hls support multiple publish/unpublish. disable hls when not support

@@ -126,16 +126,16 @@ Supported operating systems and hardware:
 16. support live stream transcoding by ffmpeg.<br/>
 17. support live stream transcoding by ffmpeg.<br/>
 18. support ffmpeg filters(logo/overlay/crop), x264 params.<br/>
-19. [plan] support network based cli and json result.<br/>
-20. [plan] support http callback api hooks(for authentication).<br/>
-21. [plan] support bandwidth test api and flash client.<br/>
-22. [plan] support adobe flash refer/token/swf verification.<br/>
-23. [plan] support adobe amf3 codec.<br/>
-24. [plan] support dvr(record live to vod file)<br/>
-25. [plan] support FMS edge protocol<br/>
-26. [plan] support encryption: RTMPE/RTMPS, HLS DRM<br/>
-27. [plan] support RTMPT, http to tranverse firewalls<br/>
-28. [plan] support audio transcode only, speex to aac<br/>
+19. [dev] support audio transcode only, speex/mp3 to aac<br/>
+20. [plan] support network based cli and json result.<br/>
+21. [plan] support http callback api hooks(for authentication).<br/>
+22. [plan] support bandwidth test api and flash client.<br/>
+23. [plan] support adobe flash refer/token/swf verification.<br/>
+24. [plan] support adobe amf3 codec.<br/>
+25. [plan] support dvr(record live to vod file)<br/>
+26. [plan] support FMS edge protocol<br/>
+27. [plan] support encryption: RTMPE/RTMPS, HLS DRM<br/>
+28. [plan] support RTMPT, http to tranverse firewalls<br/>
 29. [plan] support file source, transcoding file to live stream<br/>
 
 ### Performance

@@ -1138,6 +1138,11 @@ SrsHls::~SrsHls()
 int SrsHls::on_publish(SrsRequest* req)
 {
 	int ret = ERROR_SUCCESS;
+	
+	// support multiple publish.
+	if (hls_enabled) {
+		return ret;
+	}
 
 	std::string vhost = req->vhost;
 	std::string stream = req->stream;
@@ -1194,6 +1199,11 @@ void SrsHls::on_unpublish()
 {
 	int ret = ERROR_SUCCESS;
 	
+	// support multiple unpublish.
+	if (!hls_enabled) {
+		return;
+	}
+	
 	// close muxer when unpublish.
 	ret = ts_cache->flush_audio(muxer);
 	ret += muxer->segment_close();

@@ -508,8 +508,13 @@ int SrsSource::on_audio(SrsCommonMessage* audio)
 	
 #ifdef SRS_HLS
 	if ((ret = hls->on_audio(msg->copy())) != ERROR_SUCCESS) {
-		srs_error("hls process audio message failed. ret=%d", ret);
-		return ret;
+		srs_warn("hls process audio message failed, ignore and disable hls. ret=%d", ret);
+		
+		// unpublish, ignore ret.
+		hls->on_unpublish();
+		
+		// ignore.
+		ret = ERROR_SUCCESS;
 	}
 #endif
 	
@@ -570,8 +575,13 @@ int SrsSource::on_video(SrsCommonMessage* video)
 	
 #ifdef SRS_HLS
 	if ((ret = hls->on_video(msg->copy())) != ERROR_SUCCESS) {
-		srs_error("hls process video message failed. ret=%d", ret);
-		return ret;
+		srs_warn("hls process video message failed, ignore and disable hls. ret=%d", ret);
+		
+		// unpublish, ignore ret.
+		hls->on_unpublish();
+		
+		// ignore.
+		ret = ERROR_SUCCESS;
 	}
 #endif