yair/gst-plugin-linescan
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

framelinksrc: add non-callback method of getting buffers

Browse Source
This commit is contained in:
Joshua M. Doe 2014-01-15 14:43:52 -05:00
parent 8a814b1006
commit 588b844357
1 changed files with 72 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
sys/imperx/gstframelinksrc.c
View File

@ -461,11 +461,54 @@ unsupported_caps:
return FALSE;
}
void
gst_framelink_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
static GstBuffer *
gst_framelinksrc_create_buffer_from_frameinfo (GstFramelinkSrc * src,
VCECLB_FrameInfoEx * pFrameInfo)
{
GstFramelinkSrc *src = GST_FRAMELINK_SRC (lpUserData);
GstMapInfo minfo;
GstBuffer *buf;
/* TODO: use allocator or use from pool */
buf = gst_buffer_new_and_alloc (src->height * src->gst_stride);
/* Copy image to buffer from surface TODO: use orc_memcpy */
gst_buffer_map (buf, &minfo, GST_MAP_WRITE);
GST_LOG_OBJECT (src,
"GstBuffer size=%d, gst_stride=%d, phx_stride=%d, number=%d, timestamp=%d",
minfo.size, src->gst_stride, src->flex_stride, pFrameInfo->number,
pFrameInfo->timestamp);
if (src->gst_stride == src->flex_stride) {
memcpy (minfo.data, pFrameInfo->lpRawBuffer, minfo.size);
} else {
int i;
GST_WARNING_OBJECT (src,
"Image stride not a multiple of 4, copy will be slower.");
for (i = 0; i < src->height; i++) {
memcpy (minfo.data + i * src->gst_stride,
((guint8 *) pFrameInfo->lpRawBuffer) + i * src->flex_stride,
src->flex_stride);
}
}
gst_buffer_unmap (buf, &minfo);
GST_BUFFER_OFFSET (buf) = pFrameInfo->number;
/* TODO: use timestamp? */
/* GST_BUFFER_OFFSET (src->timestamp) = pFrameInfo->timestamp * G_GINT64_CONSTANT (1000); */
return buf;
}
static void
gst_framelinksrc_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
{
GstFramelinkSrc *src;
return;
printf ("callback, status=%d, buffersize=%d, number=%d, timestamp=%d \n",
pFrameInfo->dma_status, pFrameInfo->bufferSize, pFrameInfo->number,
pFrameInfo->timestamp);
src = GST_FRAMELINK_SRC (lpUserData);
g_assert (src != NULL);
if (pFrameInfo->dma_status == VCECLB_DMA_STATUS_FRAME_DROP) {
/* TODO: save this in dropped frame total? */
@ -485,6 +528,8 @@ gst_framelink_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
return;
}
GST_LOG_OBJECT (src, "callback received for new buffer");
g_mutex_lock (&src->mutex);
if (src->buffer) {
@ -495,33 +540,7 @@ gst_framelink_callback (void *lpUserData, VCECLB_FrameInfoEx * pFrameInfo)
src->buffer = NULL;
}
/* TODO: use allocator or use from pool */
src->buffer = gst_buffer_new_and_alloc (src->height * src->gst_stride);
/* Copy image to buffer from surface TODO: use orc_memcpy */
gst_buffer_map (src->buffer, &minfo, GST_MAP_WRITE);
GST_LOG_OBJECT (src,
"GstBuffer size=%d, gst_stride=%d, phx_stride=%d, number=%d, timestamp=%d",
minfo.size, src->gst_stride, src->flex_stride, pFrameInfo->number,
pFrameInfo->timestamp);
if (src->gst_stride == src->flex_stride) {
memcpy (minfo.data, pFrameInfo->lpRawBuffer, minfo.size);
} else {
int i;
GST_WARNING_OBJECT (src,
"Image stride not a multiple of 4, copy will be slower.");
for (i = 0; i < src->height; i++) {
memcpy (minfo.data + i * src->gst_stride,
((guint8 *) pFrameInfo->lpRawBuffer) + i * src->flex_stride,
src->flex_stride);
}
}
gst_buffer_unmap (src->buffer, &minfo);
GST_BUFFER_OFFSET (src->buffer) = pFrameInfo->number;
/* TODO: use timestamp? */
/* GST_BUFFER_OFFSET (src->timestamp) = pFrameInfo->timestamp * G_GINT64_CONSTANT (1000); */
src->buffer = gst_framelinksrc_create_buffer_from_frameinfo (src, pFrameInfo);
g_cond_signal (&src->cond);
g_mutex_unlock (&src->mutex);
@ -532,12 +551,19 @@ gst_framelinksrc_create (GstPushSrc * psrc, GstBuffer ** buf)
{
GstFramelinkSrc *src = GST_FRAMELINK_SRC (psrc);
VCECLB_Error err;
VCECLB_FrameInfoEx pFrameInfo;
/* Start acquisition if not already started */
if (!src->acq_started) {
#if GST_FRAMELINKSRC_USE_CALLBACK
err =
VCECLB_StartGrabEx (src->grabber, src->channel, 0,
(VCECLB_GrabFrame_CallbackEx) gst_framelinksrc_callback, NULL);
(VCECLB_GrabFrame_CallbackEx) gst_framelinksrc_callback, src);
#else
err =
VCECLB_StartGrabEx (src->grabber, src->channel, 0,
(VCECLB_GrabFrame_CallbackEx) NULL, src);
#endif
if (err != VCECLB_Err_Success) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
("Failed to start grabbing (code %d)", err), (NULL));
@ -545,7 +571,7 @@ gst_framelinksrc_create (GstPushSrc * psrc, GstBuffer ** buf)
}
src->acq_started = TRUE;
}
#if GST_FRAMELINKSRC_USE_CALLBACK
/* wait for a buffer to be ready */
g_mutex_lock (&src->mutex);
while (!src->buffer) {
@ -558,6 +584,20 @@ gst_framelinksrc_create (GstPushSrc * psrc, GstBuffer ** buf)
src->buffer = NULL;
}
g_mutex_unlock (&src->mutex);
#else
pFrameInfo.lpRawBuffer = NULL;
while (pFrameInfo.lpRawBuffer == NULL) {
err = VCECLB_GetLastBufferData (src->grabber, src->channel, &pFrameInfo);
if (err != VCECLB_Err_Success) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
("Failed to get last buffer (code %d)", err), (NULL));
return GST_FLOW_ERROR;
}
}
/* TODO: check for missed frames by comparing pFrameInfo.number */
*buf = gst_framelinksrc_create_buffer_from_frameinfo (src, &pFrameInfo);
#endif
return GST_FLOW_OK;
}