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hackrf_transfer: report on only actual transfers

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The statistics reported to the user now reflect only completed USB
transfers and do not include information about the empty buffers that
are preloaded with data at the start of a TX operation.
This commit is contained in:
Michael Ossmann 2022-09-09 16:32:07 -04:00
parent 70a04855ac
commit 8a9af7a1ad
1 changed files with 20 additions and 0 deletions
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20
host/hackrf-tools/src/hackrf_transfer.c
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@ -683,6 +683,7 @@ int main(int argc, char** argv)
unsigned int lna_gain = 8, vga_gain = 20, txvga_gain = 0;
hackrf_m0_state state;
stats_t stats = {0, 0};
static int32_t preload_bytes = 0;
while ((opt =
getopt(argc,
@ -1272,6 +1273,8 @@ int main(int argc, char** argv)
.it_value = {.tv_sec = 1, .tv_usec = 0}};
setitimer(ITIMER_REAL, &interval_timer, NULL);
#endif
preload_bytes = hackrf_get_transfer_queue_depth(device) *
hackrf_get_transfer_buffer_size(device);
while ((hackrf_is_streaming(device) == HACKRF_TRUE) && (do_exit == false)) {
uint64_t byte_count_now;
@ -1324,6 +1327,23 @@ int main(int argc, char** argv)
byte_count = 0;
stream_power = 0;
/*
* The TX callback is called to preload the USB
* transfer buffers at the start of TX. This results in
* invalid statistics collected about the empty buffers
* before any USB transfer is completed. We skip these
* statistics and do not report them to the user.
*/
if (preload_bytes > 0) {
if (preload_bytes > byte_count_now) {
preload_bytes -= byte_count_now;
byte_count_now = 0;
} else {
byte_count_now -= preload_bytes;
preload_bytes = 0;
}
}
time_difference = TimevalDiff(&time_now, &time_start);
rate = (float) byte_count_now / time_difference;
if (byte_count_now == 0 && hw_sync == true &&