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rtsp: Use a dynamically allocated receive buffer

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Originally committed as revision 25288 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Martin Storsjö 2010-10-01 17:41:31 +00:00
parent 6705dd5f98
commit 96a7c9753e
2 changed files with 15 additions and 5 deletions
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17
libavformat/rtsp.c
View File

@ -53,6 +53,7 @@ int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
#define READ_PACKET_TIMEOUT_S 10
#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_TIMEOUT_MS
#define SDP_MAX_SIZE 16384
#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
static void get_word_until_chars(char *buf, int buf_size,
const char *sep, const char **pp)
@ -498,6 +499,7 @@ void ff_rtsp_close_streams(AVFormatContext *s)
av_close_input_stream (rt->asf_ctx);
rt->asf_ctx = NULL;
}
av_free(rt->recvbuf);
}
static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
@ -1794,7 +1796,6 @@ static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
{
RTSPState *rt = s->priv_data;
int ret, len;
uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
RTSPStream *rtsp_st;
if (rt->nb_byes == rt->nb_rtsp_streams)
@ -1817,16 +1818,22 @@ static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
/* read next RTP packet */
redo:
if (!rt->recvbuf) {
rt->recvbuf = av_malloc(RECVBUF_SIZE);
if (!rt->recvbuf)
return AVERROR(ENOMEM);
}
switch(rt->lower_transport) {
default:
#if CONFIG_RTSP_DEMUXER
case RTSP_LOWER_TRANSPORT_TCP:
len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
len = tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
break;
#endif
case RTSP_LOWER_TRANSPORT_UDP:
case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
break;
@ -1836,9 +1843,9 @@ static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
if (len == 0)
return AVERROR_EOF;
if (rt->transport == RTSP_TRANSPORT_RDT) {
ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, rt->recvbuf, len);
} else {
ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, rt->recvbuf, len);
if (ret < 0) {
/* Either bad packet, or a RTCP packet. Check if the
* first_rtcp_ntp_time field was initialized. */

3
libavformat/rtsp.h
View File

@ -309,6 +309,9 @@ typedef struct RTSPState {
* An EOF is propagated back if nb_byes == nb_streams.
* This is reset after a seek. */
int nb_byes;
/** Reusable buffer for receiving packets */
uint8_t* recvbuf;
} RTSPState;
/**