mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/*
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* Copyright (C) 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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#include "corevideobuffer.h"
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static void
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gst_core_video_meta_free (GstCoreVideoMeta * meta, GstBuffer * buf)
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{
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if (meta->pixbuf != NULL) {
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CVPixelBufferUnlockBaseAddress (meta->pixbuf, kCVPixelBufferLock_ReadOnly);
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}
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CVBufferRelease (meta->cvbuf);
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}
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GType
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gst_core_video_meta_api_get_type (void)
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{
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static volatile GType type;
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static const gchar *tags[] = { "memory", NULL };
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstCoreVideoMetaAPI", tags);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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static const GstMetaInfo *
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gst_core_video_meta_get_info (void)
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{
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static const GstMetaInfo *core_video_meta_info = NULL;
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if (g_once_init_enter (&core_video_meta_info)) {
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const GstMetaInfo *meta = gst_meta_register (GST_CORE_VIDEO_META_API_TYPE,
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"GstCoreVideoMeta", sizeof (GstCoreVideoMeta),
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(GstMetaInitFunction) NULL,
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(GstMetaFreeFunction) gst_core_video_meta_free,
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(GstMetaTransformFunction) NULL);
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g_once_init_leave (&core_video_meta_info, meta);
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}
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return core_video_meta_info;
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}
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GstBuffer *
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gst_core_video_buffer_new (CVBufferRef cvbuf, GstVideoInfo * vinfo)
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{
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void *data;
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size_t size;
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CVPixelBufferRef pixbuf = NULL;
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GstBuffer *buf;
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GstCoreVideoMeta *meta;
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guint width, height, n_planes, i;
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gsize offset[GST_VIDEO_MAX_PLANES];
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gint stride[GST_VIDEO_MAX_PLANES];
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if (CFGetTypeID (cvbuf) != CVPixelBufferGetTypeID ())
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/* TODO: Do we need to handle other buffer types? */
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goto error;
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pixbuf = (CVPixelBufferRef) cvbuf;
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if (CVPixelBufferLockBaseAddress (pixbuf,
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kCVPixelBufferLock_ReadOnly) != kCVReturnSuccess) {
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goto error;
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}
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buf = gst_buffer_new ();
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/* add the corevideo meta to free the underlying corevideo buffer */
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meta = (GstCoreVideoMeta *) gst_buffer_add_meta (buf,
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gst_core_video_meta_get_info (), NULL);
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meta->cvbuf = CVBufferRetain (cvbuf);
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meta->pixbuf = pixbuf;
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/* set stride, offset and size */
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memset (&offset, 0, sizeof (offset));
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memset (&stride, 0, sizeof (stride));
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data = CVPixelBufferGetBaseAddress (pixbuf);
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height = CVPixelBufferGetHeight (pixbuf);
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if (CVPixelBufferIsPlanar (pixbuf)) {
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GstVideoInfo tmp_vinfo;
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n_planes = CVPixelBufferGetPlaneCount (pixbuf);
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for (i = 0; i < n_planes; ++i)
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stride[i] = CVPixelBufferGetBytesPerRowOfPlane (pixbuf, i);
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gst_video_info_init (&tmp_vinfo);
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gst_video_info_set_format (&tmp_vinfo,
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vinfo->finfo->format, stride[0], height);
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offset[1] = tmp_vinfo.offset[1];
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size = tmp_vinfo.size;
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} else {
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n_planes = 1;
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stride[0] = CVPixelBufferGetBytesPerRow (pixbuf);
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size = stride[0] * height;
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}
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gst_buffer_append_memory (buf,
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gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, data,
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size, 0, size, NULL, NULL));
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if (vinfo) {
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GstVideoMeta *video_meta;
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width = vinfo->width;
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video_meta =
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gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
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vinfo->finfo->format, width, height, n_planes, offset, stride);
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}
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return buf;
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error:
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return NULL;
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}
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