add mod_dub (#16)

* add mod_dub

Signed-off-by: Dave Horton <daveh@beachdognet.com>

* remove some locks

---------

Signed-off-by: Dave Horton <daveh@beachdognet.com>

mod_dub/mod_dub.h

@@ -0,0 +1,59 @@
+#ifndef __MOD_DUB_H__
+#define __MOD_DUB_H__
+
+#include <switch.h>
+#include <speex/speex_resampler.h>
+
+#include <mpg123.h>
+
+#include <unistd.h>
+
+#define MY_BUG_NAME "_dub_"
+#define MAX_SESSION_ID (256)
+#define MAX_BUG_LEN (64)
+#define MAX_URL_LEN (1024)
+#define MAX_DUB_TRACKS (2)
+
+/* per-channel data */
+typedef void (*responseHandler_t)(switch_core_session_t* session, const char* json, const char* bugname, const char* details);
+
+typedef enum {
+  DUB_TRACK_STATE_INACTIVE = 0,
+  DUB_TRACK_STATE_READY,
+  DUB_TRACK_STATE_ACTIVE,
+  DUB_TRACK_STATE_PAUSED
+} dub_state_t;
+
+typedef enum {
+  DUB_GENERATOR_TYPE_UNKNOWN = 0,
+  DUB_GENERATOR_TYPE_HTTP,
+  DUB_GENERATOR_TYPE_FILE,
+  DUB_GENERATOR_TYPE_TTS
+} dub_generator_t;
+
+typedef enum {
+  DUB_TRACK_EVENT_PLAY = 0,
+  DUB_TRACK_EVENT_STOP,
+  DUB_TRACK_EVENT_PAUSE,
+  DUB_TRACK_EVENT_RESUME
+} dub_event_t;
+
+
+typedef struct dub_track {
+  dub_state_t state;
+  dub_generator_t generator;
+  char* trackName;
+  int sampleRate;
+  int gain;
+  void* circularBuffer;
+  int generatorId;
+} dub_track_t;
+
+struct cap_cb {
+	switch_mutex_t *mutex;
+  int gain;
+  dub_track_t tracks[MAX_DUB_TRACKS];
+};
+
+
+#endif