module-rtp: calculate payload_size based on MTU

The actual payload size depends on the MTU but should not include the
IP/UDP and RTP headers.

Fixes #4396
This commit is contained in:
Wim Taymans 2024-11-11 11:49:20 +01:00
parent 73b5a10021
commit a53bc035c0
4 changed files with 15 additions and 4 deletions

View file

@ -71,6 +71,7 @@ struct impl {
uint32_t ts_offset;
uint32_t psamples;
uint32_t mtu;
uint32_t payload_size;
struct spa_ringbuffer ring;
uint8_t buffer[BUFFER_SIZE];
@ -440,6 +441,11 @@ struct rtp_stream *rtp_stream_new(struct pw_core *core,
impl->payload = pw_properties_get_uint32(props, "rtp.payload", impl->payload);
impl->mtu = pw_properties_get_uint32(props, "net.mtu", DEFAULT_MTU);
if (impl->mtu <= PACKET_HEADER_SIZE) {
pw_log_error("invalid MTU %d, using %d", impl->mtu, DEFAULT_MTU);
impl->mtu = DEFAULT_MTU;
}
impl->payload_size = impl->mtu - PACKET_HEADER_SIZE;
impl->seq = pw_rand32();
@ -477,7 +483,7 @@ struct rtp_stream *rtp_stream_new(struct pw_core *core,
pw_log_warn("rtp.ptime doesn't match rtp.framecount. Choosing rtp.ptime");
}
} else {
impl->psamples = impl->mtu / impl->stride;
impl->psamples = impl->payload_size / impl->stride;
impl->psamples = SPA_CLAMP(impl->psamples, min_samples, max_samples);
if (direction == PW_DIRECTION_INPUT) {
pw_properties_set(props, "rtp.ptime",