Add --input-res CLI parameter.

- Also set default width and height to 0 because it makes no sense to assume
  dimensions. It's kind of like defaulting to the most common altitude when
  the altimeter is broken.
- Add config_validate to have a place for checks on overall cfg state.

src/config.c

@@ -56,8 +56,8 @@ int config_init(config *cfg)
   cfg->output          = NULL;
   cfg->debug           = NULL;
   cfg->frames          = 0;
-  cfg->width           = 320;
-  cfg->height          = 240;
+  cfg->width           = 0;
+  cfg->height          = 0;
   cfg->qp              = 32;
   cfg->intra_period    = 0;
   cfg->deblock_enable  = 1;
@@ -181,6 +181,11 @@ static int config_parse(config *cfg, const char *name, const char *value)
     cfg->width = atoi(value);
   OPT("height")
     cfg->height = atoi(value);
+  OPT("input-res") {
+    if (2 != sscanf(value, "%dx%d", &cfg->width, &cfg->height)) {
+      cfg->width = cfg->height = 0;
+    }
+  }
   OPT("frames")
     cfg->frames = atoi(value);
   OPT("qp")
@@ -276,11 +281,12 @@ int config_read(config *cfg,int argc, char *argv[])
     { "output",             required_argument, NULL, 'o' },
     { "debug",              required_argument, NULL, 'd' },
     { "width",              required_argument, NULL, 'w' },
-    { "height",             required_argument, NULL, 'h' },
-    { "frames",             required_argument, NULL, 'n' },
+    { "height",             required_argument, NULL, 'h' }, // deprecated
+    { "frames",             required_argument, NULL, 'n' }, // deprecated
     { "qp",                 required_argument, NULL, 'q' },
     { "period",             required_argument, NULL, 'p' },
     { "ref",                required_argument, NULL, 'r' },
+    { "input-res",          required_argument, NULL, 0 },
     { "no-deblock",               no_argument, NULL, 0 },
     { "deblock",            required_argument, NULL, 0 },
     { "no-sao",                   no_argument, NULL, 0 },
@@ -332,3 +338,20 @@ int config_read(config *cfg,int argc, char *argv[])
 
   return 1;
 }
+
+/**
+ * \brief A function that does additional checks after config_init.
+ *
+ * Add checks that don't make sense to have in config_init here.
+ * This should be called when cfg is in it's final state.
+ *
+ * \return 0 if config fails, otherwise 1.
+ */
+int config_validate(config *cfg)
+{
+  if (cfg->width == 0 || cfg->height == 0) {
+    fprintf(stderr, "Input error: one of the dimensions is 0: dims=%dx%d", cfg->width, cfg->height);
+    return 0;
+  }
+  return 1;
+}

src/config.h

@@ -69,5 +69,6 @@ config *config_alloc(void);
 int config_init(config *cfg);
 int config_destroy(config *cfg);
 int config_read(config *cfg,int argc, char *argv[]);
+int config_validate(config *cfg);
 
 #endif

src/encmain.c

@@ -88,11 +88,12 @@ int main(int argc, char *argv[])
 
     fprintf(stderr,
             "Usage:\n"
-            "kvazaar -i <input> -w <width> -h <height> -o <output>\n"
+            "kvazaar -i <input> -w <width> --input-res <width>:<height> -o <output>\n"
             "\n"
             "Optional parameters:\n"
             "      -n, --frames <integer>     : Number of frames to code [all]\n"
             "      --seek <integer>           : First frame to code [0]\n"
+            "      --input-res <int>x<int>    : Input resolution (width x height)\n"
             "      -q, --qp <integer>         : Quantization Parameter [32]\n"
             "      -p, --period <integer>     : Period of intra pictures [0]\n"
             "                                     0: only first picture is intra\n"
@@ -126,7 +127,12 @@ int main(int argc, char *argv[])
             "          --colormatrix <string> : Specify color matrix setting [\"undef\"]\n"
             "                                     - undef, bt709, fcc, bt470bg, smpte170m,\n"
             "                                       smpte240m, GBR, YCgCo, bt2020nc, bt2020c\n"
-            "          --chromaloc <integer>  : Specify chroma sample location (0 to 5) [0]\n");
+            "          --chromaloc <integer>  : Specify chroma sample location (0 to 5) [0]\n"
+            "\n"
+            "  Deprecated parameters: (might be removed at some point)\n"
+            "     Use --input-res:\n"
+            "       -w, --width               : Width of input in pixels\n"
+            "       -h, --height              : Height of input in pixels\n");
 
     if (cfg)
       config_destroy(cfg);
@@ -134,6 +140,12 @@ int main(int argc, char *argv[])
     return EXIT_FAILURE;
   }
 
+  // Do more validation to make sure the parameters we have make sense.
+  if (!config_validate(cfg)) {
+    config_destroy(cfg);
+    return EXIT_FAILURE;
+  }
+
   // Dig CPU features with cpuid
   kvz_cpu_cpuid(&ecx,&edx);
   printf("CPU features enabled: ");