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e87cd0a29a
These two elements (shmsink and shmsrc) communicate buffers using POSIX shared memory. They also communicate the caps. The source currently acts as a live source and ignores the timestamps coming from the sink. It also does not transfer the tags.
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
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/* GStreamer
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* Copyright (C) <2009> Collabora Ltd
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* @author: Olivier Crete <olivier.crete@collabora.co.uk
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* Copyright (C) <2009> Nokia Inc
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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_SHM_H__
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#define __GST_SHM_H__
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#include <gst/gst.h>
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#include <semaphore.h>
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G_BEGIN_DECLS
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#define GST_SHM_MAX_CAPS_LENGTH (1024)
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#define SHM_LOCK(shm) sem_wait (&(shm)->mutex);
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#define SHM_UNLOCK(shm) sem_post (&(shm)->mutex);
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#define GST_SHM_CAPS_BUFFER(shm) ((shm)->data)
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#define GST_SHM_BUFFER(shm) ((shm)->data+(shm)->caps_size)
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struct GstShmHeader
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{
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sem_t notification;
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sem_t mutex;
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guint caps_gen;
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guint buffer_gen;
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gint caps_size;
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gint buffer_size;
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guint flags;
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GstClockTime timestamp;
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GstClockTime duration;
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guint64 offset;
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guint64 offset_end;
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gboolean eos;
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gchar data[0];
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/*
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* gchar caps_buffer[caps_size];
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* gchar buffer[buffer_size];
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*/
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};
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G_END_DECLS
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#endif /* __GST_SHM_H__ */
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