From e2bc6dc546da8c7c31aae0d6b6c1351b2ac3e305 Mon Sep 17 00:00:00 2001
From: Marco Bascetta <address@hidden>
Date: Tue, 28 Aug 2018 09:44:00 +0200
Subject: [PATCH] audiofilters/alsa: open write handler on preprocess

---
 src/audiofilters/alsa.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/src/audiofilters/alsa.c b/src/audiofilters/alsa.c
index e071d482..a189dc6e 100644
--- a/src/audiofilters/alsa.c
+++ b/src/audiofilters/alsa.c
@@ -1134,6 +1134,18 @@ void alsa_write_init(MSFilter *obj){
 	obj->data=ad;
 }
 
+void alsa_write_preprocess(MSFilter *obj){
+	AlsaWriteData *ad=(AlsaWriteData*)obj->data;
+
+	if (ad->handle==NULL && ad->pcmdev!=NULL && !ad->write_started) {
+		ad->write_started=TRUE;
+		ad->handle=alsa_open_w(ad->pcmdev,16,ad->nchannels==2,ad->rate);
+#ifdef EPIPE_BUGFIX
+		alsa_fill_w (ad->handle);
+#endif
+	}
+}
+
 void alsa_write_postprocess(MSFilter *obj){
 	AlsaReadData *ad=(AlsaReadData*)obj->data;
 	if (ad->handle!=NULL) snd_pcm_close(ad->handle);
@@ -1181,13 +1193,6 @@ void alsa_write_process(MSFilter *obj){
 	int size;
 	int samples;
 	int err;
-	if (ad->handle==NULL && ad->pcmdev!=NULL && !ad->write_started){
-		ad->write_started=TRUE;
-		ad->handle=alsa_open_w(ad->pcmdev,16,ad->nchannels==2,ad->rate);
-#ifdef EPIPE_BUGFIX
-		alsa_fill_w (ad->handle);
-#endif
-	}
 	if (ad->handle==NULL) {
 		ms_queue_flush(obj->inputs[0]);
 		return;
@@ -1221,6 +1226,7 @@ MSFilterDesc alsa_write_desc={
 	.ninputs=1,
 	.noutputs=0,
 	.init=alsa_write_init,
+	.preprocess=alsa_write_preprocess,
 	.process=alsa_write_process,
 	.postprocess=alsa_write_postprocess,
 	.uninit=alsa_write_uninit,
-- 
2.11.0