FFmpeg 7.1 + cuframes input demuxer

Snapshot FFmpeg n7.1 (release tag) с применённым patch'ем для cuframes
input format. Используется как FFMPEG_REPO_OVERRIDE в NickM-27/FFmpeg-Builds
fork для статической сборки patched binary под Frigate (Debian 12 / glibc 2.36).

Apply changes:
  + libavformat/cuframesdec.c (новый — реализация демуксера)
  M libavformat/Makefile (CONFIG_CUFRAMES_DEMUXER target)
  M libavformat/allformats.c (extern declaration)
  M configure (--enable-libcuframes option + dep check)

Patch source: https://git.goldix.org/gx/cuframes (filter/ffmpeg-7.1-cuframes-demuxer.patch)

History сброшена (snapshot вместо fork) потому что upstream shallow clone
не позволял push в gitea. Полная история FFmpeg — на github.com/FFmpeg/FFmpeg n7.1.

libavfilter/dnn/queue.h

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2020
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stddef.h>
+
+#ifndef AVFILTER_DNN_QUEUE_H
+#define AVFILTER_DNN_QUEUE_H
+
+/**
+ * Linear double-ended data structure
+ */
+typedef struct Queue Queue;
+
+/**
+ * @brief Create a Queue instance.
+ * It initializes the length of the Queue as 0.
+ *
+ * @return Pointer to the Queue
+ * @retval NULL if allocation fails
+ */
+Queue *ff_queue_create(void);
+
+/**
+ * @brief Destroy the Queue instance.
+ * It also frees all elements of the Queue.
+ */
+void ff_queue_destroy(Queue *q);
+
+/**
+ * @brief Return the length of the Queue
+ */
+size_t ff_queue_size(Queue *q);
+
+/**
+ * @brief Return a pointer to the data
+ * at the head of the queue.
+ *
+ * @retval NULL if null pointer was passed
+ * or queue is empty
+ */
+void *ff_queue_peek_front(Queue *q);
+
+/**
+ * @brief Return a pointer to the data at
+ * the tail of the queue.
+ *
+ * @retval NULL if null pointer was passed
+ * or queue is empty
+ */
+void *ff_queue_peek_back(Queue *q);
+
+/**
+ * @brief Add data to the head of the queue.
+ * It increases the length of Queue by one.
+ *
+ * @param q pointer to the Queue.
+ * @param v data to be added
+ * @return The length of the Queue
+ * @retval 0 if the pointer to queue is NULL
+ * @retval -1 if new entry cannot be created
+ */
+int ff_queue_push_front(Queue *q, void *v);
+
+/**
+ * @brief Add data to the tail of the queue.
+ * It increases the length of Queue by one.
+ *
+ * @param q pointer to the Queue
+ * @param v data to be added
+ * @return The length of the Queue
+ * @retval 0 if the pointer to queue is NULL
+ * @retval -1 if new entry cannot be created
+ */
+int ff_queue_push_back(Queue *q, void *v);
+
+/**
+ * @brief Remove and free first element from
+ * the Queue. It shrinks the length of Queue
+ * by one.
+ *
+ * @param q pointer to the Queue.
+ * @return The value of first element as void.
+ * If a null pointer or empty queue is passed,
+ * it returns NULL
+ */
+void *ff_queue_pop_front(Queue *q);
+
+/**
+ * @brief Remove and free last element from
+ * the Queue. It shrinks the length of Queue
+ * by one.
+ *
+ * @param q pointer to the Queue.
+ * @return The value of last element as void.
+ * If a null pointer or empty queue is passed,
+ * it returns NULL
+ */
+void *ff_queue_pop_back(Queue *q);
+
+#endif