omap3-isp-live: Initial commit

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

1 files changed, 87 insertions, 0 deletions

diff --git a/isp/v4l2-pool.h b/isp/v4l2-pool.h
new file mode 100644
index 0000000..32f3b3b
--- /dev/null
+++ b/isp/v4l2-pool.h
@@ -0,0 +1,87 @@
+/*
+ * OMAP3 ISP library - V4L2 buffers pool
+ *
+ * Copyright (C) 2010-2011 Ideas on board SPRL
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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.
+ *
+ * This library 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef __V4L2_POOL_H
+#define __V4L2_POOL_H
+
+#include <linux/videodev2.h>
+#include <stdbool.h>
+
+/*
+ * struct v4l2_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 by the pool
+ * @mem: Video data memory
+ */
+struct v4l2_video_buffer
+{
+	unsigned int index;
+	unsigned int size;
+	unsigned int bytesused;
+	struct timeval timestamp;
+	bool error;
+	bool allocated;
+	void *mem;
+};
+
+struct v4l2_buffers_pool
+{
+	unsigned int nbufs;
+	struct v4l2_video_buffer *buffers;
+};
+
+/*
+ * v4l2_buffers_pool_new - Create a new buffers pool
+ * @nbufs: Number of buffers in the pool
+ *
+ * Allocate a new buffers pool with space for @nbufs buffers. Memory for the
+ * buffers is not allocated.
+ */
+struct v4l2_buffers_pool *v4l2_buffers_pool_new(unsigned int nbufs);
+
+/*
+ * v4l2_buffers_pool_delete - Delete a buffers pool
+ * @pool: Buffers pool
+ *
+ * Delete a buffers pool and free buffers memory if it has been allocated by
+ * the pool.
+ */
+void v4l2_buffers_pool_delete(struct v4l2_buffers_pool *pool);
+
+/*
+ * v4l2_buffers_pool_alloc - Allocate memory for buffers in a pool
+ * @pool: Buffers pool
+ * @size: Buffer size
+ * @align: Buffer memory alignment in bytes
+ *
+ * Allocate @size bytes of memory for each buffer aligned to a multiple of
+ * @align bytes. The alignment must be a power of 2.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_buffers_pool_alloc(struct v4l2_buffers_pool *pool, size_t size,
+			    size_t align);
+
+#endif