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Link filters in the same pass as the parser 

Commited in SoC by Vitor Sessak on 2008-04-12 14:12:56

Originally committed as revision 13312 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-05-24 20:40:08 +00:00
parent a59a773413
commit 2b7defc7bb
1 changed files with 53 additions and 36 deletions
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89
libavfilter/graphparser.c
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@ -213,6 +213,51 @@ static void free_inout(AVFilterInOut *head)
}
}
/**
* Process a link. This funcion looks for a matching label in the *inout
* linked list. If none is found, it adds this link to the list.
*/
static int handle_link(char *name, AVFilterInOut **inout, int pad,
enum LinkType type, AVFilterContext *filter)
{
AVFilterInOut *p = *inout;
for (; p && strcmp(p->name, name); p = p->next);
if(!p) {
// First label apearence, add it to the linked list
AVFilterInOut *inoutn = av_malloc(sizeof(AVFilterInOut));
inoutn->name = name;
inoutn->type = type;
inoutn->filter = filter;
inoutn->pad_idx = pad;
inoutn->next = *inout;
*inout = inoutn;
return 0;
}
if(p->type == LinkTypeIn && type == LinkTypeOut) {
if(link_filter(filter, pad, p->filter, p->pad_idx) < 0)
goto fail;
} else if(p->type == LinkTypeOut && type == LinkTypeIn) {
if(link_filter(p->filter, p->pad_idx, filter, pad) < 0)
goto fail;
} else {
av_log(&log_ctx, AV_LOG_ERROR,
"Two links named '%s' are either both input or both output\n",
name);
goto fail;
}
p->filter = NULL;
return 0;
fail:
return -1;
}
/**
* Parse "[a1][link2] ... [etc]"
*/
@ -220,19 +265,14 @@ static int parse_inouts(const char **buf, AVFilterInOut **inout, int pad,
enum LinkType type, AVFilterContext *filter)
{
while (**buf == '[') {
AVFilterInOut *inoutn = av_malloc(sizeof(AVFilterInOut));
parse_link_name(buf, &inoutn->name);
char *name;
if (!inoutn->name) {
av_free(inoutn);
parse_link_name(buf, &name);
if (!name)
return -1;
}
inoutn->type = type;
inoutn->filter = filter;
inoutn->pad_idx = pad++;
inoutn->next = *inout;
*inout = inoutn;
handle_link(name, inout, pad++, type, filter);
consume_whitespace(buf);
}
return pad;
@ -307,6 +347,7 @@ int avfilter_parse_graph(AVFilterGraph *graph, const char *filters,
} while (chr == ',' || chr == ';');
head = inout;
// Process remaining labels. Only inputs and outputs should be left.
for (; inout; inout = inout->next) {
if(!inout->filter)
continue; // Already processed
@ -322,33 +363,9 @@ int avfilter_parse_graph(AVFilterGraph *graph, const char *filters,
goto fail;
} else {
AVFilterInOut *p, *src, *dst;
for (p = inout->next;
p && strcmp(p->name,inout->name); p = p->next);
if(!p) {
av_log(&log_ctx, AV_LOG_ERROR, "Unmatched link: %s.\n",
inout->name);
av_log(&log_ctx, AV_LOG_ERROR, "Unmatched link: %s.\n",
inout->name);
goto fail;
}
if(p->type == LinkTypeIn && inout->type == LinkTypeOut) {
src = inout;
dst = p;
} else if(p->type == LinkTypeOut && inout->type == LinkTypeIn) {
src = p;
dst = inout;
} else {
av_log(&log_ctx, AV_LOG_ERROR, "Two links named '%s' are either both input or both output\n",
inout->name);
goto fail;
}
if(link_filter(src->filter, src->pad_idx, dst->filter, dst->pad_idx) < 0)
goto fail;
src->filter = NULL;
dst->filter = NULL;
}
}