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f766b85b96
Add a source-info property that will read/write meta to the buffers about RTP source information. The GstRTPSourceMeta can be used to transport information about the origin of a buffer, e.g. the sources that is included in a mixed audio buffer. A new function gst_rtp_base_payload_allocate_output_buffer() is added for payloaders to use to allocate the output RTP buffer with the correct number of CSRCs according to the meta and fill it. RTPSourceMeta does not make sense on RTP buffers since the information is in the RTP header. So the payloader will strip the meta from the output buffer. https://bugzilla.gnome.org/show_bug.cgi?id=761947
137 lines
5.2 KiB
C
137 lines
5.2 KiB
C
/* GStreamer
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* Copyright (C) <2005> Philippe Khalaf <burger@speedy.org>
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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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#ifndef __GST_RTP_BASE_DEPAYLOAD_H__
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#define __GST_RTP_BASE_DEPAYLOAD_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_TYPE_RTP_BASE_DEPAYLOAD (gst_rtp_base_depayload_get_type())
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#define GST_RTP_BASE_DEPAYLOAD(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_BASE_DEPAYLOAD,GstRTPBaseDepayload))
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#define GST_RTP_BASE_DEPAYLOAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_BASE_DEPAYLOAD,GstRTPBaseDepayloadClass))
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#define GST_RTP_BASE_DEPAYLOAD_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_RTP_BASE_DEPAYLOAD,GstRTPBaseDepayloadClass))
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#define GST_IS_RTP_BASE_DEPAYLOAD(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_BASE_DEPAYLOAD))
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#define GST_IS_RTP_BASE_DEPAYLOAD_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_BASE_DEPAYLOAD))
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#define GST_RTP_BASE_DEPAYLOAD_CAST(obj) ((GstRTPBaseDepayload *)(obj))
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#define GST_RTP_BASE_DEPAYLOAD_SINKPAD(depayload) (GST_RTP_BASE_DEPAYLOAD_CAST (depayload)->sinkpad)
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#define GST_RTP_BASE_DEPAYLOAD_SRCPAD(depayload) (GST_RTP_BASE_DEPAYLOAD_CAST (depayload)->srcpad)
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typedef struct _GstRTPBaseDepayload GstRTPBaseDepayload;
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typedef struct _GstRTPBaseDepayloadClass GstRTPBaseDepayloadClass;
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typedef struct _GstRTPBaseDepayloadPrivate GstRTPBaseDepayloadPrivate;
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struct _GstRTPBaseDepayload
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{
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GstElement parent;
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GstPad *sinkpad, *srcpad;
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/* this attribute must be set by the child */
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guint clock_rate;
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GstSegment segment;
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gboolean need_newsegment;
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/*< private >*/
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GstRTPBaseDepayloadPrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstRTPBaseDepayloadClass:
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* @parent_class: the parent class
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* @set_caps: configure the depayloader
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* @process: process incoming rtp packets. Subclass must implement either
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* this method or @process_rtp_packet to process incoming rtp packets.
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* If the child returns a buffer without a valid timestamp, the timestamp
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* of the provided buffer will be applied to the result buffer and the
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* buffer will be pushed. If this function returns %NULL, nothing is pushed.
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* @packet_lost: signal the depayloader about packet loss
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* @handle_event: custom event handling
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* @process_rtp_packet: Same as the process virtual function, but slightly more
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* efficient, since it is passed the rtp buffer structure that has already
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* been mapped (with GST_MAP_READ) by the base class and thus does not have
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* to be mapped again by the subclass. Can be used by the subclass to process
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* incoming rtp packets. If the subclass returns a buffer without a valid
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* timestamp, the timestamp of the input buffer will be applied to the result
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* buffer and the output buffer will be pushed out. If this function returns
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* %NULL, nothing is pushed out. Since: 1.6.
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*
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* Base class for RTP depayloaders.
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*/
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struct _GstRTPBaseDepayloadClass
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{
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GstElementClass parent_class;
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/*< public >*/
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/* virtuals, inform the subclass of the caps. */
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gboolean (*set_caps) (GstRTPBaseDepayload *filter, GstCaps *caps);
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/* pure virtual function */
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GstBuffer * (*process) (GstRTPBaseDepayload *base, GstBuffer *in);
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/* non-pure function used to to signal the depayloader about packet loss. the
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* timestamp and duration are the estimated values of the lost packet.
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* The default implementation of this message pushes a segment update. */
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gboolean (*packet_lost) (GstRTPBaseDepayload *filter, GstEvent *event);
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/* the default implementation does the default actions for events but
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* implementation can override. */
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gboolean (*handle_event) (GstRTPBaseDepayload * filter, GstEvent * event);
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GstBuffer * (*process_rtp_packet) (GstRTPBaseDepayload *base, GstRTPBuffer * rtp_buffer);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING - 1];
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};
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GST_RTP_API
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GType gst_rtp_base_depayload_get_type (void);
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GST_RTP_API
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GstFlowReturn gst_rtp_base_depayload_push (GstRTPBaseDepayload *filter, GstBuffer *out_buf);
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GST_RTP_API
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GstFlowReturn gst_rtp_base_depayload_push_list (GstRTPBaseDepayload *filter, GstBufferList *out_list);
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GST_RTP_API
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gboolean gst_rtp_base_depayload_is_source_info_enabled (GstRTPBaseDepayload * depayload);
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GST_RTP_API
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void gst_rtp_base_depayload_set_source_info_enabled (GstRTPBaseDepayload * depayload,
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gboolean enable);
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#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstRTPBaseDepayload, gst_object_unref)
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#endif
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G_END_DECLS
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#endif /* __GST_RTP_BASE_DEPAYLOAD_H__ */
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