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/* GStreamer
*
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* 2006 Edgard Lima <edgard.lima@gmail.com>
* 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"
#include "gstv4l2allocator.h"
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))
/* This flow return is used to indicated that the last buffer of a
* drain or a resoltuion change has been found. This should normally
* only occure for mem-2-mem devices. */
#define GST_V4L2_FLOW_LAST_BUFFER GST_FLOW_CUSTOM_SUCCESS
/* This flow return is used to indicated that the returned buffer was marked
* with the error flag and had no payload. This error should be recovered by
* simply waiting for next buffer. */
#define GST_V4L2_FLOW_CORRUPTED_BUFFER GST_FLOW_CUSTOM_SUCCESS_1
struct _GstV4l2BufferPool
{
GstBufferPool parent;
GstV4l2Object *obj; /* the v4l2 object */
gint video_fd; /* a dup(2) of the v4l2object's video_fd */
GstPoll *poll; /* a poll for video_fd */
GstPollFD pollfd;
gboolean can_poll_device;
gboolean empty;
GCond empty_cond;
gboolean orphaned;
GstV4l2Allocator *vallocator;
GstAllocator *allocator;
GstAllocationParams params;
GstBufferPool *other_pool;
guint size;
GstVideoInfo caps_info; /* Default video information */
gboolean add_videometa; /* set if video meta should be added */
gboolean enable_copy_threshold; /* If copy_threshold should be set */
guint min_latency; /* number of buffers we will hold */
guint max_latency; /* number of buffers we can hold */
guint num_queued; /* number of buffers queued in the driver */
guint num_allocated; /* number of buffers allocated */
guint copy_threshold; /* when our pool runs lower, start handing out copies */
gboolean streaming;
gboolean flushing;
GstBuffer *buffers[VIDEO_MAX_FRAME];
/* signal handlers */
gulong group_released_handler;
/* Control to warn only once on buggy feild driver bug */
gboolean has_warned_on_buggy_field;
};
struct _GstV4l2BufferPoolClass
{
GstBufferPoolClass parent_class;
};
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);
void gst_v4l2_buffer_pool_set_other_pool (GstV4l2BufferPool * pool,
GstBufferPool * other_pool);
void gst_v4l2_buffer_pool_copy_at_threshold (GstV4l2BufferPool * pool,
gboolean copy);
gboolean gst_v4l2_buffer_pool_flush (GstBufferPool *pool);
gboolean gst_v4l2_buffer_pool_orphan (GstBufferPool ** pool);
G_END_DECLS
#endif /*__GST_V4L2_BUFFER_POOL_H__ */
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