int avfilter_parse_graph(AVFilterGraph *graph, const char *filters, AVFilterInOut *openLinks, AVClass *log_ctx) { int index = 0; char chr = 0; int pad = 0; AVFilterInOut *currInputs = NULL; do { AVFilterContext *filter; filters += consume_whitespace(filters); pad = parse_inputs(&filters, &currInputs, &openLinks, log_ctx); if(pad < 0) goto fail; if(!(filter = parse_filter(&filters, graph, index, log_ctx))) goto fail; if(filter->input_count == 1 && !currInputs && !index) { // First input can be ommitted if it is "[in]" const char *tmp = "[in]"; pad = parse_inputs(&tmp, &currInputs, &openLinks, log_ctx); if(pad < 0) goto fail; } if(link_filter_inouts(filter, &currInputs, &openLinks, log_ctx) < 0) goto fail; pad = parse_outputs(&filters, &currInputs, &openLinks, log_ctx); if(pad < 0) goto fail; filters += consume_whitespace(filters); chr = *filters++; if(chr == ';' && currInputs) { av_log(log_ctx, AV_LOG_ERROR, "Could not find a output to link when parsing \"%s\"\n", filters - 1); goto fail; } index++; } while(chr == ',' || chr == ';'); if(openLinks && !strcmp(openLinks->name, "out") && currInputs) { // Last output can be ommitted if it is "[out]" const char *tmp = "[out]"; if(parse_outputs(&tmp, &currInputs, &openLinks, log_ctx) < 0) goto fail; } return 0; fail: avfilter_destroy_graph(graph); free_inout(openLinks); free_inout(currInputs); return -1; }