C++ (Cpp) tv_difference Examples

Example #1

File: glfs-bm.c Project: wangevan/glusterfs

void
measure (int (*func)(struct state *state),
         char *func_name, struct state *state)
{
        struct timeval tv_start, tv_stop, tv_diff;
        state->io_size = 0;
        long int count;

        gettimeofday (&tv_start, NULL);
        count = func (state);
        gettimeofday (&tv_stop, NULL);

        tv_difference (&tv_stop, &tv_start, &tv_diff);

        fprintf (stdout, "%s: count=%ld, size=%ld, time=%ld:%ld\n",
                 func_name, count, state->io_size,
                 tv_diff.tv_sec, tv_diff.tv_usec);
}

Example #2

File: rtp_proxy.c Project: techniker/openBSC

/* encode and send a rtp frame */
int rtp_send_frame(struct rtp_socket *rs, struct gsm_data_frame *frame)
{
	struct rtp_sub_socket *rss = &rs->rtp;
	struct msgb *msg;
	struct rtp_hdr *rtph;
	int payload_type;
	int payload_len;
	int duration; /* in samples */

	if (rs->tx_action != RTP_SEND_DOWNSTREAM) {
		/* initialize sequences */
		rs->tx_action = RTP_SEND_DOWNSTREAM;
		rs->transmit.ssrc = rand();
		rs->transmit.sequence = random();
		rs->transmit.timestamp = random();
	}

	switch (frame->msg_type) {
	case GSM_TCHF_FRAME:
		payload_type = RTP_PT_GSM_FULL;
		payload_len = 33;
		duration = 160;
		break;
	case GSM_TCHF_FRAME_EFR:
		payload_type = RTP_PT_GSM_EFR;
		payload_len = 31;
		duration = 160;
		break;
	default:
		DEBUGPC(DMUX, "unsupported message type %d\n",
			frame->msg_type);
		return -EINVAL;
	}

	{
		struct timeval tv, tv_diff;
		long int usec_diff, frame_diff;

		gettimeofday(&tv, NULL);
		tv_difference(&tv_diff, &rs->transmit.last_tv, &tv);
		rs->transmit.last_tv = tv;

		usec_diff = tv_diff.tv_sec * 1000000 + tv_diff.tv_usec;
		frame_diff = (usec_diff / 20000);

		if (abs(frame_diff) > 1) {
			long int frame_diff_excess = frame_diff - 1;

			LOGP(DMUX, LOGL_NOTICE,
				"Correcting frame difference of %ld frames\n", frame_diff_excess);
			rs->transmit.sequence += frame_diff_excess;
			rs->transmit.timestamp += frame_diff_excess * duration;
		}
	}

	msg = msgb_alloc(sizeof(struct rtp_hdr) + payload_len, "RTP-GSM-FULL");
	if (!msg)
		return -ENOMEM;
	rtph = (struct rtp_hdr *)msg->data;
	rtph->version = RTP_VERSION;
	rtph->padding = 0;
	rtph->extension = 0;
	rtph->csrc_count = 0;
	rtph->marker = 0;
	rtph->payload_type = payload_type;
	rtph->sequence = htons(rs->transmit.sequence++);
	rtph->timestamp = htonl(rs->transmit.timestamp);
	rs->transmit.timestamp += duration;
	rtph->ssrc = htonl(rs->transmit.ssrc);
	memcpy(msg->data + sizeof(struct rtp_hdr), frame->data, payload_len);
	msgb_put(msg, sizeof(struct rtp_hdr) + payload_len);
	msgb_enqueue(&rss->tx_queue, msg);
	rss->bfd.when |= BSC_FD_WRITE;

	return 0;
}