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fix videorate decision, add latency offset to v4l

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Original commit message from CVS:
fix videorate decision, add latency offset to v4l
This commit is contained in:
Thomas Vander Stichele 2004-06-26 15:58:35 +00:00
parent e7ec8bcb7a
commit a45f29c44a
4 changed files with 53 additions and 6 deletions
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21
ChangeLog
View file

@ -1,4 +1,23 @@
2004-06-26 set REAL_NAME environment variable <set EMAIL_ADDRESS environment variable>
2004-06-26 Thomas Vander Stichele <thomas at apestaart dot org>
* gst/videorate/gstvideorate.c: (gst_videorate_chain):
fix decision for when getting frames with same timestamp
* sys/v4l/gstv4lsrc.c: (gst_v4lsrc_class_init), (gst_v4lsrc_init),
(gst_v4lsrc_get), (gst_v4lsrc_set_property),
(gst_v4lsrc_get_property):
* sys/v4l/gstv4lsrc.h:
add latency offset property
2004-06-26 Thomas Vander Stichele <thomas at apestaart dot org>
* gst/tcp/gsttcpserversink.c: (gst_tcpserversink_queue_buffer):
* gst/videorate/gstvideorate.c: (gst_videorate_chain):
* sys/v4l/gstv4lsrc.c: (gst_v4lsrc_class_init), (gst_v4lsrc_init),
(gst_v4lsrc_get), (gst_v4lsrc_set_property),
(gst_v4lsrc_get_property):
* sys/v4l/gstv4lsrc.h:
2004-06-26 Thomas Vander Stichele <thomas at apestaart dot org>
* gst/videorate/gstvideorate.c: (gst_videorate_chain),
(plugin_init):

4
gst/videorate/gstvideorate.c
View file

@ -369,7 +369,7 @@ gst_videorate_chain (GstPad * pad, GstData * data)
GST_TIME_ARGS (videorate->next_ts));
/* output first one when its the best */
if (diff1 <= diff2) {
if (diff1 < diff2) {
GstBuffer *outbuf;
count++;
@ -389,7 +389,7 @@ gst_videorate_chain (GstPad * pad, GstData * data)
}
/* continue while the first one was the best */
}
while (diff1 <= diff2);
while (diff1 < diff2);
/* if we outputed the first buffer more then once, we have dups */
if (count > 1) {

33
sys/v4l/gstv4lsrc.c
View file

@ -63,7 +63,8 @@ enum
ARG_BUFSIZE,
ARG_SYNC_MODE,
ARG_COPY_MODE,
ARG_AUTOPROBE
ARG_AUTOPROBE,
ARG_LATENCY_OFFSET
};
GST_FORMATS_FUNCTION (GstPad *, gst_v4lsrc_get_formats,
@ -212,6 +213,10 @@ gst_v4lsrc_class_init (GstV4lSrcClass * klass)
g_param_spec_boolean ("autoprobe", "Autoprobe",
"Whether the device should be probed for all possible features",
TRUE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LATENCY_OFFSET,
g_param_spec_int ("latency-offset", "Latency offset",
"A latency offset subtracted from timestamps set on buffers (in ns)",
G_MININT, G_MAXINT, 0, G_PARAM_READWRITE));
/* signals */
gst_v4lsrc_signals[SIGNAL_FRAME_CAPTURE] =
@ -273,6 +278,8 @@ gst_v4lsrc_init (GstV4lSrc * v4lsrc)
v4lsrc->is_capturing = FALSE;
v4lsrc->autoprobe = TRUE;
v4lsrc->latency_offset = 0;
}
static void
@ -956,9 +963,20 @@ gst_v4lsrc_get (GstPad * pad)
case GST_V4LSRC_SYNC_MODE_CLOCK:
if (v4lsrc->clock) {
GstClockTime time = gst_element_get_time (GST_ELEMENT (v4lsrc));
GstClockTimeDiff target_ts = 0;
/* FIXME: figure out a way to add the capture latency here */
GST_BUFFER_TIMESTAMP (buf) = time /* + 0.5 * GST_SECOND / fps */ ;
/* we can't go negative for timestamps. FIXME: latency querying
* in the core generally should solve this */
target_ts = GST_CLOCK_DIFF (time, v4lsrc->latency_offset);
if (target_ts < 0)
target_ts = 0;
/* FIXME: create GST_TIME_DIFF_ARGS for target_ts */
GST_LOG_OBJECT (v4lsrc, "time: %" GST_TIME_FORMAT
", latency-offset: %" GST_TIME_FORMAT
", timestamp: %" GST_TIME_FORMAT,
GST_TIME_ARGS (time), GST_TIME_ARGS (v4lsrc->latency_offset),
GST_TIME_ARGS (target_ts));
GST_BUFFER_TIMESTAMP (buf) = target_ts;
} else {
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
}
@ -1047,6 +1065,11 @@ gst_v4lsrc_set_property (GObject * object,
}
break;
case ARG_LATENCY_OFFSET:
v4lsrc->latency_offset = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1088,6 +1111,10 @@ gst_v4lsrc_get_property (GObject * object,
g_value_set_boolean (value, v4lsrc->autoprobe);
break;
case ARG_LATENCY_OFFSET:
g_value_set_int (value, v4lsrc->latency_offset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

1
sys/v4l/gstv4lsrc.h
View file

@ -76,6 +76,7 @@ struct _GstV4lSrc
gint num_queued;
gint sync_frame, queue_frame;
gboolean is_capturing;
GstClockTimeDiff latency_offset;
/* True if we want to stop */
gboolean quit;