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/* GStreamer
*
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* 2006 Edgard Lima <edgard.lima@indt.org.br>
* 2009 Texas Instruments, Inc - http://www.ti.com/
*
* gstv4l2bufferpool.h V4L2 buffer pool class
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_V4L2_BUFFER_POOL_H__
#define __GST_V4L2_BUFFER_POOL_H__
#include <gst/gst.h>
typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
typedef struct _GstV4l2BufferPoolClass GstV4l2BufferPoolClass;
typedef struct _GstV4l2Meta GstV4l2Meta;
#include "gstv4l2object.h"
GST_DEBUG_CATEGORY_EXTERN (v4l2buffer_debug);
G_BEGIN_DECLS
#define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
#define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
#define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
#define GST_V4L2_BUFFER_POOL_CAST(obj) ((GstV4l2BufferPool*)(obj))
struct _GstV4l2BufferPool
{
GstBufferPool parent;
GstV4l2Object *obj; /* the v4l2 object */
gint video_fd; /* a dup(2) of the v4l2object's video_fd */
GstAllocator *allocator;
GstAllocationParams params;
guint size;
gboolean add_videometa;
gboolean can_alloc; /* if extra buffers can be allocated */
guint num_buffers; /* number of buffers we use */
guint num_allocated; /* number of buffers allocated by the driver */
guint num_queued; /* number of buffers queued in the driver */
guint copy_threshold; /* when our pool runs lower, start handing out copies */
gboolean streaming;
GstBuffer **buffers;
};
struct _GstV4l2BufferPoolClass
{
GstBufferPoolClass parent_class;
};
struct _GstV4l2Meta {
GstMeta meta;
/* number of v4l2 planes
* In MPLANE and non MPLANE case it can be one so
* it contains all yuv planes
* In MPLANE mode it can be one per yuv plane.
* For example, 2 for NV12 and 3 for I420
*
* In non MPLANE mode it's always equal to 1
* In MPLANE mode it's equivalent to vbuffer.length
*/
guint n_planes;
/* only useful in GST_V4L2_IO_MMAP case.
* it contains address at which the mapping
* was placed for each v4l2 plane */
gpointer mem[GST_VIDEO_MAX_PLANES];
/* plane info for multi-planar buffers */
struct v4l2_plane vplanes[GST_VIDEO_MAX_PLANES];
/* video buffer info */
struct v4l2_buffer vbuffer;
};
GType gst_v4l2_meta_api_get_type (void);
const GstMetaInfo * gst_v4l2_meta_get_info (void);
#define GST_V4L2_META_GET(buf) ((GstV4l2Meta *)gst_buffer_get_meta(buf,gst_v4l2_meta_api_get_type()))
#define GST_V4L2_META_ADD(buf) ((GstV4l2Meta *)gst_buffer_add_meta(buf,gst_v4l2_meta_get_info(),NULL))
GType gst_v4l2_buffer_pool_get_type (void);
GstBufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj, GstCaps *caps);
GstFlowReturn gst_v4l2_buffer_pool_process (GstV4l2BufferPool * bpool, GstBuffer * buf);
gboolean gst_v4l2_buffer_pool_flush (GstV4l2BufferPool * pool);
G_END_DECLS
#endif /*__GST_V4L2_BUFFER_POOL_H__ */
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