Break picture handling code from C++ to C.

This commit breaks the loading of images that were done in the divelist
into smaller bits. A bit of code refactor was done in order to correct the
placement of a few methods.

ShiftTimesDialog::EpochFromExiv got moved to Exif::epoch dive_add_picture
is now used instead of add_event picture_load_exif_data got implemented
using the old listview code.  dive_set_geodata_from_picture got
implemented using the old listview code.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

CMakeLists.txt

@@ -106,6 +106,7 @@ SET(SUBSURFACE_CORE_LIB_SRCS
 	#dirk ported some core functionality to c++.
 	qthelper.cpp
 	divecomputer.cpp
+	exif.cpp
 )
 
 #the interface, in C++
@@ -132,7 +133,6 @@ SET(SUBSURFACE_INTERFACE
 	qt-ui/starwidget.cpp
 	qt-ui/subsurfacewebservices.cpp
 	qt-ui/tableview.cpp
-	qt-ui/exif.cpp
 	qt-ui/divelogimportdialog.cpp
 	qt-ui/tagwidget.cpp
 	qt-ui/groupedlineedit.cpp

dive.c

@@ -2260,14 +2260,26 @@ int average_depth(struct diveplan *dive)
 	return integral / last_time;
 }
 
-void picture_load_exif_data(struct picture *p)
+struct picture *alloc_picture()
 {
-
+	struct picture *pic = malloc(sizeof(struct picture));
+	if (!pic)
+		exit(1);
+	memset(pic, 0, sizeof(struct picture));
+	return pic;
 }
 
-struct picture* dive_add_picture(struct dive *d, char *picture)
+void dive_add_picture(struct dive *d, struct picture *picture)
 {
-
+	if (d->picture_list == NULL) {
+		d->picture_list = picture;
+		return;
+	}
+	struct picture *last = d->picture_list;
+	while( last->next )
+		last = last->next;
+	last->next = picture;
+	return;
 }
 
 uint dive_get_picture_count(struct dive *d)
@@ -2278,7 +2290,15 @@ uint dive_get_picture_count(struct dive *d)
 	return i;
 }
 
-void dive_remove_picture(struct dive *d, char *picture)
+void dive_set_geodata_from_picture(struct dive *d, struct picture *pic)
+{
+	if (!d->latitude.udeg && pic->latitude.udeg) {
+		d->latitude = pic->latitude;
+		d->longitude = pic->longitude;
+	}
+}
+
+void dive_remove_picture(struct dive *d, struct picture *p)
 {
 
 }

dive.h

@@ -286,16 +286,21 @@ struct dive {
 struct picture {
 	char *filename;
 	time_t timestamp;
+	degrees_t latitude;
+	degrees_t longitude;
 	struct picture *next;
 };
 
 #define FOR_EACH_PICTURE( DIVE ) \
 	for(struct picture *picture = DIVE->picture_list; picture; picture = picture->next)
 
-extern struct picture *dive_add_picture(struct dive *d, char *picture);
-extern void dive_remove_picture(struct dive *d, char *picture);
+
+extern struct picture *alloc_picture();
+extern void dive_add_picture(struct dive *d, struct picture *pic);
+extern void dive_remove_picture(struct dive *d, struct picture *pic);
 extern uint dive_get_picture_count(struct dive *d);
 extern void picture_load_exif_data(struct picture *p);
+extern void dive_set_geodata_from_picture(struct dive *d, struct picture *pic);
 
 
 static inline int dive_has_gps_location(struct dive *dive)

exif.cpp

@@ -30,6 +30,7 @@
      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 #include <algorithm>
+#include "dive.h"
 #include "exif.h"
 
 using std::string;
@@ -566,3 +567,21 @@ void EXIFInfo::clear()
 	GeoLocation.LonComponents.seconds = 0;
 	GeoLocation.LonComponents.direction = 0;
 }
+
+time_t EXIFInfo::epoch()
+{
+	struct tm tm;
+	int year, month, day, hour, min, sec;
+
+	if (DateTimeOriginal.size())
+		sscanf(DateTimeOriginal.c_str(), "%d:%d:%d %d:%d:%d", &year, &month, &day, &hour, &min, &sec);
+	else
+		sscanf(DateTime.c_str(), "%d:%d:%d %d:%d:%d", &year, &month, &day, &hour, &min, &sec);
+	tm.tm_year = year;
+	tm.tm_mon = month - 1;
+	tm.tm_mday = day;
+	tm.tm_hour = hour;
+	tm.tm_min = min;
+	tm.tm_sec = sec;
+	return (utc_mktime(&tm));
+}

exif.h

@@ -129,6 +129,8 @@ public:
 	{
 		clear();
 	}
+
+	time_t epoch();
 };
 
 // Parse was successful

qt-ui/divelistview.cpp

@@ -764,63 +764,33 @@ void DiveListView::shiftTimes()
 
 void DiveListView::loadImages()
 {
-	struct memblock mem;
-	EXIFInfo exif;
-	int retval;
-	time_t imagetime;
-	struct divecomputer *dc;
-	time_t when;
-	int duration_s;
 	QStringList fileNames = QFileDialog::getOpenFileNames(this, tr("Open Image Files"), lastUsedImageDir(), tr("Image Files (*.jpg *.jpeg *.pnm *.tif *.tiff)"));
-
 	if (fileNames.isEmpty())
 		return;
 
 	updateLastUsedImageDir(QFileInfo(fileNames[0]).dir().path());
-
 	ShiftImageTimesDialog shiftDialog(this);
 	shiftDialog.setOffset(lastImageTimeOffset());
 	shiftDialog.exec();
 	updateLastImageTimeOffset(shiftDialog.amount());
 
-	for (int i = 0; i < fileNames.size(); ++i) {
-		if (readfile(fileNames.at(i).toUtf8().data(), &mem) <= 0)
-			continue;
-		//TODO: This inner code should be ported to C-Code.
-		retval = exif.parseFrom((const unsigned char *)mem.buffer, (unsigned)mem.size);
-		free(mem.buffer);
-		if (retval != PARSE_EXIF_SUCCESS)
-			continue;
-		imagetime = shiftDialog.epochFromExiv(&exif);
-		if (!imagetime)
-			continue;
-		imagetime += shiftDialog.amount(); // TODO: this should be cached and passed to the C-function
+	Q_FOREACH(const QString& fileName, fileNames) {
+		picture *p = alloc_picture();
+		p->filename = qstrdup(fileName.toUtf8().data());
+		picture_load_exif_data(p);
+
+		if (p->timestamp)
+			p->timestamp += shiftDialog.amount(); // TODO: this should be cached and passed to the C-function
 		int j = 0;
 		struct dive *dive;
 		for_each_dive (j, dive) {
 			if (!dive->selected)
 				continue;
-			for_each_dc (dive, dc) {
-				when = dc->when ? dc->when : dive->when;
-				duration_s = dc->duration.seconds ? dc->duration.seconds : dive->duration.seconds;
-				if (when - 3600 < imagetime && when + duration_s + 3600 > imagetime) {
-					if (when > imagetime) {
-						// Before dive
-						add_event(dc, 0, 123, 0, 0, fileNames.at(i).toUtf8().data());
-					} else if (when + duration_s < imagetime) {
-						// After dive
-						add_event(dc, duration_s, 123, 0, 0, fileNames.at(i).toUtf8().data());
-					} else {
-						add_event(dc, imagetime - when, 123, 0, 0, fileNames.at(i).toUtf8().data());
-					}
-					if (!dive->latitude.udeg && !IS_FP_SAME(exif.GeoLocation.Latitude, 0.0)) {
-						dive->latitude.udeg = lrint(1000000.0 * exif.GeoLocation.Latitude);
-						dive->longitude.udeg = lrint(1000000.0 * exif.GeoLocation.Longitude);
-					}
-				}
-			}
+			dive_add_picture(dive, p);
+			dive_set_geodata_from_picture(dive, p);
 		}
 	}
+
 	mark_divelist_changed(true);
 	MainWindow::instance()->refreshDisplay();
 	MainWindow::instance()->graphics()->replot();

qt-ui/simplewidgets.cpp

@@ -247,31 +247,12 @@ void ShiftImageTimesDialog::syncCameraClicked()
 	free(mem.buffer);
 	if (retval != PARSE_EXIF_SUCCESS)
 		return;
-	dcImageEpoch = epochFromExiv(&exiv);
+	dcImageEpoch = exiv.epoch();
 	dcDateTime.setTime_t(dcImageEpoch);
 	ui.dcTime->setDateTime(dcDateTime);
 	connect(ui.dcTime, SIGNAL(dateTimeChanged(const QDateTime &)), this, SLOT(dcDateTimeChanged(const QDateTime &)));
 }
 
-//TODO: This should be moved to C-Code.
-time_t ShiftImageTimesDialog::epochFromExiv(EXIFInfo *exif)
-{
-	struct tm tm;
-	int year, month, day, hour, min, sec;
-
-	if (strlen(exif->DateTimeOriginal.c_str()))
-		sscanf(exif->DateTimeOriginal.c_str(), "%d:%d:%d %d:%d:%d", &year, &month, &day, &hour, &min, &sec);
-	else
-		sscanf(exif->DateTime.c_str(), "%d:%d:%d %d:%d:%d", &year, &month, &day, &hour, &min, &sec);
-	tm.tm_year = year;
-	tm.tm_mon = month - 1;
-	tm.tm_mday = day;
-	tm.tm_hour = hour;
-	tm.tm_min = min;
-	tm.tm_sec = sec;
-	return (utc_mktime(&tm));
-}
-
 void ShiftImageTimesDialog::dcDateTimeChanged(const QDateTime &newDateTime)
 {
 	if (!dcImageEpoch)

qthelper.cpp

@@ -1,5 +1,8 @@
 #include "qthelper.h"
 #include "qt-gui.h"
+#include "dive.h"
+#include <exif.h>
+#include "file.h"
 #include <QRegExp>
 #include <QDir>
 
@@ -260,3 +263,20 @@ extern "C" xsltStylesheetPtr get_stylesheet(const char *name)
 
 	return xslt;
 }
+
+extern "C" void picture_load_exif_data(struct picture *p)
+{
+	EXIFInfo exif;
+	memblock mem;
+
+	if (readfile(p->filename, &mem) <= 0)
+		goto picture_load_exit;
+	if (exif.parseFrom((const unsigned char *)mem.buffer, (unsigned)mem.size) != PARSE_EXIF_SUCCESS)
+		goto picture_load_exit;
+	p->timestamp = exif.epoch();
+	p->longitude.udeg= lrint(1000000.0 * exif.GeoLocation.Longitude);
+	p->latitude.udeg  = lrint(1000000.0 * exif.GeoLocation.Latitude);
+	picture_load_exit:
+		free(mem.buffer);
+		return;
+}

subsurface.pro

@@ -58,7 +58,7 @@ HEADERS = \
 	qt-ui/starwidget.h \
 	qt-ui/subsurfacewebservices.h \
 	qt-ui/tableview.h \
-	qt-ui/exif.h \
+	exif.h \
 	sha1.h \
 	statistics.h \
 	subsurfacestartup.h \
@@ -131,7 +131,7 @@ SOURCES =  \
 	qt-ui/starwidget.cpp \
 	qt-ui/subsurfacewebservices.cpp \
 	qt-ui/tableview.cpp \
-	qt-ui/exif.cpp \
+	exif.cpp \
 	save-git.c \
 	save-xml.c \
 	sha1.c \