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rtmp: Add support for subscribing live streams 

When streaming live streams using the Akamai, Edgecast or Limelight CDN,
players cannot simply connect to the live stream. Instead, they have to
subscribe to it, by sending an FC Subscribe call to the server.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Samuel Pitoiset 2012-08-07 21:51:46 +02:00 committed by Martin Storsjö
parent 12127b65b0
commit f9e77c1762
1 changed files with 31 additions and 0 deletions
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31
libavformat/rtmpproto.c
View File

@ -604,6 +604,29 @@ static int gen_bytes_read(URLContext *s, RTMPContext *rt, uint32_t ts)
return ret;
}
static int gen_fcsubscribe_stream(URLContext *s, RTMPContext *rt)
{
RTMPPacket pkt;
uint8_t *p;
int ret;
if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
0, 27 + strlen(rt->playpath))) < 0)
return ret;
p = pkt.data;
ff_amf_write_string(&p, "FCSubscribe");
ff_amf_write_number(&p, ++rt->nb_invokes);
ff_amf_write_null(&p);
ff_amf_write_string(&p, rt->playpath);
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size,
rt->prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
return ret;
}
int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap,
const uint8_t *key, int keylen, uint8_t *dst)
{
@ -1011,6 +1034,14 @@ static int handle_invoke(URLContext *s, RTMPPacket *pkt)
}
if ((ret = gen_create_stream(s, rt)) < 0)
return ret;
if (rt->is_input) {
/* Send the FCSubscribe command if live stream. */
if (rt->live == -1) {
if ((ret = gen_fcsubscribe_stream(s, rt)) < 0)
return ret;
}
}
break;
case STATE_FCPUBLISH:
rt->state = STATE_CONNECTING;