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51a2c694ad
This is achieved by adding an extra reference on the buffers, which does not allow them to return to the pool. When they are released, this reference is dropped. The rest complexity of this patch (hash table, mutex, flag, explicit release calls) merely exists to allow a safe, guaranteed and deadlock-free destruction sequence. See the added comment on gstwaylandsink.c for details.
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/* GStreamer Wayland buffer pool
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* Copyright (C) 2012 Intel Corporation
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* Copyright (C) 2012 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
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* Copyright (C) 2014 Collabora Ltd.
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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_WAYLAND_BUFFER_POOL_H__
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#define __GST_WAYLAND_BUFFER_POOL_H__
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#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include "wldisplay.h"
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G_BEGIN_DECLS
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#define GST_TYPE_WAYLAND_BUFFER_POOL (gst_wayland_buffer_pool_get_type())
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#define GST_IS_WAYLAND_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_WAYLAND_BUFFER_POOL))
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#define GST_WAYLAND_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_WAYLAND_BUFFER_POOL, GstWaylandBufferPool))
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#define GST_WAYLAND_BUFFER_POOL_CAST(obj) ((GstWaylandBufferPool*)(obj))
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typedef struct _GstWaylandBufferPool GstWaylandBufferPool;
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typedef struct _GstWaylandBufferPoolClass GstWaylandBufferPoolClass;
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/* buffer meta */
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typedef struct _GstWlMeta GstWlMeta;
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GType gst_wl_meta_api_get_type (void);
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#define GST_WL_META_API_TYPE (gst_wl_meta_api_get_type())
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const GstMetaInfo * gst_wl_meta_get_info (void);
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#define GST_WL_META_INFO (gst_wl_meta_get_info())
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#define gst_buffer_get_wl_meta(b) ((GstWlMeta*)gst_buffer_get_meta((b),GST_WL_META_API_TYPE))
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struct _GstWlMeta {
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GstMeta meta;
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GstWaylandBufferPool *pool;
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struct wl_buffer *wbuffer;
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gboolean used_by_compositor;
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};
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/* buffer pool */
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struct _GstWaylandBufferPool
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{
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GstBufferPool bufferpool;
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GstWlDisplay *display;
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/* external configuration */
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GstVideoInfo info;
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/* allocation data */
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struct wl_shm_pool *wl_pool;
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size_t size;
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size_t used;
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void *data;
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GMutex buffers_map_mutex;
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GHashTable *buffers_map;
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};
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struct _GstWaylandBufferPoolClass
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{
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GstBufferPoolClass parent_class;
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};
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GType gst_wayland_buffer_pool_get_type (void);
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GstBufferPool *gst_wayland_buffer_pool_new (GstWlDisplay * display);
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void gst_wayland_compositor_acquire_buffer (GstWaylandBufferPool * self,
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GstBuffer * buffer);
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void gst_wayland_compositor_release_all_buffers (GstWaylandBufferPool * self);
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G_END_DECLS
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#endif /*__GST_WAYLAND_BUFFER_POOL_H__*/
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