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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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b4654f537f
As per Apple's docs, this may improve performance by avoiding redundant invalidations of existing caches of the buffer contents.
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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* Copyright (C) 2010 Ole André Vadla Ravnås <oravnas@cisco.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "corevideobuffer.h"
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G_DEFINE_TYPE (GstCoreVideoBuffer, gst_core_video_buffer, GST_TYPE_BUFFER);
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static void
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gst_core_video_buffer_init (GstCoreVideoBuffer * self)
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{
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GST_BUFFER_FLAG_SET (self, GST_BUFFER_FLAG_READONLY);
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}
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static void
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gst_core_video_buffer_finalize (GstMiniObject * mini_object)
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{
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GstCoreVideoBuffer *self = GST_CORE_VIDEO_BUFFER_CAST (mini_object);
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GstCVApi *cv = self->ctx->cv;
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if (self->pixbuf != NULL) {
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cv->CVPixelBufferUnlockBaseAddress (self->pixbuf,
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kCVPixelBufferLock_ReadOnly);
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}
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cv->CVBufferRelease (self->cvbuf);
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g_object_unref (self->ctx);
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GST_MINI_OBJECT_CLASS (gst_core_video_buffer_parent_class)->finalize
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(mini_object);
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}
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GstBuffer *
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gst_core_video_buffer_new (GstCoreMediaCtx * ctx, CVBufferRef cvbuf)
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{
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GstCVApi *cv = ctx->cv;
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void *data;
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size_t size;
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CVPixelBufferRef pixbuf = NULL;
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GstCoreVideoBuffer *buf;
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if (CFGetTypeID (cvbuf) == cv->CVPixelBufferGetTypeID ()) {
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pixbuf = (CVPixelBufferRef) cvbuf;
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if (cv->CVPixelBufferLockBaseAddress (pixbuf,
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kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
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goto error;
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}
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data = cv->CVPixelBufferGetBaseAddress (pixbuf);
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size = cv->CVPixelBufferGetBytesPerRow (pixbuf) *
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cv->CVPixelBufferGetHeight (pixbuf);
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} else {
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/* TODO: Do we need to handle other buffer types? */
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goto error;
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}
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buf = GST_CORE_VIDEO_BUFFER_CAST (gst_mini_object_new
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(GST_TYPE_CORE_VIDEO_BUFFER));
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buf->ctx = g_object_ref (ctx);
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buf->cvbuf = cv->CVBufferRetain (cvbuf);
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buf->pixbuf = pixbuf;
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GST_BUFFER_DATA (buf) = data;
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GST_BUFFER_SIZE (buf) = size;
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return GST_BUFFER_CAST (buf);
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error:
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return NULL;
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}
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static void
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gst_core_video_buffer_class_init (GstCoreVideoBufferClass * klass)
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{
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GstMiniObjectClass *miniobject_class = GST_MINI_OBJECT_CLASS (klass);
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miniobject_class->finalize = gst_core_video_buffer_finalize;
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}
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