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JPEG: implement deferred driver loading
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| /****************************************************************************** | ||
| * | ||
| * Project: JPEG JFIF Driver | ||
| * Purpose: Implement GDAL JPEG Support based on IJG libjpeg. | ||
| * Author: Frank Warmerdam, [email protected] | ||
| * | ||
| ****************************************************************************** | ||
| * Copyright (c) 2000, Frank Warmerdam | ||
| * Copyright (c) 2007-2014, Even Rouault <even dot rouault at spatialys.com> | ||
| * | ||
| * Portions Copyright (c) Her majesty the Queen in right of Canada as | ||
| * represented by the Minister of National Defence, 2006. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a | ||
| * copy of this software and associated documentation files (the "Software"), | ||
| * to deal in the Software without restriction, including without limitation | ||
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| * and/or sell copies of the Software, and to permit persons to whom the | ||
| * Software is furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included | ||
| * in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| * DEALINGS IN THE SOFTWARE. | ||
| ****************************************************************************/ | ||
|
|
||
| #include "jpegdrivercore.h" | ||
|
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| // So that D_LOSSLESS_SUPPORTED is visible if defined in jmorecfg of libjpeg-turbo >= 2.2 | ||
| #define JPEG_INTERNAL_OPTIONS | ||
| #include "jpeglib.h" | ||
|
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||
| /************************************************************************/ | ||
| /* JPEGDatasetIsJPEGLS() */ | ||
| /************************************************************************/ | ||
|
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| bool JPEGDatasetIsJPEGLS(GDALOpenInfo *poOpenInfo) | ||
|
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| { | ||
| GByte *pabyHeader = poOpenInfo->pabyHeader; | ||
| int nHeaderBytes = poOpenInfo->nHeaderBytes; | ||
|
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| if (nHeaderBytes < 10) | ||
| return false; | ||
|
|
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| if (pabyHeader[0] != 0xff || pabyHeader[1] != 0xd8) | ||
| return false; | ||
|
|
||
| for (int nOffset = 2; nOffset + 4 < nHeaderBytes;) | ||
| { | ||
| if (pabyHeader[nOffset] != 0xFF) | ||
| return false; | ||
|
|
||
| int nMarker = pabyHeader[nOffset + 1]; | ||
| if (nMarker == 0xDA) | ||
| return false; | ||
|
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| if (nMarker == 0xF7) // JPEG Extension 7, JPEG-LS. | ||
| return true; | ||
| if (nMarker == 0xF8) // JPEG Extension 8, JPEG-LS Extension. | ||
| return true; | ||
| if (nMarker == 0xC3) // Start of Frame 3 (Lossless Huffman) | ||
| return true; | ||
| if (nMarker == | ||
| 0xC7) // Start of Frame 7 (Differential Lossless Huffman) | ||
| return true; | ||
| if (nMarker == 0xCB) // Start of Frame 11 (Lossless Arithmetic) | ||
| return true; | ||
| if (nMarker == | ||
| 0xCF) // Start of Frame 15 (Differential Lossless Arithmetic) | ||
| return true; | ||
|
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| nOffset += 2 + pabyHeader[nOffset + 2] * 256 + pabyHeader[nOffset + 3]; | ||
| } | ||
|
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| return false; | ||
| } | ||
|
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| /************************************************************************/ | ||
| /* JPEGDriverIdentify() */ | ||
| /************************************************************************/ | ||
|
|
||
| int JPEGDriverIdentify(GDALOpenInfo *poOpenInfo) | ||
|
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| { | ||
| // If it is a subfile, read the JPEG header. | ||
| if (STARTS_WITH_CI(poOpenInfo->pszFilename, "JPEG_SUBFILE:")) | ||
| return TRUE; | ||
| if (STARTS_WITH(poOpenInfo->pszFilename, "JPEG:")) | ||
| return TRUE; | ||
|
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| // First we check to see if the file has the expected header bytes. | ||
| const int nHeaderBytes = poOpenInfo->nHeaderBytes; | ||
|
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| if (nHeaderBytes < 10) | ||
| return FALSE; | ||
|
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| GByte *const pabyHeader = poOpenInfo->pabyHeader; | ||
| if (pabyHeader[0] != 0xff || pabyHeader[1] != 0xd8 || pabyHeader[2] != 0xff) | ||
| return FALSE; | ||
|
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| // libjpeg-turbo >= 2.2 supports lossless mode | ||
| #if !defined(D_LOSSLESS_SUPPORTED) | ||
| if (JPEGDatasetIsJPEGLS(poOpenInfo)) | ||
| { | ||
| return FALSE; | ||
| } | ||
| #endif | ||
|
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| // Some files like | ||
| // http://dionecanali.hd.free.fr/~mdione/mapzen/N65E039.hgt.gz could be | ||
| // mis-identfied as JPEG | ||
| CPLString osFilenameLower = CPLString(poOpenInfo->pszFilename).tolower(); | ||
| if (osFilenameLower.endsWith(".hgt") || | ||
| osFilenameLower.endsWith(".hgt.gz") || | ||
| osFilenameLower.endsWith(".hgt.zip")) | ||
| { | ||
| return FALSE; | ||
| } | ||
|
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| return TRUE; | ||
| } | ||
|
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| /************************************************************************/ | ||
| /* JPEGDriverSetCommonMetadata() */ | ||
| /************************************************************************/ | ||
|
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| void JPEGDriverSetCommonMetadata(GDALDriver *poDriver) | ||
| { | ||
| poDriver->SetDescription(DRIVER_NAME); | ||
| poDriver->SetMetadataItem(GDAL_DCAP_RASTER, "YES"); | ||
| poDriver->SetMetadataItem(GDAL_DMD_LONGNAME, "JPEG JFIF"); | ||
| poDriver->SetMetadataItem(GDAL_DMD_HELPTOPIC, "drivers/raster/jpeg.html"); | ||
| poDriver->SetMetadataItem(GDAL_DMD_EXTENSION, "jpg"); | ||
| poDriver->SetMetadataItem(GDAL_DMD_EXTENSIONS, "jpg jpeg"); | ||
| poDriver->SetMetadataItem(GDAL_DMD_MIMETYPE, "image/jpeg"); | ||
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| #if defined(JPEG_LIB_MK1_OR_12BIT) || defined(JPEG_DUAL_MODE_8_12) | ||
| poDriver->SetMetadataItem(GDAL_DMD_CREATIONDATATYPES, "Byte UInt16"); | ||
| #else | ||
| poDriver->SetMetadataItem(GDAL_DMD_CREATIONDATATYPES, "Byte"); | ||
| #endif | ||
| poDriver->SetMetadataItem(GDAL_DCAP_VIRTUALIO, "YES"); | ||
|
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| const char *pszOpenOptions = | ||
| "<OpenOptionList>\n" | ||
| " <Option name='USE_INTERNAL_OVERVIEWS' type='boolean' " | ||
| "description='whether to use implicit internal overviews' " | ||
| "default='YES'/>\n" | ||
| " <Option name='APPLY_ORIENTATION' type='boolean' " | ||
| "description='whether to take into account EXIF Orientation to " | ||
| "rotate/flip the image' default='NO'/>\n" | ||
| "</OpenOptionList>\n"; | ||
| poDriver->SetMetadataItem(GDAL_DMD_OPENOPTIONLIST, pszOpenOptions); | ||
|
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| #ifdef D_LOSSLESS_SUPPORTED | ||
| // For autotest purposes | ||
| poDriver->SetMetadataItem("LOSSLESS_JPEG_SUPPORTED", "YES", "JPEG"); | ||
| #endif | ||
|
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| poDriver->pfnIdentify = JPEGDriverIdentify; | ||
| poDriver->SetMetadataItem(GDAL_DCAP_OPEN, "YES"); | ||
| poDriver->SetMetadataItem(GDAL_DCAP_CREATECOPY, "YES"); | ||
| } | ||
|
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| /************************************************************************/ | ||
| /* DeclareDeferredJPEGPlugin() */ | ||
| /************************************************************************/ | ||
|
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||
| #ifdef PLUGIN_FILENAME | ||
| void DeclareDeferredJPEGPlugin() | ||
| { | ||
| if (GDALGetDriverByName(DRIVER_NAME) != nullptr) | ||
| { | ||
| return; | ||
| } | ||
| auto poDriver = new GDALPluginDriverProxy(PLUGIN_FILENAME); | ||
| JPEGDriverSetCommonMetadata(poDriver); | ||
| GetGDALDriverManager()->DeclareDeferredPluginDriver(poDriver); | ||
| } | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| /****************************************************************************** | ||
| * | ||
| * Project: JPEG JFIF Driver | ||
| * Purpose: Implement GDAL JPEG Support based on IJG libjpeg. | ||
| * Author: Frank Warmerdam, [email protected] | ||
| * | ||
| ****************************************************************************** | ||
| * Copyright (c) 2000, Frank Warmerdam | ||
| * Copyright (c) 2007-2014, Even Rouault <even dot rouault at spatialys.com> | ||
| * | ||
| * Portions Copyright (c) Her majesty the Queen in right of Canada as | ||
| * represented by the Minister of National Defence, 2006. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a | ||
| * copy of this software and associated documentation files (the "Software"), | ||
| * to deal in the Software without restriction, including without limitation | ||
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, | ||
| * and/or sell copies of the Software, and to permit persons to whom the | ||
| * Software is furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included | ||
| * in all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | ||
| * DEALINGS IN THE SOFTWARE. | ||
| ****************************************************************************/ | ||
|
|
||
| #ifndef JPEGDRIVERCORE_H | ||
| #define JPEGDRIVERCORE_H | ||
|
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| #include "gdal_priv.h" | ||
|
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| constexpr const char *DRIVER_NAME = "JPEG"; | ||
|
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| bool CPL_DLL JPEGDatasetIsJPEGLS(GDALOpenInfo *poOpenInfo); | ||
|
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| int CPL_DLL JPEGDriverIdentify(GDALOpenInfo *poOpenInfo); | ||
|
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| void CPL_DLL JPEGDriverSetCommonMetadata(GDALDriver *poDriver); | ||
|
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| #endif |
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