decoder/Thread: move decoder_thread_start() into DecoderControl

src/decoder/DecoderControl.hxx

@@ -178,6 +178,14 @@ struct DecoderControl final : InputStreamHandler {
 		       const ReplayGainConfig &_replay_gain_config) noexcept;
 	~DecoderControl() noexcept;
 
+	/**
+	 * Throws on error.
+	 */
+	void StartThread() {
+		quit = false;
+		thread.Start();
+	}
+
 	/**
 	 * Locks the object.
 	 */

src/decoder/DecoderThread.cxx

@@ -18,7 +18,6 @@
  */
 
 #include "config.h"
-#include "DecoderThread.hxx"
 #include "DecoderControl.hxx"
 #include "Bridge.hxx"
 #include "DecoderError.hxx"
@@ -565,12 +564,3 @@ DecoderControl::RunThread() noexcept
 		}
 	} while (command != DecoderCommand::NONE || !quit);
 }
-
-void
-decoder_thread_start(DecoderControl &dc)
-{
-	assert(!dc.thread.IsDefined());
-
-	dc.quit = false;
-	dc.thread.Start();
-}

src/decoder/DecoderThread.hxx

@@ -1,28 +0,0 @@
-/*
- * Copyright 2003-2017 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef MPD_DECODER_THREAD_HXX
-#define MPD_DECODER_THREAD_HXX
-
-struct DecoderControl;
-
-void
-decoder_thread_start(DecoderControl &dc);
-
-#endif