/* 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;

  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 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);

G_END_DECLS

#endif /*__GST_V4L2_BUFFER_POOL_H__ */