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metadata: cache recent files for faster operation

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(cherry picked from commit 6ee014ddb7ab77537289e1f41f13345e5db54710)
This commit is contained in:
Alberto Griggio
2019-12-09 04:27:13 -08:00
committed by Lawrence Lee
parent e3f3b8ae91
commit e7fdad875a
3 changed files with 31 additions and 16 deletions
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22
rtengine/metadata.cc
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@@ -21,6 +21,7 @@
#include <stdio.h>
#include <glib/gstdio.h>
#include <iostream>
#include <giomm.h>
#include "metadata.h"
#include "settings.h"
@@ -32,9 +33,12 @@ namespace rtengine {
extern const Settings *settings;
std::unique_ptr<Exiv2Metadata::ImageCache> Exiv2Metadata::cache_(nullptr);
namespace {
constexpr size_t IMAGE_CACHE_SIZE = 200;
Exiv2::Image::AutoPtr open_exiv2(const Glib::ustring& fname)
{
#ifdef EXV_UNICODE_PATH
@@ -88,10 +92,19 @@ Exiv2Metadata::Exiv2Metadata(const Glib::ustring &path, bool merge_xmp_sidecar):
void Exiv2Metadata::load() const
{
if (!src_.empty() && !image_.get()) {
auto img = open_exiv2(src_);
image_.reset(img.release());
image_->readMetadata();
if (!src_.empty() && !image_.get() && Glib::file_test(src_.c_str(), Glib::FILE_TEST_EXISTS)) {
CacheVal val;
auto finfo = Gio::File::create_for_path(src_)->query_info(G_FILE_ATTRIBUTE_TIME_MODIFIED);
if (cache_ && cache_->get(src_, val) && val.second >= finfo->modification_time()) {
image_ = val.first;
} else {
auto img = open_exiv2(src_);
image_.reset(img.release());
image_->readMetadata();
if (cache_) {
cache_->set(src_, CacheVal(image_, finfo->modification_time()));
}
}
if (merge_xmp_) {
do_merge_xmp(image_.get());
@@ -319,6 +332,7 @@ Exiv2::XmpData Exiv2Metadata::getXmpSidecar(const Glib::ustring &path)
void Exiv2Metadata::init()
{
cache_.reset(new ImageCache(IMAGE_CACHE_SIZE));
Exiv2::XmpParser::initialize();
}