From 4a6d9312cc1c9d62d66c4def71246d9faae29edb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期三, 03 三月 2021 14:26:16 +0800
Subject: [PATCH] environment settings
---
module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/threadmessage.h | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 115 insertions(+), 0 deletions(-)
diff --git a/module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/threadmessage.h b/module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/threadmessage.h
new file mode 100644
index 0000000..42ce655
--- /dev/null
+++ b/module/VideoPlayer/lib/linux/ffmpeg/include/libavutil/threadmessage.h
@@ -0,0 +1,115 @@
+/*
+ * 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
+ */
+
+#ifndef AVUTIL_THREADMESSAGE_H
+#define AVUTIL_THREADMESSAGE_H
+
+typedef struct AVThreadMessageQueue AVThreadMessageQueue;
+
+typedef enum AVThreadMessageFlags {
+
+ /**
+ * Perform non-blocking operation.
+ * If this flag is set, send and recv operations are non-blocking and
+ * return AVERROR(EAGAIN) immediately if they can not proceed.
+ */
+ AV_THREAD_MESSAGE_NONBLOCK = 1,
+
+} AVThreadMessageFlags;
+
+/**
+ * Allocate a new message queue.
+ *
+ * @param mq pointer to the message queue
+ * @param nelem maximum number of elements in the queue
+ * @param elsize size of each element in the queue
+ * @return >=0 for success; <0 for error, in particular AVERROR(ENOSYS) if
+ * lavu was built without thread support
+ */
+int av_thread_message_queue_alloc(AVThreadMessageQueue **mq,
+ unsigned nelem,
+ unsigned elsize);
+
+/**
+ * Free a message queue.
+ *
+ * The message queue must no longer be in use by another thread.
+ */
+void av_thread_message_queue_free(AVThreadMessageQueue **mq);
+
+/**
+ * Send a message on the queue.
+ */
+int av_thread_message_queue_send(AVThreadMessageQueue *mq,
+ void *msg,
+ unsigned flags);
+
+/**
+ * Receive a message from the queue.
+ */
+int av_thread_message_queue_recv(AVThreadMessageQueue *mq,
+ void *msg,
+ unsigned flags);
+
+/**
+ * Set the sending error code.
+ *
+ * If the error code is set to non-zero, av_thread_message_queue_send() will
+ * return it immediately. Conventional values, such as AVERROR_EOF or
+ * AVERROR(EAGAIN), can be used to cause the sending thread to stop or
+ * suspend its operation.
+ */
+void av_thread_message_queue_set_err_send(AVThreadMessageQueue *mq,
+ int err);
+
+/**
+ * Set the receiving error code.
+ *
+ * If the error code is set to non-zero, av_thread_message_queue_recv() will
+ * return it immediately when there are no longer available messages.
+ * Conventional values, such as AVERROR_EOF or AVERROR(EAGAIN), can be used
+ * to cause the receiving thread to stop or suspend its operation.
+ */
+void av_thread_message_queue_set_err_recv(AVThreadMessageQueue *mq,
+ int err);
+
+/**
+ * Set the optional free message callback function which will be called if an
+ * operation is removing messages from the queue.
+ */
+void av_thread_message_queue_set_free_func(AVThreadMessageQueue *mq,
+ void (*free_func)(void *msg));
+
+/**
+ * Return the current number of messages in the queue.
+ *
+ * @return the current number of messages or AVERROR(ENOSYS) if lavu was built
+ * without thread support
+ */
+int av_thread_message_queue_nb_elems(AVThreadMessageQueue *mq);
+
+/**
+ * Flush the message queue
+ *
+ * This function is mostly equivalent to reading and free-ing every message
+ * except that it will be done in a single operation (no lock/unlock between
+ * reads).
+ */
+void av_thread_message_flush(AVThreadMessageQueue *mq);
+
+#endif /* AVUTIL_THREADMESSAGE_H */
--
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