int show_filters(void *optctx, const char *opt, const char *arg)
{
- AVFilter av_unused(**filter) = NULL;
+ const AVFilter av_unused(*filter) = NULL;
char descr[64], *descr_cur;
int i, j;
const AVFilterPad *pad;
printf("Filters:\n");
#if CONFIG_AVFILTER
- while ((filter = av_filter_next(filter)) && *filter) {
+ while ((filter = avfilter_next(filter))) {
descr_cur = descr;
for (i = 0; i < 2; i++) {
if (i) {
*(descr_cur++) = '-';
*(descr_cur++) = '>';
}
- pad = i ? (*filter)->outputs : (*filter)->inputs;
+ pad = i ? filter->outputs : filter->inputs;
for (j = 0; pad && pad[j].name; j++) {
if (descr_cur >= descr + sizeof(descr) - 4)
break;
*(descr_cur++) = '|';
}
*descr_cur = 0;
- printf("%-16s %-10s %s\n", (*filter)->name, descr, (*filter)->description);
+ printf("%-16s %-10s %s\n", filter->name, descr, filter->description);
}
#endif
return 0;
static void show_help_filter(const char *name)
{
#if CONFIG_AVFILTER
- const AVFilter *filter;
+ const AVFilter *f = avfilter_get_by_name(name);
+ int i, count;
if (!name) {
av_log(NULL, AV_LOG_ERROR, "No filter name specified.\n");
return;
- }
- filter = avfilter_get_by_name(name);
- if (!filter) {
- av_log(NULL, AV_LOG_ERROR, "Filter '%s' not found.\n", name);
+ } else if (!f) {
+ av_log(NULL, AV_LOG_ERROR, "Unknown filter '%s'.\n", name);
return;
}
- printf("Filter %s\n", filter->name);
- if (filter->description)
- printf(" %s\n", filter->description);
- if (filter->priv_class)
- show_help_children(filter->priv_class, AV_OPT_FLAG_FILTERING_PARAM);
- else
- printf("No AVOption available\n");
+
+ printf("Filter %s\n", f->name);
+ if (f->description)
+ printf(" %s\n", f->description);
+ printf(" Inputs:\n");
+ count = avfilter_pad_count(f->inputs);
+ for (i = 0; i < count; i++) {
+ printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->inputs, i),
+ media_type_string(avfilter_pad_get_type(f->inputs, i)));
+ }
+ if (f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)
+ printf(" dynamic (depending on the options)\n");
+ else if (!count)
+ printf(" none (source filter)\n");
+
+ printf(" Outputs:\n");
+ count = avfilter_pad_count(f->outputs);
+ for (i = 0; i < count; i++) {
+ printf(" %d %s (%s)\n", i, avfilter_pad_get_name(f->outputs, i),
+ media_type_string(avfilter_pad_get_type(f->outputs, i)));
+ }
+ if (f->flags & AVFILTER_FLAG_DYNAMIC_OUTPUTS)
+ printf(" dynamic (depending on the options)\n");
+ else if (!count)
+ printf(" none (sink filter)\n");
+
+ if (f->priv_class)
+ show_help_children(f->priv_class, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
+ AV_OPT_FLAG_AUDIO_PARAM);
#else
av_log(NULL, AV_LOG_ERROR, "Build without libavfilter; "
"can not to satisfy request\n");