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Picture handling: change data structure to store offset instead timestamp

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It makes no sense to store a 64bit time stamp with every picture. Even the
32bit offset (in seconds) from the dive start is WAY overkill. But
switching to that makes the code much more simple in a number of spots.
And makes what is saved to the XML file easier to read, too.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2014-06-08 17:17:49 -07:00
parent 3a14076b1d
commit 1604299a5b
5 changed files with 13 additions and 12 deletions
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9
dive.c
View file

@ -2283,13 +2283,14 @@ static bool new_picture_for_dive(struct dive *d, char *filename)
void dive_create_picture(struct dive *d, char *filename, int shift_time)
{
timestamp_t timestamp;
if (!new_picture_for_dive(d, filename))
return;
struct picture *p = alloc_picture();
p->filename = filename;
picture_load_exif_data(p);
if (p->timestamp)
p->timestamp += shift_time;
picture_load_exif_data(p, &timestamp);
if (timestamp)
p->offset = timestamp - d->when + shift_time;
dive_add_picture(d, p);
dive_set_geodata_from_picture(d, p);
}
@ -2298,7 +2299,7 @@ void dive_add_picture(struct dive *d, struct picture *newpic)
{
struct picture **pic_ptr = &d->picture_list;
/* let's keep the list sorted by time */
while( *pic_ptr && (*pic_ptr)->timestamp < newpic->timestamp )
while( *pic_ptr && (*pic_ptr)->offset < newpic->offset )
pic_ptr = &(*pic_ptr)->next;
newpic->next = *pic_ptr;
*pic_ptr = newpic;

4
dive.h
View file

@ -289,7 +289,7 @@ struct dive {
/* picture list and methods related to dive picture handling */
struct picture {
char *filename;
time_t timestamp;
int32_t offset;
degrees_t latitude;
degrees_t longitude;
struct picture *next;
@ -305,7 +305,7 @@ extern void dive_create_picture(struct dive *d, char *filename, int shift_time);
extern void dive_add_picture(struct dive *d, struct picture *newpic);
extern void dive_remove_picture(struct dive *d, struct picture *pic);
extern unsigned int dive_get_picture_count(struct dive *d);
extern void picture_load_exif_data(struct picture *p);
extern void picture_load_exif_data(struct picture *p, timestamp_t *timestamp);
extern void dive_set_geodata_from_picture(struct dive *d, struct picture *pic);

4
qt-ui/profile/profilewidget2.cpp
View file

@ -1307,13 +1307,13 @@ void ProfileWidget2::plotPictures()
struct picture *pic = (struct picture*) m->index(i,1).data(Qt::UserRole).value<void*>();
// it's a correct picture, but doesn't have a timestamp: only show on the widget near the
// information area.
if (!pic->timestamp)
if (!pic->offset)
continue;
DivePictureItem *item = new DivePictureItem();
item->setPixmap(m->index(i,0).data(Qt::DecorationRole).value<QPixmap>());
// let's put the picture at the correct time, but at a fixed "depth" on the profile
// not sure this is ideal, but it seems to look right.
x = timeAxis->posAtValue(pic->timestamp - current_dive->when);
x = timeAxis->posAtValue(pic->offset);
if (i == 0)
y = 10;
else

4
qthelper.cpp
View file

@ -264,7 +264,7 @@ extern "C" xsltStylesheetPtr get_stylesheet(const char *name)
return xslt;
}
extern "C" void picture_load_exif_data(struct picture *p)
extern "C" void picture_load_exif_data(struct picture *p, timestamp_t *timestamp)
{
EXIFInfo exif;
memblock mem;
@ -273,7 +273,7 @@ extern "C" void picture_load_exif_data(struct picture *p)
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();
*timestamp = exif.epoch();
p->longitude.udeg= lrint(1000000.0 * exif.GeoLocation.Longitude);
p->latitude.udeg = lrint(1000000.0 * exif.GeoLocation.Latitude);
picture_load_exit:

4
save-xml.c
View file

@ -333,8 +333,8 @@ static void save_picture(struct membuffer *b, struct picture *pic)
put_string(b, " <picture filename='");
put_string(b, pic->filename);
put_string(b, "'");
if (pic->timestamp)
put_format(b, " timestamp='%ld'", pic->timestamp);
if (pic->offset)
put_format(b, " offset='%d'", pic->offset);
if (pic->latitude.udeg || pic->longitude.udeg) {
put_degrees(b, pic->latitude, " gps='", " ");
put_degrees(b, pic->longitude, "", "'");