From 0da22f962fd8ee14d7952b8ffc8fe539dfc3ad63 Mon Sep 17 00:00:00 2001
From: voroshil <voroshil@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sun, 18 Nov 2007 05:20:17 +0000
Subject: [PATCH] Prevent chains from building more than once.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25087 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 stream/tvi_dshow.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/stream/tvi_dshow.c b/stream/tvi_dshow.c
index 4b82f8a2a6..2d115032d9 100644
--- a/stream/tvi_dshow.c
+++ b/stream/tvi_dshow.c
@@ -2411,6 +2411,9 @@ static HRESULT build_video_chain(priv_t *priv)
 {
     HRESULT hr;
 
+    if(priv->v_buf)
+        return S_OK;
+
     if (priv->pVideoStreamConfig) {
 	hr = OLE_CALL_ARGS(priv->pVideoStreamConfig, SetFormat, priv->pmtVideo);
 	if (FAILED(hr)) {
@@ -2447,6 +2450,9 @@ static HRESULT build_audio_chain(priv_t *priv)
 {
     HRESULT hr;
 
+    if(priv->a_buf)
+        return S_OK;
+
     if(priv->immediate_mode)
         return S_OK;
 
@@ -2489,6 +2495,9 @@ static HRESULT build_vbi_chain(priv_t *priv)
 #ifdef HAVE_TV_TELETEXT
     HRESULT hr;
 
+    if(priv->vbi_buf)
+        return S_OK;
+
     if(priv->tv_param->tdevice)
     {
         priv->vbi_buf=calloc(1,sizeof(grabber_ringbuffer_t));