ao_coreaudio: move channel mapping code to a separate file

Move all of the channel map retrieval/negotiation code to a separate
file. This will (probably) be helpful when extending
ao_coreaudio_exclusive.c.

Nothing else changes, other than some minor cosmetics and renaming,
and changing some details for decoupling it from the ao_coreaudio.c
internals.

1 files changed, 25 insertions, 0 deletions

diff --git a/audio/out/ao_coreaudio_chmap.h b/audio/out/ao_coreaudio_chmap.h
new file mode 100644
index 0000000000..ce31975b6d
--- /dev/null
+++ b/audio/out/ao_coreaudio_chmap.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv 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.
+ *
+ * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MPV_COREAUDIO_CHMAP_H
+#define MPV_COREAUDIO_CHMAP_H
+
+#include <AudioToolbox/AudioToolbox.h>
+
+bool ca_init_chmap(struct ao *ao, AudioDeviceID device);
+
+#endif