all: move headers to include folder

Signed-off-by: Mahyar Koshkouei <mk@deltabeard.com>

include/playback.h

@@ -0,0 +1,51 @@
+#include <stdbool.h>
+
+#ifndef ctrmus_playback_h
+#define ctrmus_playback_h
+
+/* Channel to play music on */
+#define CHANNEL	0x08
+
+struct decoder_fn
+{
+	int (* init)(const char* file);
+	uint32_t (* rate)(void);
+	uint8_t (* channels)(void);
+	size_t buffSize;
+	uint64_t (* decode)(void*);
+	void (* exit)(void);
+};
+
+struct playbackInfo_t
+{
+	char*				file;
+	struct errInfo_t*	errInfo;
+};
+
+/**
+ * Pause or play current file.
+ *
+ * \return	True if paused.
+ */
+bool togglePlayback(void);
+
+/**
+ * Stops current playback. Playback thread should exit as a result.
+ */
+void stopPlayback(void);
+
+/**
+ * Returns whether music is playing or paused.
+ */
+bool isPlaying(void);
+
+/**
+ * Should only be called from a new thread only, and have only one playback
+ * thread at time. This function has not been written for more than one
+ * playback thread in mind.
+ *
+ * \param	infoIn	Playback information.
+ */
+void playFile(void* infoIn);
+
+#endif