Make it accept an optional parameter, e.g. -help codecs/formats/... is
possible.
Make -formats/-codecs/... options aliases for -help <...>.
---
avconv.c | 3 +--
avplay.c | 5 +----
avprobe.c | 3 +--
avserver.c | 2 +-
cmdutils.c | 32 +++++++++++++++++++++++++++-----
cmdutils.h | 40 ++++++++++------------------------------
cmdutils_common_opts.h | 18 +++++++++---------
doc/fftools-common-opts.texi | 6 ++++--
ffmpeg.c | 3 +--
9 files changed, 55 insertions(+), 57 deletions(-)
diff --git a/avconv.c b/avconv.c
index 6804a3b..6819647 100644
--- a/avconv.c
+++ b/avconv.c
@@ -3737,14 +3737,13 @@ static void show_usage(void)
printf("\n");
}
-static void show_help(void)
+void show_help(void)
{
AVCodec *c;
AVOutputFormat *oformat = NULL;
AVInputFormat *iformat = NULL;
const AVClass *class;
- av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:\n",
OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE |
OPT_GRAB, 0);
diff --git a/avplay.c b/avplay.c
index 198dce1..8fdc0b4 100644
--- a/avplay.c
+++ b/avplay.c
@@ -216,8 +216,6 @@ typedef struct VideoState {
int refresh;
} VideoState;
-static void show_help(void);
-
/* options specified by the user */
static AVInputFormat *file_iformat;
static const char *input_filename;
@@ -2977,10 +2975,9 @@ static void show_usage(void)
printf("\n");
}
-static void show_help(void)
+void show_help(void)
{
const AVClass *class;
- av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:\n",
OPT_EXPERT, 0);
diff --git a/avprobe.c b/avprobe.c
index 5e83916..825fd2b 100644
--- a/avprobe.c
+++ b/avprobe.c
@@ -358,10 +358,9 @@ static void opt_input_file(void *optctx, const char *arg)
input_filename = arg;
}
-static void show_help(void)
+void show_help(void)
{
const AVClass *class = avformat_get_class();
- av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:\n", 0, 0);
printf("\n");
diff --git a/avserver.c b/avserver.c
index df9d07d..de405e4 100644
--- a/avserver.c
+++ b/avserver.c
@@ -4648,7 +4648,7 @@ static void opt_debug(void)
logfilename[0] = '-';
}
-static void show_help(void)
+void show_help(void)
{
printf("usage: avserver [options]\n"
"Hyper fast multi format Audio/Video streaming server\n");
diff --git a/cmdutils.c b/cmdutils.c
index 52ec96f..6a94ef1 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -524,7 +524,7 @@ void show_license(void)
);
}
-void show_formats(void)
+static void show_formats(void)
{
AVInputFormat *ifmt=NULL;
AVOutputFormat *ofmt=NULL;
@@ -573,7 +573,7 @@ void show_formats(void)
}
}
-void show_codecs(void)
+static void show_codecs(void)
{
AVCodec *p=NULL, *p2;
const char *last_name;
@@ -649,7 +649,7 @@ void show_codecs(void)
"worse.\n");
}
-void show_bsfs(void)
+static void show_bsfs(void)
{
AVBitStreamFilter *bsf=NULL;
@@ -659,7 +659,7 @@ void show_bsfs(void)
printf("\n");
}
-void show_protocols(void)
+static void show_protocols(void)
{
void *opaque = NULL;
const char *name;
@@ -673,7 +673,7 @@ void show_protocols(void)
printf("%s\n", name);
}
-void show_filters(void)
+static void show_filters(void)
{
AVFilter av_unused(**filter) = NULL;
@@ -717,6 +717,28 @@ void show_pix_fmts(void)
}
}
+int show_help_common(const char *opt, const char *arg)
+{
+ av_log_set_callback(log_callback_help);
+
+ if (!strcmp(opt, "codecs") || (arg && !strcmp(arg, "codecs")))
+ show_codecs();
+ else if (!strcmp(opt, "formats") || (arg && !strcmp(arg, "formats")))
+ show_formats();
+ else if (!strcmp(opt, "bsfs") || (arg && !strcmp(arg, "bsfs")))
+ show_bsfs();
+ else if (!strcmp(opt, "protocols") || (arg && !strcmp(arg, "protocols")))
+ show_protocols();
+ else if (!strcmp(opt, "pix_fmts") || (arg && !strcmp(arg, "pix_fmts")))
+ show_pix_fmts();
+ else if (!strcmp(opt, "filters") || (arg && !strcmp(arg, "filters")))
+ show_filters();
+ else
+ show_help();
+
+ return 0;
+}
+
int read_yesno(void)
{
int c = getchar();
diff --git a/cmdutils.h b/cmdutils.h
index 989d769..3dfd4eb 100644
--- a/cmdutils.h
+++ b/cmdutils.h
@@ -155,6 +155,16 @@ typedef struct {
void show_help_options(const OptionDef *options, const char *msg, int mask,
int value);
/**
+ * Tool's own specific help function.
+ */
+void show_help(void);
+
+/*
+ * Common help function.
+ */
+int show_help_common(const char *opt, const char *arg);
+
+/**
* Parse the command line arguments.
*
* @param optctx an opaque options context
@@ -242,36 +252,6 @@ void show_version(void);
void show_license(void);
/**
- * Print a listing containing all the formats supported by the
- * program.
- */
-void show_formats(void);
-
-/**
- * Print a listing containing all the codecs supported by the
- * program.
- */
-void show_codecs(void);
-
-/**
- * Print a listing containing all the filters supported by the
- * program.
- */
-void show_filters(void);
-
-/**
- * Print a listing containing all the bit stream filters supported by the
- * program.
- */
-void show_bsfs(void);
-
-/**
- * Print a listing containing all the protocols supported by the
- * program.
- */
-void show_protocols(void);
-
-/**
* Print a listing containing all the pixel formats supported by the
* program.
*/
diff --git a/cmdutils_common_opts.h b/cmdutils_common_opts.h
index 9b5e5d2..ce9910f 100644
--- a/cmdutils_common_opts.h
+++ b/cmdutils_common_opts.h
@@ -1,13 +1,13 @@
{ "L", OPT_EXIT, {(void*)show_license}, "show license" },
- { "h", OPT_EXIT, {(void*)show_help}, "show help" },
+ { "h", OPT_EXIT, {.func_arg = show_help_common}, "show help" },
{ "?", OPT_EXIT, {(void*)show_help}, "show help" },
- { "help", OPT_EXIT, {(void*)show_help}, "show help" },
- { "-help", OPT_EXIT, {(void*)show_help}, "show help" },
+ { "help", OPT_EXIT, {.func_arg = show_help_common}, "show help" },
+ { "-help", OPT_EXIT, {.func_arg = show_help_common}, "show help" },
{ "version", OPT_EXIT, {(void*)show_version}, "show version" },
- { "formats" , OPT_EXIT, {(void*)show_formats }, "show available formats"
},
- { "codecs" , OPT_EXIT, {(void*)show_codecs }, "show available codecs"
},
- { "bsfs" , OPT_EXIT, {(void*)show_bsfs }, "show available bit
stream filters" },
- { "protocols", OPT_EXIT, {(void*)show_protocols}, "show available
protocols" },
- { "filters", OPT_EXIT, {(void*)show_filters }, "show available filters"
},
- { "pix_fmts" , OPT_EXIT, {(void*)show_pix_fmts }, "show available pixel
formats" },
+ { "formats" , OPT_EXIT, {.func_arg = show_help_common}, "show available
formats" },
+ { "codecs" , OPT_EXIT, {.func_arg = show_help_common}, "show available
codecs" },
+ { "bsfs" , OPT_EXIT, {.func_arg = show_help_common}, "show available
bit stream filters" },
+ { "protocols", OPT_EXIT, {.func_arg = show_help_common}, "show available
protocols" },
+ { "filters", OPT_EXIT, {.func_arg = show_help_common}, "show available
filters" },
+ { "pix_fmts" , OPT_EXIT, {.func_arg = show_help_common}, "show available
pixel formats" },
{ "loglevel", HAS_ARG, {(void*)opt_loglevel}, "set libav* logging level",
"loglevel" },
diff --git a/doc/fftools-common-opts.texi b/doc/fftools-common-opts.texi
index 8ffc329..1dc003e 100644
--- a/doc/fftools-common-opts.texi
+++ b/doc/fftools-common-opts.texi
@@ -20,8 +20,10 @@ These options are shared amongst the ff* tools.
@item -L
Show license.
-@item -h, -?, -help, --help
-Show help.
+@item -h, -?, -help, --help [@var{item}]
+Show help. If @var{item} is specified, show help on it.
+@var{item} may be one of @code{formats}, @code{codecs}, @code{bsfs},
+@code{protocols}, @code{filters}, @code{pix_fmts}.
@item -version
Show version.
diff --git a/ffmpeg.c b/ffmpeg.c
index a440b9d..397f3c3 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -3921,14 +3921,13 @@ static void show_usage(void)
printf("\n");
}
-static void show_help(void)
+void show_help(void)
{
AVCodec *c;
AVOutputFormat *oformat = NULL;
AVInputFormat *iformat = NULL;
const AVClass *class;
- av_log_set_callback(log_callback_help);
show_usage();
show_help_options(options, "Main options:\n",
OPT_EXPERT | OPT_AUDIO | OPT_VIDEO | OPT_SUBTITLE |
OPT_GRAB, 0);
--
1.7.5.4
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