Add an option --map-signal= to override the default signal-to-card mapping.

[nageru] / flags.cpp

diff --git a/flags.cpp b/flags.cpp
index f782c769cbc0329aacce8178c40a08442e03bdbc..7e8beaf84dab139a978b33d9bc1302949419f0d1 100644 (file)
--- a/flags.cpp
+++ b/flags.cpp
@@ -3,6 +3,11 @@
 #include <getopt.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+
+#include <utility>
+
+using namespace std;
 
 Flags global_flags;
 
@@ -15,6 +20,7 @@ void usage()
        fprintf(stderr, "  -t, --theme=FILE                choose theme (default theme.lua)\n");
        fprintf(stderr, "  -v, --va-display=SPEC           VA-API device for H.264 encoding\n");
        fprintf(stderr, "                                    ($DISPLAY spec or /dev/dri/render* path)\n");
+       fprintf(stderr, "  -m, --map-signal=SIGNAL,CARD    set a default card mapping (can be given multiple times)\n");
        fprintf(stderr, "      --http-uncompressed-video   send uncompressed NV12 video to HTTP clients\n");
        fprintf(stderr, "      --http-x264-video           send x264-compressed video to HTTP clients\n");
        fprintf(stderr, "      --x264-preset               x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
@@ -46,6 +52,7 @@ void parse_flags(int argc, char * const argv[])
                { "help", no_argument, 0, 'h' },
                { "num-cards", required_argument, 0, 'c' },
                { "theme", required_argument, 0, 't' },
+               { "map-signal", required_argument, 0, 'm' },
                { "va-display", required_argument, 0, 1000 },
                { "http-uncompressed-video", no_argument, 0, 1001 },
                { "http-x264-video", no_argument, 0, 1008 },
@@ -77,6 +84,23 @@ void parse_flags(int argc, char * const argv[])
                case 't':
                        global_flags.theme_filename = optarg;
                        break;
+               case 'm': {
+                       char *ptr = strchr(optarg, ',');
+                       if (ptr == nullptr) {
+                               fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
+                               exit(1);
+                       }
+                       *ptr = '\0';
+                       const int signal_num = atoi(optarg);
+                       const int card_num = atoi(ptr + 1);
+                       if (global_flags.default_stream_mapping.count(signal_num)) {
+                               fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
+                                       signal_num, global_flags.default_stream_mapping[signal_num]);
+                               exit(1);
+                       }
+                       global_flags.default_stream_mapping[signal_num] = card_num;
+                       break;
+               }
                case 1000:
                        global_flags.va_display = optarg;
                        break;
@@ -138,4 +162,11 @@ void parse_flags(int argc, char * const argv[])
                fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
                exit(1);
        }
+       for (pair<int, int> mapping : global_flags.default_stream_mapping) {
+               if (mapping.second >= global_flags.num_cards) {
+                       fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
+                               mapping.first, mapping.second);
+                       exit(1);
+               }
+       }
 }