diff options
Diffstat (limited to 'avconv_opt.c')
| -rw-r--r-- | avconv_opt.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/avconv_opt.c b/avconv_opt.c index 5bdd7d9c0e..3b841356cc 100644 --- a/avconv_opt.c +++ b/avconv_opt.c @@ -2100,6 +2100,63 @@ static int opt_filter_complex_script(void *optctx, const char *opt, const char * return 0; } +/* Search a class from a codec, format, or filter, named 'opt', in order + * to extract its private options. If the class type is specified, only + * the associated options are printed, otherwise all the ones matching + * the input name are shown. */ +static int show_help_specific(const char *opt) +{ + AVCodec *codec = NULL; + AVFilter *filter = NULL; + AVInputFormat *iformat = NULL; + AVOutputFormat *oformat = NULL; + int flags = AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM | + AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM; + + char *kind = av_get_token(&opt, ":"); + if (!kind) + return 0; + if (*opt) + opt = &opt[1]; // skip ':' + + show_usage(); + + if (!strcmp(kind, "decoder") && + (codec = avcodec_find_decoder_by_name(opt)) && codec->priv_class) + show_help_children(codec->priv_class, flags); + else if (!strcmp(kind, "encoder") && + (codec = avcodec_find_encoder_by_name(opt)) && codec->priv_class) + show_help_children(codec->priv_class, flags); + else if (!strcmp(kind, "demuxer") && + (iformat = av_find_input_format(opt)) && iformat->priv_class) + show_help_children(iformat->priv_class, flags); + else if (!strcmp(kind, "muxer") && + (oformat = av_guess_format(opt, NULL, NULL)) && oformat->priv_class) + show_help_children(oformat->priv_class, flags); + else if (!strcmp(kind, "filter") && + (filter = avfilter_get_by_name(opt)) && filter->priv_class) + show_help_children(filter->priv_class, flags); + else if (!opt) + av_log(NULL, AV_LOG_ERROR, + "Unknown class '%s', only 'decoder', 'encoder', 'demuxer', " + "'muxer', or 'filter' are valid specifiers.\n", kind); + else { + if ((codec = avcodec_find_decoder_by_name(kind)) && codec->priv_class) + show_help_children(codec->priv_class, flags); + if ((codec = avcodec_find_encoder_by_name(kind)) && codec->priv_class) + show_help_children(codec->priv_class, flags); + if ((iformat = av_find_input_format(kind)) && iformat->priv_class) + show_help_children(iformat->priv_class, flags); + if ((oformat = av_guess_format(kind, NULL, NULL)) && oformat->priv_class) + show_help_children(oformat->priv_class, flags); + if ((filter = avfilter_get_by_name(kind)) && filter->priv_class) + show_help_children(filter->priv_class, flags); + } + av_freep(&kind); + + return codec || iformat || oformat || filter; +} + void show_help_default(const char *opt, const char *arg) { /* per-file options have at least one of those set */ @@ -2111,6 +2168,8 @@ void show_help_default(const char *opt, const char *arg) show_advanced = 1; else if (!strcmp(opt, "full")) show_advanced = show_avoptions = 1; + else if (show_help_specific(opt)) + return; else av_log(NULL, AV_LOG_ERROR, "Unknown help option '%s'.\n", opt); } @@ -2121,6 +2180,7 @@ void show_help_default(const char *opt, const char *arg) " -h -- print basic options\n" " -h long -- print more options\n" " -h full -- print all options (including all format and codec specific options, very long)\n" + " -h [type:]name -- print private options from a codec, format or filter named 'name' (set 'type' to print options from a single class)\n" " See man %s for detailed description of the options.\n" "\n", program_name); |