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Make avfilter_open() set to NULL the pads and the filters when the 

corresponding count is zero, rather than allocate a 16 bytes sized
block for them. Improve safety.

Originally committed as revision 16565 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2009-01-12 20:30:57 +00:00
parent 7b114c0925
commit 689a5f493b
1 changed files with 5 additions and 1 deletions
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6
libavfilter/avfilter.c
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@ -341,7 +341,7 @@ AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name)
if (!filter)
return 0;
ret = av_malloc(sizeof(AVFilterContext));
ret = av_mallocz(sizeof(AVFilterContext));
ret->av_class = &avfilter_class;
ret->filter = filter;
@ -349,14 +349,18 @@ AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name)
ret->priv = av_mallocz(filter->priv_size);
ret->input_count = pad_count(filter->inputs);
if (ret->input_count) {
ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
}
ret->output_count = pad_count(filter->outputs);
if (ret->output_count) {
ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
}
return ret;
}