return AVERROR(ENOSYS);
}
-static AVFilter *first_filter;
-static AVFilter **last_filter = &first_filter;
-
-const AVFilter *avfilter_get_by_name(const char *name)
-{
- const AVFilter *f = NULL;
-
- if (!name)
- return NULL;
-
- while ((f = avfilter_next(f)))
- if (!strcmp(f->name, name))
- return (AVFilter *)f;
-
- return NULL;
-}
-
-static AVMutex filter_register_mutex = AV_MUTEX_INITIALIZER;
-
-int avfilter_register(AVFilter *filter)
-{
- AVFilter **f;
-
- /* the filter must select generic or internal exclusively */
- av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE);
-
- ff_mutex_lock(&filter_register_mutex);
- f = last_filter;
-
- while (*f)
- f = &(*f)->next;
- *f = filter;
- filter->next = NULL;
- last_filter = &filter->next;
-
- ff_mutex_unlock(&filter_register_mutex);
-
- return 0;
-}
-
-const AVFilter *avfilter_next(const AVFilter *prev)
-{
- return prev ? prev->next : first_filter;
-}
-
int avfilter_pad_count(const AVFilterPad *pads)
{
int count;
static const AVClass *filter_child_class_next(const AVClass *prev)
{
+ void *opaque = NULL;
const AVFilter *f = NULL;
/* find the filter that corresponds to prev */
- while (prev && (f = avfilter_next(f)))
+ while (prev && (f = av_filter_iterate(&opaque)))
if (f->priv_class == prev)
break;
return NULL;
/* find next filter with specific options */
- while ((f = avfilter_next(f)))
+ while ((f = av_filter_iterate(&opaque)))
if (f->priv_class)
return f->priv_class;
{ "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
{ "threads", "Allowed number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT,
{ .i64 = 0 }, 0, INT_MAX, FLAGS },
+ { "extra_hw_frames", "Number of extra hardware frames to allocate for the user",
+ OFFSET(extra_hw_frames), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ NULL },
};
{
return &avfilter_class;
}
+
+int ff_filter_init_hw_frames(AVFilterContext *avctx, AVFilterLink *link,
+ int default_pool_size)
+{
+ AVHWFramesContext *frames;
+
+ // Must already be set by caller.
+ av_assert0(link->hw_frames_ctx);
+
+ frames = (AVHWFramesContext*)link->hw_frames_ctx->data;
+
+ if (frames->initial_pool_size == 0) {
+ // Dynamic allocation is necessarily supported.
+ } else if (avctx->extra_hw_frames >= 0) {
+ frames->initial_pool_size += avctx->extra_hw_frames;
+ } else {
+ frames->initial_pool_size = default_pool_size;
+ }
+
+ return 0;
+}