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Introduce first_avfilter and use that, together with AVFilter.next,

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for registering and finding filters, rather than use the struct
AVFilterList, which is removed.

Simplify the filter registration management code.

Originally committed as revision 20387 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2009-10-27 19:52:14 +00:00
parent 290d4a44f1
commit 3555d2e88e
1 changed files with 13 additions and 21 deletions
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34
libavfilter/avfilter.c
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@ -28,13 +28,6 @@ unsigned avfilter_version(void) {
return LIBAVFILTER_VERSION_INT; return LIBAVFILTER_VERSION_INT;
} }
/** list of registered filters */
static struct FilterList
{
AVFilter *filter;
struct FilterList *next;
} *filters = NULL;
/** helper macros to get the in/out pad on the dst/src filter */ /** helper macros to get the in/out pad on the dst/src filter */
#define link_dpad(link) link->dst-> input_pads[link->dstpad] #define link_dpad(link) link->dst-> input_pads[link->dstpad]
#define link_spad(link) link->src->output_pads[link->srcpad] #define link_spad(link) link->src->output_pads[link->srcpad]
@ -327,34 +320,33 @@ void avfilter_draw_slice(AVFilterLink *link, int y, int h)
draw_slice(link, y, h); draw_slice(link, y, h);
} }
AVFilter *first_avfilter = NULL;
AVFilter *avfilter_get_by_name(const char *name) AVFilter *avfilter_get_by_name(const char *name)
{ {
struct FilterList *filt; AVFilter *filter;
for(filt = filters; filt; filt = filt->next) for (filter = first_avfilter; filter; filter = filter->next)
if(!strcmp(filt->filter->name, name)) if (!strcmp(filter->name, name))
return filt->filter; return filter;
return NULL; return NULL;
} }
void avfilter_register(AVFilter *filter) void avfilter_register(AVFilter *filter)
{ {
struct FilterList *newfilt = av_malloc(sizeof(struct FilterList)); AVFilter **p;
p = &first_avfilter;
while (*p)
p = &(*p)->next;
newfilt->filter = filter; *p = filter;
newfilt->next = filters; filter->next = NULL;
filters = newfilt;
} }
void avfilter_uninit(void) void avfilter_uninit(void)
{ {
struct FilterList *tmp; first_avfilter = NULL;
for(; filters; filters = tmp) {
tmp = filters->next;
av_free(filters);
}
} }
static int pad_count(const AVFilterPad *pads) static int pad_count(const AVFilterPad *pads)