output: close device on play error

When an output plugin fails to play a chunk, close it.  This replaces
various manual close() calls in nearly all plugins.

src/output/alsa_plugin.c

@@ -412,7 +412,6 @@ alsa_playAudio(void *data, const char *playChunk, size_t size)
 				ERROR("closing ALSA device \"%s\" due to write "
 				      "error: %s\n", ad->device,
 				      snd_strerror(-errno));
-				alsa_closeDevice(ad);
 				return false;
 			}
 			continue;

src/output/ao_plugin.c

@@ -224,7 +224,6 @@ audioOutputAo_play(void *data, const char *playChunk, size_t size)
 		if (ao_play_deconst(ad->device, playChunk, chunk_size) == 0) {
 			audioOutputAo_error();
 			ERROR("closing audio device due to write error\n");
-			audioOutputAo_closeDevice(ad);
 			return false;
 		}
 

src/output/fifo_plugin.c

@@ -259,7 +259,6 @@ fifo_playAudio(void *data, const char *playChunk, size_t size)
 
 			ERROR("Closing FIFO output \"%s\" due to write error: "
 			      "%s\n", fd->path, strerror(errno));
-			fifo_closeDevice(fd);
 			return false;
 		}
 

src/output/mvp_plugin.c

@@ -253,7 +253,6 @@ mvp_playAudio(void *data, const char *playChunk, size_t size)
 				continue;
 			ERROR("closing mvp PCM device due to write error: "
 			      "%s\n", strerror(errno));
-			mvp_closeDevice(md);
 			return false;
 		}
 		playChunk += ret;

src/output/oss_plugin.c

@@ -549,7 +549,6 @@ oss_playAudio(void *data, const char *playChunk, size_t size)
 				continue;
 			ERROR("closing oss device \"%s\" due to write error: "
 			      "%s\n", od->device, strerror(errno));
-			oss_closeDevice(od);
 			return false;
 		}
 		playChunk += ret;

src/output/shout_plugin.c

@@ -525,7 +525,6 @@ my_shout_play(void *data, const char *chunk, size_t size)
 	if (!sd->opened) {
 		status = open_shout_conn(sd);
 		if (status < 0) {
-			my_shout_close_device(sd);
 			return false;
 		} else if (status > 0) {
 			timer_sync(sd->timer);
@@ -533,15 +532,11 @@ my_shout_play(void *data, const char *chunk, size_t size)
 		}
 	}
 
-	if (sd->encoder->encode_func(sd, chunk, size)) {
-		my_shout_close_device(sd);
+	if (sd->encoder->encode_func(sd, chunk, size))
 		return false;
-	}
 
-	if (write_page(sd) < 0) {
-		my_shout_close_device(sd);
+	if (write_page(sd) < 0)
 		return false;
-	}
 
 	return true;
 }

src/output_thread.c

@@ -62,6 +62,11 @@ static void ao_play(struct audio_output *ao)
 		convertAudioFormat(ao, &data, &size);
 
 	ao->result = ao->plugin->play(ao->data, data, size);
+	if (!ao->result) {
+		ao->plugin->close(ao->data);
+		ao->open = false;
+	}
+
 	ao_command_finished(ao);
 }