obs-output module: Fill out more functions

- Add start/stop code to obs-output module

 - Use a circular buffer for the buffered encoder packets instead of a
   dynamic array

 - Add pthreads.lib as a dependency to obs-output module on windows in
   visual studio project files

 - Fix an windows export bug for avc parsing functions on windows.
   Also, rename those functions to be more consistent with each other.

 - Make outputs use a single function for encoded data rather than
   multiple functions

 - Add the ability to make 'text' properties be passworded

libobs/obs-avc.h

@@ -17,13 +17,23 @@
 
 #pragma once
 
+#include "util/c99defs.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct encoder_packet;
 
 /* Helpers for parsing AVC NAL units.  */
 
-const uint8_t *obs_avc_find_startcode(const uint8_t *p, const uint8_t *end);
-
-EXPORT void obs_create_avc_packet(struct encoder_packet *avc_packet,
-		struct encoder_packet *src);
-EXPORT size_t obs_create_avc_header(uint8_t **header, const uint8_t *data,
+EXPORT const uint8_t *obs_avc_find_startcode(const uint8_t *p,
+		const uint8_t *end);
+EXPORT void obs_parse_avc_packet(struct encoder_packet *avc_packet,
+		const struct encoder_packet *src);
+EXPORT size_t obs_parse_avc_header(uint8_t **header, const uint8_t *data,
 		size_t size);
+
+#ifdef __cplusplus
+}
+#endif