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Fix some potential segfaults.
Commited in SoC by Bobby Bingham on 2007-07-30 15:53:33 Originally committed as revision 11992 to svn://svn.ffmpeg.org/ffmpeg/trunk
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a360f71e3a
commit
7d0e1392a7
@ -64,7 +64,10 @@ AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms)
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void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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{
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AVFilterLink *out = link->dst->outputs[0];
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AVFilterLink *out = NULL;
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if(link->dst->output_count)
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out = link->dst->outputs[0];
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link->cur_pic = picref;
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@ -77,7 +80,10 @@ void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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void avfilter_default_end_frame(AVFilterLink *link)
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{
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AVFilterLink *out = link->dst->outputs[0];
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AVFilterLink *out = NULL;
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if(link->dst->output_count)
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out = link->dst->outputs[0];
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avfilter_unref_pic(link->cur_pic);
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link->cur_pic = NULL;
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@ -110,8 +116,15 @@ void avfilter_unref_pic(AVFilterPicRef *ref)
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* the implementation of one input one output video filters */
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static int default_config_output_link(AVFilterLink *link)
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{
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if(link->src->input_count && link->src->inputs[0]) {
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link->w = link->src->inputs[0]->w;
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link->h = link->src->inputs[0]->h;
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} else {
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/* XXX: any non-simple filter which would cause this branch to be taken
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* really should implement its own config_props() for this link. */
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link->w =
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link->h = 0;
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}
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return 0;
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}
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@ -121,7 +134,12 @@ static int default_config_output_link(AVFilterLink *link)
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* the implementation of one input one output video filters */
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static int *default_query_output_formats(AVFilterLink *link)
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{
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if(link->src->input_count && link->src->inputs[0])
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return avfilter_make_format_list(1, link->src->inputs[0]->format);
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else
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/* XXX: any non-simple filter which would cause this branch to be taken
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* really should implement its own query_formats() for this link */
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return avfilter_make_format_list(0);
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}
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int avfilter_link(AVFilterContext *src, unsigned srcpad,
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@ -130,7 +148,8 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
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AVFilterLink *link;
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int *fmts[2], i, j;
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if(src->outputs[srcpad] || dst->inputs[dstpad])
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if(src->output_count <= srcpad || dst->input_count <= dstpad ||
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src->outputs[srcpad] || dst->inputs[dstpad])
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return -1;
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src->outputs[srcpad] =
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@ -227,6 +246,9 @@ void avfilter_end_frame(AVFilterLink *link)
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void avfilter_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int h)
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{
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if(!link->dst->filter->inputs[link->dstpad].draw_slice)
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return;
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link->dst->filter->inputs[link->dstpad].draw_slice(link, data, y, h);
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}
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@ -296,10 +318,13 @@ AVFilterContext *avfilter_create(AVFilter *filter, char *inst_name)
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ret->av_class->item_name = filter_name;
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ret->filter = filter;
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ret->name = inst_name ? av_strdup(inst_name) : NULL;
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ret->inputs = av_mallocz(sizeof(AVFilterLink*) * pad_count(filter->inputs));
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ret->outputs = av_mallocz(sizeof(AVFilterLink*) * pad_count(filter->outputs));
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ret->priv = av_mallocz(filter->priv_size);
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ret->input_count = pad_count(filter->inputs);
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ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
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ret->output_count = pad_count(filter->outputs);
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ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
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return ret;
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}
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