avconv: add -cpuflags option for setting supported cpuflags.

Useful for testing.

avconv.c

@@ -4397,6 +4397,67 @@ static int opt_deinterlace(const char *opt, const char *arg)
     return 0;
 }
 
+static int opt_cpuflags(const char *opt, const char *arg)
+{
+#define CPUFLAG_MMX2     (AV_CPU_FLAG_MMX      | AV_CPU_FLAG_MMX2)
+#define CPUFLAG_3DNOW    (AV_CPU_FLAG_3DNOW    | AV_CPU_FLAG_MMX)
+#define CPUFLAG_3DNOWEXT (AV_CPU_FLAG_3DNOWEXT | CPUFLAG_3DNOW)
+#define CPUFLAG_SSE      (AV_CPU_FLAG_SSE      | CPUFLAG_MMX2)
+#define CPUFLAG_SSE2     (AV_CPU_FLAG_SSE2     | CPUFLAG_SSE)
+#define CPUFLAG_SSE2SLOW (AV_CPU_FLAG_SSE2SLOW | CPUFLAG_SSE2)
+#define CPUFLAG_SSE3     (AV_CPU_FLAG_SSE3     | CPUFLAG_SSE2)
+#define CPUFLAG_SSE3SLOW (AV_CPU_FLAG_SSE3SLOW | CPUFLAG_SSE3)
+#define CPUFLAG_SSSE3    (AV_CPU_FLAG_SSSE3    | CPUFLAG_SSE3)
+#define CPUFLAG_SSE4     (AV_CPU_FLAG_SSE4     | CPUFLAG_SSSE3)
+#define CPUFLAG_SSE42    (AV_CPU_FLAG_SSE42    | CPUFLAG_SSE4)
+#define CPUFLAG_AVX      (AV_CPU_FLAG_AVX      | CPUFLAG_SSE42)
+#define CPUFLAG_XOP      (AV_CPU_FLAG_XOP      | CPUFLAG_AVX)
+#define CPUFLAG_FMA4     (AV_CPU_FLAG_FMA4     | CPUFLAG_AVX)
+    static const AVOption cpuflags_opts[] = {
+        { "flags"   , NULL, 0, AV_OPT_TYPE_FLAGS, { 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
+        { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ALTIVEC  },    .unit = "flags" },
+        { "mmx"     , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_MMX      },    .unit = "flags" },
+        { "mmx2"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_MMX2         },    .unit = "flags" },
+        { "sse"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE          },    .unit = "flags" },
+        { "sse2"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE2         },    .unit = "flags" },
+        { "sse2slow", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE2SLOW     },    .unit = "flags" },
+        { "sse3"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE3         },    .unit = "flags" },
+        { "sse3slow", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE3SLOW     },    .unit = "flags" },
+        { "ssse3"   , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSSE3        },    .unit = "flags" },
+        { "atom"    , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ATOM     },    .unit = "flags" },
+        { "sse4.1"  , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE4         },    .unit = "flags" },
+        { "sse4.2"  , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE42        },    .unit = "flags" },
+        { "avx"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_AVX          },    .unit = "flags" },
+        { "xop"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_XOP          },    .unit = "flags" },
+        { "fma4"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_FMA4         },    .unit = "flags" },
+        { "3dnow"   , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_3DNOW        },    .unit = "flags" },
+        { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_3DNOWEXT     },    .unit = "flags" },
+        { NULL },
+    };
+    static const AVClass class = {
+        .class_name = "cpuflags",
+        .item_name  = av_default_item_name,
+        .option     = cpuflags_opts,
+        .version    = LIBAVUTIL_VERSION_INT,
+    };
+
+    int flags = 0, ret;
+    const AVClass *pclass = &class;
+
+    if ((ret = av_opt_eval_flags(&pclass, &cpuflags_opts[0], arg, &flags)) < 0)
+        return ret;
+
+    av_set_cpu_flags_mask(flags);
+    return 0;
+}
+
+static void parse_cpuflags(int argc, char **argv, const OptionDef *options)
+{
+    int idx = locate_option(argc, argv, options, "cpuflags");
+    if (idx && argv[idx + 1])
+        opt_cpuflags("cpuflags", argv[idx + 1]);
+}
+
 #define OFFSET(x) offsetof(OptionsContext, x)
 static const OptionDef options[] = {
     /* main options */
@@ -4446,6 +4507,7 @@ static const OptionDef options[] = {
     { "stats", OPT_BOOL, {&print_stats}, "print progress report during encoding", },
     { "attach", HAS_ARG | OPT_FUNC2, {(void*)opt_attach}, "add an attachment to the output file", "filename" },
     { "dump_attachment", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(dump_attachment)}, "extract an attachment into a file", "filename" },
+    { "cpuflags", HAS_ARG | OPT_EXPERT, {(void*)opt_cpuflags}, "set CPU flags mask", "mask" },
 
     /* video options */
     { "vframes", HAS_ARG | OPT_VIDEO | OPT_FUNC2, {(void*)opt_video_frames}, "set the number of video frames to record", "number" },
@@ -4532,6 +4594,8 @@ int main(int argc, char **argv)
 
     show_banner();
 
+    parse_cpuflags(argc, argv, options);
+
     /* parse options */
     parse_options(&o, argc, argv, options, opt_output_file);
 

cmdutils.c

@@ -320,10 +320,7 @@ void parse_options(void *optctx, int argc, char **argv, const OptionDef *options
     }
 }
 
-/*
- * Return index of option opt in argv or 0 if not found.
- */
-static int locate_option(int argc, char **argv, const OptionDef *options,
+int locate_option(int argc, char **argv, const OptionDef *options,
                   const char *optname)
 {
     const OptionDef *po;

cmdutils.h

@@ -189,6 +189,12 @@ int parse_option(void *optctx, const char *opt, const char *arg,
  */
 void parse_loglevel(int argc, char **argv, const OptionDef *options);
 
+/**
+ * Return index of option opt in argv or 0 if not found.
+ */
+int locate_option(int argc, char **argv, const OptionDef *options,
+                  const char *optname);
+
 /**
  * Check if the given stream matches a stream specifier.
  *

doc/avconv.texi

@@ -808,6 +808,10 @@ avconv -i file.mov -an -vn -bsf:s mov2textsub -c:s copy -f rawvideo sub.txt
 
 @item -tag[:@var{stream_specifier}] @var{codec_tag} (@emph{output,per-stream})
 Force a tag/fourcc for matching streams.
+
+@item -cpuflags mask (@emph{global})
+Set a mask that's applied to autodetected CPU flags.  This option is intended
+for testing. Do not use it unless you know what you're doing.
 @end table
 @c man end OPTIONS