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gst/rtpmanager/gstrtpbin.*: Remove a lot of per stream state that is not needed and pass new info in the method call.

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Original commit message from CVS:
* gst/rtpmanager/gstrtpbin.c: (get_client),
(gst_rtp_bin_reset_sync), (gst_rtp_bin_associate),
(gst_rtp_bin_handle_sync), (create_stream),
(gst_rtp_bin_class_init), (new_ssrc_pad_found):
* gst/rtpmanager/gstrtpbin.h:
Remove a lot of per stream state that is not needed and pass new info in
the method call.
Add signal to reset sync parameters.
Avoid parsing the caps to get a clock_base, we get this from the sync
signal now.
This commit is contained in:
Wim Taymans 2008-11-26 11:44:37 +00:00 committed by Tim-Philipp Müller
parent b8408946b7
commit a2d7487ee1
2 changed files with 67 additions and 66 deletions
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132
gst/rtpmanager/gstrtpbin.c
View file

@ -221,6 +221,7 @@ enum
{
SIGNAL_REQUEST_PT_MAP,
SIGNAL_CLEAR_PT_MAP,
SIGNAL_RESET_SYNC,
SIGNAL_GET_INTERNAL_SESSION,
SIGNAL_ON_NEW_SSRC,
@ -302,22 +303,10 @@ struct _GstRtpBinStream
gulong demux_ptreq_sig;
gulong demux_pt_change_sig;
/* data for the RTCP sync signal */
/* if we have calculated a valid unix_delta for this stream */
gboolean have_sync;
guint64 last_unix;
guint64 last_extrtptime;
/* mapping to local RTP and NTP time */
guint64 local_rtp;
guint64 local_unix;
gint64 unix_delta;
/* for lip-sync */
guint64 last_clock_base;
guint64 clock_base;
guint64 clock_base_time;
gint clock_rate;
gint64 ts_offset;
};
#define GST_RTP_SESSION_LOCK(sess) g_mutex_lock ((sess)->lock)
@ -373,8 +362,6 @@ struct _GstRtpBinClient
/* the streams */
guint nstreams;
GSList *streams;
gint64 min_delta;
};
/* find a session with the given id. Must be called with RTP_BIN_LOCK */
@ -792,7 +779,6 @@ get_client (GstRtpBin * bin, guint8 len, guint8 * data, gboolean * created)
result = g_new0 (GstRtpBinClient, 1);
result->cname = g_strndup ((gchar *) data, len);
result->cname_len = len;
result->min_delta = G_MAXINT64;
bin->clients = g_slist_prepend (bin->clients, result);
GST_DEBUG_OBJECT (bin, "created new client %p with CNAME %s", result,
result->cname);
@ -808,16 +794,43 @@ free_client (GstRtpBinClient * client)
g_free (client);
}
static void
gst_rtp_bin_reset_sync (GstRtpBin * rtpbin)
{
GSList *clients, *streams;
GST_DEBUG_OBJECT (rtpbin, "Reset sync on all clients");
GST_RTP_BIN_LOCK (rtpbin);
for (clients = rtpbin->clients; clients; clients = g_slist_next (clients)) {
GstRtpBinClient *client = (GstRtpBinClient *) clients->data;
/* reset sync on all streams for this client */
for (streams = client->streams; streams; streams = g_slist_next (streams)) {
GstRtpBinStream *stream = (GstRtpBinStream *) streams->data;
/* make use require a new SR packet for this stream before we attempt new
* lip-sync */
stream->have_sync = FALSE;
stream->unix_delta = 0;
}
}
GST_RTP_BIN_UNLOCK (rtpbin);
}
/* associate a stream to the given CNAME. This will make sure all streams for
* that CNAME are synchronized together.
* Must be called with GST_RTP_BIN_LOCK */
static void
gst_rtp_bin_associate (GstRtpBin * bin, GstRtpBinStream * stream, guint8 len,
guint8 * data)
guint8 * data, guint64 last_unix, guint64 last_extrtptime,
guint64 clock_base, guint64 clock_base_time, guint clock_rate)
{
GstRtpBinClient *client;
gboolean created;
GSList *walk;
guint64 local_unix;
guint64 local_rtp;
/* first find or create the CNAME */
client = get_client (bin, len, data, &created);
@ -845,29 +858,28 @@ gst_rtp_bin_associate (GstRtpBin * bin, GstRtpBinStream * stream, guint8 len,
/* take the extended rtptime we found in the SR packet and map it to the
* local rtptime. The local rtp time is used to construct timestamps on the
* buffers. */
stream->local_rtp = stream->last_extrtptime - stream->clock_base;
local_rtp = last_extrtptime - clock_base;
GST_DEBUG_OBJECT (bin,
"base %" G_GUINT64_FORMAT ", extrtptime %" G_GUINT64_FORMAT
", local RTP %" G_GUINT64_FORMAT ", clock-rate %d", stream->clock_base,
stream->last_extrtptime, stream->local_rtp, stream->clock_rate);
", local RTP %" G_GUINT64_FORMAT ", clock-rate %d", clock_base,
last_extrtptime, local_rtp, clock_rate);
/* calculate local NTP time in gstreamer timestamp, we essentially perform the
* same conversion that a jitterbuffer would use to convert an rtp timestamp
* into a corresponding gstreamer timestamp. */
stream->local_unix =
gst_util_uint64_scale_int (stream->local_rtp, GST_SECOND,
stream->clock_rate);
stream->local_unix += stream->clock_base_time;
local_unix = gst_util_uint64_scale_int (local_rtp, GST_SECOND, clock_rate);
local_unix += clock_base_time;
/* calculate delta between server and receiver. last_unix is created by
* converting the ntptime in the last SR packet to a gstreamer timestamp. This
* delta expresses the difference to our timeline and the server timeline. */
stream->unix_delta = stream->last_unix - stream->local_unix;
stream->unix_delta = last_unix - local_unix;
stream->have_sync = TRUE;
GST_DEBUG_OBJECT (bin,
"local UNIX %" G_GUINT64_FORMAT ", remote UNIX %" G_GUINT64_FORMAT
", delta %" G_GINT64_FORMAT, stream->local_unix, stream->last_unix,
stream->unix_delta);
", delta %" G_GINT64_FORMAT, local_unix, last_unix, stream->unix_delta);
/* recalc inter stream playout offset, but only if there is more than one
* stream. */
@ -900,7 +912,7 @@ gst_rtp_bin_associate (GstRtpBin * bin, GstRtpBinStream * stream, guint8 len,
/* calculate offsets for each stream */
for (walk = client->streams; walk; walk = g_slist_next (walk)) {
GstRtpBinStream *ostream = (GstRtpBinStream *) walk->data;
gint64 prev_ts_offset;
gint64 ts_offset, prev_ts_offset;
/* ignore streams for which we didn't receive an SR packet yet, we
* can't synchronize them yet. We can however sync other streams just
@ -910,33 +922,32 @@ gst_rtp_bin_associate (GstRtpBin * bin, GstRtpBinStream * stream, guint8 len,
/* calculate offset to our reference stream, this should always give a
* positive number. */
ostream->ts_offset = ostream->unix_delta - min;
ts_offset = ostream->unix_delta - min;
g_object_get (ostream->buffer, "ts-offset", &prev_ts_offset, NULL);
/* delta changed, see how much */
if (prev_ts_offset != ostream->ts_offset) {
if (prev_ts_offset != ts_offset) {
gint64 diff;
if (prev_ts_offset > ostream->ts_offset)
diff = prev_ts_offset - ostream->ts_offset;
if (prev_ts_offset > ts_offset)
diff = prev_ts_offset - ts_offset;
else
diff = ostream->ts_offset - prev_ts_offset;
diff = ts_offset - prev_ts_offset;
GST_DEBUG_OBJECT (bin,
"ts-offset %" G_GUINT64_FORMAT ", prev %" G_GUINT64_FORMAT
", diff: %" G_GINT64_FORMAT, ostream->ts_offset, prev_ts_offset,
diff);
", diff: %" G_GINT64_FORMAT, ts_offset, prev_ts_offset, diff);
/* only change diff when it changed more than 4 milliseconds. This
* compensates for rounding errors in NTP to RTP timestamp
* conversions */
if (diff > 4 * GST_MSECOND && diff < (3 * GST_SECOND)) {
g_object_set (ostream->buffer, "ts-offset", ostream->ts_offset, NULL);
g_object_set (ostream->buffer, "ts-offset", ts_offset, NULL);
}
}
GST_DEBUG_OBJECT (bin, "stream SSRC %08x, delta %" G_GINT64_FORMAT,
ostream->ssrc, ostream->ts_offset);
ostream->ssrc, ts_offset);
}
}
return;
@ -1032,15 +1043,10 @@ gst_rtp_bin_handle_sync (GstElement * jitterbuffer, GstStructure * s,
if (type == GST_RTCP_SDES_CNAME) {
GST_RTP_BIN_LOCK (bin);
/* store values in the stream */
stream->have_sync = TRUE;
stream->last_unix = gst_rtcp_ntp_to_unix (ntptime);
stream->last_extrtptime = extrtptime;
stream->clock_base = clock_base;
stream->clock_base_time = clock_base_time;
stream->clock_rate = clock_rate;
/* associate the stream to CNAME */
gst_rtp_bin_associate (bin, stream, len, data);
gst_rtp_bin_associate (bin, stream, len, data,
gst_rtcp_ntp_to_unix (ntptime), extrtptime,
clock_base, clock_base_time, clock_rate);
GST_RTP_BIN_UNLOCK (bin);
}
}
@ -1075,9 +1081,8 @@ create_stream (GstRtpBinSession * session, guint32 ssrc)
stream->session = session;
stream->buffer = buffer;
stream->demux = demux;
stream->last_extrtptime = -1;
stream->clock_rate = -1;
stream->have_sync = FALSE;
stream->unix_delta = 0;
session->streams = g_slist_prepend (session->streams, stream);
/* provide clock_rate to the jitterbuffer when needed */
@ -1222,6 +1227,19 @@ gst_rtp_bin_class_init (GstRtpBinClass * klass)
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstRtpBinClass,
clear_pt_map), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE,
0, G_TYPE_NONE);
/**
* GstRtpBin::reset-sync:
* @rtpbin: the object which received the signal
*
* Reset all currently configured lip-sync parameters and require new SR
* packets for all streams before lip-sync is attempted again.
*/
gst_rtp_bin_signals[SIGNAL_RESET_SYNC] =
g_signal_new ("reset-sync", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstRtpBinClass,
reset_sync), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE,
0, G_TYPE_NONE);
/**
* GstRtpBin::get-internal-session:
* @rtpbin: the object which received the signal
@ -1404,6 +1422,7 @@ gst_rtp_bin_class_init (GstRtpBinClass * klass)
gstbin_class->handle_message = GST_DEBUG_FUNCPTR (gst_rtp_bin_handle_message);
klass->clear_pt_map = GST_DEBUG_FUNCPTR (gst_rtp_bin_clear_pt_map);
klass->reset_sync = GST_DEBUG_FUNCPTR (gst_rtp_bin_reset_sync);
klass->get_internal_session =
GST_DEBUG_FUNCPTR (gst_rtp_bin_get_internal_session);
@ -1881,7 +1900,6 @@ new_ssrc_pad_found (GstElement * element, guint ssrc, GstPad * pad,
GstRtpBinStream *stream;
GstPad *sinkpad, *srcpad;
gchar *padname;
GstCaps *caps;
rtpbin = session->bin;
@ -1897,24 +1915,6 @@ new_ssrc_pad_found (GstElement * element, guint ssrc, GstPad * pad,
if (!stream)
goto no_stream;
/* get the caps of the pad, we need the clock-rate and base_time if any. */
if ((caps = gst_pad_get_caps (pad))) {
const GstStructure *s;
guint val;
GST_DEBUG_OBJECT (rtpbin, "pad has caps %" GST_PTR_FORMAT, caps);
s = gst_caps_get_structure (caps, 0);
stream->last_clock_base = -1;
if (gst_structure_get_uint (s, "clock-base", &val))
stream->clock_base = val;
else
stream->clock_base = -1;
gst_caps_unref (caps);
}
/* get pad and link */
GST_DEBUG_OBJECT (rtpbin, "linking jitterbuffer RTP");
padname = g_strdup_printf ("src_%d", ssrc);

1
gst/rtpmanager/gstrtpbin.h
View file

@ -69,6 +69,7 @@ struct _GstRtpBinClass {
/* action signals */
void (*clear_pt_map) (GstRtpBin *rtpbin);
void (*reset_sync) (GstRtpBin *rtpbin);
RTPSession* (*get_internal_session) (GstRtpBin *rtpbin, guint session_id);
/* session manager signals */