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rtsp: Lazily set up the pollfd array once

This commit is contained in:
Luca Barbato 2017-02-20 02:16:28 +01:00
parent d8f36a6aa3
commit 79331df362
2 changed files with 27 additions and 27 deletions
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53
libavformat/rtsp.c
View File

@ -1913,7 +1913,6 @@ static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
RTSPState *rt = s->priv_data;
RTSPStream *rtsp_st;
int n, i, ret, tcp_fd, timeout_cnt = 0;
int max_p = 0;
struct pollfd *p = rt->p;
int *fds = NULL, fdsnum, fdsidx;
@ -1921,33 +1920,33 @@ static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
p = rt->p = av_malloc_array(2 * (rt->nb_rtsp_streams + 1), sizeof(struct pollfd));
if (!p)
return AVERROR(ENOMEM);
}
if (rt->rtsp_hd) {
tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
p[max_p].fd = tcp_fd;
p[max_p++].events = POLLIN;
} else {
tcp_fd = -1;
}
for (i = 0; i < rt->nb_rtsp_streams; i++) {
rtsp_st = rt->rtsp_streams[i];
if (rtsp_st->rtp_handle) {
if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
&fds, &fdsnum)) {
av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
return ret;
if (rt->rtsp_hd) {
tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
p[rt->max_p].fd = tcp_fd;
p[rt->max_p++].events = POLLIN;
} else {
tcp_fd = -1;
}
for (i = 0; i < rt->nb_rtsp_streams; i++) {
rtsp_st = rt->rtsp_streams[i];
if (rtsp_st->rtp_handle) {
if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
&fds, &fdsnum)) {
av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
return ret;
}
if (fdsnum != 2) {
av_log(s, AV_LOG_ERROR,
"Number of fds %d not supported\n", fdsnum);
return AVERROR_INVALIDDATA;
}
for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
p[rt->max_p].fd = fds[fdsidx];
p[rt->max_p++].events = POLLIN;
}
av_free(fds);
}
if (fdsnum != 2) {
av_log(s, AV_LOG_ERROR,
"Number of fds %d not supported\n", fdsnum);
return AVERROR_INVALIDDATA;
}
for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
p[max_p].fd = fds[fdsidx];
p[max_p++].events = POLLIN;
}
av_free(fds);
}
}
@ -1956,7 +1955,7 @@ static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
return AVERROR_EXIT;
if (wait_end && wait_end - av_gettime_relative() < 0)
return AVERROR(EAGAIN);
n = poll(p, max_p, POLL_TIMEOUT_MS);
n = poll(p, rt->max_p, POLL_TIMEOUT_MS);
if (n > 0) {
int j = 1 - (tcp_fd == -1);
timeout_cnt = 0;

1
libavformat/rtsp.h
View File

@ -352,6 +352,7 @@ typedef struct RTSPState {
* Polling array for udp
*/
struct pollfd *p;
int max_p;
/**
* Whether the server supports the GET_PARAMETER method.