/* GStreamer * Copyright (C) <2012> Wim Taymans * Copyright (C) <2020> Matthew Waters * * gstrtphdrext.h: RTP header extensions * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifndef __GST_RTPHDREXT_H__ #define __GST_RTPHDREXT_H__ #include #include G_BEGIN_DECLS #define GST_RTP_HDREXT_BASE "urn:ietf:params:rtp-hdrext:" /* RFC 6051 */ #define GST_RTP_HDREXT_NTP_64 "ntp-64" #define GST_RTP_HDREXT_NTP_64_SIZE 8 GST_RTP_API gboolean gst_rtp_hdrext_set_ntp_64 (gpointer data, guint size, guint64 ntptime); GST_RTP_API gboolean gst_rtp_hdrext_get_ntp_64 (gpointer data, guint size, guint64 *ntptime); #define GST_RTP_HDREXT_NTP_56 "ntp-56" #define GST_RTP_HDREXT_NTP_56_SIZE 7 GST_RTP_API gboolean gst_rtp_hdrext_set_ntp_56 (gpointer data, guint size, guint64 ntptime); GST_RTP_API gboolean gst_rtp_hdrext_get_ntp_56 (gpointer data, guint size, guint64 *ntptime); /** * GST_RTP_HDREXT_ELEMENT_CLASS: * * Constant string used in element classification to signal that this element * is a RTP header extension. * * Since: 1.20 */ #define GST_RTP_HDREXT_ELEMENT_CLASS "Network/Extension/RTPHeader" GST_RTP_API GType gst_rtp_header_extension_get_type (void); #define GST_TYPE_RTP_HEADER_EXTENSION (gst_rtp_header_extension_get_type()) #define GST_RTP_HEADER_EXTENSION(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtension)) #define GST_RTP_HEADER_EXTENSION_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtensionClass)) #define GST_RTP_HEADER_EXTENSION_GET_CLASS(obj) \ (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtensionClass)) #define GST_IS_RTP_HEADER_EXTENSION(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_HEADER_EXTENSION)) #define GST_IS_RTP_HEADER_EXTENSION_CLASS(klass) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_HEADER_EXTENSION)) /** * GST_RTP_HEADER_EXTENSION_CAST: * * Since: 1.20 */ #define GST_RTP_HEADER_EXTENSION_CAST(obj) ((GstRTPHeaderExtension *)(obj)) typedef struct _GstRTPHeaderExtension GstRTPHeaderExtension; typedef struct _GstRTPHeaderExtensionClass GstRTPHeaderExtensionClass; /** * GstRTPHeaderExtensionFlags: * @GST_RTP_HEADER_EXTENSION_ONE_BYTE: The one byte rtp extension header. * 1-16 data bytes per extension with a maximum of * 14 extension ids in total. * @GST_RTP_HEADER_EXTENSION_TWO_BYTE: The two byte rtp extension header. * 256 data bytes per extension with a maximum of 255 (or 256 * including appbits) extensions in total. * * Flags that apply to a RTP Audio/Video header extension. * * Since: 1.20 */ typedef enum /*< underscore_name=gst_rtp_header_extension_flags >*/ { GST_RTP_HEADER_EXTENSION_ONE_BYTE = (1 << 0), GST_RTP_HEADER_EXTENSION_TWO_BYTE = (1 << 1), } GstRTPHeaderExtensionFlags; /** * GstRTPHeaderExtension: * @parent: the parent #GObject * @ext_id: the configured extension id * * Instance struct for a RTP Audio/Video header extension. * * Since: 1.20 */ struct _GstRTPHeaderExtension { GstElement parent; guint ext_id; /*< private >*/ gpointer _gst_reserved[GST_PADDING]; }; /** * GstRTPHeaderExtensionClass: * @parent_class: the parent class * @get_uri: retrieve the RTP extension uri * @get_supported_flags: retrieve the supported flags * @get_max_size: retrieve the maximum size for this extension based on the * information available from input_meta. Implementations should attempt * to provide as accurate information as possible as the returned value * will be used to control the amount of possible data in the payload. * Implementations must return the maximum as the allocated size for * writing the extension will be at least the size of the returned value. * Return the amount of data read or <0 on failure. * @write: write into @data the information for this extension. Various * information is provided to help writing extensions in particular cases. * @read: read from a rtp payloaded buffer and extract the extension * information, optionally adding some meta onto the output buffer. * @set_non_rtp_sink_caps: read any information from sink caps that the header * extension needs for its function. * @set_attributes_from_caps: read the caps information to set the necessary * attributes that may be signaled e.g. with an SDP. * @set_caps_from_attributes: write the necessary caps field/s for the configured * attributes e.g. as signalled with SDP. * * Base class for RTP Header extensions. * * Since: 1.20 */ struct _GstRTPHeaderExtensionClass { GstElementClass parent_class; /*< public >*/ GstRTPHeaderExtensionFlags (*get_supported_flags) (GstRTPHeaderExtension * ext); gsize (*get_max_size) (GstRTPHeaderExtension * ext, const GstBuffer * input_meta); gsize (*write) (GstRTPHeaderExtension * ext, const GstBuffer * input_meta, GstRTPHeaderExtensionFlags write_flags, GstBuffer * output, guint8 * data, gsize size); gboolean (*read) (GstRTPHeaderExtension * ext, GstRTPHeaderExtensionFlags read_flags, const guint8 * data, gsize size, GstBuffer * buffer); gboolean (*set_non_rtp_sink_caps) (GstRTPHeaderExtension * ext, const GstCaps * caps); gboolean (*set_attributes_from_caps) (GstRTPHeaderExtension * ext, const GstCaps * caps); gboolean (*set_caps_from_attributes) (GstRTPHeaderExtension * ext, GstCaps * caps); /*< private >*/ gpointer _gst_reserved[GST_PADDING]; }; G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstRTPHeaderExtension, gst_object_unref) /** * GST_RTP_HEADER_EXTENSION_URI_METADATA_KEY: * * Since: 1.20 */ #define GST_RTP_HEADER_EXTENSION_URI_METADATA_KEY "RTP-Header-Extension-URI" GST_RTP_API void gst_rtp_header_extension_class_set_uri (GstRTPHeaderExtensionClass *klass, const gchar * uri); GST_RTP_API const gchar * gst_rtp_header_extension_get_uri (GstRTPHeaderExtension * ext); GST_RTP_API gsize gst_rtp_header_extension_get_max_size (GstRTPHeaderExtension * ext, const GstBuffer * input_meta); GST_RTP_API GstRTPHeaderExtensionFlags gst_rtp_header_extension_get_supported_flags (GstRTPHeaderExtension * ext); GST_RTP_API guint gst_rtp_header_extension_get_id (GstRTPHeaderExtension * ext); GST_RTP_API void gst_rtp_header_extension_set_id (GstRTPHeaderExtension * ext, guint ext_id); GST_RTP_API gsize gst_rtp_header_extension_write (GstRTPHeaderExtension * ext, const GstBuffer * input_meta, GstRTPHeaderExtensionFlags write_flags, GstBuffer * output, guint8 * data, gsize size); GST_RTP_API gboolean gst_rtp_header_extension_read (GstRTPHeaderExtension * ext, GstRTPHeaderExtensionFlags read_flags, const guint8 * data, gsize size, GstBuffer * buffer); GST_RTP_API gboolean gst_rtp_header_extension_set_non_rtp_sink_caps (GstRTPHeaderExtension * ext, const GstCaps * caps); GST_RTP_API gboolean gst_rtp_header_extension_set_caps_from_attributes (GstRTPHeaderExtension * ext, GstCaps * caps); GST_RTP_API gboolean gst_rtp_header_extension_set_attributes_from_caps (GstRTPHeaderExtension * ext, const GstCaps * caps); GST_RTP_API GList * gst_rtp_get_header_extension_list (void); GST_RTP_API GstRTPHeaderExtension * gst_rtp_header_extension_create_from_uri (const gchar * uri); GST_RTP_API gchar * gst_rtp_header_extension_get_sdp_caps_field_name (GstRTPHeaderExtension * ext); GST_RTP_API gboolean gst_rtp_header_extension_set_attributes_from_caps_simple_sdp (GstRTPHeaderExtension * ext, const GstCaps *caps); GST_RTP_API gboolean gst_rtp_header_extension_set_caps_from_attributes_simple_sdp (GstRTPHeaderExtension * ext, GstCaps *caps); G_END_DECLS #endif /* __GST_RTPHDREXT_H__ */