diff --git a/targets/ARCH/tcp_bridge/tcp_bridge_oai.c b/targets/ARCH/tcp_bridge/tcp_bridge_oai.c index 4d7d49d9c7836c800430afc56d033a9fb8a921cd..32fddb9c2dcffcb811fdbe4136c3da45fa5e0be0 100644 --- a/targets/ARCH/tcp_bridge/tcp_bridge_oai.c +++ b/targets/ARCH/tcp_bridge/tcp_bridge_oai.c @@ -44,6 +44,7 @@ typedef struct { int sock; int samples_per_subframe; uint64_t timestamp; + uint64_t next_tx_timestamp; int is_enb; } tcp_bridge_state_t; @@ -141,11 +142,27 @@ int tcp_bridge_write(openair0_device *device, openair0_timestamp timestamp, void { if (cc != 1) { printf("tcp_bridge: only 1 antenna supported\n"); exit(1); } tcp_bridge_state_t *t = device->priv; + /* deal with discontinuities in output (think: eNB in TDD mode) */ + if (t->next_tx_timestamp && timestamp != t->next_tx_timestamp) { + uint32_t b[4096]; + uint64_t to_send = timestamp - t->next_tx_timestamp; + memset(b, 0, 4096 * sizeof(uint32_t)); + while (to_send) { + int len = to_send > 4096 ? 4096 : to_send; + int n = fullwrite(t->sock, b, len * 4); + if (n != len * 4) { + printf("tcp_bridge: write error ret %d error %s\n", n, strerror(errno)); + abort(); + } + to_send -= len; + } + } int n = fullwrite(t->sock, buff[0], nsamps * 4); if (n != nsamps * 4) { printf("tcp_bridge: write error ret %d (wanted %d) error %s\n", n, nsamps*4, strerror(errno)); abort(); } + t->next_tx_timestamp = timestamp + nsamps; return nsamps; }