v4l2: Extract video buffer structure to separate file

The v4l2_video_buffer structure describes a video buffer. It is used by
the v4l2_device class only, but isn't otherwise tied to V4L2. To prepare
for non-V4L2 video sources, extract it to a separate file and rename it
to video_buffer.

At the same time, add a new video_buffer_set structure to represent as
set of video buffers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/video-buffers.h b/video-buffers.h
new file mode 100644
index 0000000..001f75e
--- /dev/null
+++ b/video-buffers.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Video buffers
+ *
+ * Copyright (C) 2018 Laurent Pinchart
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+#ifndef __VIDEO_BUFFERS_H__
+#define __VIDEO_BUFFERS_H__
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/time.h>
+
+/*
+ *
+ * struct video_buffer - Video buffer information
+ * @index: Zero-based buffer index, limited to the number of buffers minus one
+ * @size: Size of the video memory, in bytes
+ * @bytesused: Number of bytes used by video data, smaller or equal to @size
+ * @timestamp: Time stamp at which the buffer has been captured
+ * @error: True if an error occured while capturing video data for the buffer
+ * @allocated: True if memory for the buffer has been allocated
+ * @mem: Video data memory
+ * @dmabuf: Video data dmabuf handle
+ */
+struct video_buffer
+{
+	unsigned int index;
+	unsigned int size;
+	unsigned int bytesused;
+	struct timeval timestamp;
+	bool error;
+	void *mem;
+	int dmabuf;
+};
+
+struct video_buffer_set
+{
+	struct video_buffer *buffers;
+	unsigned int nbufs;
+};
+
+struct video_buffer_set *video_buffer_set_new(unsigned int nbufs);
+void video_buffer_set_delete(struct video_buffer_set *buffers);
+
+#endif /* __VIDEO_BUFFERS_H__ */