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rtmp: Allocate the prev_pkt arrays dynamically

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Normally, all channel ids are between 0 and 10, while they in
uncommon cases can have values up to 64k.

This avoids allocating two arrays for up to 64k entries (at a total
of over 6 MB in size) each when most of them aren't used at all.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö
2013-10-11 22:16:04 +03:00
parent 39185ec4fa
commit 84a125c4c2
3 changed files with 92 additions and 28 deletions
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48
libavformat/rtmpproto.c
View File

@@ -77,7 +77,8 @@ typedef struct TrackedMethod {
typedef struct RTMPContext {
const AVClass *class;
URLContext* stream; ///< TCP stream used in interactions with RTMP server
RTMPPacket prev_pkt[2][RTMP_CHANNELS]; ///< packet history used when reading and sending packets ([0] for reading, [1] for writing)
RTMPPacket *prev_pkt[2]; ///< packet history used when reading and sending packets ([0] for reading, [1] for writing)
int nb_prev_pkt[2]; ///< number of elements in prev_pkt
int in_chunk_size; ///< size of the chunks incoming RTMP packets are divided into
int out_chunk_size; ///< size of the chunks outgoing RTMP packets are divided into
int is_input; ///< input/output flag
@@ -238,7 +239,7 @@ static int rtmp_send_packet(RTMPContext *rt, RTMPPacket *pkt, int track)
}
ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
fail:
ff_rtmp_packet_destroy(pkt);
return ret;
@@ -408,7 +409,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
GetByteContext gbc;
if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size,
rt->prev_pkt[0])) < 0)
&rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0)
return ret;
cp = pkt.data;
bytestream2_init(&gbc, cp, pkt.size);
@@ -444,7 +445,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
bytestream_put_be32(&p, rt->server_bw);
pkt.size = p - pkt.data;
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
if (ret < 0)
return ret;
@@ -457,7 +458,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
bytestream_put_byte(&p, 2); // dynamic
pkt.size = p - pkt.data;
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
if (ret < 0)
return ret;
@@ -471,7 +472,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
bytestream_put_be16(&p, 0); // 0 -> Stream Begin
bytestream_put_be32(&p, 0);
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
if (ret < 0)
return ret;
@@ -484,7 +485,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
p = pkt.data;
bytestream_put_be32(&p, rt->out_chunk_size);
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
if (ret < 0)
return ret;
@@ -519,7 +520,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
pkt.size = p - pkt.data;
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
if (ret < 0)
return ret;
@@ -534,7 +535,7 @@ static int read_connect(URLContext *s, RTMPContext *rt)
ff_amf_write_number(&p, 8192);
pkt.size = p - pkt.data;
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&pkt);
return ret;
@@ -1455,7 +1456,7 @@ static int handle_chunk_size(URLContext *s, RTMPPacket *pkt)
/* Send the same chunk size change packet back to the server,
* setting the outgoing chunk size to the same as the incoming one. */
if ((ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size,
rt->prev_pkt[1])) < 0)
&rt->prev_pkt[1], &rt->nb_prev_pkt[1])) < 0)
return ret;
rt->out_chunk_size = AV_RB32(pkt->data);
}
@@ -1784,7 +1785,7 @@ static int write_begin(URLContext *s)
bytestream2_put_be32(&pbc, rt->nb_streamid);
ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&spkt);
@@ -1831,7 +1832,7 @@ static int write_status(URLContext *s, RTMPPacket *pkt,
spkt.size = pp - spkt.data;
ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&spkt);
return ret;
@@ -1932,7 +1933,7 @@ static int send_invoke_response(URLContext *s, RTMPPacket *pkt)
}
spkt.size = pp - spkt.data;
ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
rt->prev_pkt[1]);
&rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
ff_rtmp_packet_destroy(&spkt);
return ret;
}
@@ -2262,7 +2263,8 @@ static int get_packet(URLContext *s, int for_header)
for (;;) {
RTMPPacket rpkt = { 0 };
if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt,
rt->in_chunk_size, rt->prev_pkt[0])) <= 0) {
rt->in_chunk_size, &rt->prev_pkt[0],
&rt->nb_prev_pkt[0])) <= 0) {
if (ret == 0) {
return AVERROR(EAGAIN);
} else {
@@ -2343,9 +2345,11 @@ static int rtmp_close(URLContext *h)
}
if (rt->state > STATE_HANDSHAKED)
ret = gen_delete_stream(h, rt);
for (i = 0; i < 2; i++)
for (j = 0; j < RTMP_CHANNELS; j++)
for (i = 0; i < 2; i++) {
for (j = 0; j < rt->nb_prev_pkt[i]; j++)
ff_rtmp_packet_destroy(&rt->prev_pkt[i][j]);
av_freep(&rt->prev_pkt[i]);
}
free_tracked_methods(rt);
av_freep(&rt->flv_data);
@@ -2562,11 +2566,14 @@ reconnect:
goto fail;
if (rt->do_reconnect) {
int i;
ffurl_close(rt->stream);
rt->stream = NULL;
rt->do_reconnect = 0;
rt->nb_invokes = 0;
memset(rt->prev_pkt, 0, sizeof(rt->prev_pkt));
for (i = 0; i < 2; i++)
memset(rt->prev_pkt[i], 0,
sizeof(**rt->prev_pkt) * rt->nb_prev_pkt[i]);
free_tracked_methods(rt);
goto reconnect;
}
@@ -2687,6 +2694,10 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
pkttype == RTMP_PT_NOTIFY) {
if (pkttype == RTMP_PT_NOTIFY)
pktsize += 16;
if ((ret = ff_rtmp_check_alloc_array(&rt->prev_pkt[1],
&rt->nb_prev_pkt[1],
channel)) < 0)
return ret;
rt->prev_pkt[1][channel].channel_id = 0;
}
@@ -2747,7 +2758,8 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
if ((ret = ff_rtmp_packet_read_internal(rt->stream, &rpkt,
rt->in_chunk_size,
rt->prev_pkt[0], c)) <= 0)
&rt->prev_pkt[0],
&rt->nb_prev_pkt[0], c)) <= 0)
return ret;
if ((ret = rtmp_parse_result(s, rt, &rpkt)) < 0)