wip: add support for experimental knobs

Change-Id: I51a0a80877be9784a7b161b4a17604d3922f3aef

examples.mk

@@ -35,6 +35,7 @@ vpxenc.SRCS                 += vpx_ports/mem_ops_aligned.h
 vpxenc.SRCS                 += libmkv/EbmlIDs.h
 vpxenc.SRCS                 += libmkv/EbmlWriter.c
 vpxenc.SRCS                 += libmkv/EbmlWriter.h
+vpxenc.SRCS                 += experimental.c
 vpxenc.GUID                  = 548DEC74-7A15-4B2B-AFC3-AA102E7C25C1
 vpxenc.DESCRIPTION           = Full featured encoder
 

experimental.c

@@ -0,0 +1,29 @@
+#define EXPERIMENTAL_C
+#include <stdio.h>
+
+#include "args.h"
+
+/* Get argument definitions */
+#include "experimental.h"
+
+/* Build argument definition list */
+static const arg_def_t *xxx_def_list[] = {
+#include "experimental.h"
+NULL
+};
+
+void xxx_show_usage(FILE *fp)
+{
+    arg_show_usage(fp, xxx_def_list);
+}
+
+int xxx_parse_arg(char **argi)
+{
+    struct arg arg;
+
+    arg = arg_init(argi);
+    if(0);
+#include "experimental.h"
+    else return 0;
+    return 1;
+}

experimental.h

@@ -0,0 +1,56 @@
+#if defined(EXPERIMENTAL_C)
+/* The experimental.c file includes this file multiple times to build up the
+ * required state.
+ */
+#if !defined(XXX_ARG_DEF)
+#define XXX_ARG_DEF(sym, value) \
+    static const arg_def_t xxx_arg_def_##sym = \
+        ARG_DEF(NULL, #sym, 1, "Experimental");
+
+#define XXX_DEFINE_INT(sym, value) \
+    XXX_ARG_DEF(sym, value); int xxx_##sym = value;
+#define XXX_DEFINE_UINT(sym, value) \
+    XXX_ARG_DEF(sym, value); unsigned int xxx_##sym = value;
+
+#elif !defined(XXX_ARG_DEF_LIST)
+#define XXX_ARG_DEF_LIST(sym) &xxx_arg_def_##sym,
+
+#undef  XXX_DEFINE_INT
+#define XXX_DEFINE_INT(sym, value) XXX_ARG_DEF_LIST(sym)
+
+#undef  XXX_DEFINE_UINT
+#define XXX_DEFINE_UINT(sym, value) XXX_ARG_DEF_LIST(sym)
+
+#elif !defined(XXX_ARG_MATCH)
+#define XXX_ARG_MATCH
+
+#undef  XXX_DEFINE_INT
+#define XXX_DEFINE_INT(sym, value)\
+    else if (arg_match(&arg, &xxx_arg_def_##sym, argi)) \
+        xxx_##sym = arg_parse_int(&arg);
+
+#undef  XXX_DEFINE_UINT
+#define XXX_DEFINE_UINT(sym, value)\
+    else if (arg_match(&arg, &xxx_arg_def_##sym, argi)) \
+        xxx_##sym = arg_parse_uint(&arg);
+
+#endif
+#else
+/* All other files just get the extern references to these symbols. */
+
+#define XXX_DEFINE_INT(sym, value) extern int xxx_##sym;
+#define XXX_DEFINE_UINT(sym, value) extern unsigned int xxx_##sym;
+
+
+#include <stdio.h>
+void xxx_show_usage(FILE *fp);
+int xxx_parse_arg(char **argi);
+#endif
+
+/*
+ * BEGIN EXPERIMENTS BELOW
+ *
+ * XXX_DEFINE_INT(knob, 0)
+ */
+XXX_DEFINE_INT(foo, 0)
+XXX_DEFINE_INT(bar, 0)

vpxenc.c

@@ -39,6 +39,7 @@
 #include "y4minput.h"
 #include "libmkv/EbmlWriter.h"
 #include "libmkv/EbmlIDs.h"
+#include "experimental.h"
 
 /* Need special handling of these functions on Windows */
 #if defined(_MSC_VER)
@@ -1039,6 +1040,7 @@ static void usage_exit()
 #if CONFIG_VP8_ENCODER
     fprintf(stderr, "\nVP8 Specific Options:\n");
     arg_show_usage(stdout, vp8_args);
+    xxx_show_usage(stdout);
 #endif
     fprintf(stderr, "\n"
            "Included encoders:\n"
@@ -1173,6 +1175,7 @@ int main(int argc, const char **argv_)
             out_fn = arg.val;
         else if (arg_match(&arg, &debugmode, argi))
             ebml.debug = 1;
+        else if (xxx_parse_arg(argi));
         else
             argj++;
     }