demo: Properly handle low samplerates

[libsigrok.git] / src / hardware / demo / api.c

diff --git a/src/hardware/demo/api.c b/src/hardware/demo/api.c
index 5c1543cb1113229ff7849eaa8d4b1352ef9dff70..c5259b286144621d6f763ec611b7045df7ab49f2 100644 (file)
--- a/src/hardware/demo/api.c
+++ b/src/hardware/demo/api.c
@@ -400,6 +400,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 
        devc = sdi->priv;
        devc->sent_samples = 0;
+       devc->sent_frame_samples = 0;
 
        /*
         * Determine the numbers of logic and analog channels that are
@@ -453,6 +454,9 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 
        std_session_send_df_header(sdi);
 
+       if (SAMPLES_PER_FRAME > 0)
+               std_session_send_frame_begin(sdi);
+
        /* We use this timestamp to decide how many more samples to send. */
        devc->start_us = g_get_monotonic_time();
        devc->spent_us = 0;
@@ -464,6 +468,10 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 {
        sr_session_source_remove(sdi->session, -1);
+
+       if (SAMPLES_PER_FRAME > 0)
+               std_session_send_frame_end(sdi);
+
        std_session_send_df_end(sdi);
 
        return SR_OK;