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imperxflexsrc: recover from disrupted signals and better accounting of dropped frames

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This commit is contained in:
Joshua M. Doe 2016-07-08 11:52:49 -04:00
parent e876660438
commit 425994d8fb
2 changed files with 31 additions and 19 deletions
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47
sys/imperx/gstframelinksrc.c
View File

@ -156,8 +156,6 @@ gst_framelinksrc_reset (GstFramelinkSrc * src)
{
g_assert_null (src->grabber);
src->dropped_frame_count = 0;
src->last_buffer_number = 0;
src->acq_started = FALSE;
if (src->caps) {
@ -636,9 +634,14 @@ static void __stdcall
gst_framelinksrc_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
{
GstFramelinkSrc *src = GST_FRAMELINK_SRC (lpUserData);
guint dropped_frames;
gint dropped_frames;
static guint64 last_frame_number = 0;
static guint64 buffers_processed = 0;
static guint64 total_dropped_frames = 0;
g_assert (src != NULL);
/* check for DMA errors */
if (pFrameInfo->dma_status == VCECLB_DMA_STATUS_FRAME_DROP) {
/* TODO: save this in dropped frame total? */
GST_WARNING_OBJECT (src, "Frame dropped from DMA system.");
@ -657,6 +660,23 @@ gst_framelinksrc_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
return;
}
/* check for dropped frames and disrupted signal */
dropped_frames = (pFrameInfo->number - last_frame_number) - 1;
if (dropped_frames > 0) {
total_dropped_frames += dropped_frames;
GST_WARNING_OBJECT (src, "Dropped %d frames (%d total)", dropped_frames,
total_dropped_frames);
} else if (dropped_frames < 0) {
GST_WARNING_OBJECT (src,
"Signal disrupted, frames likely dropped and timestamps inaccurate");
/* frame timestamps reset, so adjust start time, accuracy reduced */
src->acq_start_time =
gst_clock_get_time (gst_element_get_clock (GST_ELEMENT (src))) -
pFrameInfo->timestamp * GST_USECOND;
}
last_frame_number = pFrameInfo->number;
g_mutex_lock (&src->mutex);
if (src->buffer) {
@ -669,21 +689,11 @@ gst_framelinksrc_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
src->buffer = gst_framelinksrc_create_buffer_from_frameinfo (src, pFrameInfo);
/* number always starts at one for IMPERX, zero for GStreamer */
GST_BUFFER_OFFSET (src->buffer) = pFrameInfo->number - 1;
/* TODO: this isn't quite right, I think */
GST_BUFFER_TIMESTAMP (src->buffer) =
GST_ELEMENT_CAST (src)->base_time +
(pFrameInfo->timestamp * G_GINT64_CONSTANT (1000));
dropped_frames = pFrameInfo->number - src->last_buffer_number - 1;
if (dropped_frames > 0) {
src->dropped_frame_count += dropped_frames;
GST_WARNING_OBJECT (src, "Dropped %d frames (%d total)", dropped_frames,
src->dropped_frame_count);
}
src->last_buffer_number = pFrameInfo->number;
GST_CLOCK_DIFF (gst_element_get_base_time (GST_ELEMENT (src)),
src->acq_start_time + pFrameInfo->timestamp * GST_USECOND);
GST_BUFFER_OFFSET (src->buffer) = buffers_processed;
++buffers_processed;
g_cond_signal (&src->cond);
g_mutex_unlock (&src->mutex);
@ -701,9 +711,12 @@ gst_framelinksrc_create (GstPushSrc * psrc, GstBuffer ** buf)
/* Start acquisition if not already started */
if (G_UNLIKELY (!src->acq_started)) {
GST_LOG_OBJECT (src, "starting acquisition");
src->acq_start_time =
gst_clock_get_time (gst_element_get_clock (GST_ELEMENT (src)));
err =
VCECLB_StartGrabEx (src->grabber, src->channel, 0,
gst_framelinksrc_callback, src);
if (err != VCECLB_Err_Success) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
("Failed to start grabbing (code %d)", err), (NULL));

3
sys/imperx/gstframelinksrc.h
View File

@ -43,8 +43,6 @@ struct _GstFramelinkSrc
{
GstPushSrc base_framelinksrc;
guint last_buffer_number;
gint dropped_frame_count;
gboolean acq_started;
/* camera handle */
@ -58,6 +56,7 @@ struct _GstFramelinkSrc
gint timeout;
GstBuffer *buffer;
GstClockTime acq_start_time;
GstCaps *caps;
gint height;