Adds a sunxi-cedrus-drv-video libVA backend

This VA backend uses v4l2's Frame API proposal to interface with the "sunxi-cedrus" video driver on Allwinner SoC. Only a few parts of the code are really dependent on sunxi-cedrus and this VA backend could be reused for other v4l drivers using the Frame API.
2016-08-05 12:23:15 +02:00
commit e263c9542c
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+/*
+ * Copyright (c) 2016 Florent Revest, <florent.revest@free-electrons.com>
+ *               2007 Intel Corporation. All Rights Reserved.
+ *
+ * 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 _CONTEXT_H_
+#define _CONTEXT_H_
+
+#include <va/va_backend.h>
+
+#include "object_heap.h"
+
+/* We can't dynamically call VIDIOC_REQBUFS for every MPEG slice we create.
+ * Indeed, the queue might be busy processing a previous buffer, so we need to
+ * pre-allocate a set of buffers with a max size */
+#define INPUT_BUFFER_MAX_SIZE		131072
+#define INPUT_BUFFERS_NB		4
+
+#define CONTEXT(id) ((object_context_p) object_heap_lookup(&driver_data->context_heap, id))
+#define CONTEXT_ID_OFFSET		0x02000000
+
+struct object_context {
+	struct object_base base;
+	VAContextID context_id;
+	VAConfigID config_id;
+	VASurfaceID current_render_target;
+	int picture_width;
+	int picture_height;
+	int num_render_targets;
+	int flags;
+	VASurfaceID *render_targets;
+	uint32_t num_rendered_surfaces;
+};
+
+typedef struct object_context *object_context_p;
+
+VAStatus sunxi_cedrus_CreateContext(VADriverContextP ctx, VAConfigID config_id,
+		int picture_width, int picture_height, int flag,
+		VASurfaceID *render_targets, int num_render_targets,
+		VAContextID *context);
+
+VAStatus sunxi_cedrus_DestroyContext(VADriverContextP ctx, VAContextID context);
+
+#endif /* _CONTEXT_H_ */