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231 lines
5.8 KiB
C
231 lines
5.8 KiB
C
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/* GStreamer LCEVC meta
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* Copyright (C) <2024> V-Nova International Limited
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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 "gstlcevcmeta.h"
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/**
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* SECTION:gstlcevcmeta
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* @title: GstMeta for LCEVC
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* @short_description: LCEVC related GstMeta
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*
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*/
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#define GST_CAT_DEFAULT lcevcmeta_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static gboolean
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gst_lcevc_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
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{
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GstLcevcMeta *emeta = (GstLcevcMeta *) meta;
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emeta->id = 0;
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emeta->enhancement_data = NULL;
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return TRUE;
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}
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static void
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gst_lcevc_meta_free (GstMeta * meta, GstBuffer * buffer)
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{
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GstLcevcMeta *emeta = (GstLcevcMeta *) meta;
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g_clear_pointer (&emeta->enhancement_data, gst_buffer_unref);
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}
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static gboolean
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gst_lcevc_meta_transform (GstBuffer * dest, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstLcevcMeta *dmeta, *smeta;
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smeta = (GstLcevcMeta *) 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 = (GstLcevcMeta *) gst_buffer_add_meta (dest,
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GST_LCEVC_META_INFO, NULL);
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if (!dmeta)
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return FALSE;
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GST_TRACE ("copying lcevc metadata");
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dmeta->id = smeta->id;
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g_clear_pointer (&dmeta->enhancement_data, gst_buffer_unref);
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dmeta->enhancement_data = gst_buffer_copy (smeta->enhancement_data);
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}
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} else {
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/* return FALSE, if transform type is not supported */
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return FALSE;
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}
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return TRUE;
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}
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/**
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* gst_lcevc_meta_api_get_type:
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*
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* Gets the #GType of the LCEVC meta API.
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*
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* Returns: the #GType of the LCEVC meta API.
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*
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* Since: 1.26
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*/
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GType
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gst_lcevc_meta_api_get_type (void)
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{
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static GType type = 0;
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static const gchar *tags[] = { "video", NULL };
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if (g_once_init_enter (&type)) {
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GType _type = gst_meta_api_type_register ("GstLcevcMetaAPI", 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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/**
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* gst_lcevc_meta_get_info:
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*
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* Gets the #GstMetaInfo of the LCEVC meta.
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*
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* Returns: (transfer none) : the #GstLcevcMeta of the LCEVC meta.
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*
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* Since: 1.26
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*/
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const GstMetaInfo *
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gst_lcevc_meta_get_info (void)
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{
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static const GstMetaInfo *lcevc_meta_info = NULL;
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if (g_once_init_enter ((GstMetaInfo **) & lcevc_meta_info)) {
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GST_DEBUG_CATEGORY_INIT (lcevcmeta_debug, "lcevcmeta", 0, "LCEVC Metadata");
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const GstMetaInfo *meta = gst_meta_register (GST_LCEVC_META_API_TYPE,
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"GstLcevcMeta",
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sizeof (GstLcevcMeta),
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(GstMetaInitFunction) gst_lcevc_meta_init,
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(GstMetaFreeFunction) gst_lcevc_meta_free,
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gst_lcevc_meta_transform);
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g_once_init_leave ((GstMetaInfo **) & lcevc_meta_info,
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(GstMetaInfo *) meta);
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}
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return lcevc_meta_info;
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}
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/**
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* gst_buffer_get_lcevc_meta:
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* @buffer: a #GstBuffer
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*
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* Find the #GstLcevcMeta on @buffer with the lowest @id.
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*
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* Buffers can contain multiple #GstLcevcMeta metadata items when dealing with
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* multiview buffers.
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*
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* Returns: (transfer none) (nullable): the #GstLcevcMeta with lowest id (usually 0) or %NULL when there
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* is no such metadata on @buffer.
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*
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* Since: 1.26
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*/
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GstLcevcMeta *
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gst_buffer_get_lcevc_meta (GstBuffer * buffer)
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{
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gpointer state = NULL;
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GstLcevcMeta *out = NULL;
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GstMeta *meta;
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const GstMetaInfo *info = GST_LCEVC_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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GstLcevcMeta *vmeta = (GstLcevcMeta *) meta;
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if (vmeta->id == 0)
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return vmeta; /* Early out for id 0 */
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if (out == NULL || vmeta->id < out->id)
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out = vmeta;
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}
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}
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return out;
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}
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/**
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* gst_buffer_get_lcevc_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 #GstLcevcMeta on @buffer with the given @id.
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*
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* Buffers can contain multiple #GstLcevcMeta metadata items when dealing with
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* multiview buffers.
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*
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* Returns: (transfer none) (nullable): the #GstLcevcMeta with @id or %NULL when there is no such metadata
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* on @buffer.
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*
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* Since: 1.26
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*/
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GstLcevcMeta *
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gst_buffer_get_lcevc_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_LCEVC_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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GstLcevcMeta *vmeta = (GstLcevcMeta *) 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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/**
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* gst_buffer_add_lcevc_meta:
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* @buffer: a #GstBuffer
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* @enhancement_data: (transfer none): the parsed LCEVC enhancement data
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*
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* Attaches GstLcevcMeta metadata to @buffer.
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*
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* Returns: (transfer none): the #GstLcevcMeta on @buffer.
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*
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* Since: 1.26
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*/
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GstLcevcMeta *
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gst_buffer_add_lcevc_meta (GstBuffer * buffer, GstBuffer * enhancement_data)
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{
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GstLcevcMeta *meta;
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meta = (GstLcevcMeta *) gst_buffer_add_meta (buffer, GST_LCEVC_META_INFO,
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NULL);
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if (!meta)
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return NULL;
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meta->id = 0;
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g_clear_pointer (&meta->enhancement_data, gst_buffer_unref);
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meta->enhancement_data = gst_buffer_ref (enhancement_data);
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return meta;
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}
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