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/*
* Image plugin to VDR (C++)
*
* (C) 2006-2011 Andreas Brachold <vdr07 at deltab.de>
*
* This code is distributed under the terms and conditions of the
* GNU GENERAL PUBLIC LICENSE. See the file COPYING for details.
*
*/
extern "C" {
#include <libexif/exif-data.h>
#include <libexif/exif-ifd.h>
#include <libexif/exif-loader.h>
}
#include <sstream>
#include "player-image.h"
#include "control-image.h"
#include "exif.h"
#include <vdr/i18n.h>
// for backward compatible to libexif-0.6.12
#ifndef exif_entry_get_ifd
#define exif_entry_get_ifd(e) exif_content_get(e)
#define exif_tag_get_title_in_ifd(a,b) exif_tag_get_title(a)
#endif
static void callbackShowEntry (ExifEntry *e, void *pData)
{
if (!pData)
return;
char v[128];
std::ostream* po = (std::ostream*)pData;
if(exif_entry_get_value (e, v, 59)) {
(*po) << exif_tag_get_title_in_ifd (e->tag, exif_entry_get_ifd (e));
(*po) << ":\t";
(*po) << v;
(*po) << std::endl;
}
}
static void callbackShowIFD (ExifContent *content, void *pData)
{
exif_content_foreach_entry (content, callbackShowEntry, pData);
}
void TagList (std::ostream& o, ExifData *ed)
{
if (!ed)
return;
exif_data_foreach_content (ed, callbackShowIFD, &o);
}
static bool MarkerNodes (std::string& s, ExifData *d)
{
unsigned int i, c;
char v[1024], *p;
ExifMnoteData *md;
md = exif_data_get_mnote_data (d);
if (!md) {
return false;
}
c = exif_mnote_data_count (md);
for (i = 0; i < c; i++) {
p = exif_mnote_data_get_value (md, i, v, sizeof (v));
if (p && strlen(v)) {
const char * t = exif_mnote_data_get_title (md, i);
s += t ? t : "";
s += ":\t";
s += v;
s += "\n";
}
}
return true;
}
cImageMenuExif::cImageMenuExif(const char *szFileName)
: cOsdMenu(tr("Show exif informations from image"))
{
std::ostringstream o;
ExifData *d;
d = exif_data_new_from_file (szFileName);
if (d) {
MarkerNodes (m_strTextMarker, d);
TagList(o, d);
exif_data_unref (d);
} else {
o << tr("Could not load exif data from image!") << std::endl;
}
m_strTextTag = o.str();
m_bDisplayTags = true;
Display();
}
eOSState cImageMenuExif::ProcessKey(eKeys nKey)
{
switch (nKey & ~k_Repeat) {
case kUp:
case kDown:
case kLeft:
case kRight:
DisplayMenu()->Scroll(NORMALKEY(nKey) == kUp || NORMALKEY(nKey) == kLeft, NORMALKEY(nKey) == kLeft || NORMALKEY(nKey) == kRight);
return osContinue;
default: break;
}
eOSState nState = cOsdMenu::ProcessKey(nKey);
if (nState == osUnknown) {
switch (nKey) {
case kOk:
case kMenu:
case kBack:
case kBlue:
return osBack;
case kRed:
m_bDisplayTags = !m_bDisplayTags;
Display();
default: nState = osContinue;
}
}
return nState;
}
void cImageMenuExif::Display(void)
{
const char* szButton = NULL;
if(m_bDisplayTags) {
if(m_strTextMarker.length())
szButton = tr("Marker");
} else {
if(m_strTextTag.length())
szButton = tr("Tags");
}
SetHelp(szButton, NULL, NULL, tr("Back"));
cOsdMenu::Display();
DisplayMenu()->SetText(m_bDisplayTags
? m_strTextTag.c_str()
: m_strTextMarker.c_str(),true);
}
cOsdObject *cImageControl::GetInfo(void)
{
const char* szFile = FileName();
if(szFile)
return new cImageMenuExif(szFile);
return NULL;
}
//////////////////////////////////////////////////////////////////////////////
/** get value from exif tag
@return ExifShort - requestet value or 0 if failed
@param const char *filename - used file name
@param ExifTag etag - wanted exif Tag, see exif-tag.h*/
static ExifShort GetExifTag (const char *filename, ExifTag etag)
{
ExifData *edata;
unsigned int i, j;
edata = exif_data_new_from_file (filename);
if (edata == NULL)
return 0;
for (i = 0; i < EXIF_IFD_COUNT; i++) {
ExifContent *content = edata->ifd[i];
if (! edata->ifd[i] || ! edata->ifd[i]->count)
continue;
for (j = 0; j < content->count; j++) {
ExifEntry *e = content->entries[j];
if (! content->entries[j])
continue;
if (e->tag == etag) {
ExifByteOrder o = exif_data_get_byte_order (e->parent->parent);
ExifShort retval = exif_get_short (e->data, o);
exif_data_unref (edata);
return retval;
}
}
}
exif_data_unref (edata);
return 0;
}
//////////////////////////////////////////////////////////////////////////////
/** get rotation from exif data
@return ImageExifOrientation - requestet value or 0 if failed
@param int& rotate - reference for rotation
@param ImageMirror& mirror - reference for mirroring image */
ImageExifOrientation GetRotationFromExifData (const char *filename, int& rotate, ImageMirror& mirror)
{
ImageExifOrientation ieo = (ImageExifOrientation)GetExifTag (filename, EXIF_TAG_ORIENTATION);
switch (ieo) {
case IMAGE_EXIF_ORIENTATION_TOP_RIGHT:
rotate = 0;
mirror = MIRROR;
break;
case IMAGE_EXIF_ORIENTATION_BOTTOM_LEFT:
rotate = 180;
mirror = MIRROR;
break;
case IMAGE_EXIF_ORIENTATION_LEFT_TOP:
rotate = 90;
mirror = MIRROR;
break;
case IMAGE_EXIF_ORIENTATION_RIGHT_BOTTOM:
rotate = 90;
mirror = FLIP;
break;
case IMAGE_EXIF_ORIENTATION_TOP_LEFT:
rotate = 0;
mirror = NONE;
break;
case IMAGE_EXIF_ORIENTATION_RIGHT_TOP:
rotate = 90;
mirror = NONE;
break;
case IMAGE_EXIF_ORIENTATION_BOTTOM_RIGHT:
rotate = 180;
mirror = NONE;
break;
case IMAGE_EXIF_ORIENTATION_LEFT_BOTTOM:
rotate = 270;
mirror = NONE;
break;
default:
rotate = 0;
mirror = NONE;
break;
}
return ieo;
}
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