static int match_format(const char *name, const char *names) { const char *p; int len, namelen; if (!name || !names) return 0; namelen = strlen(name); while ((p = strchr(names, ','))) { len = FFMAX(p - names, namelen); if (!av_strncasecmp(name, names, len)) return 1; names = p + 1; } return !av_strcasecmp(name, names); }