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783e58fc48
One big restriction of the OMX buffer pool has always been that the GstMemory objects were flagged with NO_SHARE. This was because the buffer pool needed to be sure that when a buffer returned to the pool, it would be safe to release the OMX buffer back to OpenMAX. With this change, this is no longer a restriction. What this commit introduces is a new allocator that allows us to track the GstMemory objects independently. Now, when a buffer returns to the pool, it is not necessary for the memory to be released as well. We simply track the memory's ref count in the allocator and we return the OMX buffer back when the memory's ref count drops to 0. The reason for doing this is to allow implementing zero-copy transfers in situations where we may need to copy or map a certain region of the buffer. For instance, omxh264enc ! h264parse should be possible to be zero-copy by using an OMX buffer pool between them.
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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* Author: Christian König <christian.koenig@amd.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 Lesser General Public
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* License as published by the Free Software Foundation
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* version 2.1 of the License.
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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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __GST_OMX_BUFFER_POOL_H__
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#define __GST_OMX_BUFFER_POOL_H__
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gst/video/gstvideometa.h>
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#include <gst/video/gstvideopool.h>
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#include "gstomx.h"
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#include "gstomxallocator.h"
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G_BEGIN_DECLS
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#define GST_TYPE_OMX_BUFFER_POOL \
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(gst_omx_buffer_pool_get_type())
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#define GST_OMX_BUFFER_POOL(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OMX_BUFFER_POOL,GstOMXBufferPool))
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#define GST_IS_OMX_BUFFER_POOL(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OMX_BUFFER_POOL))
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typedef struct _GstOMXBufferPool GstOMXBufferPool;
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typedef struct _GstOMXBufferPoolClass GstOMXBufferPoolClass;
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typedef enum {
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GST_OMX_BUFFER_MODE_SYSTEM_MEMORY,
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GST_OMX_BUFFER_MODE_DMABUF,
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} GstOMXBufferMode;
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struct _GstOMXBufferPool
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{
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GstVideoBufferPool parent;
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GstElement *element;
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GstCaps *caps;
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gboolean add_videometa;
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gboolean need_copy;
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GstVideoInfo video_info;
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/* Owned by element, element has to stop this pool before
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* it destroys component or port */
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GstOMXComponent *component;
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GstOMXPort *port;
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/* For handling OpenMAX allocated memory */
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GstOMXAllocator *allocator;
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/* Set from outside this pool */
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/* TRUE if the pool is not used anymore */
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gboolean deactivated;
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/* For populating the pool from another one */
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GstBufferPool *other_pool;
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GPtrArray *buffers;
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/* Used during acquire for output ports to
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* specify which buffer has to be retrieved
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* and during alloc, which buffer has to be
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* wrapped
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*/
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gint current_buffer_index;
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/* The type of buffers produced by the decoder */
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GstOMXBufferMode output_mode;
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};
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struct _GstOMXBufferPoolClass
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{
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GstVideoBufferPoolClass parent_class;
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};
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GType gst_omx_buffer_pool_get_type (void);
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GstBufferPool *gst_omx_buffer_pool_new (GstElement * element, GstOMXComponent * component, GstOMXPort * port, GstOMXBufferMode output_mode);
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G_END_DECLS
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#endif /* __GST_OMX_BUFFER_POOL_H__ */
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