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0948ce0478
Recent kernels allow REQBUFS(0) on a queue that still has buffers in use (mmapped or exported via dmabuf), orphaning all buffers on the queue. Orphaning the allocator causes it to release all buffers with REQBUFS(0), even if they are still in use. An orphaned allocator can only be stopped. It can not be restarted or create new buffers.
164 lines
6.4 KiB
C
164 lines
6.4 KiB
C
/*
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* Copyright (C) 2014 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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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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*/
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#ifndef __GST_V4L2_ALLOCATOR_H__
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#define __GST_V4L2_ALLOCATOR_H__
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#include "ext/videodev2.h"
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#include <gst/gst.h>
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#include <gst/gstatomicqueue.h>
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G_BEGIN_DECLS
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#define GST_TYPE_V4L2_ALLOCATOR (gst_v4l2_allocator_get_type())
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#define GST_IS_V4L2_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_ALLOCATOR))
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#define GST_IS_V4L2_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_V4L2_ALLOCATOR))
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#define GST_V4L2_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2_ALLOCATOR, GstV4l2AllocatorClass))
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#define GST_V4L2_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_ALLOCATOR, GstV4l2Allocator))
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#define GST_V4L2_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_V4L2_ALLOCATOR, GstV4l2AllocatorClass))
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#define GST_V4L2_ALLOCATOR_CAST(obj) ((GstV4l2Allocator *)(obj))
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#define GST_V4L2_ALLOCATOR_CAN_REQUEST(obj,type) \
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(GST_OBJECT_FLAG_IS_SET (obj, GST_V4L2_ALLOCATOR_FLAG_ ## type ## _REQBUFS))
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#define GST_V4L2_ALLOCATOR_CAN_ALLOCATE(obj,type) \
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(GST_OBJECT_FLAG_IS_SET (obj, GST_V4L2_ALLOCATOR_FLAG_ ## type ## _CREATE_BUFS))
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#define GST_V4L2_ALLOCATOR_CAN_ORPHAN_BUFS(obj) \
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(GST_OBJECT_FLAG_IS_SET (obj, GST_V4L2_ALLOCATOR_FLAG_SUPPORTS_ORPHANED_BUFS))
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#define GST_V4L2_ALLOCATOR_IS_ORPHANED(obj) \
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(GST_OBJECT_FLAG_IS_SET (obj, GST_V4L2_ALLOCATOR_FLAG_ORPHANED))
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#define GST_V4L2_MEMORY_QUARK gst_v4l2_memory_quark ()
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typedef struct _GstV4l2Allocator GstV4l2Allocator;
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typedef struct _GstV4l2AllocatorClass GstV4l2AllocatorClass;
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typedef struct _GstV4l2MemoryGroup GstV4l2MemoryGroup;
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typedef struct _GstV4l2Memory GstV4l2Memory;
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typedef enum _GstV4l2Capabilities GstV4l2Capabilities;
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typedef enum _GstV4l2Return GstV4l2Return;
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enum _GstV4l2AllocatorFlags
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{
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GST_V4L2_ALLOCATOR_FLAG_MMAP_REQBUFS = (GST_ALLOCATOR_FLAG_LAST << 0),
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GST_V4L2_ALLOCATOR_FLAG_MMAP_CREATE_BUFS = (GST_ALLOCATOR_FLAG_LAST << 1),
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GST_V4L2_ALLOCATOR_FLAG_USERPTR_REQBUFS = (GST_ALLOCATOR_FLAG_LAST << 2),
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GST_V4L2_ALLOCATOR_FLAG_USERPTR_CREATE_BUFS = (GST_ALLOCATOR_FLAG_LAST << 3),
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GST_V4L2_ALLOCATOR_FLAG_DMABUF_REQBUFS = (GST_ALLOCATOR_FLAG_LAST << 4),
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GST_V4L2_ALLOCATOR_FLAG_DMABUF_CREATE_BUFS = (GST_ALLOCATOR_FLAG_LAST << 5),
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GST_V4L2_ALLOCATOR_FLAG_SUPPORTS_ORPHANED_BUFS = (GST_ALLOCATOR_FLAG_LAST << 6),
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GST_V4L2_ALLOCATOR_FLAG_ORPHANED = (GST_ALLOCATOR_FLAG_LAST << 7),
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};
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enum _GstV4l2Return
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{
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GST_V4L2_OK = 0,
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GST_V4L2_ERROR = -1,
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GST_V4L2_BUSY = -2
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};
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struct _GstV4l2Memory
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{
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GstMemory mem;
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gint plane;
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GstV4l2MemoryGroup *group;
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gpointer data;
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gint dmafd;
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};
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struct _GstV4l2MemoryGroup
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{
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gint n_mem;
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GstMemory * mem[VIDEO_MAX_PLANES];
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gint mems_allocated;
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struct v4l2_buffer buffer;
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struct v4l2_plane planes[VIDEO_MAX_PLANES];
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};
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struct _GstV4l2Allocator
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{
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GstAllocator parent;
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GstV4l2Object *obj;
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guint32 count;
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guint32 memory;
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gboolean can_allocate;
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gboolean active;
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GstV4l2MemoryGroup * groups[VIDEO_MAX_FRAME];
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GstAtomicQueue *free_queue;
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GstAtomicQueue *pending_queue;
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};
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struct _GstV4l2AllocatorClass {
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GstAllocatorClass parent_class;
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};
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GType gst_v4l2_allocator_get_type(void);
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gboolean gst_is_v4l2_memory (GstMemory * mem);
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GQuark gst_v4l2_memory_quark (void);
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gboolean gst_v4l2_allocator_is_active (GstV4l2Allocator * allocator);
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guint gst_v4l2_allocator_get_size (GstV4l2Allocator * allocator);
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GstV4l2Allocator* gst_v4l2_allocator_new (GstObject *parent, GstV4l2Object * obj);
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guint gst_v4l2_allocator_start (GstV4l2Allocator * allocator,
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guint32 count, guint32 memory);
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GstV4l2Return gst_v4l2_allocator_stop (GstV4l2Allocator * allocator);
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gboolean gst_v4l2_allocator_orphan (GstV4l2Allocator * allocator);
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GstV4l2MemoryGroup* gst_v4l2_allocator_alloc_mmap (GstV4l2Allocator * allocator);
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GstV4l2MemoryGroup* gst_v4l2_allocator_alloc_dmabuf (GstV4l2Allocator * allocator,
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GstAllocator * dmabuf_allocator);
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GstV4l2MemoryGroup * gst_v4l2_allocator_alloc_dmabufin (GstV4l2Allocator * allocator);
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GstV4l2MemoryGroup * gst_v4l2_allocator_alloc_userptr (GstV4l2Allocator * allocator);
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gboolean gst_v4l2_allocator_import_dmabuf (GstV4l2Allocator * allocator,
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GstV4l2MemoryGroup *group,
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gint n_mem, GstMemory ** dma_mem);
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gboolean gst_v4l2_allocator_import_userptr (GstV4l2Allocator * allocator,
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GstV4l2MemoryGroup *group,
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gsize img_size, int n_planes,
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gpointer * data, gsize * size);
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void gst_v4l2_allocator_flush (GstV4l2Allocator * allocator);
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gboolean gst_v4l2_allocator_qbuf (GstV4l2Allocator * allocator,
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GstV4l2MemoryGroup * group);
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GstFlowReturn gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator,
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GstV4l2MemoryGroup ** group);
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void gst_v4l2_allocator_reset_group (GstV4l2Allocator * allocator,
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GstV4l2MemoryGroup * group);
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G_END_DECLS
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#endif /* __GST_V4L2_ALLOCATOR_H__ */
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