Rust screamtx crash when RtpQueue was cleared about scream

[jacobt21]

Pushed the fix.

[jacobt21]

I'll need to test more but the following should work
diff --git a/code/wrapper_lib/screamtx_plugin_wrapper.cpp b/code/wrapper_lib/screamtx_plugin_wrapper.cpp
index 8b0a547..af91ad6 100644
--- a/code/wrapper_lib/screamtx_plugin_wrapper.cpp
+++ b/code/wrapper_lib/screamtx_plugin_wrapper.cpp
@@ -192,7 +192,9 @@ void *transmitRtpThread(void *arg) {
pthread_mutex_lock(&stream->lock_rtp_queue);
stream->rtpQueue->pop(&buf, size, ssrc, seqNr, isMark);
pthread_mutex_unlock(&stream->lock_rtp_queue);

•       stream->cb(stream->cb_data, (uint8_t *)buf, 1);
  

•       if (buf) {
  

•           stream->cb(stream->cb_data, (uint8_t *)buf, 1);
  

•       }
        if ((cur_n_streams > 1) && (sleeps++ < 120)) {
            usleep(500);
        }
  

@@ -601,7 +603,9 @@ int tx_plugin_main(int argc, char* argv[], uint32_t ssrc)
void packet_free(void *buf, uint32_t ssrc)
{
stream_t *stream = getStream(ssrc);

• stream->cb(stream->cb_data, (uint8_t *)buf, 0);

• if (buf) {

•    stream->cb(stream->cb_data, (uint8_t *)buf, 0);
  

• }
  }
  int nn=0;