diff options
| -rw-r--r-- | gst-libs/gst/video/gstvideometa.c | 63 | ||||
| -rw-r--r-- | gst-libs/gst/video/gstvideometa.h | 10 |
2 files changed, 72 insertions, 1 deletions
diff --git a/gst-libs/gst/video/gstvideometa.c b/gst-libs/gst/video/gstvideometa.c index 58b268071..501efd30b 100644 --- a/gst-libs/gst/video/gstvideometa.c +++ b/gst-libs/gst/video/gstvideometa.c @@ -736,6 +736,7 @@ gst_video_region_of_interest_meta_init (GstMeta * meta, gpointer params, emeta->id = 0; emeta->parent_id = 0; emeta->x = emeta->y = emeta->w = emeta->h = 0; + emeta->params = NULL; return TRUE; } @@ -743,7 +744,9 @@ gst_video_region_of_interest_meta_init (GstMeta * meta, gpointer params, static void gst_video_region_of_interest_meta_free (GstMeta * meta, GstBuffer * buffer) { - // nothing to do + GstVideoRegionOfInterestMeta *emeta = (GstVideoRegionOfInterestMeta *) meta; + + g_list_free_full (emeta->params, (GDestroyNotify) gst_structure_free); } const GstMetaInfo * @@ -850,6 +853,64 @@ gst_buffer_add_video_region_of_interest_meta_id (GstBuffer * buffer, return meta; } +/** + * gst_video_region_of_interest_meta_add_param: + * @meta: a #GstVideoRegionOfInterestMeta + * @s: (transfer full): a #GstStructure + * + * Attach element-specific parameters to @meta meant to be used by downstream + * elements which may handle this ROI. + * The name of @s is used to identify the element these parameters are meant for. + * + * This is typically used to tell encoders how they should encode this specific region. + * For example, a structure named "roi/x264enc" could be used to give the + * QP offsets this encoder should use when encoding the region described in @meta. + * Multiple parameters can be defined for the same meta so different encoders + * can be supported by cross platform applications). + * + * Since: 1.14 + */ +void +gst_video_region_of_interest_meta_add_param (GstVideoRegionOfInterestMeta * + meta, GstStructure * s) +{ + g_return_if_fail (meta); + g_return_if_fail (s); + + meta->params = g_list_append (meta->params, s); +} + +/** + * gst_video_region_of_interest_meta_get_param: + * @meta: a #GstVideoRegionOfInterestMeta + * + * Retrieve the parameter for @meta having @name as structure name, + * or %NULL if there is none. + * + * Returns: (transfer none) (nullable): a #GstStructure + * + * Since: 1.14 + * @see_also: gst_video_region_of_interest_meta_add_param() + */ +GstStructure * +gst_video_region_of_interest_meta_get_param (GstVideoRegionOfInterestMeta * + meta, const gchar * name) +{ + GList *l; + + g_return_val_if_fail (meta, NULL); + g_return_val_if_fail (name, NULL); + + for (l = meta->params; l; l = g_list_next (l)) { + GstStructure *s = l->data; + + if (gst_structure_has_name (s, name)) + return s; + } + + return NULL; +} + /* Time Code Meta implementation *******************************************/ GType diff --git a/gst-libs/gst/video/gstvideometa.h b/gst-libs/gst/video/gstvideometa.h index 477a29762..cb2ea1c82 100644 --- a/gst-libs/gst/video/gstvideometa.h +++ b/gst-libs/gst/video/gstvideometa.h @@ -281,6 +281,7 @@ gboolean gst_video_gl_texture_upload_meta_upload (GstVideoGLTextureUploadMe * @y: y component of upper-left corner * @w: bounding box width * @h: bounding box height + * @params: list of #GstStructure containing element-specific params for downstream, see gst_video_region_of_interest_meta_add_params(). (Since: 1.14) * * Extra buffer metadata describing an image region of interest */ @@ -295,6 +296,8 @@ typedef struct { guint y; guint w; guint h; + + GList *params; } GstVideoRegionOfInterestMeta; GST_EXPORT @@ -325,6 +328,13 @@ GstVideoRegionOfInterestMeta *gst_buffer_add_video_region_of_interest_meta_id (G guint y, guint w, guint h); +GST_EXPORT +void gst_video_region_of_interest_meta_add_param (GstVideoRegionOfInterestMeta * meta, + GstStructure * s); + +GST_EXPORT +GstStructure *gst_video_region_of_interest_meta_get_param (GstVideoRegionOfInterestMeta * meta, + const gchar * name); /** * GstVideoTimeCodeMeta: |