add config option for beast dump compression level

Author: wiedehopf

help.h

@@ -102,7 +102,7 @@ static struct argp_option optionsReadsb[] = {
     {"write-state-only-on-exit", OptStateOnlyOnExit, 0, 0, "Don't continously update state.", 1},
     {"heatmap-dir", OptHeatmapDir, "<dir>", 0, "Change the directory where heatmaps are saved (default is in globe history dir)", 1},
     {"heatmap", OptHeatmap, "<interval in seconds>", 0, "Make Heatmap, each aircraft at most every interval seconds (creates historydir/heatmap.bin and exit after that)", 1},
-    {"dump-beast", OptDumpBeastDir, "<dir>,<interval>", 0, "Dump compressed beast files to this directory, start a new file evey interval seconds", 1},
+    {"dump-beast", OptDumpBeastDir, "<dir>,<interval>,<compressionLevel>", 0, "Dump compressed beast files to this directory, start a new file evey interval seconds", 1},
     {"write-json-every", OptJsonTime, "<sec>", 0, "Write json output and update API json every sec seconds (default 1)", 1},
     {"json-location-accuracy", OptJsonLocAcc , "<n>", 0, "Accuracy of receiver location in json metadata: 0=no location, 1=approximate, 2=exact", 1},
     {"write-json-globe-index", OptJsonGlobeIndex, 0, 0, "Write specially indexed globe_xxxx.json files (for tar1090)", 1},

readsb.c

@@ -233,6 +233,7 @@ static void configSetDefaults(void) {
 
     // in seconds, default to 1 hour
     Modes.dump_interval = 60 * 60;
+    Modes.dump_compressionLevel = 4;
 
 
     Modes.ping_reduce = PING_REDUCE;
@@ -1757,6 +1758,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
                 sfree(Modes.dump_beast_dir);
                 Modes.dump_beast_dir = strdup(token[0]);
                 if (token[1]) { Modes.dump_interval = atoi(token[1]); }
+                if (token[2]) { Modes.dump_compressionLevel = atoi(token[2]); }
                 // enable networking as this is required
                 Modes.net = 1;
 

readsb.h

@@ -821,6 +821,7 @@ struct _Modes
     int32_t dump_interval;
     int32_t dump_beast_index;
     uint64_t dump_lastReceiverId;
+    int8_t dump_compressionLevel;
     int8_t writeTraces;
     int8_t dump_reduce; // only dump beast that would be sent out according to reduce_interval
     int8_t state_only_on_exit;

util.c

@@ -1126,7 +1126,7 @@ void dump_beast_check(int64_t now) {
     }
 
     // start new file
-    zstdFwStartFile(fw, pathbuf, 4);
+    zstdFwStartFile(fw, pathbuf, Modes.dump_compressionLevel);
 
     //fprintf(stderr, "dump_beast started file: %s\n", pathbuf);
 }