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c701dcd16c
STREAMOFF set all v4l2buffers to DEQUEUE state. Then for CAPTURE we call QBUF on each buffer. For OUTPUT the buffers are just push back in the GstBufferPool base class 's queue. But the loop actually looks like the same. https://bugzilla.gnome.org/show_bug.cgi?id=720568
115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/* GStreamer
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*
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@indt.org.br>
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* 2009 Texas Instruments, Inc - http://www.ti.com/
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*
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* gstv4l2bufferpool.h V4L2 buffer pool class
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_V4L2_BUFFER_POOL_H__
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#define __GST_V4L2_BUFFER_POOL_H__
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#include <gst/gst.h>
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typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
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typedef struct _GstV4l2BufferPoolClass GstV4l2BufferPoolClass;
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typedef struct _GstV4l2Meta GstV4l2Meta;
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#include "gstv4l2object.h"
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GST_DEBUG_CATEGORY_EXTERN (v4l2buffer_debug);
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G_BEGIN_DECLS
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#define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
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#define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
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#define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
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#define GST_V4L2_BUFFER_POOL_CAST(obj) ((GstV4l2BufferPool*)(obj))
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struct _GstV4l2BufferPool
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{
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GstBufferPool parent;
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GstV4l2Object *obj; /* the v4l2 object */
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gint video_fd; /* a dup(2) of the v4l2object's video_fd */
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GstAllocator *allocator;
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GstAllocationParams params;
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guint size;
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gboolean add_videometa;
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gboolean can_alloc; /* if extra buffers can be allocated */
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guint num_buffers; /* number of buffers we use */
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guint num_allocated; /* number of buffers allocated by the driver */
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guint num_queued; /* number of buffers queued in the driver */
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guint copy_threshold; /* when our pool runs lower, start handing out copies */
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gboolean streaming;
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GstBuffer **buffers;
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};
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struct _GstV4l2BufferPoolClass
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{
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GstBufferPoolClass parent_class;
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};
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struct _GstV4l2Meta {
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GstMeta meta;
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/* number of v4l2 planes
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* In MPLANE and non MPLANE case it can be one so
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* it contains all yuv planes
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* In MPLANE mode it can be one per yuv plane.
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* For example, 2 for NV12 and 3 for I420
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*
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* In non MPLANE mode it's always equal to 1
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* In MPLANE mode it's equivalent to vbuffer.length
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*/
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guint n_planes;
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/* only useful in GST_V4L2_IO_MMAP case.
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* it contains address at which the mapping
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* was placed for each v4l2 plane */
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gpointer mem[GST_VIDEO_MAX_PLANES];
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/* plane info for multi-planar buffers */
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struct v4l2_plane vplanes[GST_VIDEO_MAX_PLANES];
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/* video buffer info */
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struct v4l2_buffer vbuffer;
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};
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GType gst_v4l2_meta_api_get_type (void);
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const GstMetaInfo * gst_v4l2_meta_get_info (void);
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#define GST_V4L2_META_GET(buf) ((GstV4l2Meta *)gst_buffer_get_meta(buf,gst_v4l2_meta_api_get_type()))
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#define GST_V4L2_META_ADD(buf) ((GstV4l2Meta *)gst_buffer_add_meta(buf,gst_v4l2_meta_get_info(),NULL))
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GType gst_v4l2_buffer_pool_get_type (void);
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GstBufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj, GstCaps *caps);
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GstFlowReturn gst_v4l2_buffer_pool_process (GstV4l2BufferPool * bpool, GstBuffer * buf);
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gboolean gst_v4l2_buffer_pool_flush (GstV4l2BufferPool * pool);
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G_END_DECLS
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#endif /*__GST_V4L2_BUFFER_POOL_H__ */
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