[FFmpeg-devel] [PATCH 2/2] cmdutils: add show_help_protocol for get protocol options

[Gyan]

On 22-11-2019 02:26 pm, Steven Liu wrote:
> Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
> ---
>   fftools/cmdutils.c | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
>
> diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
> index 84f98b7c04..fe18093ce1 100644
> --- a/fftools/cmdutils.c
> +++ b/fftools/cmdutils.c
> @@ -1870,6 +1870,21 @@ static void show_help_demuxer(const char *name)
>           show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
>   }
>   
> +static void show_help_protocol(const char *name)
> +{
> +    const URLProtocol *proto = av_find_protocol_by_name(name);;
> +
> +    if (!proto) {
> +        av_log(NULL, AV_LOG_ERROR, "Unknown protocol '%s'.\n", name);
> +        return;
> +    }
> +
> +    printf("Protocol %s:\n", name);
> +
> +    if (proto->priv_data_class)
> +        show_help_children(proto->priv_data_class, AV_OPT_FLAG_DECODING_PARAM);
> +}

Protocols may be employed for output as well. Is there a separate option 
for those protocol options?

> +
>   static void show_help_muxer(const char *name)
>   {
>       const AVCodecDescriptor *desc;
> @@ -2000,6 +2015,8 @@ int show_help(void *optctx, const char *opt, const char *arg)
>           show_help_demuxer(par);
>       } else if (!strcmp(topic, "muxer")) {
>           show_help_muxer(par);
> +    } else if (!strcmp(topic, "protocol")) {
> +        show_help_protocol(par);
>   #if CONFIG_AVFILTER
>       } else if (!strcmp(topic, "filter")) {
>           show_help_filter(par);

Regards,
Gyan