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b53ea86ab0
https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/748#note_1223253 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1537>
294 lines
12 KiB
C
294 lines
12 KiB
C
/* GStreamer
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* Copyright (C) <2012> Wim Taymans <wim.taymans@gmail.com>
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* Copyright (C) <2020> Matthew Waters <matthew@centricular.com>
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*
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* gstrtphdrext.h: RTP header extensions
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_RTPHDREXT_H__
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#define __GST_RTPHDREXT_H__
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#include <gst/gst.h>
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#include <gst/rtp/gstrtpbuffer.h>
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G_BEGIN_DECLS
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#define GST_RTP_HDREXT_BASE "urn:ietf:params:rtp-hdrext:"
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/* RFC 6051 */
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#define GST_RTP_HDREXT_NTP_64 "ntp-64"
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#define GST_RTP_HDREXT_NTP_64_SIZE 8
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GST_RTP_API
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gboolean gst_rtp_hdrext_set_ntp_64 (gpointer data, guint size, guint64 ntptime);
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GST_RTP_API
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gboolean gst_rtp_hdrext_get_ntp_64 (gpointer data, guint size, guint64 *ntptime);
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#define GST_RTP_HDREXT_NTP_56 "ntp-56"
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#define GST_RTP_HDREXT_NTP_56_SIZE 7
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GST_RTP_API
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gboolean gst_rtp_hdrext_set_ntp_56 (gpointer data, guint size, guint64 ntptime);
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GST_RTP_API
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gboolean gst_rtp_hdrext_get_ntp_56 (gpointer data, guint size, guint64 *ntptime);
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/**
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* GST_RTP_HDREXT_ELEMENT_CLASS:
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*
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* Constant string used in element classification to signal that this element
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* is a RTP header extension.
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*
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* Since: 1.20
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*/
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#define GST_RTP_HDREXT_ELEMENT_CLASS "Network/Extension/RTPHeader"
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GST_RTP_API
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GType gst_rtp_header_extension_get_type (void);
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#define GST_TYPE_RTP_HEADER_EXTENSION (gst_rtp_header_extension_get_type())
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#define GST_RTP_HEADER_EXTENSION(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtension))
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#define GST_RTP_HEADER_EXTENSION_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtensionClass))
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#define GST_RTP_HEADER_EXTENSION_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtensionClass))
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#define GST_IS_RTP_HEADER_EXTENSION(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_HEADER_EXTENSION))
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#define GST_IS_RTP_HEADER_EXTENSION_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_HEADER_EXTENSION))
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/**
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* GST_RTP_HEADER_EXTENSION_CAST:
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*
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* Since: 1.20
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*/
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#define GST_RTP_HEADER_EXTENSION_CAST(obj) ((GstRTPHeaderExtension *)(obj))
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typedef struct _GstRTPHeaderExtension GstRTPHeaderExtension;
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typedef struct _GstRTPHeaderExtensionClass GstRTPHeaderExtensionClass;
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/**
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* GstRTPHeaderExtensionFlags:
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* @GST_RTP_HEADER_EXTENSION_ONE_BYTE: The one byte rtp extension header.
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* 1-16 data bytes per extension with a maximum of
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* 14 extension ids in total.
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* @GST_RTP_HEADER_EXTENSION_TWO_BYTE: The two byte rtp extension header.
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* 256 data bytes per extension with a maximum of 255 (or 256
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* including appbits) extensions in total.
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*
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* Flags that apply to a RTP Audio/Video header extension.
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*
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* Since: 1.20
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*/
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typedef enum /*< underscore_name=gst_rtp_header_extension_flags >*/
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{
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GST_RTP_HEADER_EXTENSION_ONE_BYTE = (1 << 0),
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GST_RTP_HEADER_EXTENSION_TWO_BYTE = (1 << 1),
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} GstRTPHeaderExtensionFlags;
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/**
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* GstRTPHeaderExtensionDirection:
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* @GST_RTP_HEADER_EXTENSION_DIRECTION_INACTIVE: Neither send nor
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* receive RTP Header Extensions
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* @GST_RTP_HEADER_EXTENSION_DIRECTION_SENDONLY: Only send RTP Header
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* Extensions @GST_RTP_HEADER_EXTENSION_DIRECTION_RECVONLY: Only
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* receive RTP Header Extensions
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* @GST_RTP_HEADER_EXTENSION_DIRECTION_SENDRECV: Send and receive RTP
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* Header Extensions ext
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* @GST_RTP_HEADER_EXTENSION_DIRECTION_INHERITED: RTP header extension
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* direction is inherited from the stream
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*
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* Direction to which to apply the RTP Header Extension
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*
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* Since: 1.20
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*/
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typedef enum /*< underscore_name=gst_rtp_header_extension_direction >*/
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{
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GST_RTP_HEADER_EXTENSION_DIRECTION_INACTIVE = 0,
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GST_RTP_HEADER_EXTENSION_DIRECTION_SENDONLY = (1 << 0),
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GST_RTP_HEADER_EXTENSION_DIRECTION_RECVONLY = (1 << 1),
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GST_RTP_HEADER_EXTENSION_DIRECTION_SENDRECV = (
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GST_RTP_HEADER_EXTENSION_DIRECTION_SENDONLY |
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GST_RTP_HEADER_EXTENSION_DIRECTION_RECVONLY),
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GST_RTP_HEADER_EXTENSION_DIRECTION_INHERITED = (1 << 2)
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} GstRTPHeaderExtensionDirection;
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/**
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* GstRTPHeaderExtension:
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* @parent: the parent #GObject
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* @ext_id: the configured extension id
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*
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* Instance struct for a RTP Audio/Video header extension.
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*
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* Since: 1.20
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*/
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struct _GstRTPHeaderExtension
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{
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GstElement parent;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstRTPHeaderExtensionClass:
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* @parent_class: the parent class
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* @get_uri: retrieve the RTP extension uri
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* @get_supported_flags: retrieve the supported flags
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* @get_max_size: retrieve the maximum size for this extension based on the
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* information available from input_meta. Implementations should attempt
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* to provide as accurate information as possible as the returned value
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* will be used to control the amount of possible data in the payload.
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* Implementations must return the maximum as the allocated size for
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* writing the extension will be at least the size of the returned value.
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* Return the amount of data read or <0 on failure.
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* @write: write into @data the information for this extension. Various
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* information is provided to help writing extensions in particular cases.
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* @read: read from a rtp payloaded buffer and extract the extension
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* information, optionally adding some meta onto the output buffer.
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* @set_non_rtp_sink_caps: read any information from sink caps that the header
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* extension needs for its function.
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* @update_non_rtp_src_caps: update depayloader non-RTP (depayloaded) caps with
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* the information parsed from RTP header.
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* @set_attributes: set the necessary attributes that may be signaled e.g. with
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* an SDP.
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* @set_caps_from_attributes: write the necessary caps field/s for the configured
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* attributes e.g. as signalled with SDP.
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*
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* Base class for RTP Header extensions.
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*
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* Since: 1.20
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*/
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struct _GstRTPHeaderExtensionClass
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{
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GstElementClass parent_class;
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/*< public >*/
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GstRTPHeaderExtensionFlags (*get_supported_flags) (GstRTPHeaderExtension * ext);
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gsize (*get_max_size) (GstRTPHeaderExtension * ext,
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const GstBuffer * input_meta);
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gssize (*write) (GstRTPHeaderExtension * ext,
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const GstBuffer * input_meta,
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GstRTPHeaderExtensionFlags write_flags,
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GstBuffer * output,
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guint8 * data,
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gsize size);
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gboolean (*read) (GstRTPHeaderExtension * ext,
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GstRTPHeaderExtensionFlags read_flags,
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const guint8 * data,
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gsize size,
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GstBuffer * buffer);
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gboolean (*set_non_rtp_sink_caps) (GstRTPHeaderExtension * ext,
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const GstCaps * caps);
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gboolean (*update_non_rtp_src_caps) (GstRTPHeaderExtension * ext,
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GstCaps * caps);
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gboolean (*set_attributes) (GstRTPHeaderExtension * ext,
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GstRTPHeaderExtensionDirection direction,
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const gchar * attributes);
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gboolean (*set_caps_from_attributes) (GstRTPHeaderExtension * ext,
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GstCaps * caps);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstRTPHeaderExtension, gst_object_unref)
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/**
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* GST_RTP_HEADER_EXTENSION_URI_METADATA_KEY:
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*
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* Since: 1.20
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*/
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#define GST_RTP_HEADER_EXTENSION_URI_METADATA_KEY "RTP-Header-Extension-URI"
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GST_RTP_API
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void gst_rtp_header_extension_class_set_uri (GstRTPHeaderExtensionClass *klass,
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const gchar * uri);
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GST_RTP_API
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const gchar * gst_rtp_header_extension_get_uri (GstRTPHeaderExtension * ext);
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GST_RTP_API
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gsize gst_rtp_header_extension_get_max_size (GstRTPHeaderExtension * ext,
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const GstBuffer * input_meta);
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GST_RTP_API
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GstRTPHeaderExtensionFlags gst_rtp_header_extension_get_supported_flags (GstRTPHeaderExtension * ext);
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GST_RTP_API
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guint gst_rtp_header_extension_get_id (GstRTPHeaderExtension * ext);
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GST_RTP_API
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void gst_rtp_header_extension_set_id (GstRTPHeaderExtension * ext,
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guint ext_id);
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GST_RTP_API
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gssize gst_rtp_header_extension_write (GstRTPHeaderExtension * ext,
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const GstBuffer * input_meta,
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GstRTPHeaderExtensionFlags write_flags,
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GstBuffer * output,
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guint8 * data,
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gsize size);
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GST_RTP_API
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gboolean gst_rtp_header_extension_read (GstRTPHeaderExtension * ext,
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GstRTPHeaderExtensionFlags read_flags,
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const guint8 * data,
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gsize size,
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GstBuffer * buffer);
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GST_RTP_API
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gboolean gst_rtp_header_extension_set_non_rtp_sink_caps (GstRTPHeaderExtension * ext,
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const GstCaps * caps);
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GST_RTP_API
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gboolean gst_rtp_header_extension_wants_update_non_rtp_src_caps (GstRTPHeaderExtension * ext);
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GST_RTP_API
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void gst_rtp_header_extension_set_wants_update_non_rtp_src_caps (GstRTPHeaderExtension * ext,
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gboolean state);
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GST_RTP_API
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gboolean gst_rtp_header_extension_update_non_rtp_src_caps (GstRTPHeaderExtension * ext,
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GstCaps * caps);
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GST_RTP_API
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gboolean gst_rtp_header_extension_set_caps_from_attributes (GstRTPHeaderExtension * ext,
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GstCaps * caps);
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GST_RTP_API
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gboolean gst_rtp_header_extension_set_attributes_from_caps (GstRTPHeaderExtension * ext,
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const GstCaps * caps);
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GST_RTP_API
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GList * gst_rtp_get_header_extension_list (void);
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GST_RTP_API
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GstRTPHeaderExtension * gst_rtp_header_extension_create_from_uri (const gchar * uri);
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GST_RTP_API
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gchar * gst_rtp_header_extension_get_sdp_caps_field_name (GstRTPHeaderExtension * ext);
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GST_RTP_API
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void gst_rtp_header_extension_set_direction (GstRTPHeaderExtension * ext,
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GstRTPHeaderExtensionDirection direction);
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GST_RTP_API
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GstRTPHeaderExtensionDirection gst_rtp_header_extension_get_direction (GstRTPHeaderExtension * ext);
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GST_RTP_API
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gboolean gst_rtp_header_extension_set_caps_from_attributes_helper (GstRTPHeaderExtension * ext,
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GstCaps * caps,
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const gchar * attributes);
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G_END_DECLS
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#endif /* __GST_RTPHDREXT_H__ */
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