From b15735ae7de59e0d9db43f23388d8ac47a6d2def Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Sun, 17 Oct 2010 11:45:57 +0200
Subject: [PATCH] vss: Let the transport specify whether periodic headers are
 necessary.

This adds the new flag need_periodic_header to struct fec_client_parms. It is
true for the UDP transport and false for the DCCP transport.

vss checks this flag in need_audio_header() and does not send the header
periodically if the flag is false.
---
 command.c   | 1 +
 dccp_send.c | 1 +
 http_send.c | 1 +
 send.h      | 2 ++
 server.c    | 1 +
 udp_send.c  | 2 ++
 vss.c       | 8 ++++++--
 7 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/command.c b/command.c
index 1ca5db3c..664d2573 100644
--- a/command.c
+++ b/command.c
@@ -13,6 +13,7 @@
 #include <dirent.h>
 #include <openssl/rc4.h>
 #include <osl.h>
+#include <stdbool.h>
 
 #include "para.h"
 #include "error.h"
diff --git a/dccp_send.c b/dccp_send.c
index a2ee0270..38e4b7c8 100644
--- a/dccp_send.c
+++ b/dccp_send.c
@@ -145,6 +145,7 @@ static void dccp_post_select(fd_set *rfds, __a_unused fd_set *wfds)
 	dfc->fcp.slices_per_group	= conf.dccp_slices_per_group_arg;
 	dfc->fcp.init_fec		= dccp_init_fec;
 	dfc->fcp.send_fec		= dccp_send_fec;
+	dfc->fcp.need_periodic_header   = false;
 	dfc->fc = vss_add_fec_client(sc, &dfc->fcp);
 }
 
diff --git a/http_send.c b/http_send.c
index e376c464..d5c6397e 100644
--- a/http_send.c
+++ b/http_send.c
@@ -10,6 +10,7 @@
 #include <sys/types.h>
 #include <dirent.h>
 #include <osl.h>
+#include <stdbool.h>
 
 #include "para.h"
 #include "error.h"
diff --git a/send.h b/send.h
index 2201bebf..52f7a10d 100644
--- a/send.h
+++ b/send.h
@@ -131,6 +131,8 @@ struct fec_client_parms {
 	uint8_t slices_per_group;
 	/** Number of slices minus number of redundant slices. */
 	uint8_t data_slices_per_group;
+	/** Whether the header must be sent periodically. */
+	bool need_periodic_header;
 	/**
 	 * Transport-layer initialisation for FEC support.
 	 *
diff --git a/server.c b/server.c
index 48ef55e8..11397d02 100644
--- a/server.c
+++ b/server.c
@@ -68,6 +68,7 @@
 #include <openssl/rc4.h>
 #include <regex.h>
 #include <osl.h>
+#include <stdbool.h>
 
 #include "para.h"
 #include "error.h"
diff --git a/udp_send.c b/udp_send.c
index 0343feb6..7d4f1c79 100644
--- a/udp_send.c
+++ b/udp_send.c
@@ -14,6 +14,7 @@
 #include <netinet/udp.h>
 #include <net/if.h>
 #include <osl.h>
+#include <stdbool.h>
 
 #include "server.cmdline.h"
 #include "para.h"
@@ -344,6 +345,7 @@ static int udp_com_add(struct sender_command_data *scd)
 	ut->fcp.data_slices_per_group = scd->data_slices_per_group;
 	ut->fcp.init_fec	      = udp_init_fec;
 	ut->fcp.send_fec	      = udp_send_fec;
+	ut->fcp.need_periodic_header  = true;
 
 	sc->private_data = ut;
 	sc->fd = -1;
diff --git a/vss.c b/vss.c
index 96b2ba9e..8c16c958 100644
--- a/vss.c
+++ b/vss.c
@@ -227,8 +227,12 @@ static bool need_audio_header(struct fec_client *fc, struct vss_task *vsst)
 		return false;
 	if (vsst->header_len == 0)
 		return false;
-	if (fc->group.num && tv_diff(&fc->next_header_time, now, NULL) > 0)
-		return false;
+	if (fc->group.num > 0) {
+		if (!fc->fcp->need_periodic_header)
+			return false;
+		if (tv_diff(&fc->next_header_time, now, NULL) > 0)
+			return false;
+	}
 	tv_add(now, &vsst->header_interval, &fc->next_header_time);
 	return true;
 }
-- 
2.39.5