support load audio codec param and video codec param from merge_av.cfg

@@ -6,6 +6,7 @@
 #include <vector>
 #include <string.h>
 
+
 bool only_print = false;
 using   namespace  std;
 
@@ -214,10 +215,59 @@ int readfile(char * filename)
 	return 0;
 }
 
+#ifdef WIN32
+#include <Windows.h>
+
+char exe_path[MAX_PATH] = { 0 };
+
+int GetExePath()
+{
+	char path_buffer[MAX_PATH] = "";
+	char drive[32] = "";
+	char dir[256] = "";
+	char fname[64] = "";
+	char ext[32] = "";
+
+	GetModuleFileNameA(NULL, path_buffer, 256);
+	_splitpath(path_buffer, drive, dir, fname, ext);
+
+	strcpy(exe_path, drive);
+	strcat(exe_path, dir);
+	return 0;
+}
+#endif
+
 void load_codec_param()
 {
 	strcpy(acodec_param, default_acodec_param);
 	strcpy(vcodec_param, default_vcodec_param);
+
+	char cfgfile[1024];
+#ifdef WIN32
+	GetExePath();
+	strcpy(cfgfile, exe_path);
+#else
+	strcpy(cfgfile , "~/";
+#endif
+	strcat(cfgfile, "merge_av.cfg");
+	ifstream fin(cfgfile);
+	if (!fin) {
+		return;
+	}
+	const int  LINE_LENGTH = 1000;
+	char  str[LINE_LENGTH];
+	str[0] = 0;
+	if (fin.getline(str, LINE_LENGTH))
+	{
+		printf("\nload video codec from %s: %s\n", cfgfile, str);
+		strcpy(vcodec_param, str);
+	}
+	str[0] = 0;
+	if (fin.getline(str, LINE_LENGTH))
+	{
+		printf("load audio codec from %s: %s\n", cfgfile, str);
+		strcpy(acodec_param, str);
+	}
 }
 
 int main(int argc, char * argv[])