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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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97bb1edf6c
Public frameworks don't need to build the API dynamically, we instead use the framework directly. The exception is for VideoToolbox which went public in the 10.8 SDK, but it's still private in older version of the SDK and iOS. This allow building the plugin against SDK's where it's not a public framework.
135 lines
3.9 KiB
C
135 lines
3.9 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,
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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,
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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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/* FIXME: don't hardcode NV12 */
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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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GST_VIDEO_FORMAT_NV12, 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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size = CVPixelBufferGetBytesPerRow (pixbuf) * 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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GST_VIDEO_FORMAT_NV12, 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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