Introduce and use dedicated v4l2 helpers to replace inline ioctls

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
2018-04-24 15:38:23 +02:00
parent 5139aa6731
commit c7f0d7684a
7 changed files with 385 additions and 201 deletions
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _V4L2_H_
+#define _V4L2_H_
+
+#define DESTINATION_SIZE_MAX					(1024 * 1024)
+
+bool v4l2_find_format(int video_fd, unsigned int type,
+	unsigned int pixelformat);
+int v4l2_set_format(int video_fd, unsigned int type, unsigned int pixelformat,
+	unsigned int width, unsigned int height);
+int v4l2_create_buffers(int video_fd, unsigned int type,
+	unsigned int buffers_count);
+int v4l2_request_buffer(int video_fd, unsigned int type, unsigned int index,
+	unsigned int *length, unsigned int *offset);
+int v4l2_queue_buffer(int video_fd, int request_fd, unsigned int type,
+	unsigned int index, unsigned int size);
+int v4l2_dequeue_buffer(int video_fd, int request_fd, unsigned int type,
+	unsigned int index);
+int v4l2_set_control(int video_fd, int request_fd, unsigned int id, void *data,
+	unsigned int size);
+int v4l2_set_stream(int video_fd, unsigned int type, bool enable);
+
+#endif