replay_gain: refactor API, move code to replay_gain_state.c

The replay_gain_state struct holds the precalculated scale factor,
which is removed from struct replay_gain_info.

1 files changed, 50 insertions, 0 deletions

diff --git a/src/replay_gain_state.h b/src/replay_gain_state.h
new file mode 100644
index 000000000..7fa476095
--- /dev/null
+++ b/src/replay_gain_state.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2003-2010 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_REPLAY_GAIN_STATE_H
+#define MPD_REPLAY_GAIN_STATE_H
+
+#include "check.h"
+#include "replay_gain.h"
+
+#include <stddef.h>
+
+struct replay_gain_state;
+struct audio_format;
+
+struct replay_gain_state *
+replay_gain_state_new(float preamp, float missing_preamp);
+
+void
+replay_gain_state_free(struct replay_gain_state *state);
+
+void
+replay_gain_state_set_mode(struct replay_gain_state *state,
+			   enum replay_gain_mode mode);
+
+void
+replay_gain_state_set_info(struct replay_gain_state *state,
+			   const struct replay_gain_info *info);
+
+void
+replay_gain_state_apply(const struct replay_gain_state *state,
+			void *buffer, size_t size,
+			const struct audio_format *format);
+
+#endif