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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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936b2fdfbc
Implement a new memory type wrapping CVPixelBuffer.
There are two immediate advantages:
a) Make the GstMemory itself retain the CVPixelBuffer. Previously,
the containing GstBuffer was solely responsible for the lifetime of
the backing CVPixelBuffer.
With this change, we remove the GST_MEMORY_FLAG_NO_SHARE so that
GstMemory objects be referenced by multiple GstBuffers (doing away
with the need to copy.)
b) Delay locking CVPixelBuffer into CPU memory until it's actually
mapped -- possibly never.
The CVPixelBuffer object is shared among references, shares and
(in planar formats) planes, so a wrapper GstAppleCoreVideoPixelBuffer
structure was introduced to manage locking.
https://bugzilla.gnome.org/show_bug.cgi?id=747216
106 lines
2.8 KiB
Objective-C
106 lines
2.8 KiB
Objective-C
/*
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* Copyright (C) 2009-2010 Ole André Vadla Ravnås <oleavr@soundrop.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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <Foundation/Foundation.h>
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#include "corevideomemory.h"
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#ifdef HAVE_IOS
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#include "iosassetsrc.h"
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#else
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#include "qtkitvideosrc.h"
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#endif
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#ifdef HAVE_AVFOUNDATION
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#include "avfvideosrc.h"
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#include "avfassetsrc.h"
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#include "avsamplevideosink.h"
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#endif
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#ifdef HAVE_VIDEOTOOLBOX
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#include "vtdec.h"
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#endif
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#ifndef HAVE_IOS
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#define AV_RANK GST_RANK_SECONDARY
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#else
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#define AV_RANK GST_RANK_PRIMARY
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#endif
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#include "atdec.h"
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#ifdef HAVE_VIDEOTOOLBOX
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void gst_vtenc_register_elements (GstPlugin * plugin);
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#endif
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#ifndef HAVE_IOS
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static void
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enable_mt_mode (void)
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{
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NSThread * th = [[NSThread alloc] init];
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[th start];
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[th release];
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g_assert ([NSThread isMultiThreaded]);
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}
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#endif
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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gboolean res = TRUE;
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gst_apple_core_video_memory_init ();
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#ifdef HAVE_IOS
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res &= gst_element_register (plugin, "iosassetsrc", GST_RANK_SECONDARY,
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GST_TYPE_IOS_ASSET_SRC);
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#else
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enable_mt_mode ();
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res = gst_element_register (plugin, "qtkitvideosrc", GST_RANK_SECONDARY,
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GST_TYPE_QTKIT_VIDEO_SRC);
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#endif
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#ifdef HAVE_AVFOUNDATION
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res &= gst_element_register (plugin, "avfvideosrc", AV_RANK,
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GST_TYPE_AVF_VIDEO_SRC);
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res &= gst_element_register (plugin, "avfassetsrc", AV_RANK,
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GST_TYPE_AVF_ASSET_SRC);
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res &= gst_element_register (plugin, "avsamplebufferlayersink",
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GST_RANK_NONE, GST_TYPE_AV_SAMPLE_VIDEO_SINK);
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#endif
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res &= gst_element_register (plugin, "atdec", GST_RANK_MARGINAL, GST_TYPE_ATDEC);
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#ifdef HAVE_VIDEOTOOLBOX
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/* Check if the framework actually exists at runtime */
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if (&VTCompressionSessionCreate != NULL) {
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gst_vtdec_register_elements (plugin);
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gst_vtenc_register_elements (plugin);
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}
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#endif
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return res;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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applemedia,
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"Elements for capture and codec access on Apple OS X and iOS",
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plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")
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