latest SDK

foobar2000/helpers/track_property_callback_impl.cpp

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+#include "StdAfx.h"
+
+#include <list>
+#include <memory>
+
+#include "track_property_callback_impl.h"
+
+
+void track_property_callback_impl::set_property(const char * p_group, double p_sortpriority, const char * p_name, const char * p_value) {
+	propertyname_container temp;
+	temp.m_name = p_name;
+	temp.m_priority = p_sortpriority;
+
+	pfc::string8 fixEOL;
+	if (m_cutMultiLine && strchr(p_value, '\n') != nullptr) {
+		fixEOL = p_value; fixEOL.fix_eol(); p_value = fixEOL;
+	}
+
+	m_entries.find_or_add(p_group).set(temp, p_value);
+}
+
+bool track_property_callback_impl::is_group_wanted(const char * p_group) {
+	if (m_groupFilter) return m_groupFilter(p_group);
+	return true;
+}
+
+void track_property_callback_impl::merge(track_property_callback_impl const & other) {
+	for (auto iterGroup = other.m_entries.first(); iterGroup.is_valid(); ++iterGroup) {
+		auto & in = iterGroup->m_value;
+		auto & out = m_entries[iterGroup->m_key];
+		for (auto iterEntry = in.first(); iterEntry.is_valid(); ++iterEntry) {
+			out.set(iterEntry->m_key, iterEntry->m_value);
+		}
+	}
+}
+
+static bool is_filtered_info_field(const char * p_name) {
+	service_ptr_t<track_property_provider> ptr;
+	service_enum_t<track_property_provider> e;
+	while (e.next(ptr)) {
+		if (ptr->is_our_tech_info(p_name)) return true;
+	}
+	return false;
+}
+
+static const char strGroupOther[] = "Other";
+
+static void enumOtherHere(track_property_callback_impl & callback, metadb_info_container::ptr info_) {
+	const file_info * infoptr = &info_->info();
+	for (t_size n = 0, m = infoptr->info_get_count(); n < m; n++) {
+		const char * name = infoptr->info_enum_name(n);
+		if (!is_filtered_info_field(name)) {
+			pfc::string_formatter temp;
+			temp << "<";
+			uAddStringUpper(temp, name);
+			temp << ">";
+			callback.set_property("Other", 0, temp, infoptr->info_enum_value(n));
+		}
+	}
+}
+
+static void enumOther( track_property_callback_impl & callback, metadb_handle_list_cref items, track_property_provider_v3_info_source * infoSource ) {
+	if (items.get_count() == 1 ) {
+		enumOtherHere(callback, infoSource->get_info(0) );
+	}
+}
+
+void enumerateTrackProperties( track_property_callback_impl & callback, std::function< metadb_handle_list_cref () > itemsSource, std::function<track_property_provider_v3_info_source*()> infoSource, std::function<abort_callback& () > abortSource) {
+	
+
+	if ( core_api::is_main_thread() ) {
+		// should not get here like this
+		// but that does make our job easier
+		auto & items = itemsSource();
+		auto info = infoSource();
+		track_property_provider::ptr ptr;
+		service_enum_t<track_property_provider> e;
+		while (e.next(ptr)) {
+			ptr->enumerate_properties_helper(items, info, callback, abortSource() );
+		}
+		if ( callback.is_group_wanted( strGroupOther ) ) {
+			enumOther(callback, items, info );
+		}
+		return;
+	}
+
+	std::list<std::shared_ptr<pfc::event> > lstWaitFor;
+	std::list<std::shared_ptr< track_property_callback_impl > > lstMerge;
+	track_property_provider::ptr ptr;
+	service_enum_t<track_property_provider> e;
+	while (e.next(ptr)) {
+		auto evt = std::make_shared<pfc::event>();
+		auto cb = std::make_shared< track_property_callback_impl >(callback); // clone watched group info
+		auto work = [ptr, itemsSource, evt, cb, infoSource, abortSource] {
+			try {
+				ptr->enumerate_properties_helper(itemsSource(), infoSource(), *cb, abortSource());
+			} catch (...) {}
+			evt->set_state(true);
+		};
+
+		track_property_provider_v4::ptr v4;
+		if (v4 &= ptr) {
+			// Supports v4 = split a worker thread, work in parallel
+			pfc::splitThread(work);
+		} else {
+			// No v4 = delegate to main thread. Ugly but gets the job done.
+			fb2k::inMainThread(work);
+		}
+
+		lstWaitFor.push_back(std::move(evt));
+		lstMerge.push_back(std::move(cb));
+	}
+
+	if (callback.is_group_wanted(strGroupOther)) {
+		enumOther(callback, itemsSource(), infoSource());
+	}
+
+	for (auto i = lstWaitFor.begin(); i != lstWaitFor.end(); ++i) {
+		abortSource().waitForEvent(**i, -1);
+	}
+	for (auto i = lstMerge.begin(); i != lstMerge.end(); ++i) {
+		callback.merge(** i);
+	}
+}