Add LogcatApplyFiltersMessage.

lib/roles/device.js

@@ -401,6 +401,12 @@ module.exports = function(options) {
           log.error('keyPress failed', err.stack)
         })
     })
+    .on(wire.LogcatApplyFiltersMessage, function(channel, message) {
+      services.logcat.resetFilters().excludeAll()
+      message.filters.forEach(function(filter) {
+        services.logcat.include(filter.tag, filter.priority)
+      })
+    })
     .on(wire.ShellCommandMessage, function(channel, message) {
       log.info('Running shell command "%s"', message.command.join(' '))
       adb.shellAsync(options.serial, message.command)

lib/wire/wire.proto

@@ -26,6 +26,8 @@ enum MessageType {
   KeyUpMessage            = 24;
   KeyPressMessage         = 25;
   DeviceRegisteredMessage = 26;
+  DeviceLogcatEntryMessage  = 27;
+  LogcatApplyFiltersMessage = 28;
 }
 
 message Envelope {
@@ -198,6 +200,27 @@ message KeyPressMessage {
   required uint32 key = 1;
 }
 
+// Output
+
+message DeviceLogcatEntryMessage {
+  required string serial = 1;
+  required double date = 2;
+  required uint32 pid = 3;
+  required uint32 tid = 4;
+  required uint32 priority = 5;
+  required string tag = 6;
+  required string message = 7;
+}
+
+message LogcatFilter {
+  required string tag = 1;
+  required uint32 priority = 2;
+}
+
+message LogcatApplyFiltersMessage {
+  repeated LogcatFilter filters = 1;
+}
+
 // Commands
 
 message ShellCommandMessage {