53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/// RFC2250 2. Encapsulation of MPEG System and Transport Streams (p3)
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#include "rtp-packet.h"
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#include "rtp-payload-helper.h"
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#include "rtp-payload-internal.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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static int rtp_decode_ts(void* p, const void* packet, int bytes)
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{
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struct rtp_packet_t pkt;
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struct rtp_payload_helper_t *helper;
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helper = (struct rtp_payload_helper_t *)p;
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if (!helper || 0 != rtp_packet_deserialize(&pkt, packet, bytes))
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return -EINVAL;
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rtp_payload_check(helper, &pkt);
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// 2.1 RTP header usage(p4)
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// M bit: Set to 1 whenever the timestamp is discontinuous. (such as
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// might happen when a sender switches from one data
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// source to another).This allows the receiver and any
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// intervening RTP mixers or translators that are synchronizing
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// to the flow to ignore the difference between this timestamp
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// and any previous timestamp in their clock phase detectors.
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if (pkt.rtp.m)
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{
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//TODO: test
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// new frame start
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//helper->size = 0; // discard previous packets
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helper->lost = 1; // notify source changed
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rtp_payload_onframe(helper); // clear previous source data
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}
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rtp_payload_write(helper, &pkt);
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return helper->lost ? 0 : 1; // packet handled
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}
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struct rtp_payload_decode_t *rtp_ts_decode()
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{
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static struct rtp_payload_decode_t decode = {
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rtp_payload_helper_create,
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rtp_payload_helper_destroy,
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rtp_decode_ts,
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};
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return &decode;
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}
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