decoder_*: convert to C++

src/DecoderInternal.hxx

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2003-2013 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_INTERNAL_HXX
+#define MPD_DECODER_INTERNAL_HXX
+
+#include "decoder_command.h"
+#include "pcm_convert.h"
+#include "replay_gain_info.h"
+
+struct input_stream;
+
+struct decoder {
+	struct decoder_control *dc;
+
+	struct pcm_convert_state conv_state;
+
+	/**
+	 * The time stamp of the next data chunk, in seconds.
+	 */
+	double timestamp;
+
+	/**
+	 * Is the initial seek (to the start position of the sub-song)
+	 * pending, or has it been performed already?
+	 */
+	bool initial_seek_pending;
+
+	/**
+	 * Is the initial seek currently running?  During this time,
+	 * the decoder command is SEEK.  This flag is set by
+	 * decoder_get_virtual_command(), when the virtual SEEK
+	 * command is generated for the first time.
+	 */
+	bool initial_seek_running;
+
+	/**
+	 * This flag is set by decoder_seek_where(), and checked by
+	 * decoder_command_finished().  It is used to clean up after
+	 * seeking.
+	 */
+	bool seeking;
+
+	/**
+	 * The tag from the song object.  This is only used for local
+	 * files, because we expect the stream server to send us a new
+	 * tag each time we play it.
+	 */
+	struct tag *song_tag;
+
+	/** the last tag received from the stream */
+	struct tag *stream_tag;
+
+	/** the last tag received from the decoder plugin */
+	struct tag *decoder_tag;
+
+	/** the chunk currently being written to */
+	struct music_chunk *chunk;
+
+	struct replay_gain_info replay_gain_info;
+
+	/**
+	 * A positive serial number for checking if replay gain info
+	 * has changed since the last check.
+	 */
+	unsigned replay_gain_serial;
+
+#ifdef __cplusplus
+	decoder(decoder_control *_dc, bool _initial_seek_pending)
+		:dc(_dc),
+		 initial_seek_pending(_initial_seek_pending),
+		 initial_seek_running(false) {}
+#endif
+};
+
+/**
+ * Returns the current chunk the decoder writes to, or allocates a new
+ * chunk if there is none.
+ *
+ * @return the chunk, or NULL if we have received a decoder command
+ */
+struct music_chunk *
+decoder_get_chunk(struct decoder *decoder);
+
+/**
+ * Flushes the current chunk.
+ */
+void
+decoder_flush_chunk(struct decoder *decoder);
+
+#endif