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4cd9255f0a
Make sure we always call munmap() with the same size we called mmap() with before. Current v4l2src uses the same structure for VIDIOC_QUERYBUF, VIDIOC_QBUF and v4l2_munmap calls. The problem is that the video buffer size (length) may vary for compressed or emulated bufs. VIDIOC_QBUF will change it if we pass the pointer of a v4l2_buffer. This is why we should avoid using same variable for mmap and video buffers. https://bugzilla.gnome.org/show_bug.cgi?id=671126
95 lines
2.9 KiB
C
95 lines
2.9 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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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//#include "v4l2_calls.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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guint size;
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guint min_buffers;
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guint max_buffers;
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guint prefix;
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guint align;
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gboolean add_videometa;
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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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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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gpointer mem;
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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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G_END_DECLS
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#endif /*__GST_V4L2_BUFFER_POOL_H__ */
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