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niimaqsrc: Add additional metadata to buffers (offset, duration, timestamp)

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This commit is contained in:
Joshua M. Doe 2010-04-23 14:18:09 -04:00
parent 763b869063
commit 1935a8b86e
1 changed files with 18 additions and 5 deletions
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23
sys/gstniimaq.c
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@ -463,6 +463,9 @@ gst_niimaqsrc_init (GstNiImaqSrc * niimaqsrc, GstNiImaqSrcClass * g_class)
/* set source as live (no preroll) */
gst_base_src_set_live (GST_BASE_SRC (niimaqsrc), TRUE);
/* override default of BYTES to operate in time mode */
gst_base_src_set_format (GST_BASE_SRC (niimaqsrc), GST_FORMAT_TIME);
/* initialize member variables */
niimaqsrc->timestamp_offset = 0;
niimaqsrc->caps = NULL;
@ -626,9 +629,9 @@ gst_niimaqsrc_create (GstPushSrc * psrc, GstBuffer ** buffer)
{
GstNiImaqSrc *niimaqsrc = GST_NIIMAQSRC (psrc);
gpointer data;
GstCaps *caps;
GstFlowReturn res = GST_FLOW_OK;
guint i;
GstClock *clock;
uInt32 copied_number;
uInt32 copied_index;
@ -690,14 +693,24 @@ gst_niimaqsrc_create (GstPushSrc * psrc, GstBuffer ** buffer)
}
*buffer = gst_buffer_new ();
GST_BUFFER_DATA (*buffer) = data;
GST_BUFFER_MALLOCDATA (*buffer) = data;
GST_BUFFER_SIZE (*buffer) = niimaqsrc->framesize;
GST_BUFFER_OFFSET (*buffer) = niimaqsrc->cumbufnum;
GST_BUFFER_OFFSET_END (*buffer) = niimaqsrc->cumbufnum;
/* set caps of src pad to buffer */
caps = gst_pad_get_caps (GST_BASE_SRC_PAD (psrc));
gst_buffer_set_caps (*buffer, caps);
gst_caps_unref (caps);
/* use clock time to set buffer timestamp */
clock = gst_element_get_clock (GST_ELEMENT (niimaqsrc));
GST_BUFFER_TIMESTAMP (*buffer) =
GST_CLOCK_DIFF (gst_element_get_base_time (GST_ELEMENT (niimaqsrc)), gst_clock_get_time (clock));
gst_object_unref (clock);
/* make guess of duration from timestamp and cumulative buffer number */
GST_BUFFER_DURATION (*buffer) = GST_BUFFER_TIMESTAMP (*buffer) / (niimaqsrc->cumbufnum + 1);
/* the negotiate() method already set caps on the source pad */
gst_buffer_set_caps (*buffer, GST_PAD_CAPS (GST_BASE_SRC_PAD (niimaqsrc)));
/*GST_BUFFER_TIMESTAMP (outbuf) = src->timestamp_offset + src->running_time;
if (src->rate_numerator != 0) {