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722 lines
20 KiB
C
722 lines
20 KiB
C
/* GStreamer
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* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.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 "gstvideometa.h"
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#include <string.h>
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static gboolean
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gst_video_meta_transform (GstBuffer * dest, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstVideoMeta *dmeta, *smeta;
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guint i;
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smeta = (GstVideoMeta *) meta;
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if (GST_META_TRANSFORM_IS_COPY (type)) {
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GstMetaTransformCopy *copy = data;
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if (!copy->region) {
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/* only copy if the complete data is copied as well */
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dmeta =
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(GstVideoMeta *) gst_buffer_add_meta (dest, GST_VIDEO_META_INFO,
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NULL);
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if (!dmeta)
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return FALSE;
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dmeta->buffer = dest;
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GST_DEBUG ("copy video metadata");
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dmeta->flags = smeta->flags;
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dmeta->format = smeta->format;
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dmeta->id = smeta->id;
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dmeta->width = smeta->width;
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dmeta->height = smeta->height;
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dmeta->n_planes = smeta->n_planes;
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for (i = 0; i < dmeta->n_planes; i++) {
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dmeta->offset[i] = smeta->offset[i];
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dmeta->stride[i] = smeta->stride[i];
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}
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dmeta->map = smeta->map;
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dmeta->unmap = smeta->unmap;
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}
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}
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return TRUE;
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}
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GType
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gst_video_meta_api_get_type (void)
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{
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static volatile GType type = 0;
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static const gchar *tags[] =
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{ GST_META_TAG_VIDEO_STR, GST_META_TAG_MEMORY_STR,
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GST_META_TAG_VIDEO_COLORSPACE_STR,
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GST_META_TAG_VIDEO_SIZE_STR, NULL
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};
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstVideoMetaAPI", 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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/* video metadata */
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const GstMetaInfo *
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gst_video_meta_get_info (void)
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{
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static const GstMetaInfo *video_meta_info = NULL;
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if (g_once_init_enter (&video_meta_info)) {
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const GstMetaInfo *meta =
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gst_meta_register (GST_VIDEO_META_API_TYPE, "GstVideoMeta",
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sizeof (GstVideoMeta), (GstMetaInitFunction) NULL,
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(GstMetaFreeFunction) NULL, gst_video_meta_transform);
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g_once_init_leave (&video_meta_info, meta);
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}
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return video_meta_info;
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}
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/**
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* gst_buffer_get_video_meta_id:
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* @buffer: a #GstBuffer
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* @id: a metadata id
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*
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* Find the #GstVideoMeta on @buffer with the given @id.
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*
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* Buffers can contain multiple #GstVideoMeta metadata items when dealing with
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* multiview buffers.
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*
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* Returns: the #GstVideoMeta with @id or %NULL when there is no such metadata
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* on @buffer.
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*/
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GstVideoMeta *
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gst_buffer_get_video_meta_id (GstBuffer * buffer, gint id)
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{
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gpointer state = NULL;
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GstMeta *meta;
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const GstMetaInfo *info = GST_VIDEO_META_INFO;
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while ((meta = gst_buffer_iterate_meta (buffer, &state))) {
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if (meta->info->api == info->api) {
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GstVideoMeta *vmeta = (GstVideoMeta *) meta;
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if (vmeta->id == id)
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return vmeta;
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}
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}
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return NULL;
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}
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static gboolean
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default_map (GstVideoMeta * meta, guint plane, GstMapInfo * info,
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gpointer * data, gint * stride, GstMapFlags flags)
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{
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guint idx, length;
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gsize offset, skip;
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GstBuffer *buffer = meta->buffer;
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offset = meta->offset[plane];
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/* find the memory block for this plane, this is the memory block containing
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* the plane offset. FIXME use plane size */
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if (!gst_buffer_find_memory (buffer, offset, 1, &idx, &length, &skip))
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goto no_memory;
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if (!gst_buffer_map_range (buffer, idx, length, info, flags))
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goto cannot_map;
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*stride = meta->stride[plane];
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*data = (guint8 *) info->data + skip;
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return TRUE;
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/* ERRORS */
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no_memory:
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{
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GST_DEBUG ("plane %u, no memory at offset %" G_GSIZE_FORMAT, plane, offset);
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return FALSE;
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}
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cannot_map:
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{
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GST_DEBUG ("cannot map memory range %u-%u", idx, length);
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return FALSE;
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}
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}
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static gboolean
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default_unmap (GstVideoMeta * meta, guint plane, GstMapInfo * info)
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{
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GstBuffer *buffer = meta->buffer;
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gst_buffer_unmap (buffer, info);
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return TRUE;
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}
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/**
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* gst_buffer_add_video_meta:
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* @buffer: a #GstBuffer
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* @flags: #GstVideoFrameFlags
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* @format: a #GstVideoFormat
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* @width: the width
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* @height: the height
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*
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* Attaches GstVideoMeta metadata to @buffer with the given parameters and the
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* default offsets and strides for @format and @width x @height.
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*
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* This function calculates the default offsets and strides and then calls
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* gst_buffer_add_video_meta_full() with them.
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*
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* Returns: the #GstVideoMeta on @buffer.
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*/
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GstVideoMeta *
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gst_buffer_add_video_meta (GstBuffer * buffer,
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GstVideoFrameFlags flags, GstVideoFormat format, guint width, guint height)
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{
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GstVideoMeta *meta;
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GstVideoInfo info;
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gst_video_info_set_format (&info, format, width, height);
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meta =
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gst_buffer_add_video_meta_full (buffer, flags, format, width,
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height, info.finfo->n_planes, info.offset, info.stride);
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return meta;
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}
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/**
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* gst_buffer_add_video_meta_full:
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* @buffer: a #GstBuffer
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* @flags: #GstVideoFrameFlags
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* @format: a #GstVideoFormat
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* @width: the width
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* @height: the height
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* @n_planes: number of planes
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* @offset: offset of each plane
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* @stride: stride of each plane
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*
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* Attaches GstVideoMeta metadata to @buffer with the given parameters.
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*
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* Returns: the #GstVideoMeta on @buffer.
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*/
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GstVideoMeta *
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gst_buffer_add_video_meta_full (GstBuffer * buffer,
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GstVideoFrameFlags flags, GstVideoFormat format, guint width,
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guint height, guint n_planes, gsize offset[GST_VIDEO_MAX_PLANES],
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gint stride[GST_VIDEO_MAX_PLANES])
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{
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GstVideoMeta *meta;
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guint i;
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meta =
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(GstVideoMeta *) gst_buffer_add_meta (buffer, GST_VIDEO_META_INFO, NULL);
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if (!meta)
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return NULL;
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meta->flags = flags;
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meta->format = format;
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meta->id = 0;
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meta->width = width;
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meta->height = height;
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meta->buffer = buffer;
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meta->n_planes = n_planes;
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for (i = 0; i < n_planes; i++) {
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meta->offset[i] = offset[i];
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meta->stride[i] = stride[i];
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GST_LOG ("plane %d, offset %" G_GSIZE_FORMAT ", stride %d", i, offset[i],
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stride[i]);
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}
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meta->map = default_map;
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meta->unmap = default_unmap;
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return meta;
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}
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/**
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* gst_video_meta_map:
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* @meta: a #GstVideoMeta
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* @plane: a plane
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* @info: a #GstMapInfo
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* @data: the data of @plane
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* @stride: the stride of @plane
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* @flags: @GstMapFlags
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*
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* Map the video plane with index @plane in @meta and return a pointer to the
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* first byte of the plane and the stride of the plane.
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*
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* Returns: TRUE if the map operation was successful.
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*/
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gboolean
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gst_video_meta_map (GstVideoMeta * meta, guint plane, GstMapInfo * info,
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gpointer * data, gint * stride, GstMapFlags flags)
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{
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g_return_val_if_fail (meta != NULL, FALSE);
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g_return_val_if_fail (meta->map != NULL, FALSE);
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g_return_val_if_fail (plane < meta->n_planes, FALSE);
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g_return_val_if_fail (info != NULL, FALSE);
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (stride != NULL, FALSE);
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g_return_val_if_fail (meta->buffer != NULL, FALSE);
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g_return_val_if_fail (!(flags & GST_MAP_WRITE)
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|| gst_buffer_is_writable (meta->buffer), FALSE);
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return meta->map (meta, plane, info, data, stride, flags);
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}
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/**
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* gst_video_meta_unmap:
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* @meta: a #GstVideoMeta
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* @plane: a plane
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* @info: a #GstMapInfo
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*
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* Unmap a previously mapped plane with gst_video_meta_map().
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*
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* Returns: TRUE if the memory was successfully unmapped.
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*/
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gboolean
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gst_video_meta_unmap (GstVideoMeta * meta, guint plane, GstMapInfo * info)
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{
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g_return_val_if_fail (meta != NULL, FALSE);
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g_return_val_if_fail (meta->unmap != NULL, FALSE);
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g_return_val_if_fail (plane < meta->n_planes, FALSE);
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g_return_val_if_fail (info != NULL, FALSE);
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return meta->unmap (meta, plane, info);
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}
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static gboolean
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gst_video_crop_meta_transform (GstBuffer * dest, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstVideoCropMeta *dmeta, *smeta;
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if (GST_META_TRANSFORM_IS_COPY (type)) {
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smeta = (GstVideoCropMeta *) meta;
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dmeta = gst_buffer_add_video_crop_meta (dest);
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GST_DEBUG ("copy crop metadata");
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dmeta->x = smeta->x;
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dmeta->y = smeta->y;
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dmeta->width = smeta->width;
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dmeta->height = smeta->height;
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} else if (GST_VIDEO_META_TRANSFORM_IS_SCALE (type)) {
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GstVideoMetaTransform *trans = data;
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gint ow, oh, nw, nh;
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smeta = (GstVideoCropMeta *) meta;
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dmeta = gst_buffer_add_video_crop_meta (dest);
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ow = GST_VIDEO_INFO_WIDTH (trans->in_info);
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nw = GST_VIDEO_INFO_WIDTH (trans->out_info);
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oh = GST_VIDEO_INFO_HEIGHT (trans->in_info);
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nh = GST_VIDEO_INFO_HEIGHT (trans->out_info);
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GST_DEBUG ("scaling crop metadata %dx%d -> %dx%d", ow, oh, nw, nh);
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dmeta->x = (smeta->x * nw) / ow;
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dmeta->y = (smeta->y * nh) / oh;
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dmeta->width = (smeta->width * nw) / ow;
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dmeta->height = (smeta->height * nh) / oh;
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GST_DEBUG ("crop offset %dx%d -> %dx%d", smeta->x, smeta->y, dmeta->x,
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dmeta->y);
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GST_DEBUG ("crop size %dx%d -> %dx%d", smeta->width, smeta->height,
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dmeta->width, dmeta->height);
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}
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return TRUE;
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}
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GType
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gst_video_crop_meta_api_get_type (void)
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{
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static volatile GType type = 0;
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static const gchar *tags[] =
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{ GST_META_TAG_VIDEO_STR, GST_META_TAG_VIDEO_SIZE_STR,
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GST_META_TAG_VIDEO_ORIENTATION_STR, NULL
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};
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstVideoCropMetaAPI", 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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const GstMetaInfo *
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gst_video_crop_meta_get_info (void)
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{
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static const GstMetaInfo *video_crop_meta_info = NULL;
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if (g_once_init_enter (&video_crop_meta_info)) {
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const GstMetaInfo *meta =
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gst_meta_register (GST_VIDEO_CROP_META_API_TYPE, "GstVideoCropMeta",
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sizeof (GstVideoCropMeta), (GstMetaInitFunction) NULL,
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(GstMetaFreeFunction) NULL, gst_video_crop_meta_transform);
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g_once_init_leave (&video_crop_meta_info, meta);
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}
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return video_crop_meta_info;
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}
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/**
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* gst_video_meta_transform_scale_get_quark:
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*
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* Get the #GQuark for the "gst-video-scale" metadata transform operation.
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*
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* Returns: a #GQuark
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*/
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GQuark
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gst_video_meta_transform_scale_get_quark (void)
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{
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static GQuark _value = 0;
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if (_value == 0) {
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_value = g_quark_from_static_string ("gst-video-scale");
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}
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return _value;
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}
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GType
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gst_video_gl_texture_upload_meta_api_get_type (void)
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{
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static volatile GType type = 0;
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static const gchar *tags[] =
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{ GST_META_TAG_VIDEO_STR, GST_META_TAG_MEMORY_STR, NULL };
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if (g_once_init_enter (&type)) {
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GType _type =
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gst_meta_api_type_register ("GstVideoGLTextureUploadMetaAPI", 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 void
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gst_video_gl_texture_upload_meta_free (GstMeta * meta, GstBuffer * buffer)
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{
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GstVideoGLTextureUploadMeta *vmeta = (GstVideoGLTextureUploadMeta *) meta;
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if (vmeta->user_data_free)
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vmeta->user_data_free (vmeta->user_data);
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}
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static gboolean
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gst_video_gl_texture_upload_meta_transform (GstBuffer * dest, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstVideoGLTextureUploadMeta *dmeta, *smeta;
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smeta = (GstVideoGLTextureUploadMeta *) meta;
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if (GST_META_TRANSFORM_IS_COPY (type)) {
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GstMetaTransformCopy *copy = data;
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if (!copy->region) {
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/* only copy if the complete data is copied as well */
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dmeta =
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(GstVideoGLTextureUploadMeta *) gst_buffer_add_meta (dest,
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GST_VIDEO_GL_TEXTURE_UPLOAD_META_INFO, NULL);
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if (!dmeta)
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return FALSE;
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dmeta->texture_orientation = smeta->texture_orientation;
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dmeta->n_textures = smeta->n_textures;
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memcpy (dmeta->texture_type, smeta->texture_type,
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sizeof (smeta->texture_type[0] * 4));
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dmeta->buffer = dest;
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dmeta->upload = smeta->upload;
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dmeta->user_data = smeta->user_data;
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dmeta->user_data_copy = smeta->user_data_copy;
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dmeta->user_data_free = smeta->user_data_free;
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if (dmeta->user_data_copy)
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dmeta->user_data = dmeta->user_data_copy (dmeta->user_data);
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}
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}
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return TRUE;
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}
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const GstMetaInfo *
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gst_video_gl_texture_upload_meta_get_info (void)
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{
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static const GstMetaInfo *info = NULL;
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if (g_once_init_enter (&info)) {
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const GstMetaInfo *meta =
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gst_meta_register (GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE,
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"GstVideoGLTextureUploadMeta",
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sizeof (GstVideoGLTextureUploadMeta),
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NULL,
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gst_video_gl_texture_upload_meta_free,
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gst_video_gl_texture_upload_meta_transform);
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g_once_init_leave (&info, meta);
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}
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return info;
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}
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/**
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* gst_buffer_add_video_gl_texture_upload_meta:
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* @buffer: a #GstBuffer
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* @upload: the function to upload the buffer to a specific texture ID
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* @user_data: user data for the implementor of @upload
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* @user_data_copy: function to copy @user_data
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* @user_data_free: function to free @user_data
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*
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* Attaches GstVideoGLTextureUploadMeta metadata to @buffer with the given
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* parameters.
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*
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* Returns: the #GstVideoGLTextureUploadMeta on @buffer.
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*/
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GstVideoGLTextureUploadMeta *
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gst_buffer_add_video_gl_texture_upload_meta (GstBuffer * buffer,
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GstVideoGLTextureOrientation texture_orientation, guint n_textures,
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GstVideoGLTextureType texture_type[4], GstVideoGLTextureUpload upload,
|
|
gpointer user_data, GBoxedCopyFunc user_data_copy,
|
|
GBoxedFreeFunc user_data_free)
|
|
{
|
|
GstVideoGLTextureUploadMeta *meta;
|
|
|
|
g_return_val_if_fail (buffer != NULL, NULL);
|
|
g_return_val_if_fail (upload != NULL, NULL);
|
|
g_return_val_if_fail (n_textures > 0 && n_textures < 5, NULL);
|
|
|
|
meta =
|
|
(GstVideoGLTextureUploadMeta *) gst_buffer_add_meta (buffer,
|
|
GST_VIDEO_GL_TEXTURE_UPLOAD_META_INFO, NULL);
|
|
|
|
if (!meta)
|
|
return NULL;
|
|
|
|
meta->texture_orientation = texture_orientation;
|
|
meta->n_textures = n_textures;
|
|
memcpy (meta->texture_type, texture_type, sizeof (texture_type[0] * 4));
|
|
meta->buffer = buffer;
|
|
meta->upload = upload;
|
|
meta->user_data = user_data;
|
|
meta->user_data_copy = user_data_copy;
|
|
meta->user_data_free = user_data_free;
|
|
|
|
return meta;
|
|
}
|
|
|
|
/**
|
|
* gst_video_gl_texture_upload_meta_upload:
|
|
* @meta: a #GstVideoGLTextureUploadMeta
|
|
* @texture_id: the texture IDs to upload to
|
|
*
|
|
* Uploads the buffer which owns the meta to a specific texture ID.
|
|
*
|
|
* Returns: %TRUE if uploading succeeded, %FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_video_gl_texture_upload_meta_upload (GstVideoGLTextureUploadMeta * meta,
|
|
guint texture_id[4])
|
|
{
|
|
g_return_val_if_fail (meta != NULL, FALSE);
|
|
|
|
return meta->upload (meta, texture_id);
|
|
}
|
|
|
|
/* Region of Interest Meta implementation *******************************************/
|
|
|
|
GType
|
|
gst_video_region_of_interest_meta_api_get_type (void)
|
|
{
|
|
static volatile GType type;
|
|
static const gchar *tags[] =
|
|
{ GST_META_TAG_VIDEO_STR, GST_META_TAG_VIDEO_ORIENTATION_STR,
|
|
GST_META_TAG_VIDEO_SIZE_STR, NULL
|
|
};
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
GType _type =
|
|
gst_meta_api_type_register ("GstVideoRegionOfInterestMetaAPI", tags);
|
|
GST_INFO ("registering");
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_video_region_of_interest_meta_transform (GstBuffer * dest, GstMeta * meta,
|
|
GstBuffer * buffer, GQuark type, gpointer data)
|
|
{
|
|
GstVideoRegionOfInterestMeta *dmeta, *smeta;
|
|
|
|
if (GST_META_TRANSFORM_IS_COPY (type)) {
|
|
smeta = (GstVideoRegionOfInterestMeta *) meta;
|
|
|
|
GST_DEBUG ("copy region of interest metadata");
|
|
dmeta =
|
|
gst_buffer_add_video_region_of_interest_meta_id (dest,
|
|
smeta->roi_type, smeta->x, smeta->y, smeta->w, smeta->h);
|
|
dmeta->id = smeta->id;
|
|
dmeta->parent_id = smeta->parent_id;
|
|
} else if (GST_VIDEO_META_TRANSFORM_IS_SCALE (type)) {
|
|
GstVideoMetaTransform *trans = data;
|
|
gint ow, oh, nw, nh;
|
|
ow = GST_VIDEO_INFO_WIDTH (trans->in_info);
|
|
nw = GST_VIDEO_INFO_WIDTH (trans->out_info);
|
|
oh = GST_VIDEO_INFO_HEIGHT (trans->in_info);
|
|
nh = GST_VIDEO_INFO_HEIGHT (trans->out_info);
|
|
GST_DEBUG ("scaling region of interest metadata %dx%d -> %dx%d", ow, oh, nw,
|
|
nh);
|
|
|
|
smeta = (GstVideoRegionOfInterestMeta *) meta;
|
|
dmeta =
|
|
gst_buffer_add_video_region_of_interest_meta_id (dest,
|
|
smeta->roi_type, (smeta->x * nw) / ow, (smeta->y * nh) / oh,
|
|
(smeta->w * nw) / ow, (smeta->h * nh) / oh);
|
|
dmeta->id = smeta->id;
|
|
dmeta->parent_id = smeta->parent_id;
|
|
|
|
GST_DEBUG ("region of interest (id:%d, parent id:%d) offset %dx%d -> %dx%d",
|
|
smeta->id, smeta->parent_id, smeta->x, smeta->y, dmeta->x, dmeta->y);
|
|
GST_DEBUG ("region of interest size %dx%d -> %dx%d", smeta->w, smeta->h,
|
|
dmeta->w, dmeta->h);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_region_of_interest_meta_init (GstMeta * meta, gpointer params,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstVideoRegionOfInterestMeta *emeta = (GstVideoRegionOfInterestMeta *) meta;
|
|
emeta->id = 0;
|
|
emeta->parent_id = 0;
|
|
emeta->x = emeta->y = emeta->w = emeta->h = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_video_region_of_interest_meta_free (GstMeta * meta, GstBuffer * buffer)
|
|
{
|
|
// nothing to do
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_video_region_of_interest_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter (&meta_info)) {
|
|
const GstMetaInfo *mi =
|
|
gst_meta_register (GST_VIDEO_REGION_OF_INTEREST_META_API_TYPE,
|
|
"GstVideoRegionOfInterestMeta",
|
|
sizeof (GstVideoRegionOfInterestMeta),
|
|
gst_video_region_of_interest_meta_init,
|
|
gst_video_region_of_interest_meta_free,
|
|
gst_video_region_of_interest_meta_transform);
|
|
g_once_init_leave (&meta_info, mi);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_get_video_region_of_interest_meta_id:
|
|
* @buffer: a #GstBuffer
|
|
* @id: a metadata id
|
|
*
|
|
* Find the #GstVideoRegionOfInterestMeta on @buffer with the given @id.
|
|
*
|
|
* Buffers can contain multiple #GstVideoRegionOfInterestMeta metadata items if
|
|
* multiple regions of interests are marked on a frame.
|
|
*
|
|
* Returns: the #GstVideoeRegionOfInterestMeta with @id or %NULL when there is
|
|
* no such metadata on @buffer.
|
|
*/
|
|
GstVideoRegionOfInterestMeta *
|
|
gst_buffer_get_video_region_of_interest_meta_id (GstBuffer * buffer, gint id)
|
|
{
|
|
gpointer state = NULL;
|
|
GstMeta *meta;
|
|
const GstMetaInfo *info = GST_VIDEO_REGION_OF_INTEREST_META_INFO;
|
|
|
|
while ((meta = gst_buffer_iterate_meta (buffer, &state))) {
|
|
if (meta->info->api == info->api) {
|
|
GstVideoRegionOfInterestMeta *vmeta =
|
|
(GstVideoRegionOfInterestMeta *) meta;
|
|
if (vmeta->id == id)
|
|
return vmeta;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_video_region_of_interest_meta:
|
|
* @buffer: a #GstBuffer
|
|
* @roi_type: Type of the region of interest (e.g. "face")
|
|
* @x: X position
|
|
* @y: Y position
|
|
* @w: width
|
|
* @h: height
|
|
*
|
|
* Attaches #GstVideoRegionOfInterestMeta metadata to @buffer with the given
|
|
* parameters.
|
|
*
|
|
* Returns: the #GstVideoRegionOfInterestMeta on @buffer.
|
|
*/
|
|
GstVideoRegionOfInterestMeta *
|
|
gst_buffer_add_video_region_of_interest_meta (GstBuffer * buffer,
|
|
const gchar * roi_type, guint x, guint y, guint w, guint h)
|
|
{
|
|
return gst_buffer_add_video_region_of_interest_meta_id (buffer,
|
|
g_quark_from_string (roi_type), x, y, w, h);
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_video_region_of_interest_meta_id:
|
|
* @buffer: a #GstBuffer
|
|
* @roi_type: Type of the region of interest (e.g. "face")
|
|
* @x: X position
|
|
* @y: Y position
|
|
* @w: width
|
|
* @h: height
|
|
*
|
|
* Attaches #GstVideoRegionOfInterestMeta metadata to @buffer with the given
|
|
* parameters.
|
|
*
|
|
* Returns: the #GstVideoRegionOfInterestMeta on @buffer.
|
|
*/
|
|
GstVideoRegionOfInterestMeta *
|
|
gst_buffer_add_video_region_of_interest_meta_id (GstBuffer * buffer,
|
|
GQuark roi_type, guint x, guint y, guint w, guint h)
|
|
{
|
|
GstVideoRegionOfInterestMeta *meta;
|
|
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
|
|
|
|
meta = (GstVideoRegionOfInterestMeta *) gst_buffer_add_meta (buffer,
|
|
GST_VIDEO_REGION_OF_INTEREST_META_INFO, NULL);
|
|
meta->roi_type = roi_type;
|
|
meta->x = x;
|
|
meta->y = y;
|
|
meta->w = w;
|
|
meta->h = h;
|
|
|
|
return meta;
|
|
}
|