win-dshow: Put device id mangling in separate file

This is going to be used for other code as well, so may as well put it
in its own file.

plugins/win-dshow/CMakeLists.txt

@@ -4,6 +4,7 @@ find_package(FFMpeg REQUIRED COMPONENTS avcodec avutil)
 include_directories(${FFMPEG_INCLUDE_DIRS})
 
 set(win-dshow_HEADERS
+	encode-dstr.hpp
 	ffmpeg-decode.h)
 
 set(win-dshow_SOURCES

plugins/win-dshow/encode-dstr.hpp

@@ -0,0 +1,76 @@
+#pragma once
+
+#include <util/util.hpp>
+
+static inline void encode_dstr(struct dstr *str)
+{
+	dstr_replace(str, "#", "#22");
+	dstr_replace(str, ":", "#3A");
+}
+
+static inline void decode_dstr(struct dstr *str)
+{
+	dstr_replace(str, "#3A", ":");
+	dstr_replace(str, "#22", "#");
+}
+
+static inline void EncodeDeviceId(struct dstr *encodedStr,
+		const wchar_t *name_str, const wchar_t *path_str)
+{
+	DStr name;
+	DStr path;
+
+	dstr_from_wcs(name, name_str);
+	dstr_from_wcs(path, path_str);
+
+	encode_dstr(name);
+	encode_dstr(path);
+
+	dstr_copy_dstr(encodedStr, name);
+	dstr_cat(encodedStr, ":");
+	dstr_cat_dstr(encodedStr, path);
+}
+
+static inline bool DecodeDeviceDStr(DStr &name, DStr &path,
+		const char *device_id)
+{
+	const char *path_str;
+
+	if (!device_id || !*device_id)
+		return false;
+
+	path_str = strchr(device_id, ':');
+	if (!path_str)
+		return false;
+
+	dstr_copy(path, path_str+1);
+	dstr_copy(name, device_id);
+
+	size_t len = path_str - device_id;
+	name->array[len] = 0;
+	name->len        = len;
+
+	decode_dstr(name);
+	decode_dstr(path);
+
+	return true;
+}
+
+static inline bool DecodeDeviceId(DShow::DeviceId &out, const char *device_id)
+{
+	DStr name, path;
+
+	if (!DecodeDeviceDStr(name, path, device_id))
+		return false;
+
+	BPtr<wchar_t> wname = dstr_to_wcs(name);
+	out.name = wname;
+
+	if (!dstr_is_empty(path)) {
+		BPtr<wchar_t> wpath = dstr_to_wcs(path);
+		out.path = wpath;
+	}
+
+	return true;
+}
+

plugins/win-dshow/win-dshow.cpp

@@ -3,11 +3,11 @@
 #include <obs-module.h>
 #include <obs.hpp>
 #include <util/dstr.hpp>
-#include <util/util.hpp>
 #include <util/platform.h>
 #include <util/windows/WinHandle.hpp>
 #include "libdshowcapture/dshowcapture.hpp"
 #include "ffmpeg-decode.h"
+#include "encode-dstr.hpp"
 
 #include <algorithm>
 #include <limits>
@@ -317,18 +317,6 @@ static long long FrameRateInterval(const VideoInfo &cap,
 		min(desired_interval, cap.maxInterval);
 }
 
-static inline void encode_dstr(struct dstr *str)
-{
-	dstr_replace(str, "#", "#22");
-	dstr_replace(str, ":", "#3A");
-}
-
-static inline void decode_dstr(struct dstr *str)
-{
-	dstr_replace(str, "#3A", ":");
-	dstr_replace(str, "#22", "#");
-}
-
 static inline video_format ConvertVideoFormat(VideoFormat format)
 {
 	switch (format) {
@@ -496,48 +484,6 @@ void DShowInput::OnAudioData(const AudioConfig &config,
 	UNUSED_PARAMETER(endTime);
 }
 
-static bool DecodeDeviceId(DStr &name, DStr &path, const char *device_id)
-{
-	const char *path_str;
-
-	if (!device_id || !*device_id)
-		return false;
-
-	path_str = strchr(device_id, ':');
-	if (!path_str)
-		return false;
-
-	dstr_copy(path, path_str+1);
-	dstr_copy(name, device_id);
-
-	size_t len = path_str - device_id;
-	name->array[len] = 0;
-	name->len        = len;
-
-	decode_dstr(name);
-	decode_dstr(path);
-
-	return true;
-}
-
-static bool DecodeDeviceId(DeviceId &out, const char *device_id)
-{
-	DStr name, path;
-
-	if (!DecodeDeviceId(name, path, device_id))
-		return false;
-
-	BPtr<wchar_t> wname = dstr_to_wcs(name);
-	out.name = wname;
-
-	if (!dstr_is_empty(path)) {
-		BPtr<wchar_t> wpath = dstr_to_wcs(path);
-		out.path = wpath;
-	}
-
-	return true;
-}
-
 struct PropertiesData {
 	vector<VideoDevice> devices;
 	vector<AudioDevice> audioDevices;
@@ -1032,7 +978,7 @@ static bool ResTypeChanged(obs_properties_t *props, obs_property_t *p,
 static size_t AddDevice(obs_property_t *device_list, const string &id)
 {
 	DStr name, path;
-	if (!DecodeDeviceId(name, path, id.c_str()))
+	if (!DecodeDeviceDStr(name, path, id.c_str()))
 		return numeric_limits<size_t>::max();
 
 	return obs_property_list_add_string(device_list, name, id.c_str());