OGRSpatialReference *GetSpatialRef() const override;
67 :
68 : CPLErr SetGeoTransform(double *padfTransform) override;
69 : CPLErr SetSpatialRef(const OGRSpatialReference *poSRS) override;
70 :
71 : // method to get a pointer to the imageio class
72 : void *GetInternalHandle(const char *) override;
73 :
74 : // virtual methods for dealing with metadata
75 : CPLErr SetMetadataItem(const char *pszName, const char *pszValue,
76 : const char *pszDomain = "") override;
77 : const char *GetMetadataItem(const char *pszName,
78 : const char *pszDomain = "") override;
79 :
80 : char **GetMetadata(const char *pszDomain = "") override;
81 : CPLErr SetMetadata(char **papszMetadata,
82 : const char *pszDomain = "") override;
83 :
84 : // virtual method for adding new image bands
85 : CPLErr AddBand(GDALDataType eType, char **papszOptions = nullptr) override;
86 :
87 : // GCPs
88 : int GetGCPCount() override;
89 : const OGRSpatialReference *GetGCPSpatialRef() const override;
90 : const GDAL_GCP *GetGCPs() override;
91 : CPLErr SetGCPs(int nGCPCount, const GDAL_GCP *pasGCPList,
92 : const OGRSpatialReference *poSRS) override;
93 :
94 : protected:
95 : // this method builds overviews for the specified bands.
96 : virtual CPLErr IBuildOverviews(const char *pszResampling, int nOverviews,
97 : const int *panOverviewList, int nListBands,
98 : const int *panBandList,
99 : GDALProgressFunc pfnProgress,
100 : void *pProgressData,
101 : CSLConstList papszOptions) override;
102 :
103 : // internal method to update m_papszMetadataList
104 : void UpdateMetadataList();
105 :
106 : void DestroyGCPs();
107 :
108 : private:
109 : // pointer to KEAImageIO class and the refcount for it
110 : kealib::KEAImageIO *m_pImageIO;
111 : LockedRefCount *m_pRefcount;
112 : char **m_papszMetadataList; // CSLStringList for metadata
113 : GDAL_GCP *m_pGCPs;
114 : mutable OGRSpatialReference m_oGCPSRS{};
115 : mutable CPLMutex *m_hMutex;
116 : mutable OGRSpatialReference m_oSRS{};
117 : };
118 :
119 : // conversion functions
120 : GDALDataType KEA_to_GDAL_Type(kealib::KEADataType ekeaType);
121 : kealib::KEADataType GDAL_to_KEA_Type(GDALDataType egdalType);
122 :
123 : // For unloading the VFL
124 : void KEADatasetDriverUnload(GDALDriver *);
125 :
126 : // A thresafe reference count. Used to manage shared pointer to
127 : // the kealib::KEAImageIO instance between bands and dataset.
128 : class LockedRefCount
129 : {
130 : private:
131 : int m_nRefCount;
132 : CPLMutex *m_hMutex;
133 :
134 : CPL_DISALLOW_COPY_ASSIGN(LockedRefCount)
135 :
136 : public:
137 252 : explicit LockedRefCount(int initCount = 1)
138 252 : {
139 252 : m_nRefCount = initCount;
140 252 : m_hMutex = CPLCreateMutex();
141 252 : CPLReleaseMutex(m_hMutex);
142 252 : }
143 :
144 252 : ~LockedRefCount()
145 252 : {
146 252 : CPLDestroyMutex(m_hMutex);
147 252 : m_hMutex = nullptr;
148 252 : }
149 :
150 355 : void IncRef()
151 : {
152 355 : CPLMutexHolderD(&m_hMutex);
153 355 : m_nRefCount++;
154 355 : }
155 :
156 : // returns true if reference count now 0
157 607 : bool DecRef()
158 : {
159 607 : CPLMutexHolderD(&m_hMutex);
160 607 : m_nRefCount--;
161 1214 : return m_nRefCount <= 0;
162 : }
163 : };
164 :
165 : #endif // KEADATASET_H
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