/* GStreamer * Copyright (C) <2005> Philippe Khalaf * <2005> Wim Taymans * * gstrtpbuffer.h: various helper functions to manipulate buffers * with RTP payload. * * 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_RTPBUFFER_H__ #define __GST_RTPBUFFER_H__ #include #include G_BEGIN_DECLS /** * GST_RTP_VERSION: * * The supported RTP version 2. */ #define GST_RTP_VERSION 2 typedef struct _GstRTPBuffer GstRTPBuffer; /** * GstRTPBuffer: * @buffer: pointer to RTP buffer * @state: internal state * @n_map: number of mappings in @map * @map: array of #GstMapInfo * * Data structure that points to an RTP packet. * The size of the structure is made public to allow stack allocations. */ struct _GstRTPBuffer { GstBuffer *buffer; guint state; guint n_map; GstMapInfo map[4]; }; #define GST_RTP_BUFFER_INIT { NULL, 0, 0, { GST_MAP_INFO_INIT, GST_MAP_INFO_INIT, \ GST_MAP_INFO_INIT, GST_MAP_INFO_INIT} } /* creating buffers */ void gst_rtp_buffer_allocate_data (GstBuffer *buffer, guint payload_len, guint8 pad_len, guint8 csrc_count); GstBuffer* gst_rtp_buffer_new_take_data (gpointer data, gsize len); GstBuffer* gst_rtp_buffer_new_copy_data (gpointer data, gsize len); GstBuffer* gst_rtp_buffer_new_allocate (guint payload_len, guint8 pad_len, guint8 csrc_count); GstBuffer* gst_rtp_buffer_new_allocate_len (guint packet_len, guint8 pad_len, guint8 csrc_count); guint gst_rtp_buffer_calc_header_len (guint8 csrc_count); guint gst_rtp_buffer_calc_packet_len (guint payload_len, guint8 pad_len, guint8 csrc_count); guint gst_rtp_buffer_calc_payload_len (guint packet_len, guint8 pad_len, guint8 csrc_count); gboolean gst_rtp_buffer_validate_data (guint8 *data, gsize len); gboolean gst_rtp_buffer_validate (GstBuffer *buffer); gboolean gst_rtp_buffer_map (GstBuffer *buffer, GstMapFlags flags, GstRTPBuffer *rtp); gboolean gst_rtp_buffer_unmap (GstRTPBuffer *rtp); void gst_rtp_buffer_set_packet_len (GstRTPBuffer *rtp, guint len); guint gst_rtp_buffer_get_packet_len (GstRTPBuffer *rtp); guint gst_rtp_buffer_get_header_len (GstRTPBuffer *rtp); guint8 gst_rtp_buffer_get_version (GstRTPBuffer *rtp); void gst_rtp_buffer_set_version (GstRTPBuffer *rtp, guint8 version); gboolean gst_rtp_buffer_get_padding (GstRTPBuffer *rtp); void gst_rtp_buffer_set_padding (GstRTPBuffer *rtp, gboolean padding); void gst_rtp_buffer_pad_to (GstRTPBuffer *rtp, guint len); gboolean gst_rtp_buffer_get_extension (GstRTPBuffer *rtp); void gst_rtp_buffer_set_extension (GstRTPBuffer *rtp, gboolean extension); gboolean gst_rtp_buffer_get_extension_data (GstRTPBuffer *rtp, guint16 *bits, gpointer *data, guint *wordlen); gboolean gst_rtp_buffer_set_extension_data (GstRTPBuffer *rtp, guint16 bits, guint16 length); guint32 gst_rtp_buffer_get_ssrc (GstRTPBuffer *rtp); void gst_rtp_buffer_set_ssrc (GstRTPBuffer *rtp, guint32 ssrc); guint8 gst_rtp_buffer_get_csrc_count (GstRTPBuffer *rtp); guint32 gst_rtp_buffer_get_csrc (GstRTPBuffer *rtp, guint8 idx); void gst_rtp_buffer_set_csrc (GstRTPBuffer *rtp, guint8 idx, guint32 csrc); gboolean gst_rtp_buffer_get_marker (GstRTPBuffer *rtp); void gst_rtp_buffer_set_marker (GstRTPBuffer *rtp, gboolean marker); guint8 gst_rtp_buffer_get_payload_type (GstRTPBuffer *rtp); void gst_rtp_buffer_set_payload_type (GstRTPBuffer *rtp, guint8 payload_type); guint16 gst_rtp_buffer_get_seq (GstRTPBuffer *rtp); void gst_rtp_buffer_set_seq (GstRTPBuffer *rtp, guint16 seq); guint32 gst_rtp_buffer_get_timestamp (GstRTPBuffer *rtp); void gst_rtp_buffer_set_timestamp (GstRTPBuffer *rtp, guint32 timestamp); GstBuffer* gst_rtp_buffer_get_payload_buffer (GstRTPBuffer *rtp); GstBuffer* gst_rtp_buffer_get_payload_subbuffer (GstRTPBuffer *rtp, guint offset, guint len); guint gst_rtp_buffer_get_payload_len (GstRTPBuffer *rtp); gpointer gst_rtp_buffer_get_payload (GstRTPBuffer *rtp); /* some helpers */ guint32 gst_rtp_buffer_default_clock_rate (guint8 payload_type); gint gst_rtp_buffer_compare_seqnum (guint16 seqnum1, guint16 seqnum2); guint64 gst_rtp_buffer_ext_timestamp (guint64 *exttimestamp, guint32 timestamp); gboolean gst_rtp_buffer_get_extension_onebyte_header (GstRTPBuffer *rtp, guint8 id, guint nth, gpointer * data, guint * size); gboolean gst_rtp_buffer_get_extension_twobytes_header (GstRTPBuffer *rtp, guint8 * appbits, guint8 id, guint nth, gpointer * data, guint * size); gboolean gst_rtp_buffer_add_extension_onebyte_header (GstRTPBuffer *rtp, guint8 id, gpointer data, guint size); gboolean gst_rtp_buffer_add_extension_twobytes_header (GstRTPBuffer *rtp, guint8 appbits, guint8 id, gpointer data, guint size); G_END_DECLS #endif /* __GST_RTPBUFFER_H__ */