401 lines
12 KiB
Diff
401 lines
12 KiB
Diff
--- a/src/player/mpvobject.h
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+++ b/src/player/mpvobject.h
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@@ -21,7 +21,7 @@ typedef mpv_opengl_cb_context mpv_context;
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typedef mpv_render_context mpv_context;
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#endif
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-#include <mpv/qthelper.hpp>
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+#include "qthelper.hpp"
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class MpvRenderer;
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--- /dev/null
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+++ b/src/player/qthelper.hpp
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@@ -0,0 +1,386 @@
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+/* Copyright (C) 2017 the mpv developers
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+ *
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+ * Permission to use, copy, modify, and/or distribute this software for any
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+ * purpose with or without fee is hereby granted, provided that the above
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+ * copyright notice and this permission notice appear in all copies.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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+ */
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+
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+#ifndef MPV_CLIENT_API_QTHELPER_H_
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+#define MPV_CLIENT_API_QTHELPER_H_
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+
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+#include <mpv/client.h>
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+
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+#if !MPV_ENABLE_DEPRECATED
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+#error "This helper is deprecated. Copy it into your project instead."
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+#else
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+
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+/**
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+ * Note: these helpers are provided for convenience for C++/Qt applications.
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+ * This is based on the public API in client.h, and it does not encode any
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+ * knowledge that is not known or guaranteed outside of the C client API. You
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+ * can even copy and modify this code as you like, or implement similar things
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+ * for other languages.
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+ */
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+
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+#include <cstring>
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+
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+#include <QVariant>
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+#include <QString>
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+#include <QList>
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+#include <QHash>
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+#include <QSharedPointer>
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+#include <QMetaType>
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+
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+namespace mpv {
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+namespace qt {
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+
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+// Wrapper around mpv_handle. Does refcounting under the hood.
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+class Handle
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+{
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+ struct container {
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+ container(mpv_handle *h) : mpv(h) {}
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+ ~container() { mpv_terminate_destroy(mpv); }
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+ mpv_handle *mpv;
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+ };
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+ QSharedPointer<container> sptr;
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+public:
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+ // Construct a new Handle from a raw mpv_handle with refcount 1. If the
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+ // last Handle goes out of scope, the mpv_handle will be destroyed with
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+ // mpv_terminate_destroy().
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+ // Never destroy the mpv_handle manually when using this wrapper. You
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+ // will create dangling pointers. Just let the wrapper take care of
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+ // destroying the mpv_handle.
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+ // Never create multiple wrappers from the same raw mpv_handle; copy the
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+ // wrapper instead (that's what it's for).
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+ static Handle FromRawHandle(mpv_handle *handle) {
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+ Handle h;
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+ h.sptr = QSharedPointer<container>(new container(handle));
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+ return h;
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+ }
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+
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+ // Return the raw handle; for use with the libmpv C API.
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+ operator mpv_handle*() const { return sptr ? (*sptr).mpv : 0; }
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+};
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+
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+static inline QVariant node_to_variant(const mpv_node *node)
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+{
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+ switch (node->format) {
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+ case MPV_FORMAT_STRING:
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+ return QVariant(QString::fromUtf8(node->u.string));
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+ case MPV_FORMAT_FLAG:
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+ return QVariant(static_cast<bool>(node->u.flag));
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+ case MPV_FORMAT_INT64:
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+ return QVariant(static_cast<qlonglong>(node->u.int64));
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+ case MPV_FORMAT_DOUBLE:
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+ return QVariant(node->u.double_);
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+ case MPV_FORMAT_NODE_ARRAY: {
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+ mpv_node_list *list = node->u.list;
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+ QVariantList qlist;
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+ for (int n = 0; n < list->num; n++)
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+ qlist.append(node_to_variant(&list->values[n]));
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+ return QVariant(qlist);
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+ }
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+ case MPV_FORMAT_NODE_MAP: {
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+ mpv_node_list *list = node->u.list;
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+ QVariantMap qmap;
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+ for (int n = 0; n < list->num; n++) {
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+ qmap.insert(QString::fromUtf8(list->keys[n]),
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+ node_to_variant(&list->values[n]));
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+ }
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+ return QVariant(qmap);
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+ }
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+ default: // MPV_FORMAT_NONE, unknown values (e.g. future extensions)
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+ return QVariant();
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+ }
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+}
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+
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+struct node_builder {
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+ node_builder(const QVariant& v) {
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+ set(&node_, v);
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+ }
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+ ~node_builder() {
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+ free_node(&node_);
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+ }
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+ mpv_node *node() { return &node_; }
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+private:
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+ Q_DISABLE_COPY(node_builder)
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+ mpv_node node_;
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+ mpv_node_list *create_list(mpv_node *dst, bool is_map, int num) {
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+ dst->format = is_map ? MPV_FORMAT_NODE_MAP : MPV_FORMAT_NODE_ARRAY;
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+ mpv_node_list *list = new mpv_node_list();
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+ dst->u.list = list;
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+ if (!list)
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+ goto err;
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+ list->values = new mpv_node[num]();
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+ if (!list->values)
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+ goto err;
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+ if (is_map) {
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+ list->keys = new char*[num]();
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+ if (!list->keys)
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+ goto err;
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+ }
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+ return list;
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+ err:
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+ free_node(dst);
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+ return NULL;
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+ }
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+ char *dup_qstring(const QString &s) {
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+ QByteArray b = s.toUtf8();
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+ char *r = new char[b.size() + 1];
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+ if (r)
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+ std::memcpy(r, b.data(), b.size() + 1);
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+ return r;
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+ }
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+ bool test_type(const QVariant &v, QMetaType::Type t) {
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+ // The Qt docs say: "Although this function is declared as returning
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+ // "QVariant::Type(obsolete), the return value should be interpreted
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+ // as QMetaType::Type."
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+ // So a cast really seems to be needed to avoid warnings (urgh).
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+ return static_cast<int>(v.type()) == static_cast<int>(t);
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+ }
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+ void set(mpv_node *dst, const QVariant &src) {
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+ if (test_type(src, QMetaType::QString)) {
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+ dst->format = MPV_FORMAT_STRING;
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+ dst->u.string = dup_qstring(src.toString());
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+ if (!dst->u.string)
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+ goto fail;
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+ } else if (test_type(src, QMetaType::Bool)) {
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+ dst->format = MPV_FORMAT_FLAG;
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+ dst->u.flag = src.toBool() ? 1 : 0;
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+ } else if (test_type(src, QMetaType::Int) ||
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+ test_type(src, QMetaType::LongLong) ||
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+ test_type(src, QMetaType::UInt) ||
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+ test_type(src, QMetaType::ULongLong))
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+ {
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+ dst->format = MPV_FORMAT_INT64;
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+ dst->u.int64 = src.toLongLong();
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+ } else if (test_type(src, QMetaType::Double)) {
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+ dst->format = MPV_FORMAT_DOUBLE;
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+ dst->u.double_ = src.toDouble();
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+ } else if (src.canConvert<QVariantList>()) {
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+ QVariantList qlist = src.toList();
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+ mpv_node_list *list = create_list(dst, false, qlist.size());
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+ if (!list)
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+ goto fail;
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+ list->num = qlist.size();
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+ for (int n = 0; n < qlist.size(); n++)
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+ set(&list->values[n], qlist[n]);
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+ } else if (src.canConvert<QVariantMap>()) {
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+ QVariantMap qmap = src.toMap();
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+ mpv_node_list *list = create_list(dst, true, qmap.size());
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+ if (!list)
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+ goto fail;
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+ list->num = qmap.size();
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+ for (int n = 0; n < qmap.size(); n++) {
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+ list->keys[n] = dup_qstring(qmap.keys()[n]);
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+ if (!list->keys[n]) {
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+ free_node(dst);
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+ goto fail;
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+ }
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+ set(&list->values[n], qmap.values()[n]);
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+ }
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+ } else {
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+ goto fail;
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+ }
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+ return;
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+ fail:
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+ dst->format = MPV_FORMAT_NONE;
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+ }
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+ void free_node(mpv_node *dst) {
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+ switch (dst->format) {
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+ case MPV_FORMAT_STRING:
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+ delete[] dst->u.string;
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+ break;
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+ case MPV_FORMAT_NODE_ARRAY:
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+ case MPV_FORMAT_NODE_MAP: {
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+ mpv_node_list *list = dst->u.list;
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+ if (list) {
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+ for (int n = 0; n < list->num; n++) {
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+ if (list->keys)
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+ delete[] list->keys[n];
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+ if (list->values)
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+ free_node(&list->values[n]);
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+ }
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+ delete[] list->keys;
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+ delete[] list->values;
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+ }
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+ delete list;
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+ break;
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+ }
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+ default: ;
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+ }
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+ dst->format = MPV_FORMAT_NONE;
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+ }
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+};
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+
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+/**
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+ * RAII wrapper that calls mpv_free_node_contents() on the pointer.
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+ */
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+struct node_autofree {
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+ mpv_node *ptr;
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+ node_autofree(mpv_node *a_ptr) : ptr(a_ptr) {}
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+ ~node_autofree() { mpv_free_node_contents(ptr); }
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+};
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+
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+#if MPV_ENABLE_DEPRECATED
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+
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+/**
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+ * Return the given property as mpv_node converted to QVariant, or QVariant()
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+ * on error.
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+ *
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+ * @deprecated use get_property() instead
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+ *
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+ * @param name the property name
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+ */
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+static inline QVariant get_property_variant(mpv_handle *ctx, const QString &name)
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+{
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+ mpv_node node;
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+ if (mpv_get_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, &node) < 0)
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+ return QVariant();
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+ node_autofree f(&node);
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+ return node_to_variant(&node);
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+}
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+
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+/**
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+ * Set the given property as mpv_node converted from the QVariant argument.
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+
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+ * @deprecated use set_property() instead
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+ */
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+static inline int set_property_variant(mpv_handle *ctx, const QString &name,
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+ const QVariant &v)
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+{
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+ node_builder node(v);
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+ return mpv_set_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, node.node());
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+}
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+
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+/**
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+ * Set the given option as mpv_node converted from the QVariant argument.
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+ *
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+ * @deprecated use set_property() instead
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+ */
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+static inline int set_option_variant(mpv_handle *ctx, const QString &name,
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+ const QVariant &v)
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+{
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+ node_builder node(v);
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+ return mpv_set_option(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, node.node());
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+}
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+
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+/**
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+ * mpv_command_node() equivalent. Returns QVariant() on error (and
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+ * unfortunately, the same on success).
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+ *
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+ * @deprecated use command() instead
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+ */
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+static inline QVariant command_variant(mpv_handle *ctx, const QVariant &args)
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+{
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+ node_builder node(args);
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+ mpv_node res;
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+ if (mpv_command_node(ctx, node.node(), &res) < 0)
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+ return QVariant();
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+ node_autofree f(&res);
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+ return node_to_variant(&res);
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+}
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+
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+#endif
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+
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+/**
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+ * This is used to return error codes wrapped in QVariant for functions which
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+ * return QVariant.
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+ *
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+ * You can use get_error() or is_error() to extract the error status from a
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+ * QVariant value.
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+ */
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+struct ErrorReturn
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+{
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+ /**
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+ * enum mpv_error value (or a value outside of it if ABI was extended)
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+ */
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+ int error;
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+
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+ ErrorReturn() : error(0) {}
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+ explicit ErrorReturn(int err) : error(err) {}
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+};
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+
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+/**
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+ * Return the mpv error code packed into a QVariant, or 0 (success) if it's not
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+ * an error value.
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+ *
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+ * @return error code (<0) or success (>=0)
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+ */
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+static inline int get_error(const QVariant &v)
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+{
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+ if (!v.canConvert<ErrorReturn>())
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+ return 0;
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+ return v.value<ErrorReturn>().error;
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+}
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+
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+/**
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+ * Return whether the QVariant carries a mpv error code.
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+ */
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+static inline bool is_error(const QVariant &v)
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+{
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+ return get_error(v) < 0;
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+}
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+
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+/**
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+ * Return the given property as mpv_node converted to QVariant, or QVariant()
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+ * on error.
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+ *
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+ * @param name the property name
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+ * @return the property value, or an ErrorReturn with the error code
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+ */
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+static inline QVariant get_property(mpv_handle *ctx, const QString &name)
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+{
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+ mpv_node node;
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+ int err = mpv_get_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, &node);
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+ if (err < 0)
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+ return QVariant::fromValue(ErrorReturn(err));
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+ node_autofree f(&node);
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+ return node_to_variant(&node);
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+}
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+
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+/**
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+ * Set the given property as mpv_node converted from the QVariant argument.
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+ *
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+ * @return mpv error code (<0 on error, >= 0 on success)
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+ */
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+static inline int set_property(mpv_handle *ctx, const QString &name,
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+ const QVariant &v)
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+{
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+ node_builder node(v);
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+ return mpv_set_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, node.node());
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+}
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+
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+/**
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+ * mpv_command_node() equivalent.
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+ *
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+ * @param args command arguments, with args[0] being the command name as string
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+ * @return the property value, or an ErrorReturn with the error code
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+ */
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+static inline QVariant command(mpv_handle *ctx, const QVariant &args)
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+{
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+ node_builder node(args);
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+ mpv_node res;
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+ int err = mpv_command_node(ctx, node.node(), &res);
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+ if (err < 0)
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+ return QVariant::fromValue(ErrorReturn(err));
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+ node_autofree f(&res);
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+ return node_to_variant(&res);
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+}
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+
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+}
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+}
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+
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+Q_DECLARE_METATYPE(mpv::qt::ErrorReturn)
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+
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+#endif /* else #if MPV_ENABLE_DEPRECATED */
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+
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+#endif
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