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121 lines
4.9 KiB
C
121 lines
4.9 KiB
C
/*
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* RTP definitions
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* Copyright (c) 2006 Ryan Martell <rdm4@martellventures.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// this is a bit of a misnomer, because rtp & rtsp internal structures and prototypes are in here.
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#ifndef FFMPEG_RTP_INTERNAL_H
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#define FFMPEG_RTP_INTERNAL_H
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#include <stdint.h>
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#include "avcodec.h"
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#include "rtp.h"
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// these statistics are used for rtcp receiver reports...
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typedef struct {
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uint16_t max_seq; ///< highest sequence number seen
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uint32_t cycles; ///< shifted count of sequence number cycles
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uint32_t base_seq; ///< base sequence number
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uint32_t bad_seq; ///< last bad sequence number + 1
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int probation; ///< sequence packets till source is valid
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int received; ///< packets received
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int expected_prior; ///< packets expected in last interval
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int received_prior; ///< packets received in last interval
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uint32_t transit; ///< relative transit time for previous packet
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uint32_t jitter; ///< estimated jitter.
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} RTPStatistics;
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typedef int (*DynamicPayloadPacketHandlerProc) (struct RTPDemuxContext * s,
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AVPacket * pkt,
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uint32_t *timestamp,
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const uint8_t * buf,
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int len);
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typedef struct RTPDynamicProtocolHandler_s {
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// fields from AVRtpDynamicPayloadType_s
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const char enc_name[50]; /* XXX: still why 50 ? ;-) */
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enum CodecType codec_type;
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enum CodecID codec_id;
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// may be null
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int (*parse_sdp_a_line) (AVStream * stream,
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void *protocol_data,
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const char *line); ///< Parse the a= line from the sdp field
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void *(*open) (); ///< allocate any data needed by the rtp parsing for this dynamic data.
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void (*close)(void *protocol_data); ///< free any data needed by the rtp parsing for this dynamic data.
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DynamicPayloadPacketHandlerProc parse_packet; ///< parse handler for this dynamic packet.
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struct RTPDynamicProtocolHandler_s *next;
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} RTPDynamicProtocolHandler;
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// moved out of rtp.c, because the h264 decoder needs to know about this structure..
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struct RTPDemuxContext {
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AVFormatContext *ic;
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AVStream *st;
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int payload_type;
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uint32_t ssrc;
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uint16_t seq;
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uint32_t timestamp;
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uint32_t base_timestamp;
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uint32_t cur_timestamp;
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int max_payload_size;
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struct MpegTSContext *ts; /* only used for MP2T payloads */
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int read_buf_index;
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int read_buf_size;
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/* used to send back RTCP RR */
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URLContext *rtp_ctx;
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char hostname[256];
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RTPStatistics statistics; ///< Statistics for this stream (used by RTCP receiver reports)
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/* rtcp sender statistics receive */
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int64_t last_rtcp_ntp_time; // TODO: move into statistics
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int64_t first_rtcp_ntp_time; // TODO: move into statistics
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uint32_t last_rtcp_timestamp; // TODO: move into statistics
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/* rtcp sender statistics */
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unsigned int packet_count; // TODO: move into statistics (outgoing)
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unsigned int octet_count; // TODO: move into statistics (outgoing)
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unsigned int last_octet_count; // TODO: move into statistics (outgoing)
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int first_packet;
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/* buffer for output */
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uint8_t buf[RTP_MAX_PACKET_LENGTH];
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uint8_t *buf_ptr;
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/* special infos for au headers parsing */
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rtp_payload_data_t *rtp_payload_data; // TODO: Move into dynamic payload handlers
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/* dynamic payload stuff */
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DynamicPayloadPacketHandlerProc parse_packet; ///< This is also copied from the dynamic protocol handler structure
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void *dynamic_protocol_context; ///< This is a copy from the values setup from the sdp parsing, in rtsp.c don't free me.
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int max_frames_per_packet;
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};
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extern RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler;
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int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size); ///< from rtsp.c, but used by rtp dynamic protocol handlers.
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void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m);
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void av_register_rtp_dynamic_payload_handlers(void);
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#endif /* FFMPEG_RTP_INTERNAL_H */
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