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/*
* Copyright © 2017-2020 Wellington Wallace
*
* This file is part of PulseEffects.
*
* PulseEffects is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PulseEffects is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PulseEffects. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PIPELINE_COMMON_HPP
#define PIPELINE_COMMON_HPP
#include <gio/gio.h>
#include <gst/gst.h>
#include <mutex>
#include "util.hpp"
template <typename T>
void update_effects_order(gpointer user_data) {
auto l = static_cast<T>(user_data);
// unlinking elements using old plugins order
gst_element_unlink(l->identity_in, l->plugins[l->plugins_order_old[0]]);
for (unsigned long int n = 1U; n < l->plugins_order_old.size(); n++) {
gst_element_unlink(l->plugins[l->plugins_order_old[n - 1U]], l->plugins[l->plugins_order_old[n]]);
}
gst_element_unlink(l->plugins[l->plugins_order_old.back()], l->identity_out);
// linking elements using the new plugins order
if (gst_element_link(l->identity_in, l->plugins[l->plugins_order[0]])) {
util::debug(l->log_tag + "linked identity_in to " + l->plugins_order[0]);
} else {
util::debug(l->log_tag + "failed to link identity_in to " + l->plugins_order[0]);
}
for (unsigned long int n = 1U; n < l->plugins_order.size(); n++) {
auto p1_name = l->plugins_order[n - 1U];
auto p2_name = l->plugins_order[n];
if (gst_element_link(l->plugins[p1_name], l->plugins[p2_name])) {
util::debug(l->log_tag + "linked " + p1_name + " to " + p2_name);
} else {
util::debug(l->log_tag + "failed to link " + p1_name + " to " + p2_name);
}
}
if (gst_element_link(l->plugins[l->plugins_order.back()], l->identity_out)) {
util::debug(l->log_tag + "linked " + l->plugins_order.back() + " to identity_out");
} else {
util::debug(l->log_tag + "failed to link " + l->plugins_order.back() + " to identity_out");
}
}
template <typename T>
auto check_update(gpointer user_data) -> bool {
auto l = static_cast<T>(user_data);
bool update = false;
gchar* name = nullptr;
GVariantIter* iter = nullptr;
g_settings_get(l->child_settings, "plugins", "as", &iter);
l->plugins_order_old = l->plugins_order;
l->plugins_order.clear();
while (g_variant_iter_next(iter, "s", &name)) {
l->plugins_order.emplace_back(name);
g_free(name);
}
g_variant_iter_free(iter);
if (l->plugins_order.size() != l->plugins_order_old.size()) {
update = true;
}
if (!std::equal(l->plugins_order.begin(), l->plugins_order.end(), l->plugins_order_old.begin())) {
update = true;
}
if (update) {
std::string list;
for (const auto& name : l->plugins_order) {
list += name + ",";
}
util::debug(l->log_tag + "new plugins order: [" + list + "]");
}
return update;
}
template <typename T>
auto event_probe_cb(GstPad* pad, GstPadProbeInfo* info, gpointer user_data) -> GstPadProbeReturn {
if (GST_EVENT_TYPE(GST_PAD_PROBE_INFO_DATA(info)) != GST_EVENT_CUSTOM_DOWNSTREAM) {
return GST_PAD_PROBE_PASS;
}
gst_pad_remove_probe(pad, GST_PAD_PROBE_INFO_ID(info));
if (check_update<T>(user_data)) {
update_effects_order<T>(user_data);
}
return GST_PAD_PROBE_DROP;
}
template <typename T>
auto on_pad_blocked(GstPad* pad, GstPadProbeInfo* info, gpointer user_data) -> GstPadProbeReturn {
auto l = static_cast<T>(user_data);
gst_pad_remove_probe(pad, GST_PAD_PROBE_INFO_ID(info));
auto srcpad = gst_element_get_static_pad(l->identity_out, "src");
gst_pad_add_probe(srcpad,
static_cast<GstPadProbeType>(GST_PAD_PROBE_TYPE_BLOCK | GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM),
event_probe_cb<T>, user_data, NULL);
auto sinkpad = gst_element_get_static_pad(l->queue_src, "sink");
GstStructure* s = gst_structure_new_empty("reorder_plugins");
GstEvent* event = gst_event_new_custom(GST_EVENT_CUSTOM_DOWNSTREAM, s);
gst_pad_send_event(sinkpad, event);
gst_object_unref(sinkpad);
gst_object_unref(srcpad);
return GST_PAD_PROBE_OK;
}
template <typename T>
auto on_pad_idle(GstPad* pad, GstPadProbeInfo* info, gpointer user_data) -> GstPadProbeReturn {
if (check_update<T>(user_data)) {
update_effects_order<T>(user_data);
}
return GST_PAD_PROBE_REMOVE;
}
template <typename T>
void on_plugins_order_changed(GSettings* settings, gchar* key, T* l) {
auto srcpad = gst_element_get_static_pad(l->source, "src");
GstState state;
GstState pending;
gst_element_get_state(l->pipeline, &state, &pending, 0);
if (state != GST_STATE_PLAYING) {
gst_pad_add_probe(srcpad, GST_PAD_PROBE_TYPE_IDLE, on_pad_idle<T*>, l, nullptr);
} else {
gst_pad_add_probe(srcpad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, on_pad_blocked<T*>, l, nullptr);
}
g_object_unref(srcpad);
}
#endif
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